/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-12 00:33:14,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-12 00:33:14,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-12 00:33:14,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-12 00:33:14,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-12 00:33:14,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-12 00:33:14,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-12 00:33:14,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-12 00:33:14,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-12 00:33:14,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-12 00:33:14,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-12 00:33:14,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-12 00:33:14,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-12 00:33:14,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-12 00:33:14,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-12 00:33:14,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-12 00:33:14,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-12 00:33:14,302 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-03-12 00:33:14,335 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-12 00:33:14,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-12 00:33:14,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-12 00:33:14,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-12 00:33:14,339 INFO L138 SettingsManager]: * Use SBE=true [2021-03-12 00:33:14,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-12 00:33:14,339 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-12 00:33:14,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-12 00:33:14,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-12 00:33:14,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-12 00:33:14,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-12 00:33:14,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-12 00:33:14,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-12 00:33:14,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-12 00:33:14,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-12 00:33:14,341 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-12 00:33:14,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-12 00:33:14,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-12 00:33:14,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-12 00:33:14,342 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-12 00:33:14,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-12 00:33:14,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-12 00:33:14,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-12 00:33:14,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-12 00:33:14,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-12 00:33:14,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-12 00:33:14,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-12 00:33:14,343 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-12 00:33:14,343 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-12 00:33:14,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-12 00:33:14,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-12 00:33:14,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-12 00:33:14,656 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-12 00:33:14,657 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-12 00:33:14,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-4.wvr.bpl [2021-03-12 00:33:14,658 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-4.wvr.bpl' [2021-03-12 00:33:14,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-12 00:33:14,706 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-12 00:33:14,707 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-12 00:33:14,707 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-12 00:33:14,707 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-12 00:33:14,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:14" (1/1) ... [2021-03-12 00:33:14,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:14" (1/1) ... [2021-03-12 00:33:14,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-12 00:33:14,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-12 00:33:14,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-12 00:33:14,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-12 00:33:14,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:14" (1/1) ... [2021-03-12 00:33:14,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:14" (1/1) ... [2021-03-12 00:33:14,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:14" (1/1) ... [2021-03-12 00:33:14,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:14" (1/1) ... [2021-03-12 00:33:14,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:14" (1/1) ... [2021-03-12 00:33:14,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:14" (1/1) ... [2021-03-12 00:33:14,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:14" (1/1) ... [2021-03-12 00:33:14,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-12 00:33:14,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-12 00:33:14,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-12 00:33:14,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-12 00:33:14,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-12 00:33:14,822 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-12 00:33:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-12 00:33:14,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-12 00:33:14,823 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-12 00:33:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-12 00:33:14,824 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-12 00:33:14,824 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-12 00:33:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-12 00:33:14,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-12 00:33:14,825 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-12 00:33:14,825 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-12 00:33:14,825 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-12 00:33:14,825 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-12 00:33:14,825 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-12 00:33:14,825 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-12 00:33:14,826 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-12 00:33:15,014 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-12 00:33:15,015 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-12 00:33:15,016 INFO L202 PluginConnector]: Adding new model ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.03 12:33:15 BoogieIcfgContainer [2021-03-12 00:33:15,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-12 00:33:15,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-12 00:33:15,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-12 00:33:15,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-12 00:33:15,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:33:14" (1/2) ... [2021-03-12 00:33:15,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1cc3d2 and model type ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.03 12:33:15, skipping insertion in model container [2021-03-12 00:33:15,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.03 12:33:15" (2/2) ... [2021-03-12 00:33:15,022 INFO L111 eAbstractionObserver]: Analyzing ICFG ticket-4.wvr.bpl [2021-03-12 00:33:15,026 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-12 00:33:15,029 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-12 00:33:15,029 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-12 00:33:15,072 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-12 00:33:15,086 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-12 00:33:15,102 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-12 00:33:15,103 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-12 00:33:15,103 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-12 00:33:15,103 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-12 00:33:15,103 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-12 00:33:15,103 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-12 00:33:15,103 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-12 00:33:15,103 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-12 00:33:15,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 51 places, 38 transitions, 108 flow [2021-03-12 00:33:15,137 INFO L129 PetriNetUnfolder]: 0/34 cut-off events. [2021-03-12 00:33:15,138 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-12 00:33:15,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 34 events. 0/34 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-12 00:33:15,139 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 38 transitions, 108 flow [2021-03-12 00:33:15,143 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 32 transitions, 88 flow [2021-03-12 00:33:15,145 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-12 00:33:15,154 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 32 transitions, 88 flow [2021-03-12 00:33:15,156 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 32 transitions, 88 flow [2021-03-12 00:33:15,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 45 places, 32 transitions, 88 flow [2021-03-12 00:33:15,173 INFO L129 PetriNetUnfolder]: 0/32 cut-off events. [2021-03-12 00:33:15,173 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-12 00:33:15,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 32 events. 0/32 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-12 00:33:15,176 INFO L116 LiptonReduction]: Number of co-enabled transitions 456 [2021-03-12 00:33:16,208 INFO L131 LiptonReduction]: Checked pairs total: 668 [2021-03-12 00:33:16,209 INFO L133 LiptonReduction]: Total number of compositions: 13 [2021-03-12 00:33:16,210 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1067 [2021-03-12 00:33:16,234 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-03-12 00:33:16,234 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-12 00:33:16,234 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:16,235 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:16,235 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:16,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:16,243 INFO L82 PathProgramCache]: Analyzing trace with hash -297693462, now seen corresponding path program 1 times [2021-03-12 00:33:16,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:16,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289755227] [2021-03-12 00:33:16,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:16,416 INFO L142 QuantifierPusher]: treesize reduction 17, result has 37.0 percent of original size [2021-03-12 00:33:16,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-12 00:33:16,428 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,429 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:16,437 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,438 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:16,439 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,439 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:16,440 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,440 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-03-12 00:33:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:16,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289755227] [2021-03-12 00:33:16,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:16,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-12 00:33:16,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48090881] [2021-03-12 00:33:16,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-12 00:33:16,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:16,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-12 00:33:16,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-12 00:33:16,470 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 51 [2021-03-12 00:33:16,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 19 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:16,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:16,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 51 [2021-03-12 00:33:16,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:16,579 INFO L129 PetriNetUnfolder]: 231/426 cut-off events. [2021-03-12 00:33:16,579 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2021-03-12 00:33:16,584 INFO L84 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 426 events. 231/426 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2041 event pairs, 100 based on Foata normal form. 1/423 useless extension candidates. Maximal degree in co-relation 836. Up to 216 conditions per place. [2021-03-12 00:33:16,588 INFO L132 encePairwiseOnDemand]: 40/51 looper letters, 18 selfloop transitions, 9 changer transitions 1/36 dead transitions. [2021-03-12 00:33:16,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 152 flow [2021-03-12 00:33:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-12 00:33:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-12 00:33:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2021-03-12 00:33:16,598 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6823529411764706 [2021-03-12 00:33:16,598 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 174 transitions. [2021-03-12 00:33:16,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 174 transitions. [2021-03-12 00:33:16,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:16,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 174 transitions. [2021-03-12 00:33:16,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:16,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:16,607 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:16,608 INFO L185 Difference]: Start difference. First operand has 32 places, 19 transitions, 62 flow. Second operand 5 states and 174 transitions. [2021-03-12 00:33:16,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 152 flow [2021-03-12 00:33:16,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-03-12 00:33:16,613 INFO L241 Difference]: Finished difference. Result has 31 places, 26 transitions, 110 flow [2021-03-12 00:33:16,615 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2021-03-12 00:33:16,615 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2021-03-12 00:33:16,616 INFO L480 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 110 flow [2021-03-12 00:33:16,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:16,616 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:16,616 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:16,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-12 00:33:16,616 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:16,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:16,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1098360672, now seen corresponding path program 2 times [2021-03-12 00:33:16,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:16,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006884557] [2021-03-12 00:33:16,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:16,649 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,649 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:16,653 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,653 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,657 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,658 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,662 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,663 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:16,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006884557] [2021-03-12 00:33:16,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:16,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:33:16,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721642409] [2021-03-12 00:33:16,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:33:16,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:16,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:33:16,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:33:16,672 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:16,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 110 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:16,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:16,672 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:16,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:16,824 INFO L129 PetriNetUnfolder]: 329/620 cut-off events. [2021-03-12 00:33:16,825 INFO L130 PetriNetUnfolder]: For 336/374 co-relation queries the response was YES. [2021-03-12 00:33:16,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1905 conditions, 620 events. 329/620 cut-off events. For 336/374 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3318 event pairs, 64 based on Foata normal form. 20/636 useless extension candidates. Maximal degree in co-relation 1843. Up to 288 conditions per place. [2021-03-12 00:33:16,850 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 21 selfloop transitions, 29 changer transitions 0/59 dead transitions. [2021-03-12 00:33:16,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 59 transitions, 356 flow [2021-03-12 00:33:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:33:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:33:16,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2021-03-12 00:33:16,853 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6209150326797386 [2021-03-12 00:33:16,853 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 190 transitions. [2021-03-12 00:33:16,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 190 transitions. [2021-03-12 00:33:16,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:16,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 190 transitions. [2021-03-12 00:33:16,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:16,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:16,856 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:16,856 INFO L185 Difference]: Start difference. First operand has 31 places, 26 transitions, 110 flow. Second operand 6 states and 190 transitions. [2021-03-12 00:33:16,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 59 transitions, 356 flow [2021-03-12 00:33:16,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 59 transitions, 326 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-03-12 00:33:16,861 INFO L241 Difference]: Finished difference. Result has 34 places, 50 transitions, 297 flow [2021-03-12 00:33:16,861 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=34, PETRI_TRANSITIONS=50} [2021-03-12 00:33:16,862 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2021-03-12 00:33:16,862 INFO L480 AbstractCegarLoop]: Abstraction has has 34 places, 50 transitions, 297 flow [2021-03-12 00:33:16,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:16,862 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:16,862 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:16,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-12 00:33:16,862 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:16,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:16,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1830642652, now seen corresponding path program 3 times [2021-03-12 00:33:16,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:16,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561853557] [2021-03-12 00:33:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:16,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,909 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:16,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,916 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:16,927 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:16,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:16,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561853557] [2021-03-12 00:33:16,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:16,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-12 00:33:16,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547712244] [2021-03-12 00:33:16,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-12 00:33:16,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:16,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-12 00:33:16,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-12 00:33:16,930 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:16,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 50 transitions, 297 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:16,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:16,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:16,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:17,059 INFO L129 PetriNetUnfolder]: 350/650 cut-off events. [2021-03-12 00:33:17,060 INFO L130 PetriNetUnfolder]: For 605/677 co-relation queries the response was YES. [2021-03-12 00:33:17,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2599 conditions, 650 events. 350/650 cut-off events. For 605/677 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3411 event pairs, 61 based on Foata normal form. 25/671 useless extension candidates. Maximal degree in co-relation 2544. Up to 527 conditions per place. [2021-03-12 00:33:17,066 INFO L132 encePairwiseOnDemand]: 43/51 looper letters, 47 selfloop transitions, 26 changer transitions 0/82 dead transitions. [2021-03-12 00:33:17,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 82 transitions, 654 flow [2021-03-12 00:33:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-12 00:33:17,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-12 00:33:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2021-03-12 00:33:17,071 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6039215686274509 [2021-03-12 00:33:17,071 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 154 transitions. [2021-03-12 00:33:17,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 154 transitions. [2021-03-12 00:33:17,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:17,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 154 transitions. [2021-03-12 00:33:17,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,077 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,077 INFO L185 Difference]: Start difference. First operand has 34 places, 50 transitions, 297 flow. Second operand 5 states and 154 transitions. [2021-03-12 00:33:17,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 82 transitions, 654 flow [2021-03-12 00:33:17,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 82 transitions, 633 flow, removed 8 selfloop flow, removed 1 redundant places. [2021-03-12 00:33:17,088 INFO L241 Difference]: Finished difference. Result has 39 places, 71 transitions, 545 flow [2021-03-12 00:33:17,088 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=545, PETRI_PLACES=39, PETRI_TRANSITIONS=71} [2021-03-12 00:33:17,088 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2021-03-12 00:33:17,088 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 71 transitions, 545 flow [2021-03-12 00:33:17,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,089 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:17,089 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:17,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-12 00:33:17,089 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:17,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:17,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1875283312, now seen corresponding path program 4 times [2021-03-12 00:33:17,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:17,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123399004] [2021-03-12 00:33:17,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:17,115 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:17,118 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,118 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:17,121 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,122 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:17,126 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:17,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:17,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123399004] [2021-03-12 00:33:17,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:17,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:33:17,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422775736] [2021-03-12 00:33:17,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:33:17,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:17,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:33:17,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:33:17,133 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:17,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 71 transitions, 545 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:17,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:17,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:17,283 INFO L129 PetriNetUnfolder]: 360/690 cut-off events. [2021-03-12 00:33:17,283 INFO L130 PetriNetUnfolder]: For 1113/1163 co-relation queries the response was YES. [2021-03-12 00:33:17,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3005 conditions, 690 events. 360/690 cut-off events. For 1113/1163 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3735 event pairs, 44 based on Foata normal form. 36/723 useless extension candidates. Maximal degree in co-relation 2936. Up to 317 conditions per place. [2021-03-12 00:33:17,289 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 22 selfloop transitions, 62 changer transitions 0/93 dead transitions. [2021-03-12 00:33:17,290 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 93 transitions, 894 flow [2021-03-12 00:33:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:33:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:33:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2021-03-12 00:33:17,291 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6209150326797386 [2021-03-12 00:33:17,291 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 190 transitions. [2021-03-12 00:33:17,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 190 transitions. [2021-03-12 00:33:17,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:17,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 190 transitions. [2021-03-12 00:33:17,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,298 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,298 INFO L185 Difference]: Start difference. First operand has 39 places, 71 transitions, 545 flow. Second operand 6 states and 190 transitions. [2021-03-12 00:33:17,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 93 transitions, 894 flow [2021-03-12 00:33:17,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 93 transitions, 889 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-12 00:33:17,305 INFO L241 Difference]: Finished difference. Result has 44 places, 85 transitions, 833 flow [2021-03-12 00:33:17,309 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=833, PETRI_PLACES=44, PETRI_TRANSITIONS=85} [2021-03-12 00:33:17,309 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 12 predicate places. [2021-03-12 00:33:17,310 INFO L480 AbstractCegarLoop]: Abstraction has has 44 places, 85 transitions, 833 flow [2021-03-12 00:33:17,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,310 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:17,310 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:17,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-12 00:33:17,310 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:17,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:17,311 INFO L82 PathProgramCache]: Analyzing trace with hash -101298858, now seen corresponding path program 5 times [2021-03-12 00:33:17,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:17,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954916507] [2021-03-12 00:33:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:17,369 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:17,372 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,372 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:17,377 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,378 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:17,382 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,383 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:17,387 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,388 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:17,388 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,389 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:17,394 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,394 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:17,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954916507] [2021-03-12 00:33:17,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:17,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-12 00:33:17,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459826059] [2021-03-12 00:33:17,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:33:17,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:17,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:33:17,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:33:17,397 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:17,397 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 85 transitions, 833 flow. Second operand has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:17,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:17,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:17,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:17,604 INFO L129 PetriNetUnfolder]: 396/776 cut-off events. [2021-03-12 00:33:17,605 INFO L130 PetriNetUnfolder]: For 1688/1764 co-relation queries the response was YES. [2021-03-12 00:33:17,607 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3911 conditions, 776 events. 396/776 cut-off events. For 1688/1764 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 4466 event pairs, 50 based on Foata normal form. 23/796 useless extension candidates. Maximal degree in co-relation 3844. Up to 377 conditions per place. [2021-03-12 00:33:17,613 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 22 selfloop transitions, 113 changer transitions 0/144 dead transitions. [2021-03-12 00:33:17,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 144 transitions, 1626 flow [2021-03-12 00:33:17,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 00:33:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-12 00:33:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2021-03-12 00:33:17,615 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2021-03-12 00:33:17,615 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 224 transitions. [2021-03-12 00:33:17,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 224 transitions. [2021-03-12 00:33:17,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:17,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 224 transitions. [2021-03-12 00:33:17,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 51.0) internal successors, (408), 8 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,617 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 51.0) internal successors, (408), 8 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,617 INFO L185 Difference]: Start difference. First operand has 44 places, 85 transitions, 833 flow. Second operand 7 states and 224 transitions. [2021-03-12 00:33:17,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 144 transitions, 1626 flow [2021-03-12 00:33:17,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 144 transitions, 1518 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-12 00:33:17,625 INFO L241 Difference]: Finished difference. Result has 49 places, 136 transitions, 1607 flow [2021-03-12 00:33:17,626 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1607, PETRI_PLACES=49, PETRI_TRANSITIONS=136} [2021-03-12 00:33:17,626 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2021-03-12 00:33:17,626 INFO L480 AbstractCegarLoop]: Abstraction has has 49 places, 136 transitions, 1607 flow [2021-03-12 00:33:17,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:17,626 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:17,626 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:17,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-12 00:33:17,627 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:17,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1202968700, now seen corresponding path program 6 times [2021-03-12 00:33:17,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:17,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288788193] [2021-03-12 00:33:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:17,644 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:17,648 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:17,652 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,652 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:17,657 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,658 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:17,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288788193] [2021-03-12 00:33:17,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:17,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-12 00:33:17,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714647725] [2021-03-12 00:33:17,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-12 00:33:17,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:17,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-12 00:33:17,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-12 00:33:17,660 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:17,660 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 136 transitions, 1607 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,660 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:17,660 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:17,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:17,810 INFO L129 PetriNetUnfolder]: 401/792 cut-off events. [2021-03-12 00:33:17,810 INFO L130 PetriNetUnfolder]: For 2932/3045 co-relation queries the response was YES. [2021-03-12 00:33:17,813 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4789 conditions, 792 events. 401/792 cut-off events. For 2932/3045 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 4683 event pairs, 74 based on Foata normal form. 43/832 useless extension candidates. Maximal degree in co-relation 4723. Up to 633 conditions per place. [2021-03-12 00:33:17,818 INFO L132 encePairwiseOnDemand]: 43/51 looper letters, 99 selfloop transitions, 53 changer transitions 0/161 dead transitions. [2021-03-12 00:33:17,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 161 transitions, 2209 flow [2021-03-12 00:33:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-12 00:33:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-12 00:33:17,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2021-03-12 00:33:17,820 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6039215686274509 [2021-03-12 00:33:17,820 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 154 transitions. [2021-03-12 00:33:17,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 154 transitions. [2021-03-12 00:33:17,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:17,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 154 transitions. [2021-03-12 00:33:17,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,821 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,821 INFO L185 Difference]: Start difference. First operand has 49 places, 136 transitions, 1607 flow. Second operand 5 states and 154 transitions. [2021-03-12 00:33:17,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 161 transitions, 2209 flow [2021-03-12 00:33:17,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 161 transitions, 2170 flow, removed 17 selfloop flow, removed 1 redundant places. [2021-03-12 00:33:17,833 INFO L241 Difference]: Finished difference. Result has 53 places, 148 transitions, 1892 flow [2021-03-12 00:33:17,833 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1892, PETRI_PLACES=53, PETRI_TRANSITIONS=148} [2021-03-12 00:33:17,834 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2021-03-12 00:33:17,834 INFO L480 AbstractCegarLoop]: Abstraction has has 53 places, 148 transitions, 1892 flow [2021-03-12 00:33:17,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,834 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:17,834 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:17,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-12 00:33:17,834 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:17,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:17,835 INFO L82 PathProgramCache]: Analyzing trace with hash 291698712, now seen corresponding path program 7 times [2021-03-12 00:33:17,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:17,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4866204] [2021-03-12 00:33:17,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:17,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:17,853 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,854 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:17,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:17,862 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:17,863 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:17,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4866204] [2021-03-12 00:33:17,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:17,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-12 00:33:17,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755565519] [2021-03-12 00:33:17,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-12 00:33:17,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:17,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-12 00:33:17,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-12 00:33:17,864 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:17,865 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 148 transitions, 1892 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:17,865 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:17,865 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:17,865 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:18,019 INFO L129 PetriNetUnfolder]: 393/787 cut-off events. [2021-03-12 00:33:18,019 INFO L130 PetriNetUnfolder]: For 3299/3396 co-relation queries the response was YES. [2021-03-12 00:33:18,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4808 conditions, 787 events. 393/787 cut-off events. For 3299/3396 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4718 event pairs, 66 based on Foata normal form. 37/821 useless extension candidates. Maximal degree in co-relation 4745. Up to 621 conditions per place. [2021-03-12 00:33:18,028 INFO L132 encePairwiseOnDemand]: 43/51 looper letters, 99 selfloop transitions, 56 changer transitions 1/165 dead transitions. [2021-03-12 00:33:18,028 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 165 transitions, 2394 flow [2021-03-12 00:33:18,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-12 00:33:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-12 00:33:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2021-03-12 00:33:18,029 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6039215686274509 [2021-03-12 00:33:18,029 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 154 transitions. [2021-03-12 00:33:18,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 154 transitions. [2021-03-12 00:33:18,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:18,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 154 transitions. [2021-03-12 00:33:18,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,031 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,031 INFO L185 Difference]: Start difference. First operand has 53 places, 148 transitions, 1892 flow. Second operand 5 states and 154 transitions. [2021-03-12 00:33:18,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 165 transitions, 2394 flow [2021-03-12 00:33:18,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 165 transitions, 2339 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-12 00:33:18,044 INFO L241 Difference]: Finished difference. Result has 56 places, 153 transitions, 2069 flow [2021-03-12 00:33:18,044 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2069, PETRI_PLACES=56, PETRI_TRANSITIONS=153} [2021-03-12 00:33:18,044 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2021-03-12 00:33:18,044 INFO L480 AbstractCegarLoop]: Abstraction has has 56 places, 153 transitions, 2069 flow [2021-03-12 00:33:18,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,045 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:18,045 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:18,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-12 00:33:18,045 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:18,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:18,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1820071608, now seen corresponding path program 8 times [2021-03-12 00:33:18,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:18,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575059237] [2021-03-12 00:33:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:18,077 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,078 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:18,080 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,081 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,085 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,085 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,090 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,090 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,095 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:18,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575059237] [2021-03-12 00:33:18,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:18,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:33:18,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318071150] [2021-03-12 00:33:18,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:33:18,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:18,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:33:18,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:33:18,101 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:18,101 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 153 transitions, 2069 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:18,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:18,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:18,260 INFO L129 PetriNetUnfolder]: 368/755 cut-off events. [2021-03-12 00:33:18,260 INFO L130 PetriNetUnfolder]: For 3077/3085 co-relation queries the response was YES. [2021-03-12 00:33:18,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4616 conditions, 755 events. 368/755 cut-off events. For 3077/3085 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4449 event pairs, 72 based on Foata normal form. 23/778 useless extension candidates. Maximal degree in co-relation 4532. Up to 367 conditions per place. [2021-03-12 00:33:18,267 INFO L132 encePairwiseOnDemand]: 41/51 looper letters, 44 selfloop transitions, 109 changer transitions 0/162 dead transitions. [2021-03-12 00:33:18,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 162 transitions, 2475 flow [2021-03-12 00:33:18,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:33:18,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:33:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-12 00:33:18,268 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6143790849673203 [2021-03-12 00:33:18,269 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-12 00:33:18,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-12 00:33:18,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:18,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-12 00:33:18,269 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) [2021-03-12 00:33:18,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,270 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,270 INFO L185 Difference]: Start difference. First operand has 56 places, 153 transitions, 2069 flow. Second operand 6 states and 188 transitions. [2021-03-12 00:33:18,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 162 transitions, 2475 flow [2021-03-12 00:33:18,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 162 transitions, 2421 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-12 00:33:18,282 INFO L241 Difference]: Finished difference. Result has 61 places, 157 transitions, 2385 flow [2021-03-12 00:33:18,282 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2385, PETRI_PLACES=61, PETRI_TRANSITIONS=157} [2021-03-12 00:33:18,282 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 29 predicate places. [2021-03-12 00:33:18,282 INFO L480 AbstractCegarLoop]: Abstraction has has 61 places, 157 transitions, 2385 flow [2021-03-12 00:33:18,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,283 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:18,283 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:18,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-12 00:33:18,283 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:18,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:18,283 INFO L82 PathProgramCache]: Analyzing trace with hash 88146614, now seen corresponding path program 9 times [2021-03-12 00:33:18,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:18,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452148909] [2021-03-12 00:33:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:18,296 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,297 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:18,299 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,300 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:18,307 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,313 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,319 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,320 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:18,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452148909] [2021-03-12 00:33:18,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:18,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-12 00:33:18,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004811930] [2021-03-12 00:33:18,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:33:18,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:18,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:33:18,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:33:18,322 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:18,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 157 transitions, 2385 flow. Second operand has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:18,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:18,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:18,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:18,508 INFO L129 PetriNetUnfolder]: 374/805 cut-off events. [2021-03-12 00:33:18,509 INFO L130 PetriNetUnfolder]: For 4036/4064 co-relation queries the response was YES. [2021-03-12 00:33:18,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5354 conditions, 805 events. 374/805 cut-off events. For 4036/4064 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5008 event pairs, 24 based on Foata normal form. 11/815 useless extension candidates. Maximal degree in co-relation 5253. Up to 393 conditions per place. [2021-03-12 00:33:18,517 INFO L132 encePairwiseOnDemand]: 41/51 looper letters, 25 selfloop transitions, 157 changer transitions 2/193 dead transitions. [2021-03-12 00:33:18,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 193 transitions, 3066 flow [2021-03-12 00:33:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 00:33:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-12 00:33:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2021-03-12 00:33:18,519 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6218487394957983 [2021-03-12 00:33:18,519 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 222 transitions. [2021-03-12 00:33:18,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 222 transitions. [2021-03-12 00:33:18,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:18,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 222 transitions. [2021-03-12 00:33:18,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 51.0) internal successors, (408), 8 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,520 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 51.0) internal successors, (408), 8 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,521 INFO L185 Difference]: Start difference. First operand has 61 places, 157 transitions, 2385 flow. Second operand 7 states and 222 transitions. [2021-03-12 00:33:18,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 193 transitions, 3066 flow [2021-03-12 00:33:18,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 193 transitions, 2909 flow, removed 16 selfloop flow, removed 3 redundant places. [2021-03-12 00:33:18,536 INFO L241 Difference]: Finished difference. Result has 67 places, 183 transitions, 2994 flow [2021-03-12 00:33:18,537 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2994, PETRI_PLACES=67, PETRI_TRANSITIONS=183} [2021-03-12 00:33:18,537 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 35 predicate places. [2021-03-12 00:33:18,537 INFO L480 AbstractCegarLoop]: Abstraction has has 67 places, 183 transitions, 2994 flow [2021-03-12 00:33:18,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:18,537 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:18,537 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:18,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-12 00:33:18,538 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:18,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:18,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1007905506, now seen corresponding path program 10 times [2021-03-12 00:33:18,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:18,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151800981] [2021-03-12 00:33:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:18,550 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,551 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:18,553 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,553 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,557 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,557 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,561 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,562 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,563 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,563 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,568 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:18,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151800981] [2021-03-12 00:33:18,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:18,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:33:18,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291157969] [2021-03-12 00:33:18,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:33:18,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:18,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:33:18,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:33:18,572 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:18,572 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 183 transitions, 2994 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:18,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:18,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:18,735 INFO L129 PetriNetUnfolder]: 274/617 cut-off events. [2021-03-12 00:33:18,735 INFO L130 PetriNetUnfolder]: For 4182/4323 co-relation queries the response was YES. [2021-03-12 00:33:18,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4756 conditions, 617 events. 274/617 cut-off events. For 4182/4323 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3594 event pairs, 17 based on Foata normal form. 70/686 useless extension candidates. Maximal degree in co-relation 4681. Up to 299 conditions per place. [2021-03-12 00:33:18,742 INFO L132 encePairwiseOnDemand]: 41/51 looper letters, 73 selfloop transitions, 105 changer transitions 0/187 dead transitions. [2021-03-12 00:33:18,742 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 187 transitions, 3328 flow [2021-03-12 00:33:18,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:33:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:33:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-12 00:33:18,743 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6143790849673203 [2021-03-12 00:33:18,743 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-12 00:33:18,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-12 00:33:18,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:18,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-12 00:33:18,744 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) [2021-03-12 00:33:18,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,745 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,745 INFO L185 Difference]: Start difference. First operand has 67 places, 183 transitions, 2994 flow. Second operand 6 states and 188 transitions. [2021-03-12 00:33:18,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 187 transitions, 3328 flow [2021-03-12 00:33:18,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 187 transitions, 3151 flow, removed 78 selfloop flow, removed 2 redundant places. [2021-03-12 00:33:18,766 INFO L241 Difference]: Finished difference. Result has 71 places, 179 transitions, 2972 flow [2021-03-12 00:33:18,767 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2972, PETRI_PLACES=71, PETRI_TRANSITIONS=179} [2021-03-12 00:33:18,767 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 39 predicate places. [2021-03-12 00:33:18,767 INFO L480 AbstractCegarLoop]: Abstraction has has 71 places, 179 transitions, 2972 flow [2021-03-12 00:33:18,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,768 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:18,768 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:18,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-12 00:33:18,768 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:18,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:18,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1152388274, now seen corresponding path program 11 times [2021-03-12 00:33:18,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:18,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527912596] [2021-03-12 00:33:18,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:18,799 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,799 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:18,802 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,809 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,810 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,816 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,818 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,818 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,818 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,819 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,819 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:18,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:18,825 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:18,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527912596] [2021-03-12 00:33:18,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:18,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:33:18,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677144199] [2021-03-12 00:33:18,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:33:18,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:18,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:33:18,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:33:18,829 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:18,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 179 transitions, 2972 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:18,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:18,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:18,981 INFO L129 PetriNetUnfolder]: 268/616 cut-off events. [2021-03-12 00:33:18,981 INFO L130 PetriNetUnfolder]: For 4287/4319 co-relation queries the response was YES. [2021-03-12 00:33:18,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4831 conditions, 616 events. 268/616 cut-off events. For 4287/4319 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3667 event pairs, 17 based on Foata normal form. 23/638 useless extension candidates. Maximal degree in co-relation 4756. Up to 299 conditions per place. [2021-03-12 00:33:18,991 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 74 selfloop transitions, 107 changer transitions 4/194 dead transitions. [2021-03-12 00:33:18,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 194 transitions, 3553 flow [2021-03-12 00:33:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:33:18,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:33:18,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2021-03-12 00:33:18,992 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6176470588235294 [2021-03-12 00:33:18,993 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 189 transitions. [2021-03-12 00:33:18,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 189 transitions. [2021-03-12 00:33:18,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:18,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 189 transitions. [2021-03-12 00:33:18,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.5) internal successors, (189), 6 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,994 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:18,994 INFO L185 Difference]: Start difference. First operand has 71 places, 179 transitions, 2972 flow. Second operand 6 states and 189 transitions. [2021-03-12 00:33:18,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 194 transitions, 3553 flow [2021-03-12 00:33:19,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 194 transitions, 3404 flow, removed 12 selfloop flow, removed 3 redundant places. [2021-03-12 00:33:19,015 INFO L241 Difference]: Finished difference. Result has 73 places, 180 transitions, 3066 flow [2021-03-12 00:33:19,015 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3066, PETRI_PLACES=73, PETRI_TRANSITIONS=180} [2021-03-12 00:33:19,015 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 41 predicate places. [2021-03-12 00:33:19,015 INFO L480 AbstractCegarLoop]: Abstraction has has 73 places, 180 transitions, 3066 flow [2021-03-12 00:33:19,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:19,016 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:19,016 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:19,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-12 00:33:19,016 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:19,016 INFO L82 PathProgramCache]: Analyzing trace with hash -420868260, now seen corresponding path program 12 times [2021-03-12 00:33:19,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:19,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303325441] [2021-03-12 00:33:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:19,039 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,040 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:19,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,047 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,047 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:19,052 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,054 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,060 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,060 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:19,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303325441] [2021-03-12 00:33:19,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:19,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:33:19,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530940124] [2021-03-12 00:33:19,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:33:19,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:19,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:33:19,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:33:19,062 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:19,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 180 transitions, 3066 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:19,062 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:19,062 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:19,062 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:19,216 INFO L129 PetriNetUnfolder]: 285/688 cut-off events. [2021-03-12 00:33:19,216 INFO L130 PetriNetUnfolder]: For 4529/4561 co-relation queries the response was YES. [2021-03-12 00:33:19,218 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5267 conditions, 688 events. 285/688 cut-off events. For 4529/4561 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4406 event pairs, 17 based on Foata normal form. 22/709 useless extension candidates. Maximal degree in co-relation 5187. Up to 245 conditions per place. [2021-03-12 00:33:19,223 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 74 selfloop transitions, 141 changer transitions 3/227 dead transitions. [2021-03-12 00:33:19,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 227 transitions, 4020 flow [2021-03-12 00:33:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:33:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:33:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-12 00:33:19,225 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6143790849673203 [2021-03-12 00:33:19,225 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-12 00:33:19,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-12 00:33:19,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:19,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-12 00:33:19,225 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) [2021-03-12 00:33:19,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:19,226 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:19,226 INFO L185 Difference]: Start difference. First operand has 73 places, 180 transitions, 3066 flow. Second operand 6 states and 188 transitions. [2021-03-12 00:33:19,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 227 transitions, 4020 flow [2021-03-12 00:33:19,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 227 transitions, 3897 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-12 00:33:19,252 INFO L241 Difference]: Finished difference. Result has 78 places, 207 transitions, 3814 flow [2021-03-12 00:33:19,252 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3814, PETRI_PLACES=78, PETRI_TRANSITIONS=207} [2021-03-12 00:33:19,252 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 46 predicate places. [2021-03-12 00:33:19,252 INFO L480 AbstractCegarLoop]: Abstraction has has 78 places, 207 transitions, 3814 flow [2021-03-12 00:33:19,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:19,252 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:19,253 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:19,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-12 00:33:19,253 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:19,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:19,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1437130270, now seen corresponding path program 13 times [2021-03-12 00:33:19,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:19,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566784784] [2021-03-12 00:33:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:19,277 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:19,280 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,281 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,284 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,284 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,290 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,295 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,295 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,306 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,307 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:19,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566784784] [2021-03-12 00:33:19,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:19,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-12 00:33:19,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921852276] [2021-03-12 00:33:19,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:33:19,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:19,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:33:19,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:33:19,309 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:19,309 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 207 transitions, 3814 flow. Second operand has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:19,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:19,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:19,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:19,520 INFO L129 PetriNetUnfolder]: 289/707 cut-off events. [2021-03-12 00:33:19,520 INFO L130 PetriNetUnfolder]: For 6828/6864 co-relation queries the response was YES. [2021-03-12 00:33:19,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6133 conditions, 707 events. 289/707 cut-off events. For 6828/6864 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 4651 event pairs, 16 based on Foata normal form. 27/733 useless extension candidates. Maximal degree in co-relation 6054. Up to 374 conditions per place. [2021-03-12 00:33:19,535 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 105 selfloop transitions, 118 changer transitions 5/237 dead transitions. [2021-03-12 00:33:19,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 237 transitions, 4751 flow [2021-03-12 00:33:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:33:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:33:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 253 transitions. [2021-03-12 00:33:19,536 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6200980392156863 [2021-03-12 00:33:19,537 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 253 transitions. [2021-03-12 00:33:19,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 253 transitions. [2021-03-12 00:33:19,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:19,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 253 transitions. [2021-03-12 00:33:19,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 31.625) internal successors, (253), 8 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:19,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 51.0) internal successors, (459), 9 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:19,538 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 51.0) internal successors, (459), 9 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:19,538 INFO L185 Difference]: Start difference. First operand has 78 places, 207 transitions, 3814 flow. Second operand 8 states and 253 transitions. [2021-03-12 00:33:19,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 237 transitions, 4751 flow [2021-03-12 00:33:19,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 237 transitions, 4721 flow, removed 13 selfloop flow, removed 1 redundant places. [2021-03-12 00:33:19,567 INFO L241 Difference]: Finished difference. Result has 84 places, 217 transitions, 4232 flow [2021-03-12 00:33:19,567 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3790, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4232, PETRI_PLACES=84, PETRI_TRANSITIONS=217} [2021-03-12 00:33:19,567 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 52 predicate places. [2021-03-12 00:33:19,567 INFO L480 AbstractCegarLoop]: Abstraction has has 84 places, 217 transitions, 4232 flow [2021-03-12 00:33:19,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:19,568 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:19,568 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:19,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-12 00:33:19,568 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:19,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1579281840, now seen corresponding path program 14 times [2021-03-12 00:33:19,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:19,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719118283] [2021-03-12 00:33:19,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:19,593 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,593 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:19,596 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,596 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,602 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,602 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,608 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,612 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,613 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:19,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719118283] [2021-03-12 00:33:19,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:19,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:33:19,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249641897] [2021-03-12 00:33:19,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:33:19,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:19,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:33:19,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:33:19,615 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:19,615 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 217 transitions, 4232 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:19,615 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:19,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:19,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:19,800 INFO L129 PetriNetUnfolder]: 268/696 cut-off events. [2021-03-12 00:33:19,801 INFO L130 PetriNetUnfolder]: For 7109/7147 co-relation queries the response was YES. [2021-03-12 00:33:19,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6073 conditions, 696 events. 268/696 cut-off events. For 7109/7147 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 4722 event pairs, 14 based on Foata normal form. 32/727 useless extension candidates. Maximal degree in co-relation 5984. Up to 372 conditions per place. [2021-03-12 00:33:19,806 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 99 selfloop transitions, 112 changer transitions 9/229 dead transitions. [2021-03-12 00:33:19,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 229 transitions, 4834 flow [2021-03-12 00:33:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:33:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:33:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2021-03-12 00:33:19,807 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6176470588235294 [2021-03-12 00:33:19,808 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 189 transitions. [2021-03-12 00:33:19,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 189 transitions. [2021-03-12 00:33:19,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:19,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 189 transitions. [2021-03-12 00:33:19,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.5) internal successors, (189), 6 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:19,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:19,810 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:19,811 INFO L185 Difference]: Start difference. First operand has 84 places, 217 transitions, 4232 flow. Second operand 6 states and 189 transitions. [2021-03-12 00:33:19,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 229 transitions, 4834 flow [2021-03-12 00:33:19,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 229 transitions, 4590 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-03-12 00:33:19,838 INFO L241 Difference]: Finished difference. Result has 84 places, 211 transitions, 4049 flow [2021-03-12 00:33:19,839 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3790, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4049, PETRI_PLACES=84, PETRI_TRANSITIONS=211} [2021-03-12 00:33:19,839 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 52 predicate places. [2021-03-12 00:33:19,839 INFO L480 AbstractCegarLoop]: Abstraction has has 84 places, 211 transitions, 4049 flow [2021-03-12 00:33:19,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:19,839 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:19,839 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:19,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-12 00:33:19,840 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:19,840 INFO L82 PathProgramCache]: Analyzing trace with hash -391557852, now seen corresponding path program 15 times [2021-03-12 00:33:19,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:19,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666521430] [2021-03-12 00:33:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:19,861 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,861 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:19,866 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,869 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,870 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,874 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,879 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,886 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:19,892 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:19,893 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:19,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666521430] [2021-03-12 00:33:19,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:19,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:33:19,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279367995] [2021-03-12 00:33:19,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:33:19,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:19,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:33:19,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:33:19,895 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:19,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 211 transitions, 4049 flow. Second operand has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:19,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:19,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:19,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:20,124 INFO L129 PetriNetUnfolder]: 255/666 cut-off events. [2021-03-12 00:33:20,125 INFO L130 PetriNetUnfolder]: For 6677/6715 co-relation queries the response was YES. [2021-03-12 00:33:20,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5809 conditions, 666 events. 255/666 cut-off events. For 6677/6715 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4488 event pairs, 13 based on Foata normal form. 13/678 useless extension candidates. Maximal degree in co-relation 5726. Up to 286 conditions per place. [2021-03-12 00:33:20,130 INFO L132 encePairwiseOnDemand]: 41/51 looper letters, 73 selfloop transitions, 146 changer transitions 0/228 dead transitions. [2021-03-12 00:33:20,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 228 transitions, 4832 flow [2021-03-12 00:33:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:33:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:33:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 277 transitions. [2021-03-12 00:33:20,132 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6034858387799564 [2021-03-12 00:33:20,132 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 277 transitions. [2021-03-12 00:33:20,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 277 transitions. [2021-03-12 00:33:20,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:20,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 277 transitions. [2021-03-12 00:33:20,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.77777777777778) internal successors, (277), 9 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:20,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:20,134 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:20,134 INFO L185 Difference]: Start difference. First operand has 84 places, 211 transitions, 4049 flow. Second operand 9 states and 277 transitions. [2021-03-12 00:33:20,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 228 transitions, 4832 flow [2021-03-12 00:33:20,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 228 transitions, 4644 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-03-12 00:33:20,168 INFO L241 Difference]: Finished difference. Result has 89 places, 222 transitions, 4443 flow [2021-03-12 00:33:20,169 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3882, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4443, PETRI_PLACES=89, PETRI_TRANSITIONS=222} [2021-03-12 00:33:20,169 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 57 predicate places. [2021-03-12 00:33:20,169 INFO L480 AbstractCegarLoop]: Abstraction has has 89 places, 222 transitions, 4443 flow [2021-03-12 00:33:20,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:20,169 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:20,169 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:20,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-12 00:33:20,169 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:20,170 INFO L82 PathProgramCache]: Analyzing trace with hash 764950140, now seen corresponding path program 16 times [2021-03-12 00:33:20,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:20,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063880419] [2021-03-12 00:33:20,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:20,179 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,179 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:20,182 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,182 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:20,187 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:20,191 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,192 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:20,192 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:20,193 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:20,194 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,194 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:20,199 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:20,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063880419] [2021-03-12 00:33:20,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:20,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:33:20,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654255848] [2021-03-12 00:33:20,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:33:20,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:20,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:33:20,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:33:20,201 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:20,201 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 222 transitions, 4443 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:20,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:20,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:20,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:20,365 INFO L129 PetriNetUnfolder]: 252/675 cut-off events. [2021-03-12 00:33:20,365 INFO L130 PetriNetUnfolder]: For 8419/8457 co-relation queries the response was YES. [2021-03-12 00:33:20,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6062 conditions, 675 events. 252/675 cut-off events. For 8419/8457 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 4616 event pairs, 22 based on Foata normal form. 22/696 useless extension candidates. Maximal degree in co-relation 5973. Up to 253 conditions per place. [2021-03-12 00:33:20,371 INFO L132 encePairwiseOnDemand]: 41/51 looper letters, 71 selfloop transitions, 160 changer transitions 0/240 dead transitions. [2021-03-12 00:33:20,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 240 transitions, 5148 flow [2021-03-12 00:33:20,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:33:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:33:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-12 00:33:20,372 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6143790849673203 [2021-03-12 00:33:20,372 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-12 00:33:20,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-12 00:33:20,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:20,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-12 00:33:20,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:20,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:20,374 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:20,374 INFO L185 Difference]: Start difference. First operand has 89 places, 222 transitions, 4443 flow. Second operand 6 states and 188 transitions. [2021-03-12 00:33:20,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 240 transitions, 5148 flow [2021-03-12 00:33:20,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 240 transitions, 4923 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-03-12 00:33:20,404 INFO L241 Difference]: Finished difference. Result has 92 places, 228 transitions, 4769 flow [2021-03-12 00:33:20,404 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4221, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4769, PETRI_PLACES=92, PETRI_TRANSITIONS=228} [2021-03-12 00:33:20,404 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 60 predicate places. [2021-03-12 00:33:20,405 INFO L480 AbstractCegarLoop]: Abstraction has has 92 places, 228 transitions, 4769 flow [2021-03-12 00:33:20,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:20,405 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:20,405 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:20,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-12 00:33:20,405 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:20,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:20,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2100872700, now seen corresponding path program 17 times [2021-03-12 00:33:20,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:20,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828247409] [2021-03-12 00:33:20,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:20,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:20,418 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,418 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:20,422 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,422 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:20,427 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,427 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:20,428 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,428 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:20,429 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,429 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:20,434 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,435 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:20,440 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,440 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:20,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828247409] [2021-03-12 00:33:20,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:20,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-12 00:33:20,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749050957] [2021-03-12 00:33:20,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:33:20,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:20,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:33:20,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:33:20,442 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:20,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 228 transitions, 4769 flow. Second operand has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:20,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:20,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:20,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:20,653 INFO L129 PetriNetUnfolder]: 247/675 cut-off events. [2021-03-12 00:33:20,653 INFO L130 PetriNetUnfolder]: For 8139/8175 co-relation queries the response was YES. [2021-03-12 00:33:20,655 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6535 conditions, 675 events. 247/675 cut-off events. For 8139/8175 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 4665 event pairs, 18 based on Foata normal form. 28/702 useless extension candidates. Maximal degree in co-relation 6447. Up to 385 conditions per place. [2021-03-12 00:33:20,658 INFO L132 encePairwiseOnDemand]: 41/51 looper letters, 106 selfloop transitions, 126 changer transitions 9/250 dead transitions. [2021-03-12 00:33:20,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 250 transitions, 5676 flow [2021-03-12 00:33:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:33:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:33:20,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2021-03-12 00:33:20,660 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6151960784313726 [2021-03-12 00:33:20,660 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 251 transitions. [2021-03-12 00:33:20,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 251 transitions. [2021-03-12 00:33:20,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:20,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 251 transitions. [2021-03-12 00:33:20,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 31.375) internal successors, (251), 8 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:20,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 51.0) internal successors, (459), 9 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:20,662 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 51.0) internal successors, (459), 9 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:20,662 INFO L185 Difference]: Start difference. First operand has 92 places, 228 transitions, 4769 flow. Second operand 8 states and 251 transitions. [2021-03-12 00:33:20,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 250 transitions, 5676 flow [2021-03-12 00:33:20,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 250 transitions, 5427 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-03-12 00:33:20,699 INFO L241 Difference]: Finished difference. Result has 97 places, 232 transitions, 4929 flow [2021-03-12 00:33:20,699 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4929, PETRI_PLACES=97, PETRI_TRANSITIONS=232} [2021-03-12 00:33:20,699 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 65 predicate places. [2021-03-12 00:33:20,700 INFO L480 AbstractCegarLoop]: Abstraction has has 97 places, 232 transitions, 4929 flow [2021-03-12 00:33:20,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:20,700 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:20,700 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:20,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-03-12 00:33:20,700 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:20,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:20,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1879554770, now seen corresponding path program 18 times [2021-03-12 00:33:20,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:20,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135769901] [2021-03-12 00:33:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:20,712 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,712 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:20,715 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:20,720 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,720 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:20,724 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,724 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:20,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:20,729 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,729 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:20,730 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,731 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:20,737 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:20,738 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:20,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135769901] [2021-03-12 00:33:20,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:20,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-12 00:33:20,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082047796] [2021-03-12 00:33:20,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:33:20,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:20,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:33:20,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:33:20,739 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:20,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 232 transitions, 4929 flow. Second operand has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:20,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:20,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:20,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:20,955 INFO L129 PetriNetUnfolder]: 236/667 cut-off events. [2021-03-12 00:33:20,955 INFO L130 PetriNetUnfolder]: For 8602/8640 co-relation queries the response was YES. [2021-03-12 00:33:20,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6488 conditions, 667 events. 236/667 cut-off events. For 8602/8640 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 4690 event pairs, 1 based on Foata normal form. 12/678 useless extension candidates. Maximal degree in co-relation 6397. Up to 257 conditions per place. [2021-03-12 00:33:20,962 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 31 selfloop transitions, 206 changer transitions 3/249 dead transitions. [2021-03-12 00:33:20,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 249 transitions, 5650 flow [2021-03-12 00:33:20,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 00:33:20,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-12 00:33:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2021-03-12 00:33:20,964 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6218487394957983 [2021-03-12 00:33:20,964 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 222 transitions. [2021-03-12 00:33:20,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 222 transitions. [2021-03-12 00:33:20,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:20,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 222 transitions. [2021-03-12 00:33:20,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:20,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 51.0) internal successors, (408), 8 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:20,967 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 51.0) internal successors, (408), 8 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:20,967 INFO L185 Difference]: Start difference. First operand has 97 places, 232 transitions, 4929 flow. Second operand 7 states and 222 transitions. [2021-03-12 00:33:20,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 249 transitions, 5650 flow [2021-03-12 00:33:21,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 249 transitions, 5472 flow, removed 17 selfloop flow, removed 5 redundant places. [2021-03-12 00:33:21,005 INFO L241 Difference]: Finished difference. Result has 98 places, 232 transitions, 5181 flow [2021-03-12 00:33:21,005 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4763, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5181, PETRI_PLACES=98, PETRI_TRANSITIONS=232} [2021-03-12 00:33:21,006 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 66 predicate places. [2021-03-12 00:33:21,006 INFO L480 AbstractCegarLoop]: Abstraction has has 98 places, 232 transitions, 5181 flow [2021-03-12 00:33:21,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:21,006 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:21,006 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:21,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-03-12 00:33:21,006 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:21,007 INFO L82 PathProgramCache]: Analyzing trace with hash -669016578, now seen corresponding path program 19 times [2021-03-12 00:33:21,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:21,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441590297] [2021-03-12 00:33:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:21,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:21,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,027 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,035 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,036 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,041 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,041 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,050 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:21,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441590297] [2021-03-12 00:33:21,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:21,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-12 00:33:21,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151450376] [2021-03-12 00:33:21,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:33:21,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:21,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:33:21,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:33:21,053 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:21,053 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 232 transitions, 5181 flow. Second operand has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:21,053 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:21,053 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:21,053 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:21,286 INFO L129 PetriNetUnfolder]: 216/645 cut-off events. [2021-03-12 00:33:21,286 INFO L130 PetriNetUnfolder]: For 8893/8925 co-relation queries the response was YES. [2021-03-12 00:33:21,289 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6494 conditions, 645 events. 216/645 cut-off events. For 8893/8925 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 4644 event pairs, 16 based on Foata normal form. 29/673 useless extension candidates. Maximal degree in co-relation 6406. Up to 362 conditions per place. [2021-03-12 00:33:21,292 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 106 selfloop transitions, 130 changer transitions 10/255 dead transitions. [2021-03-12 00:33:21,292 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 255 transitions, 6091 flow [2021-03-12 00:33:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:33:21,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:33:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 253 transitions. [2021-03-12 00:33:21,293 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6200980392156863 [2021-03-12 00:33:21,293 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 253 transitions. [2021-03-12 00:33:21,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 253 transitions. [2021-03-12 00:33:21,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:21,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 253 transitions. [2021-03-12 00:33:21,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 31.625) internal successors, (253), 8 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:21,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 51.0) internal successors, (459), 9 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:21,295 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 51.0) internal successors, (459), 9 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:21,295 INFO L185 Difference]: Start difference. First operand has 98 places, 232 transitions, 5181 flow. Second operand 8 states and 253 transitions. [2021-03-12 00:33:21,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 255 transitions, 6091 flow [2021-03-12 00:33:21,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 255 transitions, 5751 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-03-12 00:33:21,337 INFO L241 Difference]: Finished difference. Result has 100 places, 232 transitions, 5082 flow [2021-03-12 00:33:21,337 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4707, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5082, PETRI_PLACES=100, PETRI_TRANSITIONS=232} [2021-03-12 00:33:21,337 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 68 predicate places. [2021-03-12 00:33:21,337 INFO L480 AbstractCegarLoop]: Abstraction has has 100 places, 232 transitions, 5082 flow [2021-03-12 00:33:21,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:21,338 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:21,338 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:21,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-03-12 00:33:21,338 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:21,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:21,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1273809778, now seen corresponding path program 20 times [2021-03-12 00:33:21,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:21,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491913234] [2021-03-12 00:33:21,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:21,361 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:21,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,369 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,373 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,378 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,379 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,379 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,379 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,380 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,380 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,385 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,385 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:21,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491913234] [2021-03-12 00:33:21,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:21,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-12 00:33:21,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441386296] [2021-03-12 00:33:21,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:33:21,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:21,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:33:21,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:33:21,387 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:21,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 232 transitions, 5082 flow. Second operand has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:21,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:21,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:21,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:21,579 INFO L129 PetriNetUnfolder]: 209/633 cut-off events. [2021-03-12 00:33:21,579 INFO L130 PetriNetUnfolder]: For 8231/8263 co-relation queries the response was YES. [2021-03-12 00:33:21,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6213 conditions, 633 events. 209/633 cut-off events. For 8231/8263 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 4571 event pairs, 16 based on Foata normal form. 9/641 useless extension candidates. Maximal degree in co-relation 6126. Up to 279 conditions per place. [2021-03-12 00:33:21,585 INFO L132 encePairwiseOnDemand]: 41/51 looper letters, 75 selfloop transitions, 151 changer transitions 8/243 dead transitions. [2021-03-12 00:33:21,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 243 transitions, 5705 flow [2021-03-12 00:33:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:33:21,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:33:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 248 transitions. [2021-03-12 00:33:21,587 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2021-03-12 00:33:21,588 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 248 transitions. [2021-03-12 00:33:21,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 248 transitions. [2021-03-12 00:33:21,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:21,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 248 transitions. [2021-03-12 00:33:21,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:21,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 51.0) internal successors, (459), 9 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:21,591 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 51.0) internal successors, (459), 9 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:21,591 INFO L185 Difference]: Start difference. First operand has 100 places, 232 transitions, 5082 flow. Second operand 8 states and 248 transitions. [2021-03-12 00:33:21,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 243 transitions, 5705 flow [2021-03-12 00:33:21,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 243 transitions, 5664 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-12 00:33:21,627 INFO L241 Difference]: Finished difference. Result has 106 places, 232 transitions, 5352 flow [2021-03-12 00:33:21,628 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5041, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5352, PETRI_PLACES=106, PETRI_TRANSITIONS=232} [2021-03-12 00:33:21,628 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 74 predicate places. [2021-03-12 00:33:21,628 INFO L480 AbstractCegarLoop]: Abstraction has has 106 places, 232 transitions, 5352 flow [2021-03-12 00:33:21,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:21,628 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:21,628 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:21,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-03-12 00:33:21,628 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:21,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:21,629 INFO L82 PathProgramCache]: Analyzing trace with hash 508919082, now seen corresponding path program 21 times [2021-03-12 00:33:21,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:21,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37920844] [2021-03-12 00:33:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:21,653 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,653 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:21,656 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,656 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,659 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:21,664 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,665 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,672 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:21,673 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,676 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,681 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,681 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:21,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37920844] [2021-03-12 00:33:21,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:21,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:33:21,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444817174] [2021-03-12 00:33:21,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:33:21,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:21,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:33:21,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:33:21,685 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:21,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 232 transitions, 5352 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:21,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:21,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:21,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:21,850 INFO L129 PetriNetUnfolder]: 189/597 cut-off events. [2021-03-12 00:33:21,851 INFO L130 PetriNetUnfolder]: For 10288/10322 co-relation queries the response was YES. [2021-03-12 00:33:21,856 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6223 conditions, 597 events. 189/597 cut-off events. For 10288/10322 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4367 event pairs, 14 based on Foata normal form. 22/618 useless extension candidates. Maximal degree in co-relation 6138. Up to 233 conditions per place. [2021-03-12 00:33:21,859 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 67 selfloop transitions, 172 changer transitions 4/252 dead transitions. [2021-03-12 00:33:21,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 252 transitions, 6169 flow [2021-03-12 00:33:21,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:33:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:33:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-12 00:33:21,860 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6143790849673203 [2021-03-12 00:33:21,861 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-12 00:33:21,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-12 00:33:21,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:21,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-12 00:33:21,861 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) [2021-03-12 00:33:21,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:21,869 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:21,869 INFO L185 Difference]: Start difference. First operand has 106 places, 232 transitions, 5352 flow. Second operand 6 states and 188 transitions. [2021-03-12 00:33:21,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 252 transitions, 6169 flow [2021-03-12 00:33:21,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 252 transitions, 5965 flow, removed 10 selfloop flow, removed 6 redundant places. [2021-03-12 00:33:21,911 INFO L241 Difference]: Finished difference. Result has 106 places, 236 transitions, 5690 flow [2021-03-12 00:33:21,911 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5140, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5690, PETRI_PLACES=106, PETRI_TRANSITIONS=236} [2021-03-12 00:33:21,911 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 74 predicate places. [2021-03-12 00:33:21,911 INFO L480 AbstractCegarLoop]: Abstraction has has 106 places, 236 transitions, 5690 flow [2021-03-12 00:33:21,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:21,912 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:21,912 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:21,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-03-12 00:33:21,912 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:21,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:21,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1859002324, now seen corresponding path program 22 times [2021-03-12 00:33:21,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:21,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661863344] [2021-03-12 00:33:21,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:21,933 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,934 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:21,937 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,937 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,940 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,941 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:21,945 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,946 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,951 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,951 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,951 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,951 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:21,957 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:21,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:21,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661863344] [2021-03-12 00:33:21,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:21,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-12 00:33:21,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053374692] [2021-03-12 00:33:21,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:33:21,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:21,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:33:21,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:33:21,958 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:21,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 236 transitions, 5690 flow. Second operand has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:21,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:21,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:21,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:22,145 INFO L129 PetriNetUnfolder]: 179/589 cut-off events. [2021-03-12 00:33:22,145 INFO L130 PetriNetUnfolder]: For 9551/9585 co-relation queries the response was YES. [2021-03-12 00:33:22,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6308 conditions, 589 events. 179/589 cut-off events. For 9551/9585 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4358 event pairs, 1 based on Foata normal form. 12/600 useless extension candidates. Maximal degree in co-relation 6223. Up to 227 conditions per place. [2021-03-12 00:33:22,151 INFO L132 encePairwiseOnDemand]: 41/51 looper letters, 26 selfloop transitions, 196 changer transitions 12/243 dead transitions. [2021-03-12 00:33:22,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 243 transitions, 6267 flow [2021-03-12 00:33:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 00:33:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-12 00:33:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 219 transitions. [2021-03-12 00:33:22,152 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6134453781512605 [2021-03-12 00:33:22,152 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 219 transitions. [2021-03-12 00:33:22,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 219 transitions. [2021-03-12 00:33:22,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:22,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 219 transitions. [2021-03-12 00:33:22,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 31.285714285714285) internal successors, (219), 7 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:22,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 51.0) internal successors, (408), 8 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:22,153 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 51.0) internal successors, (408), 8 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:22,153 INFO L185 Difference]: Start difference. First operand has 106 places, 236 transitions, 5690 flow. Second operand 7 states and 219 transitions. [2021-03-12 00:33:22,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 243 transitions, 6267 flow [2021-03-12 00:33:22,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 243 transitions, 6062 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-12 00:33:22,197 INFO L241 Difference]: Finished difference. Result has 110 places, 226 transitions, 5729 flow [2021-03-12 00:33:22,198 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5453, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5729, PETRI_PLACES=110, PETRI_TRANSITIONS=226} [2021-03-12 00:33:22,198 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 78 predicate places. [2021-03-12 00:33:22,198 INFO L480 AbstractCegarLoop]: Abstraction has has 110 places, 226 transitions, 5729 flow [2021-03-12 00:33:22,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:22,198 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:22,198 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:22,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-03-12 00:33:22,198 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:22,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:22,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1336901402, now seen corresponding path program 23 times [2021-03-12 00:33:22,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:22,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048588845] [2021-03-12 00:33:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:22,213 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,213 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:22,216 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,216 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,219 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,219 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:22,223 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,223 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,224 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,224 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,235 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,235 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,240 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:22,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048588845] [2021-03-12 00:33:22,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:22,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:33:22,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965944394] [2021-03-12 00:33:22,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:33:22,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:22,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:33:22,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:33:22,245 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:22,245 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 226 transitions, 5729 flow. Second operand has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:22,245 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:22,245 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:22,245 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:22,458 INFO L129 PetriNetUnfolder]: 169/559 cut-off events. [2021-03-12 00:33:22,458 INFO L130 PetriNetUnfolder]: For 10329/10365 co-relation queries the response was YES. [2021-03-12 00:33:22,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6256 conditions, 559 events. 169/559 cut-off events. For 10329/10365 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4060 event pairs, 1 based on Foata normal form. 9/567 useless extension candidates. Maximal degree in co-relation 6170. Up to 214 conditions per place. [2021-03-12 00:33:22,463 INFO L132 encePairwiseOnDemand]: 41/51 looper letters, 29 selfloop transitions, 188 changer transitions 11/237 dead transitions. [2021-03-12 00:33:22,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 237 transitions, 6357 flow [2021-03-12 00:33:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:33:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:33:22,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 281 transitions. [2021-03-12 00:33:22,465 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6122004357298475 [2021-03-12 00:33:22,465 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 281 transitions. [2021-03-12 00:33:22,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 281 transitions. [2021-03-12 00:33:22,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:22,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 281 transitions. [2021-03-12 00:33:22,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 31.22222222222222) internal successors, (281), 9 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:22,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:22,466 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:22,466 INFO L185 Difference]: Start difference. First operand has 110 places, 226 transitions, 5729 flow. Second operand 9 states and 281 transitions. [2021-03-12 00:33:22,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 237 transitions, 6357 flow [2021-03-12 00:33:22,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 237 transitions, 5836 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-03-12 00:33:22,508 INFO L241 Difference]: Finished difference. Result has 111 places, 218 transitions, 5500 flow [2021-03-12 00:33:22,508 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5224, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5500, PETRI_PLACES=111, PETRI_TRANSITIONS=218} [2021-03-12 00:33:22,508 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 79 predicate places. [2021-03-12 00:33:22,508 INFO L480 AbstractCegarLoop]: Abstraction has has 111 places, 218 transitions, 5500 flow [2021-03-12 00:33:22,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:22,509 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:22,509 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:22,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-03-12 00:33:22,509 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:22,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:22,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1310467594, now seen corresponding path program 24 times [2021-03-12 00:33:22,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:22,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580584754] [2021-03-12 00:33:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:22,519 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,519 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:22,522 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,522 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,525 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,526 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,530 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,530 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,536 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,536 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,542 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,543 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,549 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,549 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:22,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580584754] [2021-03-12 00:33:22,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:22,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:33:22,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070152548] [2021-03-12 00:33:22,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:33:22,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:22,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:33:22,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:33:22,551 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:22,551 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 218 transitions, 5500 flow. Second operand has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:22,551 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:22,551 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:22,551 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:22,764 INFO L129 PetriNetUnfolder]: 162/546 cut-off events. [2021-03-12 00:33:22,765 INFO L130 PetriNetUnfolder]: For 9578/9614 co-relation queries the response was YES. [2021-03-12 00:33:22,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5973 conditions, 546 events. 162/546 cut-off events. For 9578/9614 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 3955 event pairs, 17 based on Foata normal form. 9/554 useless extension candidates. Maximal degree in co-relation 5889. Up to 222 conditions per place. [2021-03-12 00:33:22,770 INFO L132 encePairwiseOnDemand]: 41/51 looper letters, 66 selfloop transitions, 133 changer transitions 19/227 dead transitions. [2021-03-12 00:33:22,771 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 227 transitions, 6093 flow [2021-03-12 00:33:22,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:33:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:33:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 280 transitions. [2021-03-12 00:33:22,772 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6100217864923747 [2021-03-12 00:33:22,772 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 280 transitions. [2021-03-12 00:33:22,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 280 transitions. [2021-03-12 00:33:22,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:22,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 280 transitions. [2021-03-12 00:33:22,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 31.11111111111111) internal successors, (280), 9 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:22,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:22,773 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:22,773 INFO L185 Difference]: Start difference. First operand has 111 places, 218 transitions, 5500 flow. Second operand 9 states and 280 transitions. [2021-03-12 00:33:22,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 227 transitions, 6093 flow [2021-03-12 00:33:22,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 227 transitions, 5480 flow, removed 4 selfloop flow, removed 11 redundant places. [2021-03-12 00:33:22,815 INFO L241 Difference]: Finished difference. Result has 109 places, 202 transitions, 4683 flow [2021-03-12 00:33:22,815 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4899, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4683, PETRI_PLACES=109, PETRI_TRANSITIONS=202} [2021-03-12 00:33:22,816 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 77 predicate places. [2021-03-12 00:33:22,816 INFO L480 AbstractCegarLoop]: Abstraction has has 109 places, 202 transitions, 4683 flow [2021-03-12 00:33:22,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:22,816 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:22,816 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:22,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-03-12 00:33:22,816 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:22,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:22,817 INFO L82 PathProgramCache]: Analyzing trace with hash -479877130, now seen corresponding path program 25 times [2021-03-12 00:33:22,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:22,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448108374] [2021-03-12 00:33:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:22,835 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,835 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:22,838 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,838 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,841 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:22,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,852 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,852 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:22,864 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:22,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:22,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448108374] [2021-03-12 00:33:22,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:22,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:33:22,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967913954] [2021-03-12 00:33:22,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:33:22,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:22,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:33:22,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:33:22,866 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:22,867 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 202 transitions, 4683 flow. Second operand has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:22,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:22,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:22,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:23,069 INFO L129 PetriNetUnfolder]: 149/521 cut-off events. [2021-03-12 00:33:23,069 INFO L130 PetriNetUnfolder]: For 8414/8448 co-relation queries the response was YES. [2021-03-12 00:33:23,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5278 conditions, 521 events. 149/521 cut-off events. For 8414/8448 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3786 event pairs, 1 based on Foata normal form. 9/529 useless extension candidates. Maximal degree in co-relation 5195. Up to 201 conditions per place. [2021-03-12 00:33:23,074 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 32 selfloop transitions, 175 changer transitions 6/222 dead transitions. [2021-03-12 00:33:23,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 222 transitions, 5398 flow [2021-03-12 00:33:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:33:23,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:33:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 281 transitions. [2021-03-12 00:33:23,075 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6122004357298475 [2021-03-12 00:33:23,076 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 281 transitions. [2021-03-12 00:33:23,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 281 transitions. [2021-03-12 00:33:23,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:23,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 281 transitions. [2021-03-12 00:33:23,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 31.22222222222222) internal successors, (281), 9 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,077 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,077 INFO L185 Difference]: Start difference. First operand has 109 places, 202 transitions, 4683 flow. Second operand 9 states and 281 transitions. [2021-03-12 00:33:23,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 222 transitions, 5398 flow [2021-03-12 00:33:23,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 222 transitions, 4991 flow, removed 7 selfloop flow, removed 10 redundant places. [2021-03-12 00:33:23,112 INFO L241 Difference]: Finished difference. Result has 107 places, 202 transitions, 4650 flow [2021-03-12 00:33:23,112 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4650, PETRI_PLACES=107, PETRI_TRANSITIONS=202} [2021-03-12 00:33:23,113 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 75 predicate places. [2021-03-12 00:33:23,113 INFO L480 AbstractCegarLoop]: Abstraction has has 107 places, 202 transitions, 4650 flow [2021-03-12 00:33:23,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,113 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:23,113 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:23,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-03-12 00:33:23,113 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:23,114 INFO L82 PathProgramCache]: Analyzing trace with hash 981874816, now seen corresponding path program 26 times [2021-03-12 00:33:23,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:23,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273815864] [2021-03-12 00:33:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:23,128 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,128 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:23,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,134 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,134 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:23,139 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,139 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,139 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,144 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,144 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,156 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:23,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273815864] [2021-03-12 00:33:23,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:23,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:33:23,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862351476] [2021-03-12 00:33:23,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:33:23,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:23,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:33:23,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:33:23,158 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:23,158 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 202 transitions, 4650 flow. Second operand has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:23,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:23,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:23,358 INFO L129 PetriNetUnfolder]: 143/515 cut-off events. [2021-03-12 00:33:23,358 INFO L130 PetriNetUnfolder]: For 8076/8110 co-relation queries the response was YES. [2021-03-12 00:33:23,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5215 conditions, 515 events. 143/515 cut-off events. For 8076/8110 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3799 event pairs, 1 based on Foata normal form. 13/527 useless extension candidates. Maximal degree in co-relation 5136. Up to 202 conditions per place. [2021-03-12 00:33:23,363 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 32 selfloop transitions, 165 changer transitions 14/220 dead transitions. [2021-03-12 00:33:23,363 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 220 transitions, 5326 flow [2021-03-12 00:33:23,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:33:23,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:33:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 282 transitions. [2021-03-12 00:33:23,364 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6143790849673203 [2021-03-12 00:33:23,364 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 282 transitions. [2021-03-12 00:33:23,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 282 transitions. [2021-03-12 00:33:23,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:23,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 282 transitions. [2021-03-12 00:33:23,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 31.333333333333332) internal successors, (282), 9 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,365 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,365 INFO L185 Difference]: Start difference. First operand has 107 places, 202 transitions, 4650 flow. Second operand 9 states and 282 transitions. [2021-03-12 00:33:23,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 220 transitions, 5326 flow [2021-03-12 00:33:23,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 220 transitions, 5166 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-12 00:33:23,396 INFO L241 Difference]: Finished difference. Result has 111 places, 192 transitions, 4597 flow [2021-03-12 00:33:23,396 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4460, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4597, PETRI_PLACES=111, PETRI_TRANSITIONS=192} [2021-03-12 00:33:23,396 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 79 predicate places. [2021-03-12 00:33:23,396 INFO L480 AbstractCegarLoop]: Abstraction has has 111 places, 192 transitions, 4597 flow [2021-03-12 00:33:23,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,396 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:23,397 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:23,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-03-12 00:33:23,397 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:23,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:23,397 INFO L82 PathProgramCache]: Analyzing trace with hash 295623396, now seen corresponding path program 27 times [2021-03-12 00:33:23,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:23,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103236004] [2021-03-12 00:33:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:23,405 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,406 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:23,408 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,409 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,412 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,416 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,416 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,421 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,422 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,422 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,422 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,422 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,428 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,428 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:23,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103236004] [2021-03-12 00:33:23,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:23,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-12 00:33:23,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142936931] [2021-03-12 00:33:23,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:33:23,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:23,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:33:23,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:33:23,429 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:23,430 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 192 transitions, 4597 flow. Second operand has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:23,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:23,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:23,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:23,587 INFO L129 PetriNetUnfolder]: 115/405 cut-off events. [2021-03-12 00:33:23,587 INFO L130 PetriNetUnfolder]: For 7530/7566 co-relation queries the response was YES. [2021-03-12 00:33:23,589 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4231 conditions, 405 events. 115/405 cut-off events. For 7530/7566 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2686 event pairs, 10 based on Foata normal form. 9/413 useless extension candidates. Maximal degree in co-relation 4152. Up to 150 conditions per place. [2021-03-12 00:33:23,591 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 61 selfloop transitions, 131 changer transitions 1/202 dead transitions. [2021-03-12 00:33:23,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 202 transitions, 5106 flow [2021-03-12 00:33:23,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:33:23,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:33:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 252 transitions. [2021-03-12 00:33:23,592 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6176470588235294 [2021-03-12 00:33:23,592 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 252 transitions. [2021-03-12 00:33:23,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 252 transitions. [2021-03-12 00:33:23,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:23,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 252 transitions. [2021-03-12 00:33:23,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 31.5) internal successors, (252), 8 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 51.0) internal successors, (459), 9 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,594 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 51.0) internal successors, (459), 9 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,594 INFO L185 Difference]: Start difference. First operand has 111 places, 192 transitions, 4597 flow. Second operand 8 states and 252 transitions. [2021-03-12 00:33:23,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 202 transitions, 5106 flow [2021-03-12 00:33:23,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 202 transitions, 5024 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-12 00:33:23,629 INFO L241 Difference]: Finished difference. Result has 115 places, 194 transitions, 4808 flow [2021-03-12 00:33:23,630 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4478, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4808, PETRI_PLACES=115, PETRI_TRANSITIONS=194} [2021-03-12 00:33:23,630 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 83 predicate places. [2021-03-12 00:33:23,630 INFO L480 AbstractCegarLoop]: Abstraction has has 115 places, 194 transitions, 4808 flow [2021-03-12 00:33:23,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:23,630 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:23,630 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:23,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-03-12 00:33:23,631 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:23,631 INFO L82 PathProgramCache]: Analyzing trace with hash 519320660, now seen corresponding path program 28 times [2021-03-12 00:33:23,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:23,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133474172] [2021-03-12 00:33:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:23,645 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:23,647 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,660 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,660 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,671 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,671 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,677 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,678 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,685 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:23,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133474172] [2021-03-12 00:33:23,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:23,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-12 00:33:23,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399573535] [2021-03-12 00:33:23,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-12 00:33:23,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:23,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-12 00:33:23,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-12 00:33:23,687 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:23,687 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 194 transitions, 4808 flow. Second operand has 9 states, 9 states have (on average 26.11111111111111) internal successors, (235), 9 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,687 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:23,687 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:23,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:23,910 INFO L129 PetriNetUnfolder]: 113/413 cut-off events. [2021-03-12 00:33:23,910 INFO L130 PetriNetUnfolder]: For 8288/8326 co-relation queries the response was YES. [2021-03-12 00:33:23,911 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4422 conditions, 413 events. 113/413 cut-off events. For 8288/8326 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2798 event pairs, 10 based on Foata normal form. 12/424 useless extension candidates. Maximal degree in co-relation 4343. Up to 153 conditions per place. [2021-03-12 00:33:23,913 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 66 selfloop transitions, 125 changer transitions 13/213 dead transitions. [2021-03-12 00:33:23,913 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 213 transitions, 5509 flow [2021-03-12 00:33:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-12 00:33:23,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-03-12 00:33:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 367 transitions. [2021-03-12 00:33:23,914 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5996732026143791 [2021-03-12 00:33:23,914 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 367 transitions. [2021-03-12 00:33:23,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 367 transitions. [2021-03-12 00:33:23,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:23,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 367 transitions. [2021-03-12 00:33:23,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 30.583333333333332) internal successors, (367), 12 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,916 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,916 INFO L185 Difference]: Start difference. First operand has 115 places, 194 transitions, 4808 flow. Second operand 12 states and 367 transitions. [2021-03-12 00:33:23,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 213 transitions, 5509 flow [2021-03-12 00:33:23,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 213 transitions, 5370 flow, removed 2 selfloop flow, removed 4 redundant places. [2021-03-12 00:33:23,947 INFO L241 Difference]: Finished difference. Result has 122 places, 188 transitions, 4686 flow [2021-03-12 00:33:23,947 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4674, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4686, PETRI_PLACES=122, PETRI_TRANSITIONS=188} [2021-03-12 00:33:23,947 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 90 predicate places. [2021-03-12 00:33:23,947 INFO L480 AbstractCegarLoop]: Abstraction has has 122 places, 188 transitions, 4686 flow [2021-03-12 00:33:23,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 26.11111111111111) internal successors, (235), 9 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,947 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:23,948 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:23,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-03-12 00:33:23,948 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:23,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:23,948 INFO L82 PathProgramCache]: Analyzing trace with hash 389321246, now seen corresponding path program 29 times [2021-03-12 00:33:23,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:23,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223433267] [2021-03-12 00:33:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:23,956 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:23,959 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,959 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,963 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,968 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,968 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,974 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,976 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,981 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,988 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:23,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:23,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:23,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223433267] [2021-03-12 00:33:23,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:23,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-12 00:33:23,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042147477] [2021-03-12 00:33:23,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-12 00:33:23,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-12 00:33:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-12 00:33:23,997 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:23,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 188 transitions, 4686 flow. Second operand has 9 states, 9 states have (on average 26.11111111111111) internal successors, (235), 9 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:23,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:23,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:23,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:24,222 INFO L129 PetriNetUnfolder]: 106/399 cut-off events. [2021-03-12 00:33:24,222 INFO L130 PetriNetUnfolder]: For 7927/7965 co-relation queries the response was YES. [2021-03-12 00:33:24,224 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4291 conditions, 399 events. 106/399 cut-off events. For 7927/7965 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2699 event pairs, 10 based on Foata normal form. 9/407 useless extension candidates. Maximal degree in co-relation 4212. Up to 146 conditions per place. [2021-03-12 00:33:24,225 INFO L132 encePairwiseOnDemand]: 41/51 looper letters, 59 selfloop transitions, 106 changer transitions 22/196 dead transitions. [2021-03-12 00:33:24,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 196 transitions, 5172 flow [2021-03-12 00:33:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-12 00:33:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-03-12 00:33:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 361 transitions. [2021-03-12 00:33:24,227 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5898692810457516 [2021-03-12 00:33:24,227 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 361 transitions. [2021-03-12 00:33:24,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 361 transitions. [2021-03-12 00:33:24,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:24,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 361 transitions. [2021-03-12 00:33:24,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 30.083333333333332) internal successors, (361), 12 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,229 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,229 INFO L185 Difference]: Start difference. First operand has 122 places, 188 transitions, 4686 flow. Second operand 12 states and 361 transitions. [2021-03-12 00:33:24,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 196 transitions, 5172 flow [2021-03-12 00:33:24,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 196 transitions, 4953 flow, removed 1 selfloop flow, removed 6 redundant places. [2021-03-12 00:33:24,260 INFO L241 Difference]: Finished difference. Result has 128 places, 169 transitions, 4197 flow [2021-03-12 00:33:24,260 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4475, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4197, PETRI_PLACES=128, PETRI_TRANSITIONS=169} [2021-03-12 00:33:24,262 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 96 predicate places. [2021-03-12 00:33:24,262 INFO L480 AbstractCegarLoop]: Abstraction has has 128 places, 169 transitions, 4197 flow [2021-03-12 00:33:24,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 26.11111111111111) internal successors, (235), 9 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,263 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:24,263 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:24,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-03-12 00:33:24,264 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:24,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:24,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1591350662, now seen corresponding path program 30 times [2021-03-12 00:33:24,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:24,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320217861] [2021-03-12 00:33:24,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:24,277 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,277 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:24,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,280 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,283 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,283 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,288 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,288 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,293 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,293 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,300 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,300 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,306 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,306 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,313 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:24,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320217861] [2021-03-12 00:33:24,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:24,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-12 00:33:24,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592793082] [2021-03-12 00:33:24,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-12 00:33:24,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:24,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-12 00:33:24,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-12 00:33:24,314 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:24,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 169 transitions, 4197 flow. Second operand has 9 states, 9 states have (on average 26.11111111111111) internal successors, (235), 9 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:24,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:24,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:24,547 INFO L129 PetriNetUnfolder]: 95/376 cut-off events. [2021-03-12 00:33:24,547 INFO L130 PetriNetUnfolder]: For 7174/7210 co-relation queries the response was YES. [2021-03-12 00:33:24,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4085 conditions, 376 events. 95/376 cut-off events. For 7174/7210 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2551 event pairs, 10 based on Foata normal form. 15/390 useless extension candidates. Maximal degree in co-relation 4005. Up to 138 conditions per place. [2021-03-12 00:33:24,550 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 62 selfloop transitions, 96 changer transitions 18/185 dead transitions. [2021-03-12 00:33:24,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 185 transitions, 4824 flow [2021-03-12 00:33:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-12 00:33:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-03-12 00:33:24,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 363 transitions. [2021-03-12 00:33:24,551 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5931372549019608 [2021-03-12 00:33:24,551 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 363 transitions. [2021-03-12 00:33:24,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 363 transitions. [2021-03-12 00:33:24,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:24,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 363 transitions. [2021-03-12 00:33:24,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 30.25) internal successors, (363), 12 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,553 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,553 INFO L185 Difference]: Start difference. First operand has 128 places, 169 transitions, 4197 flow. Second operand 12 states and 363 transitions. [2021-03-12 00:33:24,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 185 transitions, 4824 flow [2021-03-12 00:33:24,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 185 transitions, 4545 flow, removed 17 selfloop flow, removed 9 redundant places. [2021-03-12 00:33:24,602 INFO L241 Difference]: Finished difference. Result has 125 places, 158 transitions, 3790 flow [2021-03-12 00:33:24,602 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3904, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3790, PETRI_PLACES=125, PETRI_TRANSITIONS=158} [2021-03-12 00:33:24,603 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 93 predicate places. [2021-03-12 00:33:24,603 INFO L480 AbstractCegarLoop]: Abstraction has has 125 places, 158 transitions, 3790 flow [2021-03-12 00:33:24,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 26.11111111111111) internal successors, (235), 9 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,603 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:24,603 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:24,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-03-12 00:33:24,603 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:24,604 INFO L82 PathProgramCache]: Analyzing trace with hash 904264264, now seen corresponding path program 31 times [2021-03-12 00:33:24,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:24,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467390589] [2021-03-12 00:33:24,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:24,623 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,624 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:24,626 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,629 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,630 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,634 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,634 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,640 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,640 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,645 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:24,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467390589] [2021-03-12 00:33:24,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:24,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:33:24,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035926259] [2021-03-12 00:33:24,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:33:24,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:24,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:33:24,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:33:24,653 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:24,653 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 158 transitions, 3790 flow. Second operand has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:24,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:24,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:24,797 INFO L129 PetriNetUnfolder]: 68/292 cut-off events. [2021-03-12 00:33:24,798 INFO L130 PetriNetUnfolder]: For 5549/5555 co-relation queries the response was YES. [2021-03-12 00:33:24,799 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3010 conditions, 292 events. 68/292 cut-off events. For 5549/5555 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1876 event pairs, 10 based on Foata normal form. 18/310 useless extension candidates. Maximal degree in co-relation 2934. Up to 122 conditions per place. [2021-03-12 00:33:24,800 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 56 selfloop transitions, 73 changer transitions 10/148 dead transitions. [2021-03-12 00:33:24,800 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 148 transitions, 3691 flow [2021-03-12 00:33:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:33:24,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:33:24,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 272 transitions. [2021-03-12 00:33:24,801 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2021-03-12 00:33:24,801 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 272 transitions. [2021-03-12 00:33:24,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 272 transitions. [2021-03-12 00:33:24,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:24,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 272 transitions. [2021-03-12 00:33:24,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.22222222222222) internal successors, (272), 9 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,802 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,803 INFO L185 Difference]: Start difference. First operand has 125 places, 158 transitions, 3790 flow. Second operand 9 states and 272 transitions. [2021-03-12 00:33:24,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 148 transitions, 3691 flow [2021-03-12 00:33:24,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 148 transitions, 3564 flow, removed 5 selfloop flow, removed 5 redundant places. [2021-03-12 00:33:24,825 INFO L241 Difference]: Finished difference. Result has 128 places, 135 transitions, 3101 flow [2021-03-12 00:33:24,825 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3190, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3101, PETRI_PLACES=128, PETRI_TRANSITIONS=135} [2021-03-12 00:33:24,825 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 96 predicate places. [2021-03-12 00:33:24,825 INFO L480 AbstractCegarLoop]: Abstraction has has 128 places, 135 transitions, 3101 flow [2021-03-12 00:33:24,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,826 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:24,826 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:24,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-03-12 00:33:24,826 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:24,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:24,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1355196488, now seen corresponding path program 32 times [2021-03-12 00:33:24,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:24,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423318141] [2021-03-12 00:33:24,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:24,834 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:24,837 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,840 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:24,845 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,845 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,845 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,845 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:24,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:24,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423318141] [2021-03-12 00:33:24,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:24,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:33:24,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685140330] [2021-03-12 00:33:24,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-12 00:33:24,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:24,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-12 00:33:24,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-12 00:33:24,853 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:24,853 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 135 transitions, 3101 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,853 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:24,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:24,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:24,943 INFO L129 PetriNetUnfolder]: 50/238 cut-off events. [2021-03-12 00:33:24,943 INFO L130 PetriNetUnfolder]: For 4108/4108 co-relation queries the response was YES. [2021-03-12 00:33:24,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2481 conditions, 238 events. 50/238 cut-off events. For 4108/4108 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1449 event pairs, 4 based on Foata normal form. 11/249 useless extension candidates. Maximal degree in co-relation 2409. Up to 89 conditions per place. [2021-03-12 00:33:24,945 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 39 selfloop transitions, 65 changer transitions 9/122 dead transitions. [2021-03-12 00:33:24,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 122 transitions, 3065 flow [2021-03-12 00:33:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-12 00:33:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-12 00:33:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2021-03-12 00:33:24,946 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2021-03-12 00:33:24,946 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 186 transitions. [2021-03-12 00:33:24,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 186 transitions. [2021-03-12 00:33:24,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:24,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 186 transitions. [2021-03-12 00:33:24,947 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) [2021-03-12 00:33:24,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,948 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,948 INFO L185 Difference]: Start difference. First operand has 128 places, 135 transitions, 3101 flow. Second operand 6 states and 186 transitions. [2021-03-12 00:33:24,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 122 transitions, 3065 flow [2021-03-12 00:33:24,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 122 transitions, 2830 flow, removed 1 selfloop flow, removed 20 redundant places. [2021-03-12 00:33:24,966 INFO L241 Difference]: Finished difference. Result has 114 places, 111 transitions, 2608 flow [2021-03-12 00:33:24,966 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2608, PETRI_PLACES=114, PETRI_TRANSITIONS=111} [2021-03-12 00:33:24,967 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 82 predicate places. [2021-03-12 00:33:24,967 INFO L480 AbstractCegarLoop]: Abstraction has has 114 places, 111 transitions, 2608 flow [2021-03-12 00:33:24,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:24,967 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:24,967 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:24,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-03-12 00:33:24,967 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:24,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1145706400, now seen corresponding path program 33 times [2021-03-12 00:33:24,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:24,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887740881] [2021-03-12 00:33:24,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:24,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:24,981 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,985 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,985 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,990 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:24,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:24,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,002 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:25,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887740881] [2021-03-12 00:33:25,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:25,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:33:25,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306132932] [2021-03-12 00:33:25,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:33:25,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:25,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:33:25,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:33:25,009 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:25,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 111 transitions, 2608 flow. Second operand has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:25,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:25,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:25,123 INFO L129 PetriNetUnfolder]: 23/131 cut-off events. [2021-03-12 00:33:25,123 INFO L130 PetriNetUnfolder]: For 3462/3466 co-relation queries the response was YES. [2021-03-12 00:33:25,124 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1587 conditions, 131 events. 23/131 cut-off events. For 3462/3466 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 653 event pairs, 2 based on Foata normal form. 17/148 useless extension candidates. Maximal degree in co-relation 1539. Up to 44 conditions per place. [2021-03-12 00:33:25,124 INFO L132 encePairwiseOnDemand]: 43/51 looper letters, 20 selfloop transitions, 19 changer transitions 34/82 dead transitions. [2021-03-12 00:33:25,124 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 82 transitions, 2077 flow [2021-03-12 00:33:25,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:33:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:33:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2021-03-12 00:33:25,125 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5773420479302832 [2021-03-12 00:33:25,125 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 265 transitions. [2021-03-12 00:33:25,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 265 transitions. [2021-03-12 00:33:25,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:25,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 265 transitions. [2021-03-12 00:33:25,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 29.444444444444443) internal successors, (265), 9 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,128 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,128 INFO L185 Difference]: Start difference. First operand has 114 places, 111 transitions, 2608 flow. Second operand 9 states and 265 transitions. [2021-03-12 00:33:25,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 82 transitions, 2077 flow [2021-03-12 00:33:25,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 82 transitions, 1806 flow, removed 7 selfloop flow, removed 17 redundant places. [2021-03-12 00:33:25,140 INFO L241 Difference]: Finished difference. Result has 103 places, 47 transitions, 781 flow [2021-03-12 00:33:25,141 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=781, PETRI_PLACES=103, PETRI_TRANSITIONS=47} [2021-03-12 00:33:25,142 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 71 predicate places. [2021-03-12 00:33:25,142 INFO L480 AbstractCegarLoop]: Abstraction has has 103 places, 47 transitions, 781 flow [2021-03-12 00:33:25,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,142 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:25,142 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:25,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-03-12 00:33:25,142 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:25,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:25,143 INFO L82 PathProgramCache]: Analyzing trace with hash -145890380, now seen corresponding path program 34 times [2021-03-12 00:33:25,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:25,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289158502] [2021-03-12 00:33:25,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:25,164 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,165 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:25,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,171 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:25,175 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,175 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,175 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,176 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,180 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,180 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,185 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,186 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:25,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289158502] [2021-03-12 00:33:25,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:25,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-12 00:33:25,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258610097] [2021-03-12 00:33:25,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:33:25,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:25,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:33:25,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:33:25,187 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:25,188 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 47 transitions, 781 flow. Second operand has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:25,188 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:25,188 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:25,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:25,240 INFO L129 PetriNetUnfolder]: 7/53 cut-off events. [2021-03-12 00:33:25,240 INFO L130 PetriNetUnfolder]: For 683/685 co-relation queries the response was YES. [2021-03-12 00:33:25,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 53 events. 7/53 cut-off events. For 683/685 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 134 event pairs, 0 based on Foata normal form. 4/57 useless extension candidates. Maximal degree in co-relation 371. Up to 18 conditions per place. [2021-03-12 00:33:25,240 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 5 selfloop transitions, 21 changer transitions 10/45 dead transitions. [2021-03-12 00:33:25,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 45 transitions, 803 flow [2021-03-12 00:33:25,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 00:33:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-12 00:33:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2021-03-12 00:33:25,241 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5630252100840336 [2021-03-12 00:33:25,241 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 201 transitions. [2021-03-12 00:33:25,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 201 transitions. [2021-03-12 00:33:25,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:25,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 201 transitions. [2021-03-12 00:33:25,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 28.714285714285715) internal successors, (201), 7 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 51.0) internal successors, (408), 8 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,247 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 51.0) internal successors, (408), 8 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,247 INFO L185 Difference]: Start difference. First operand has 103 places, 47 transitions, 781 flow. Second operand 7 states and 201 transitions. [2021-03-12 00:33:25,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 45 transitions, 803 flow [2021-03-12 00:33:25,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 45 transitions, 485 flow, removed 10 selfloop flow, removed 39 redundant places. [2021-03-12 00:33:25,251 INFO L241 Difference]: Finished difference. Result has 58 places, 34 transitions, 329 flow [2021-03-12 00:33:25,251 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=329, PETRI_PLACES=58, PETRI_TRANSITIONS=34} [2021-03-12 00:33:25,251 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 26 predicate places. [2021-03-12 00:33:25,251 INFO L480 AbstractCegarLoop]: Abstraction has has 58 places, 34 transitions, 329 flow [2021-03-12 00:33:25,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 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) [2021-03-12 00:33:25,251 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:25,251 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:25,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-03-12 00:33:25,252 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:25,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:25,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1989777276, now seen corresponding path program 35 times [2021-03-12 00:33:25,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:25,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041999719] [2021-03-12 00:33:25,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:25,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:25,266 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,266 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,269 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:33:25,273 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,273 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,278 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,283 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,283 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,289 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:25,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041999719] [2021-03-12 00:33:25,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:25,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:33:25,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320766065] [2021-03-12 00:33:25,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:33:25,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:25,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:33:25,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:33:25,290 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:25,291 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 34 transitions, 329 flow. Second operand has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,291 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:25,291 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:25,291 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:25,350 INFO L129 PetriNetUnfolder]: 2/36 cut-off events. [2021-03-12 00:33:25,350 INFO L130 PetriNetUnfolder]: For 167/169 co-relation queries the response was YES. [2021-03-12 00:33:25,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 36 events. 2/36 cut-off events. For 167/169 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 3/39 useless extension candidates. Maximal degree in co-relation 173. Up to 11 conditions per place. [2021-03-12 00:33:25,350 INFO L132 encePairwiseOnDemand]: 43/51 looper letters, 4 selfloop transitions, 11 changer transitions 9/33 dead transitions. [2021-03-12 00:33:25,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 33 transitions, 361 flow [2021-03-12 00:33:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:33:25,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:33:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2021-03-12 00:33:25,352 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2021-03-12 00:33:25,352 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 221 transitions. [2021-03-12 00:33:25,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 221 transitions. [2021-03-12 00:33:25,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:25,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 221 transitions. [2021-03-12 00:33:25,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 27.625) internal successors, (221), 8 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 51.0) internal successors, (459), 9 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,353 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 51.0) internal successors, (459), 9 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,354 INFO L185 Difference]: Start difference. First operand has 58 places, 34 transitions, 329 flow. Second operand 8 states and 221 transitions. [2021-03-12 00:33:25,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 33 transitions, 361 flow [2021-03-12 00:33:25,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 33 transitions, 251 flow, removed 3 selfloop flow, removed 16 redundant places. [2021-03-12 00:33:25,355 INFO L241 Difference]: Finished difference. Result has 49 places, 24 transitions, 152 flow [2021-03-12 00:33:25,355 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=152, PETRI_PLACES=49, PETRI_TRANSITIONS=24} [2021-03-12 00:33:25,355 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2021-03-12 00:33:25,355 INFO L480 AbstractCegarLoop]: Abstraction has has 49 places, 24 transitions, 152 flow [2021-03-12 00:33:25,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 26.25) internal successors, (210), 8 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,355 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:33:25,355 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:33:25,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-03-12 00:33:25,355 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:33:25,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:33:25,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1262358600, now seen corresponding path program 36 times [2021-03-12 00:33:25,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:33:25,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228818869] [2021-03-12 00:33:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:33:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:33:25,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,364 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:33:25,366 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,366 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,370 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,370 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,374 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,379 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,379 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,384 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,384 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,389 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:33:25,396 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:33:25,396 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:33:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:33:25,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228818869] [2021-03-12 00:33:25,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:33:25,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-12 00:33:25,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621534042] [2021-03-12 00:33:25,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-12 00:33:25,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:33:25,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-12 00:33:25,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-12 00:33:25,398 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 51 [2021-03-12 00:33:25,398 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 24 transitions, 152 flow. Second operand has 9 states, 9 states have (on average 26.11111111111111) internal successors, (235), 9 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,398 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:33:25,398 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 51 [2021-03-12 00:33:25,398 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:33:25,449 INFO L129 PetriNetUnfolder]: 1/18 cut-off events. [2021-03-12 00:33:25,450 INFO L130 PetriNetUnfolder]: For 52/54 co-relation queries the response was YES. [2021-03-12 00:33:25,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 18 events. 1/18 cut-off events. For 52/54 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 3/21 useless extension candidates. Maximal degree in co-relation 16. Up to 5 conditions per place. [2021-03-12 00:33:25,450 INFO L132 encePairwiseOnDemand]: 43/51 looper letters, 0 selfloop transitions, 0 changer transitions 17/17 dead transitions. [2021-03-12 00:33:25,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 17 transitions, 156 flow [2021-03-12 00:33:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:33:25,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:33:25,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2021-03-12 00:33:25,452 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2021-03-12 00:33:25,452 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 238 transitions. [2021-03-12 00:33:25,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 238 transitions. [2021-03-12 00:33:25,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:33:25,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 238 transitions. [2021-03-12 00:33:25,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 26.444444444444443) internal successors, (238), 9 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,453 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 51.0) internal successors, (510), 10 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,453 INFO L185 Difference]: Start difference. First operand has 49 places, 24 transitions, 152 flow. Second operand 9 states and 238 transitions. [2021-03-12 00:33:25,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 17 transitions, 156 flow [2021-03-12 00:33:25,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 17 transitions, 95 flow, removed 0 selfloop flow, removed 17 redundant places. [2021-03-12 00:33:25,454 INFO L241 Difference]: Finished difference. Result has 33 places, 0 transitions, 0 flow [2021-03-12 00:33:25,454 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=33, PETRI_TRANSITIONS=0} [2021-03-12 00:33:25,454 INFO L335 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2021-03-12 00:33:25,454 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 0 transitions, 0 flow [2021-03-12 00:33:25,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 26.11111111111111) internal successors, (235), 9 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:33:25,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-03-12 00:33:25,458 INFO L202 PluginConnector]: Adding new model ticket-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.03 12:33:25 BasicIcfg [2021-03-12 00:33:25,458 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-12 00:33:25,458 INFO L168 Benchmark]: Toolchain (without parser) took 10755.53 ms. Allocated memory was 255.9 MB in the beginning and 534.8 MB in the end (delta: 278.9 MB). Free memory was 236.2 MB in the beginning and 301.7 MB in the end (delta: -65.5 MB). Peak memory consumption was 212.9 MB. Max. memory is 16.0 GB. [2021-03-12 00:33:25,458 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.5 MB in the beginning and 237.3 MB in the end (delta: 157.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-12 00:33:25,459 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.95 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-12 00:33:25,459 INFO L168 Benchmark]: Boogie Preprocessor took 24.65 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 233.3 MB in the end (delta: 916.9 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-03-12 00:33:25,459 INFO L168 Benchmark]: RCFGBuilder took 259.78 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 236.0 MB in the end (delta: -2.7 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.0 GB. [2021-03-12 00:33:25,459 INFO L168 Benchmark]: TraceAbstraction took 10440.27 ms. Allocated memory was 255.9 MB in the beginning and 534.8 MB in the end (delta: 278.9 MB). Free memory was 235.3 MB in the beginning and 301.7 MB in the end (delta: -66.4 MB). Peak memory consumption was 212.4 MB. Max. memory is 16.0 GB. [2021-03-12 00:33:25,459 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.5 MB in the beginning and 237.3 MB in the end (delta: 157.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.95 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.65 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 233.3 MB in the end (delta: 916.9 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 259.78 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 236.0 MB in the end (delta: -2.7 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 10440.27 ms. Allocated memory was 255.9 MB in the beginning and 534.8 MB in the end (delta: 278.9 MB). Free memory was 235.3 MB in the beginning and 301.7 MB in the end (delta: -66.4 MB). Peak memory consumption was 212.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1053.1ms, 45 PlacesBefore, 32 PlacesAfterwards, 32 TransitionsBefore, 19 TransitionsAfterwards, 456 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 12 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 13 TotalNumberOfCompositions, 668 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 443, positive: 411, positive conditional: 0, positive unconditional: 411, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 334, positive: 308, positive conditional: 0, positive unconditional: 308, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 334, positive: 271, positive conditional: 0, positive unconditional: 271, negative: 63, negative conditional: 0, negative unconditional: 63, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 63, positive: 37, positive conditional: 0, positive unconditional: 37, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 329, positive: 217, positive conditional: 0, positive unconditional: 217, negative: 113, negative conditional: 0, negative unconditional: 113, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 443, positive: 103, positive conditional: 0, positive unconditional: 103, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 334, unknown conditional: 0, unknown unconditional: 334] , Statistics on independence cache: Total cache size (in pairs): 67, Positive cache size: 55, Positive conditional cache size: 0, Positive unconditional cache size: 55, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12 - PositiveResult [Line: 80]: 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, 39 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 12.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 10356.0ms, OverallIterations: 36, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 7347.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1118.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 63 SDtfs, 108 SDslu, 7 SDs, 0 SdLazy, 4055 SolverSat, 780 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2084.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 325 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1138.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5729occurred in iteration=22, InterpolantAutomatonStates: 271, 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: 46.9ms SsaConstructionTime, 231.9ms SatisfiabilityAnalysisTime, 1334.5ms InterpolantComputationTime, 684 NumberOfCodeBlocks, 684 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 648 ConstructedInterpolants, 0 QuantifiedInterpolants, 1903 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 36 InterpolantComputations, 36 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...