/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-13 08:31:48,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-13 08:31:48,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-13 08:31:48,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-13 08:31:48,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-13 08:31:48,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-13 08:31:48,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-13 08:31:48,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-13 08:31:48,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-13 08:31:48,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-13 08:31:48,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-13 08:31:48,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-13 08:31:48,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-13 08:31:48,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-13 08:31:48,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-13 08:31:48,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-13 08:31:48,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-13 08:31:48,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-13 08:31:48,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-13 08:31:48,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-13 08:31:48,353 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-06-13 08:31:48,389 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-13 08:31:48,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-13 08:31:48,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-13 08:31:48,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-13 08:31:48,392 INFO L138 SettingsManager]: * Use SBE=true [2021-06-13 08:31:48,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-13 08:31:48,392 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-13 08:31:48,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-13 08:31:48,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-13 08:31:48,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-13 08:31:48,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-13 08:31:48,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-13 08:31:48,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-13 08:31:48,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-13 08:31:48,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-13 08:31:48,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-13 08:31:48,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-13 08:31:48,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-13 08:31:48,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-13 08:31:48,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-13 08:31:48,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-13 08:31:48,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 08:31:48,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-13 08:31:48,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-13 08:31:48,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-13 08:31:48,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-13 08:31:48,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-13 08:31:48,397 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-13 08:31:48,397 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-13 08:31:48,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-13 08:31:48,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-13 08:31:48,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-13 08:31:48,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-13 08:31:48,732 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-13 08:31:48,732 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-13 08:31:48,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl [2021-06-13 08:31:48,733 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl' [2021-06-13 08:31:48,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-13 08:31:48,765 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-13 08:31:48,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-13 08:31:48,766 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-13 08:31:48,766 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-13 08:31:48,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:31:48" (1/1) ... [2021-06-13 08:31:48,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:31:48" (1/1) ... [2021-06-13 08:31:48,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-13 08:31:48,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-13 08:31:48,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-13 08:31:48,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-13 08:31:48,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:31:48" (1/1) ... [2021-06-13 08:31:48,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:31:48" (1/1) ... [2021-06-13 08:31:48,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:31:48" (1/1) ... [2021-06-13 08:31:48,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:31:48" (1/1) ... [2021-06-13 08:31:48,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:31:48" (1/1) ... [2021-06-13 08:31:48,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:31:48" (1/1) ... [2021-06-13 08:31:48,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:31:48" (1/1) ... [2021-06-13 08:31:48,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-13 08:31:48,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-13 08:31:48,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-13 08:31:48,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-13 08:31:48,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:31:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 08:31:48,883 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-06-13 08:31:48,883 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-06-13 08:31:48,884 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-06-13 08:31:48,885 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2021-06-13 08:31:48,885 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2021-06-13 08:31:48,885 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2021-06-13 08:31:48,885 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_3 given in one single declaration [2021-06-13 08:31:48,885 INFO L130 BoogieDeclarations]: Found specification of procedure set_3 [2021-06-13 08:31:48,885 INFO L138 BoogieDeclarations]: Found implementation of procedure set_3 [2021-06-13 08:31:48,885 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-06-13 08:31:48,886 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-06-13 08:31:48,886 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-06-13 08:31:48,886 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-13 08:31:48,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-13 08:31:48,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-13 08:31:48,887 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-13 08:31:49,045 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-13 08:31:49,046 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-13 08:31:49,048 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 08:31:49 BoogieIcfgContainer [2021-06-13 08:31:49,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-13 08:31:49,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-13 08:31:49,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-13 08:31:49,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-13 08:31:49,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:31:48" (1/2) ... [2021-06-13 08:31:49,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4393b8e8 and model type example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 08:31:49, skipping insertion in model container [2021-06-13 08:31:49,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 08:31:49" (2/2) ... [2021-06-13 08:31:49,056 INFO L111 eAbstractionObserver]: Analyzing ICFG example_4.bpl [2021-06-13 08:31:49,065 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-13 08:31:49,065 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-13 08:31:49,066 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-13 08:31:49,118 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2021-06-13 08:31:49,137 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-13 08:31:49,156 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 08:31:49,156 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 08:31:49,156 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 08:31:49,156 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 08:31:49,156 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 08:31:49,156 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 08:31:49,156 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 08:31:49,157 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-13 08:31:49,165 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 35 transitions, 138 flow [2021-06-13 08:31:49,193 INFO L129 PetriNetUnfolder]: 17/47 cut-off events. [2021-06-13 08:31:49,193 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-13 08:31:49,196 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 47 events. 17/47 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 124 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 41. Up to 12 conditions per place. [2021-06-13 08:31:49,196 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 35 transitions, 138 flow [2021-06-13 08:31:49,201 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 29 transitions, 118 flow [2021-06-13 08:31:49,236 INFO L129 PetriNetUnfolder]: 17/44 cut-off events. [2021-06-13 08:31:49,236 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-13 08:31:49,236 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:49,237 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:49,237 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:49,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:49,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1438249779, now seen corresponding path program 1 times [2021-06-13 08:31:49,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:49,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9728983] [2021-06-13 08:31:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:49,418 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:49,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:49,432 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:49,433 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 08:31:49,451 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:49,452 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:49,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:49,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9728983] [2021-06-13 08:31:49,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9728983] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:49,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:49,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-13 08:31:49,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492068796] [2021-06-13 08:31:49,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 08:31:49,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:49,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 08:31:49,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 08:31:49,503 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2021-06-13 08:31:49,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:49,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2021-06-13 08:31:49,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:49,555 INFO L129 PetriNetUnfolder]: 14/41 cut-off events. [2021-06-13 08:31:49,556 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2021-06-13 08:31:49,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 41 events. 14/41 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 87 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 39. Up to 12 conditions per place. [2021-06-13 08:31:49,558 INFO L132 encePairwiseOnDemand]: 33/35 looper letters, 3 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2021-06-13 08:31:49,558 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 121 flow [2021-06-13 08:31:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 08:31:49,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 08:31:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2021-06-13 08:31:49,575 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-06-13 08:31:49,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2021-06-13 08:31:49,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2021-06-13 08:31:49,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:49,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2021-06-13 08:31:49,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,591 INFO L185 Difference]: Start difference. First operand has 30 places, 29 transitions, 118 flow. Second operand 3 states and 95 transitions. [2021-06-13 08:31:49,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 121 flow [2021-06-13 08:31:49,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 28 transitions, 83 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-06-13 08:31:49,600 INFO L241 Difference]: Finished difference. Result has 24 places, 28 transitions, 77 flow [2021-06-13 08:31:49,601 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=24, PETRI_TRANSITIONS=28} [2021-06-13 08:31:49,602 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, -6 predicate places. [2021-06-13 08:31:49,602 INFO L482 AbstractCegarLoop]: Abstraction has has 24 places, 28 transitions, 77 flow [2021-06-13 08:31:49,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,602 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:49,603 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:49,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-13 08:31:49,603 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:49,605 INFO L82 PathProgramCache]: Analyzing trace with hash 899557645, now seen corresponding path program 1 times [2021-06-13 08:31:49,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:49,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837668647] [2021-06-13 08:31:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:49,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:49,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:49,644 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:49,644 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 08:31:49,659 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:49,660 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:49,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:49,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837668647] [2021-06-13 08:31:49,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837668647] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:49,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:49,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-13 08:31:49,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244512457] [2021-06-13 08:31:49,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 08:31:49,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:49,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 08:31:49,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 08:31:49,664 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2021-06-13 08:31:49,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 28 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:49,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2021-06-13 08:31:49,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:49,693 INFO L129 PetriNetUnfolder]: 6/29 cut-off events. [2021-06-13 08:31:49,693 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-06-13 08:31:49,693 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 29 events. 6/29 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs, 0 based on Foata normal form. 3/32 useless extension candidates. Maximal degree in co-relation 34. Up to 6 conditions per place. [2021-06-13 08:31:49,694 INFO L132 encePairwiseOnDemand]: 32/35 looper letters, 2 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2021-06-13 08:31:49,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 26 transitions, 77 flow [2021-06-13 08:31:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 08:31:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 08:31:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2021-06-13 08:31:49,700 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-06-13 08:31:49,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2021-06-13 08:31:49,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2021-06-13 08:31:49,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:49,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2021-06-13 08:31:49,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,703 INFO L185 Difference]: Start difference. First operand has 24 places, 28 transitions, 77 flow. Second operand 3 states and 95 transitions. [2021-06-13 08:31:49,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 26 transitions, 77 flow [2021-06-13 08:31:49,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 76 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-13 08:31:49,705 INFO L241 Difference]: Finished difference. Result has 25 places, 26 transitions, 72 flow [2021-06-13 08:31:49,710 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=26} [2021-06-13 08:31:49,710 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, -5 predicate places. [2021-06-13 08:31:49,710 INFO L482 AbstractCegarLoop]: Abstraction has has 25 places, 26 transitions, 72 flow [2021-06-13 08:31:49,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,711 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:49,711 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:49,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-13 08:31:49,711 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:49,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:49,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1999900173, now seen corresponding path program 1 times [2021-06-13 08:31:49,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:49,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612376897] [2021-06-13 08:31:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:49,796 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:49,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:49,804 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:49,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:49,819 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-13 08:31:49,820 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-13 08:31:49,839 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-13 08:31:49,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-13 08:31:49,872 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:49,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:49,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:49,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612376897] [2021-06-13 08:31:49,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612376897] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:49,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:49,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:49,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107993658] [2021-06-13 08:31:49,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:49,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:49,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:49,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:49,892 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:49,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 26 transitions, 72 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,892 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:49,892 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:49,892 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:49,950 INFO L129 PetriNetUnfolder]: 40/141 cut-off events. [2021-06-13 08:31:49,951 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:31:49,951 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 141 events. 40/141 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 711 event pairs, 5 based on Foata normal form. 1/136 useless extension candidates. Maximal degree in co-relation 182. Up to 27 conditions per place. [2021-06-13 08:31:49,952 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 9 selfloop transitions, 3 changer transitions 1/34 dead transitions. [2021-06-13 08:31:49,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 34 transitions, 114 flow [2021-06-13 08:31:49,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:49,954 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:49,954 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:49,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:49,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:49,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:49,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,958 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,958 INFO L185 Difference]: Start difference. First operand has 25 places, 26 transitions, 72 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:49,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 34 transitions, 114 flow [2021-06-13 08:31:49,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-13 08:31:49,960 INFO L241 Difference]: Finished difference. Result has 33 places, 28 transitions, 94 flow [2021-06-13 08:31:49,960 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=94, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2021-06-13 08:31:49,960 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2021-06-13 08:31:49,960 INFO L482 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 94 flow [2021-06-13 08:31:49,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,961 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:49,961 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:49,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-13 08:31:49,961 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:49,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:49,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1753622987, now seen corresponding path program 1 times [2021-06-13 08:31:49,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:49,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106297414] [2021-06-13 08:31:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:49,973 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:49,973 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:49,974 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:49,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 08:31:49,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:49,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:49,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:49,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106297414] [2021-06-13 08:31:49,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106297414] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:49,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:49,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-13 08:31:49,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846750459] [2021-06-13 08:31:49,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 08:31:49,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:49,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 08:31:49,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 08:31:49,981 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2021-06-13 08:31:49,981 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:49,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2021-06-13 08:31:49,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:49,991 INFO L129 PetriNetUnfolder]: 0/34 cut-off events. [2021-06-13 08:31:49,992 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-06-13 08:31:49,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 34 events. 0/34 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 84 event pairs, 0 based on Foata normal form. 6/37 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-13 08:31:49,992 INFO L132 encePairwiseOnDemand]: 31/35 looper letters, 1 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2021-06-13 08:31:49,992 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 19 transitions, 71 flow [2021-06-13 08:31:49,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 08:31:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 08:31:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2021-06-13 08:31:49,994 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-06-13 08:31:49,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2021-06-13 08:31:49,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2021-06-13 08:31:49,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:49,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2021-06-13 08:31:49,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,996 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,996 INFO L185 Difference]: Start difference. First operand has 33 places, 28 transitions, 94 flow. Second operand 3 states and 95 transitions. [2021-06-13 08:31:49,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 19 transitions, 71 flow [2021-06-13 08:31:49,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 19 transitions, 68 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-06-13 08:31:49,997 INFO L241 Difference]: Finished difference. Result has 32 places, 19 transitions, 66 flow [2021-06-13 08:31:49,997 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=32, PETRI_TRANSITIONS=19} [2021-06-13 08:31:49,998 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2021-06-13 08:31:49,998 INFO L482 AbstractCegarLoop]: Abstraction has has 32 places, 19 transitions, 66 flow [2021-06-13 08:31:49,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:49,998 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:49,998 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:49,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-13 08:31:49,999 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:49,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:49,999 INFO L82 PathProgramCache]: Analyzing trace with hash 2006901683, now seen corresponding path program 2 times [2021-06-13 08:31:49,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:49,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447279283] [2021-06-13 08:31:50,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:50,029 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:50,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:50,031 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:50,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:50,037 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:50,038 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:50,055 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-13 08:31:50,056 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-13 08:31:50,094 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:50,095 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:50,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:50,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447279283] [2021-06-13 08:31:50,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447279283] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:50,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:50,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:50,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770373688] [2021-06-13 08:31:50,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:50,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:50,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:50,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:50,121 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:50,121 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 19 transitions, 66 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,121 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:50,121 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:50,121 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:50,198 INFO L129 PetriNetUnfolder]: 13/103 cut-off events. [2021-06-13 08:31:50,198 INFO L130 PetriNetUnfolder]: For 40/45 co-relation queries the response was YES. [2021-06-13 08:31:50,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 103 events. 13/103 cut-off events. For 40/45 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 552 event pairs, 5 based on Foata normal form. 1/99 useless extension candidates. Maximal degree in co-relation 198. Up to 20 conditions per place. [2021-06-13 08:31:50,199 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 9 selfloop transitions, 5 changer transitions 1/27 dead transitions. [2021-06-13 08:31:50,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 27 transitions, 124 flow [2021-06-13 08:31:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:50,204 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:50,204 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:50,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:50,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:50,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:50,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,206 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,206 INFO L185 Difference]: Start difference. First operand has 32 places, 19 transitions, 66 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:50,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 27 transitions, 124 flow [2021-06-13 08:31:50,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 123 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-13 08:31:50,208 INFO L241 Difference]: Finished difference. Result has 40 places, 21 transitions, 99 flow [2021-06-13 08:31:50,208 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=99, PETRI_PLACES=40, PETRI_TRANSITIONS=21} [2021-06-13 08:31:50,208 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2021-06-13 08:31:50,208 INFO L482 AbstractCegarLoop]: Abstraction has has 40 places, 21 transitions, 99 flow [2021-06-13 08:31:50,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,209 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:50,209 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:50,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-13 08:31:50,209 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:50,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1279859681, now seen corresponding path program 3 times [2021-06-13 08:31:50,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:50,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780587687] [2021-06-13 08:31:50,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:50,257 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:50,258 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:50,259 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:50,259 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:50,265 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-13 08:31:50,266 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-13 08:31:50,276 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-13 08:31:50,277 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-13 08:31:50,310 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:50,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:50,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:50,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780587687] [2021-06-13 08:31:50,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780587687] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:50,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:50,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:50,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49961803] [2021-06-13 08:31:50,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:50,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:50,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:50,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:50,335 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:50,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 21 transitions, 99 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,335 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:50,335 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:50,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:50,413 INFO L129 PetriNetUnfolder]: 10/135 cut-off events. [2021-06-13 08:31:50,413 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2021-06-13 08:31:50,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 135 events. 10/135 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 875 event pairs, 4 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 303. Up to 24 conditions per place. [2021-06-13 08:31:50,416 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 11 selfloop transitions, 6 changer transitions 2/31 dead transitions. [2021-06-13 08:31:50,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 31 transitions, 201 flow [2021-06-13 08:31:50,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:50,418 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:50,418 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:50,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:50,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:50,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:50,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,422 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,422 INFO L185 Difference]: Start difference. First operand has 40 places, 21 transitions, 99 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:50,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 31 transitions, 201 flow [2021-06-13 08:31:50,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 31 transitions, 183 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-06-13 08:31:50,428 INFO L241 Difference]: Finished difference. Result has 46 places, 23 transitions, 134 flow [2021-06-13 08:31:50,428 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=46, PETRI_TRANSITIONS=23} [2021-06-13 08:31:50,428 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2021-06-13 08:31:50,429 INFO L482 AbstractCegarLoop]: Abstraction has has 46 places, 23 transitions, 134 flow [2021-06-13 08:31:50,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,429 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:50,429 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:50,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-13 08:31:50,429 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:50,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1743412525, now seen corresponding path program 4 times [2021-06-13 08:31:50,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:50,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147805358] [2021-06-13 08:31:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:50,489 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:50,490 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:50,493 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:50,494 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:50,502 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-13 08:31:50,504 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-13 08:31:50,524 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-13 08:31:50,526 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-13 08:31:50,558 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:50,559 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:50,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:50,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147805358] [2021-06-13 08:31:50,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147805358] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:50,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:50,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:50,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634757296] [2021-06-13 08:31:50,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:50,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:50,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:50,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:50,580 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:50,580 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 23 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:50,581 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:50,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:50,634 INFO L129 PetriNetUnfolder]: 10/130 cut-off events. [2021-06-13 08:31:50,635 INFO L130 PetriNetUnfolder]: For 257/264 co-relation queries the response was YES. [2021-06-13 08:31:50,636 INFO L84 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 130 events. 10/130 cut-off events. For 257/264 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 811 event pairs, 2 based on Foata normal form. 1/129 useless extension candidates. Maximal degree in co-relation 327. Up to 23 conditions per place. [2021-06-13 08:31:50,636 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 13 selfloop transitions, 7 changer transitions 3/35 dead transitions. [2021-06-13 08:31:50,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 35 transitions, 279 flow [2021-06-13 08:31:50,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:50,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:50,639 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:50,639 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:50,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:50,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:50,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:50,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,640 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,640 INFO L185 Difference]: Start difference. First operand has 46 places, 23 transitions, 134 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:50,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 35 transitions, 279 flow [2021-06-13 08:31:50,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 35 transitions, 256 flow, removed 8 selfloop flow, removed 3 redundant places. [2021-06-13 08:31:50,644 INFO L241 Difference]: Finished difference. Result has 51 places, 26 transitions, 187 flow [2021-06-13 08:31:50,644 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=51, PETRI_TRANSITIONS=26} [2021-06-13 08:31:50,645 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2021-06-13 08:31:50,645 INFO L482 AbstractCegarLoop]: Abstraction has has 51 places, 26 transitions, 187 flow [2021-06-13 08:31:50,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,645 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:50,645 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:50,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-13 08:31:50,645 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:50,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:50,646 INFO L82 PathProgramCache]: Analyzing trace with hash -916989789, now seen corresponding path program 5 times [2021-06-13 08:31:50,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:50,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350449923] [2021-06-13 08:31:50,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:50,669 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:50,669 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:50,670 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:50,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:50,676 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:50,677 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-13 08:31:50,689 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:50,691 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:50,707 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:50,708 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:50,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:50,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350449923] [2021-06-13 08:31:50,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350449923] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:50,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:50,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:50,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70317428] [2021-06-13 08:31:50,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:50,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:50,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:50,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:50,735 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:50,735 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 26 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,736 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:50,736 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:50,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:50,808 INFO L129 PetriNetUnfolder]: 6/151 cut-off events. [2021-06-13 08:31:50,808 INFO L130 PetriNetUnfolder]: For 421/426 co-relation queries the response was YES. [2021-06-13 08:31:50,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 151 events. 6/151 cut-off events. For 421/426 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1032 event pairs, 1 based on Foata normal form. 1/148 useless extension candidates. Maximal degree in co-relation 410. Up to 26 conditions per place. [2021-06-13 08:31:50,809 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 20 selfloop transitions, 6 changer transitions 3/41 dead transitions. [2021-06-13 08:31:50,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 41 transitions, 407 flow [2021-06-13 08:31:50,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:50,811 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:50,811 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:50,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:50,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:50,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:50,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,813 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,813 INFO L185 Difference]: Start difference. First operand has 51 places, 26 transitions, 187 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:50,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 41 transitions, 407 flow [2021-06-13 08:31:50,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 41 transitions, 381 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-06-13 08:31:50,817 INFO L241 Difference]: Finished difference. Result has 55 places, 30 transitions, 256 flow [2021-06-13 08:31:50,817 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=55, PETRI_TRANSITIONS=30} [2021-06-13 08:31:50,817 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2021-06-13 08:31:50,817 INFO L482 AbstractCegarLoop]: Abstraction has has 55 places, 30 transitions, 256 flow [2021-06-13 08:31:50,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,817 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:50,817 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:50,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-13 08:31:50,818 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:50,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:50,818 INFO L82 PathProgramCache]: Analyzing trace with hash 906155765, now seen corresponding path program 6 times [2021-06-13 08:31:50,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:50,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510002359] [2021-06-13 08:31:50,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:50,844 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:50,844 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:50,845 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:50,845 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:50,850 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-13 08:31:50,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-13 08:31:50,869 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:50,874 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:50,888 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:50,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:50,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:50,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510002359] [2021-06-13 08:31:50,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510002359] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:50,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:50,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:50,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891883061] [2021-06-13 08:31:50,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:50,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:50,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:50,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:50,908 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:50,908 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 30 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,908 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:50,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:50,908 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:50,973 INFO L129 PetriNetUnfolder]: 4/150 cut-off events. [2021-06-13 08:31:50,974 INFO L130 PetriNetUnfolder]: For 455/464 co-relation queries the response was YES. [2021-06-13 08:31:50,974 INFO L84 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 150 events. 4/150 cut-off events. For 455/464 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1043 event pairs, 2 based on Foata normal form. 3/152 useless extension candidates. Maximal degree in co-relation 425. Up to 26 conditions per place. [2021-06-13 08:31:50,974 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 13 selfloop transitions, 11 changer transitions 1/37 dead transitions. [2021-06-13 08:31:50,975 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 37 transitions, 367 flow [2021-06-13 08:31:50,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:50,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:50,976 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:50,976 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:50,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:50,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:50,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:50,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,977 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,977 INFO L185 Difference]: Start difference. First operand has 55 places, 30 transitions, 256 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:50,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 37 transitions, 367 flow [2021-06-13 08:31:50,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 37 transitions, 345 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-06-13 08:31:50,982 INFO L241 Difference]: Finished difference. Result has 58 places, 31 transitions, 287 flow [2021-06-13 08:31:50,983 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=58, PETRI_TRANSITIONS=31} [2021-06-13 08:31:50,983 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2021-06-13 08:31:50,983 INFO L482 AbstractCegarLoop]: Abstraction has has 58 places, 31 transitions, 287 flow [2021-06-13 08:31:50,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:50,983 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:50,983 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:50,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-13 08:31:50,983 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:50,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:50,984 INFO L82 PathProgramCache]: Analyzing trace with hash 2052165229, now seen corresponding path program 7 times [2021-06-13 08:31:50,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:50,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042267046] [2021-06-13 08:31:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:51,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:51,007 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,007 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:51,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,014 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-13 08:31:51,023 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:51,024 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:51,038 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:51,039 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:51,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:51,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042267046] [2021-06-13 08:31:51,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042267046] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:51,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:51,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:51,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24534432] [2021-06-13 08:31:51,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:51,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:51,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:51,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:51,055 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:51,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 31 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:51,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:51,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:51,117 INFO L129 PetriNetUnfolder]: 4/145 cut-off events. [2021-06-13 08:31:51,117 INFO L130 PetriNetUnfolder]: For 488/496 co-relation queries the response was YES. [2021-06-13 08:31:51,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 145 events. 4/145 cut-off events. For 488/496 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 989 event pairs, 2 based on Foata normal form. 2/146 useless extension candidates. Maximal degree in co-relation 431. Up to 24 conditions per place. [2021-06-13 08:31:51,118 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 16 selfloop transitions, 9 changer transitions 3/40 dead transitions. [2021-06-13 08:31:51,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 40 transitions, 438 flow [2021-06-13 08:31:51,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:51,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:51,119 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:51,119 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:51,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,122 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,122 INFO L185 Difference]: Start difference. First operand has 58 places, 31 transitions, 287 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:51,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 40 transitions, 438 flow [2021-06-13 08:31:51,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 40 transitions, 415 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-06-13 08:31:51,127 INFO L241 Difference]: Finished difference. Result has 62 places, 31 transitions, 304 flow [2021-06-13 08:31:51,128 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=304, PETRI_PLACES=62, PETRI_TRANSITIONS=31} [2021-06-13 08:31:51,128 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2021-06-13 08:31:51,128 INFO L482 AbstractCegarLoop]: Abstraction has has 62 places, 31 transitions, 304 flow [2021-06-13 08:31:51,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,128 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:51,128 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:51,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-13 08:31:51,128 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:51,129 INFO L82 PathProgramCache]: Analyzing trace with hash 457585365, now seen corresponding path program 8 times [2021-06-13 08:31:51,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:51,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223161886] [2021-06-13 08:31:51,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:51,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,156 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:51,156 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,157 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:51,165 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-13 08:31:51,177 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-13 08:31:51,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-13 08:31:51,197 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:51,197 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:51,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:51,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223161886] [2021-06-13 08:31:51,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223161886] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:51,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:51,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:51,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50462825] [2021-06-13 08:31:51,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:51,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:51,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:51,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:51,218 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:51,218 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 31 transitions, 304 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:51,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:51,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:51,274 INFO L129 PetriNetUnfolder]: 2/156 cut-off events. [2021-06-13 08:31:51,274 INFO L130 PetriNetUnfolder]: For 625/634 co-relation queries the response was YES. [2021-06-13 08:31:51,275 INFO L84 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 156 events. 2/156 cut-off events. For 625/634 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1110 event pairs, 2 based on Foata normal form. 1/155 useless extension candidates. Maximal degree in co-relation 485. Up to 26 conditions per place. [2021-06-13 08:31:51,275 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 19 selfloop transitions, 11 changer transitions 2/44 dead transitions. [2021-06-13 08:31:51,276 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 44 transitions, 541 flow [2021-06-13 08:31:51,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:51,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:51,277 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:51,277 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:51,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,278 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,279 INFO L185 Difference]: Start difference. First operand has 62 places, 31 transitions, 304 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:51,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 44 transitions, 541 flow [2021-06-13 08:31:51,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 44 transitions, 506 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-06-13 08:31:51,282 INFO L241 Difference]: Finished difference. Result has 65 places, 37 transitions, 431 flow [2021-06-13 08:31:51,283 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=431, PETRI_PLACES=65, PETRI_TRANSITIONS=37} [2021-06-13 08:31:51,283 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2021-06-13 08:31:51,283 INFO L482 AbstractCegarLoop]: Abstraction has has 65 places, 37 transitions, 431 flow [2021-06-13 08:31:51,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,283 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:51,283 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:51,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-13 08:31:51,284 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:51,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1379601457, now seen corresponding path program 9 times [2021-06-13 08:31:51,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:51,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473100730] [2021-06-13 08:31:51,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:51,297 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,298 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:51,299 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,299 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:51,304 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-13 08:31:51,317 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:51,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:51,335 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:51,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:51,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:51,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473100730] [2021-06-13 08:31:51,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473100730] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:51,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:51,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:51,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334487055] [2021-06-13 08:31:51,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:51,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:51,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:51,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:51,354 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:51,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 37 transitions, 431 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:51,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:51,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:51,426 INFO L129 PetriNetUnfolder]: 2/148 cut-off events. [2021-06-13 08:31:51,427 INFO L130 PetriNetUnfolder]: For 647/658 co-relation queries the response was YES. [2021-06-13 08:31:51,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 148 events. 2/148 cut-off events. For 647/658 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1011 event pairs, 2 based on Foata normal form. 4/151 useless extension candidates. Maximal degree in co-relation 485. Up to 25 conditions per place. [2021-06-13 08:31:51,427 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 15 selfloop transitions, 13 changer transitions 2/42 dead transitions. [2021-06-13 08:31:51,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 42 transitions, 535 flow [2021-06-13 08:31:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:51,429 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:51,429 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:51,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,430 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,430 INFO L185 Difference]: Start difference. First operand has 65 places, 37 transitions, 431 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:51,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 42 transitions, 535 flow [2021-06-13 08:31:51,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 42 transitions, 519 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-06-13 08:31:51,435 INFO L241 Difference]: Finished difference. Result has 69 places, 38 transitions, 473 flow [2021-06-13 08:31:51,435 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=473, PETRI_PLACES=69, PETRI_TRANSITIONS=38} [2021-06-13 08:31:51,435 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2021-06-13 08:31:51,435 INFO L482 AbstractCegarLoop]: Abstraction has has 69 places, 38 transitions, 473 flow [2021-06-13 08:31:51,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,435 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:51,435 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:51,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-13 08:31:51,436 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:51,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:51,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1284927229, now seen corresponding path program 10 times [2021-06-13 08:31:51,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:51,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892438047] [2021-06-13 08:31:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:51,463 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,464 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:51,464 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,465 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:51,470 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,470 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-13 08:31:51,479 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-13 08:31:51,480 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-13 08:31:51,498 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:51,501 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:51,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:51,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892438047] [2021-06-13 08:31:51,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892438047] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:51,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:51,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:51,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109457572] [2021-06-13 08:31:51,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:51,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:51,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:51,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:51,519 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:51,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 38 transitions, 473 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:51,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:51,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:51,560 INFO L129 PetriNetUnfolder]: 2/140 cut-off events. [2021-06-13 08:31:51,560 INFO L130 PetriNetUnfolder]: For 765/779 co-relation queries the response was YES. [2021-06-13 08:31:51,561 INFO L84 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 140 events. 2/140 cut-off events. For 765/779 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 948 event pairs, 2 based on Foata normal form. 6/145 useless extension candidates. Maximal degree in co-relation 488. Up to 25 conditions per place. [2021-06-13 08:31:51,561 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 12 selfloop transitions, 13 changer transitions 3/40 dead transitions. [2021-06-13 08:31:51,561 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 40 transitions, 537 flow [2021-06-13 08:31:51,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-06-13 08:31:51,562 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-06-13 08:31:51,562 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-06-13 08:31:51,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-06-13 08:31:51,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:51,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-06-13 08:31:51,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,564 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,564 INFO L185 Difference]: Start difference. First operand has 69 places, 38 transitions, 473 flow. Second operand 6 states and 187 transitions. [2021-06-13 08:31:51,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 40 transitions, 537 flow [2021-06-13 08:31:51,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 40 transitions, 518 flow, removed 5 selfloop flow, removed 2 redundant places. [2021-06-13 08:31:51,568 INFO L241 Difference]: Finished difference. Result has 72 places, 35 transitions, 435 flow [2021-06-13 08:31:51,568 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=435, PETRI_PLACES=72, PETRI_TRANSITIONS=35} [2021-06-13 08:31:51,568 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2021-06-13 08:31:51,568 INFO L482 AbstractCegarLoop]: Abstraction has has 72 places, 35 transitions, 435 flow [2021-06-13 08:31:51,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,568 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:51,569 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:51,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-13 08:31:51,569 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:51,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:51,569 INFO L82 PathProgramCache]: Analyzing trace with hash -425094623, now seen corresponding path program 11 times [2021-06-13 08:31:51,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:51,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372456875] [2021-06-13 08:31:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:51,581 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,581 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:51,582 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,582 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:51,588 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,588 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-13 08:31:51,597 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:51,598 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:51,612 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:51,612 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:51,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:51,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372456875] [2021-06-13 08:31:51,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372456875] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:51,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:51,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:51,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028976583] [2021-06-13 08:31:51,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:51,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:51,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:51,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:51,628 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:51,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 35 transitions, 435 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:51,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:51,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:51,690 INFO L129 PetriNetUnfolder]: 2/130 cut-off events. [2021-06-13 08:31:51,690 INFO L130 PetriNetUnfolder]: For 703/715 co-relation queries the response was YES. [2021-06-13 08:31:51,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 130 events. 2/130 cut-off events. For 703/715 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 850 event pairs, 2 based on Foata normal form. 5/134 useless extension candidates. Maximal degree in co-relation 462. Up to 23 conditions per place. [2021-06-13 08:31:51,691 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 14 selfloop transitions, 10 changer transitions 3/39 dead transitions. [2021-06-13 08:31:51,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 39 transitions, 534 flow [2021-06-13 08:31:51,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:51,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:51,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:51,699 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:51,699 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:51,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,701 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,701 INFO L185 Difference]: Start difference. First operand has 72 places, 35 transitions, 435 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:51,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 39 transitions, 534 flow [2021-06-13 08:31:51,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 39 transitions, 456 flow, removed 7 selfloop flow, removed 9 redundant places. [2021-06-13 08:31:51,707 INFO L241 Difference]: Finished difference. Result has 67 places, 34 transitions, 379 flow [2021-06-13 08:31:51,707 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=379, PETRI_PLACES=67, PETRI_TRANSITIONS=34} [2021-06-13 08:31:51,707 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2021-06-13 08:31:51,707 INFO L482 AbstractCegarLoop]: Abstraction has has 67 places, 34 transitions, 379 flow [2021-06-13 08:31:51,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,707 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:51,707 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:51,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-13 08:31:51,708 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:51,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1207725587, now seen corresponding path program 12 times [2021-06-13 08:31:51,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:51,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737024427] [2021-06-13 08:31:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:51,742 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,742 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:51,743 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:51,749 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:51,749 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:51,767 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-13 08:31:51,768 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-13 08:31:51,782 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:51,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:51,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:51,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737024427] [2021-06-13 08:31:51,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737024427] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:51,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:51,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:51,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198684895] [2021-06-13 08:31:51,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:51,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:51,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:51,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:51,799 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:51,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 34 transitions, 379 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:51,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:51,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:51,847 INFO L129 PetriNetUnfolder]: 2/117 cut-off events. [2021-06-13 08:31:51,847 INFO L130 PetriNetUnfolder]: For 410/410 co-relation queries the response was YES. [2021-06-13 08:31:51,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 117 events. 2/117 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 715 event pairs, 0 based on Foata normal form. 1/118 useless extension candidates. Maximal degree in co-relation 389. Up to 19 conditions per place. [2021-06-13 08:31:51,848 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 18 selfloop transitions, 11 changer transitions 2/43 dead transitions. [2021-06-13 08:31:51,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 43 transitions, 532 flow [2021-06-13 08:31:51,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:51,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:51,849 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:51,849 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:51,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,851 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,851 INFO L185 Difference]: Start difference. First operand has 67 places, 34 transitions, 379 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:51,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 43 transitions, 532 flow [2021-06-13 08:31:51,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 43 transitions, 505 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-06-13 08:31:51,864 INFO L241 Difference]: Finished difference. Result has 72 places, 37 transitions, 443 flow [2021-06-13 08:31:51,865 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=443, PETRI_PLACES=72, PETRI_TRANSITIONS=37} [2021-06-13 08:31:51,865 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2021-06-13 08:31:51,865 INFO L482 AbstractCegarLoop]: Abstraction has has 72 places, 37 transitions, 443 flow [2021-06-13 08:31:51,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,865 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:51,866 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:51,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-13 08:31:51,866 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:51,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:51,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1437271129, now seen corresponding path program 13 times [2021-06-13 08:31:51,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:51,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526937400] [2021-06-13 08:31:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:51,882 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:51,883 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,884 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:51,889 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-13 08:31:51,889 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-13 08:31:51,898 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:51,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:51,911 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:51,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:51,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:51,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526937400] [2021-06-13 08:31:51,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526937400] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:51,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:51,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:51,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407876854] [2021-06-13 08:31:51,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:51,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:51,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:51,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:51,927 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:51,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 37 transitions, 443 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:51,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:51,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:51,974 INFO L129 PetriNetUnfolder]: 2/108 cut-off events. [2021-06-13 08:31:51,974 INFO L130 PetriNetUnfolder]: For 471/471 co-relation queries the response was YES. [2021-06-13 08:31:51,974 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 108 events. 2/108 cut-off events. For 471/471 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 635 event pairs, 0 based on Foata normal form. 1/109 useless extension candidates. Maximal degree in co-relation 381. Up to 16 conditions per place. [2021-06-13 08:31:51,975 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 15 selfloop transitions, 11 changer transitions 3/41 dead transitions. [2021-06-13 08:31:51,975 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 41 transitions, 532 flow [2021-06-13 08:31:51,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:51,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:51,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:51,976 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:51,976 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:51,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:51,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,977 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,978 INFO L185 Difference]: Start difference. First operand has 72 places, 37 transitions, 443 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:51,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 41 transitions, 532 flow [2021-06-13 08:31:51,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 41 transitions, 517 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-06-13 08:31:51,981 INFO L241 Difference]: Finished difference. Result has 75 places, 35 transitions, 422 flow [2021-06-13 08:31:51,981 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=422, PETRI_PLACES=75, PETRI_TRANSITIONS=35} [2021-06-13 08:31:51,982 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2021-06-13 08:31:51,982 INFO L482 AbstractCegarLoop]: Abstraction has has 75 places, 35 transitions, 422 flow [2021-06-13 08:31:51,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:51,982 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:51,982 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:51,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-13 08:31:51,982 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:51,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:51,983 INFO L82 PathProgramCache]: Analyzing trace with hash 481045243, now seen corresponding path program 14 times [2021-06-13 08:31:51,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:51,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943392596] [2021-06-13 08:31:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:51,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,994 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:51,994 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:51,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:52,000 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:52,001 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:52,017 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-13 08:31:52,018 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-13 08:31:52,032 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:52,033 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:52,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:52,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943392596] [2021-06-13 08:31:52,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943392596] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:52,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:52,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:52,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420119424] [2021-06-13 08:31:52,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:52,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:52,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:52,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:52,047 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:52,047 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 35 transitions, 422 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,047 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:52,047 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:52,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:52,088 INFO L129 PetriNetUnfolder]: 2/97 cut-off events. [2021-06-13 08:31:52,088 INFO L130 PetriNetUnfolder]: For 458/458 co-relation queries the response was YES. [2021-06-13 08:31:52,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 97 events. 2/97 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 523 event pairs, 0 based on Foata normal form. 1/98 useless extension candidates. Maximal degree in co-relation 353. Up to 17 conditions per place. [2021-06-13 08:31:52,089 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 14 selfloop transitions, 9 changer transitions 3/38 dead transitions. [2021-06-13 08:31:52,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 38 transitions, 492 flow [2021-06-13 08:31:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-06-13 08:31:52,090 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-06-13 08:31:52,090 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-06-13 08:31:52,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-06-13 08:31:52,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:52,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-06-13 08:31:52,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,092 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,092 INFO L185 Difference]: Start difference. First operand has 75 places, 35 transitions, 422 flow. Second operand 6 states and 187 transitions. [2021-06-13 08:31:52,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 38 transitions, 492 flow [2021-06-13 08:31:52,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 38 transitions, 462 flow, removed 6 selfloop flow, removed 4 redundant places. [2021-06-13 08:31:52,095 INFO L241 Difference]: Finished difference. Result has 75 places, 32 transitions, 366 flow [2021-06-13 08:31:52,095 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=75, PETRI_TRANSITIONS=32} [2021-06-13 08:31:52,095 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2021-06-13 08:31:52,096 INFO L482 AbstractCegarLoop]: Abstraction has has 75 places, 32 transitions, 366 flow [2021-06-13 08:31:52,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,096 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:52,096 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:52,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-13 08:31:52,096 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:52,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:52,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1237098571, now seen corresponding path program 15 times [2021-06-13 08:31:52,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:52,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677842109] [2021-06-13 08:31:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:52,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:52,108 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:52,114 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-13 08:31:52,123 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:52,124 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:52,136 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:52,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:52,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:52,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677842109] [2021-06-13 08:31:52,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677842109] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:52,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:52,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:52,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347784787] [2021-06-13 08:31:52,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:52,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:52,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:52,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:52,152 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:52,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 32 transitions, 366 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:52,153 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:52,153 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:52,209 INFO L129 PetriNetUnfolder]: 0/113 cut-off events. [2021-06-13 08:31:52,209 INFO L130 PetriNetUnfolder]: For 510/510 co-relation queries the response was YES. [2021-06-13 08:31:52,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 425 conditions, 113 events. 0/113 cut-off events. For 510/510 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 681 event pairs, 0 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-06-13 08:31:52,209 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 17 selfloop transitions, 10 changer transitions 2/41 dead transitions. [2021-06-13 08:31:52,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 41 transitions, 566 flow [2021-06-13 08:31:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:52,211 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:52,211 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:52,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:52,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:52,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:52,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,212 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,212 INFO L185 Difference]: Start difference. First operand has 75 places, 32 transitions, 366 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:52,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 41 transitions, 566 flow [2021-06-13 08:31:52,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 41 transitions, 520 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-06-13 08:31:52,216 INFO L241 Difference]: Finished difference. Result has 76 places, 36 transitions, 454 flow [2021-06-13 08:31:52,216 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=454, PETRI_PLACES=76, PETRI_TRANSITIONS=36} [2021-06-13 08:31:52,216 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2021-06-13 08:31:52,216 INFO L482 AbstractCegarLoop]: Abstraction has has 76 places, 36 transitions, 454 flow [2021-06-13 08:31:52,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,216 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:52,216 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:52,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-13 08:31:52,217 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:52,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:52,217 INFO L82 PathProgramCache]: Analyzing trace with hash 82248435, now seen corresponding path program 16 times [2021-06-13 08:31:52,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:52,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788760589] [2021-06-13 08:31:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:52,226 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:52,227 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:52,233 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,233 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-13 08:31:52,242 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-13 08:31:52,248 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-13 08:31:52,262 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:52,262 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:52,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:52,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788760589] [2021-06-13 08:31:52,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788760589] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:52,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:52,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:52,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741823208] [2021-06-13 08:31:52,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:52,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:52,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:52,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:52,277 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:52,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 36 transitions, 454 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:52,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:52,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:52,313 INFO L129 PetriNetUnfolder]: 0/104 cut-off events. [2021-06-13 08:31:52,314 INFO L130 PetriNetUnfolder]: For 468/470 co-relation queries the response was YES. [2021-06-13 08:31:52,314 INFO L84 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 104 events. 0/104 cut-off events. For 468/470 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 593 event pairs, 0 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2021-06-13 08:31:52,314 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 16 selfloop transitions, 10 changer transitions 2/40 dead transitions. [2021-06-13 08:31:52,314 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 40 transitions, 545 flow [2021-06-13 08:31:52,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:52,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:52,315 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:52,315 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:52,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:52,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:52,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:52,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,317 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,317 INFO L185 Difference]: Start difference. First operand has 76 places, 36 transitions, 454 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:52,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 40 transitions, 545 flow [2021-06-13 08:31:52,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 40 transitions, 532 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-06-13 08:31:52,320 INFO L241 Difference]: Finished difference. Result has 80 places, 36 transitions, 471 flow [2021-06-13 08:31:52,321 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=471, PETRI_PLACES=80, PETRI_TRANSITIONS=36} [2021-06-13 08:31:52,321 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2021-06-13 08:31:52,321 INFO L482 AbstractCegarLoop]: Abstraction has has 80 places, 36 transitions, 471 flow [2021-06-13 08:31:52,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,321 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:52,321 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:52,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-13 08:31:52,321 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:52,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:52,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1060420559, now seen corresponding path program 17 times [2021-06-13 08:31:52,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:52,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554157225] [2021-06-13 08:31:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:52,332 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:52,332 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,333 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:52,338 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,338 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-13 08:31:52,346 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:52,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:52,361 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:52,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:52,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:52,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554157225] [2021-06-13 08:31:52,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554157225] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:52,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:52,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:52,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211019940] [2021-06-13 08:31:52,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:52,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:52,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:52,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:52,376 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:52,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 36 transitions, 471 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:52,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:52,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:52,430 INFO L129 PetriNetUnfolder]: 0/95 cut-off events. [2021-06-13 08:31:52,430 INFO L130 PetriNetUnfolder]: For 532/537 co-relation queries the response was YES. [2021-06-13 08:31:52,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 95 events. 0/95 cut-off events. For 532/537 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 509 event pairs, 0 based on Foata normal form. 3/98 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2021-06-13 08:31:52,430 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 13 selfloop transitions, 9 changer transitions 3/37 dead transitions. [2021-06-13 08:31:52,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 37 transitions, 525 flow [2021-06-13 08:31:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2021-06-13 08:31:52,432 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8857142857142857 [2021-06-13 08:31:52,432 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 186 transitions. [2021-06-13 08:31:52,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 186 transitions. [2021-06-13 08:31:52,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:52,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 186 transitions. [2021-06-13 08:31:52,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,433 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,433 INFO L185 Difference]: Start difference. First operand has 80 places, 36 transitions, 471 flow. Second operand 6 states and 186 transitions. [2021-06-13 08:31:52,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 37 transitions, 525 flow [2021-06-13 08:31:52,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 37 transitions, 513 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-06-13 08:31:52,437 INFO L241 Difference]: Finished difference. Result has 83 places, 33 transitions, 422 flow [2021-06-13 08:31:52,437 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=422, PETRI_PLACES=83, PETRI_TRANSITIONS=33} [2021-06-13 08:31:52,437 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2021-06-13 08:31:52,437 INFO L482 AbstractCegarLoop]: Abstraction has has 83 places, 33 transitions, 422 flow [2021-06-13 08:31:52,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,437 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:52,437 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:52,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-13 08:31:52,438 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:52,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:52,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1124764141, now seen corresponding path program 18 times [2021-06-13 08:31:52,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:52,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705098584] [2021-06-13 08:31:52,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:52,448 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,448 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:52,449 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,449 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:52,455 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-13 08:31:52,455 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-13 08:31:52,467 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-13 08:31:52,467 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-13 08:31:52,481 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:52,482 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:52,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:52,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705098584] [2021-06-13 08:31:52,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705098584] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:52,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:52,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:52,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841742075] [2021-06-13 08:31:52,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:52,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:52,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:52,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:52,496 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:52,496 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 33 transitions, 422 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,496 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:52,496 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:52,496 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:52,530 INFO L129 PetriNetUnfolder]: 0/82 cut-off events. [2021-06-13 08:31:52,530 INFO L130 PetriNetUnfolder]: For 433/433 co-relation queries the response was YES. [2021-06-13 08:31:52,531 INFO L84 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 82 events. 0/82 cut-off events. For 433/433 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 402 event pairs, 0 based on Foata normal form. 1/83 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-06-13 08:31:52,531 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 14 selfloop transitions, 9 changer transitions 2/37 dead transitions. [2021-06-13 08:31:52,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 37 transitions, 507 flow [2021-06-13 08:31:52,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:52,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:52,532 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:52,532 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:52,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:52,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:52,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:52,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,534 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,534 INFO L185 Difference]: Start difference. First operand has 83 places, 33 transitions, 422 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:52,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 37 transitions, 507 flow [2021-06-13 08:31:52,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 37 transitions, 450 flow, removed 6 selfloop flow, removed 8 redundant places. [2021-06-13 08:31:52,537 INFO L241 Difference]: Finished difference. Result has 79 places, 32 transitions, 373 flow [2021-06-13 08:31:52,537 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=373, PETRI_PLACES=79, PETRI_TRANSITIONS=32} [2021-06-13 08:31:52,537 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2021-06-13 08:31:52,537 INFO L482 AbstractCegarLoop]: Abstraction has has 79 places, 32 transitions, 373 flow [2021-06-13 08:31:52,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,538 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:52,538 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:52,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-13 08:31:52,538 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:52,538 INFO L82 PathProgramCache]: Analyzing trace with hash -2127453813, now seen corresponding path program 19 times [2021-06-13 08:31:52,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:52,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158143103] [2021-06-13 08:31:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:52,548 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,548 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:52,548 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,549 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:52,554 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-13 08:31:52,554 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-13 08:31:52,563 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:52,563 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:52,576 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:52,576 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:52,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:52,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158143103] [2021-06-13 08:31:52,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158143103] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:52,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:52,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:52,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698734431] [2021-06-13 08:31:52,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:52,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:52,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:52,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:52,592 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:52,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 32 transitions, 373 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:52,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:52,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:52,635 INFO L129 PetriNetUnfolder]: 0/73 cut-off events. [2021-06-13 08:31:52,635 INFO L130 PetriNetUnfolder]: For 311/316 co-relation queries the response was YES. [2021-06-13 08:31:52,635 INFO L84 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 73 events. 0/73 cut-off events. For 311/316 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 338 event pairs, 0 based on Foata normal form. 3/76 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-06-13 08:31:52,636 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 13 selfloop transitions, 7 changer transitions 3/35 dead transitions. [2021-06-13 08:31:52,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 35 transitions, 442 flow [2021-06-13 08:31:52,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:52,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-13 08:31:52,637 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-13 08:31:52,637 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-13 08:31:52,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-13 08:31:52,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:52,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-13 08:31:52,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,638 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,638 INFO L185 Difference]: Start difference. First operand has 79 places, 32 transitions, 373 flow. Second operand 6 states and 188 transitions. [2021-06-13 08:31:52,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 35 transitions, 442 flow [2021-06-13 08:31:52,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 35 transitions, 418 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-06-13 08:31:52,641 INFO L241 Difference]: Finished difference. Result has 81 places, 30 transitions, 339 flow [2021-06-13 08:31:52,641 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=81, PETRI_TRANSITIONS=30} [2021-06-13 08:31:52,641 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2021-06-13 08:31:52,641 INFO L482 AbstractCegarLoop]: Abstraction has has 81 places, 30 transitions, 339 flow [2021-06-13 08:31:52,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,641 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:52,642 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:52,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-13 08:31:52,642 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:52,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:52,642 INFO L82 PathProgramCache]: Analyzing trace with hash -387695469, now seen corresponding path program 20 times [2021-06-13 08:31:52,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:52,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823955317] [2021-06-13 08:31:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:52,652 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,652 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:52,653 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,653 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:52,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,658 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-13 08:31:52,667 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:52,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:52,680 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:52,705 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:52,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:52,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823955317] [2021-06-13 08:31:52,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823955317] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:52,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:52,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:52,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916596785] [2021-06-13 08:31:52,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:52,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:52,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:52,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:52,737 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:52,737 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 30 transitions, 339 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:52,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:52,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:52,779 INFO L129 PetriNetUnfolder]: 0/62 cut-off events. [2021-06-13 08:31:52,779 INFO L130 PetriNetUnfolder]: For 264/264 co-relation queries the response was YES. [2021-06-13 08:31:52,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 62 events. 0/62 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 249 event pairs, 0 based on Foata normal form. 1/63 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-06-13 08:31:52,780 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 9 selfloop transitions, 7 changer transitions 3/31 dead transitions. [2021-06-13 08:31:52,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 31 transitions, 381 flow [2021-06-13 08:31:52,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-06-13 08:31:52,781 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-06-13 08:31:52,781 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-06-13 08:31:52,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-06-13 08:31:52,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:52,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-06-13 08:31:52,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,782 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,782 INFO L185 Difference]: Start difference. First operand has 81 places, 30 transitions, 339 flow. Second operand 6 states and 187 transitions. [2021-06-13 08:31:52,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 31 transitions, 381 flow [2021-06-13 08:31:52,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 31 transitions, 361 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-06-13 08:31:52,785 INFO L241 Difference]: Finished difference. Result has 81 places, 27 transitions, 289 flow [2021-06-13 08:31:52,785 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=289, PETRI_PLACES=81, PETRI_TRANSITIONS=27} [2021-06-13 08:31:52,785 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2021-06-13 08:31:52,785 INFO L482 AbstractCegarLoop]: Abstraction has has 81 places, 27 transitions, 289 flow [2021-06-13 08:31:52,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,785 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:52,785 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:52,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-13 08:31:52,785 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:52,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:52,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1627308399, now seen corresponding path program 21 times [2021-06-13 08:31:52,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:52,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721706871] [2021-06-13 08:31:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:52,796 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,796 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:52,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:52,802 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:52,802 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:52,817 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-13 08:31:52,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-13 08:31:52,830 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:52,831 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:52,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:52,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721706871] [2021-06-13 08:31:52,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721706871] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:52,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:52,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:52,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164222645] [2021-06-13 08:31:52,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:52,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:52,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:52,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:52,845 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:52,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 27 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:52,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:52,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:52,875 INFO L129 PetriNetUnfolder]: 0/51 cut-off events. [2021-06-13 08:31:52,875 INFO L130 PetriNetUnfolder]: For 221/221 co-relation queries the response was YES. [2021-06-13 08:31:52,875 INFO L84 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 51 events. 0/51 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 170 event pairs, 0 based on Foata normal form. 1/52 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-06-13 08:31:52,875 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 7 selfloop transitions, 5 changer transitions 4/28 dead transitions. [2021-06-13 08:31:52,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 28 transitions, 325 flow [2021-06-13 08:31:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2021-06-13 08:31:52,876 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8809523809523809 [2021-06-13 08:31:52,877 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 185 transitions. [2021-06-13 08:31:52,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 185 transitions. [2021-06-13 08:31:52,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:52,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 185 transitions. [2021-06-13 08:31:52,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.833333333333332) internal successors, (185), 6 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,878 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,878 INFO L185 Difference]: Start difference. First operand has 81 places, 27 transitions, 289 flow. Second operand 6 states and 185 transitions. [2021-06-13 08:31:52,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 28 transitions, 325 flow [2021-06-13 08:31:52,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 28 transitions, 279 flow, removed 5 selfloop flow, removed 9 redundant places. [2021-06-13 08:31:52,880 INFO L241 Difference]: Finished difference. Result has 72 places, 23 transitions, 198 flow [2021-06-13 08:31:52,880 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=72, PETRI_TRANSITIONS=23} [2021-06-13 08:31:52,880 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2021-06-13 08:31:52,880 INFO L482 AbstractCegarLoop]: Abstraction has has 72 places, 23 transitions, 198 flow [2021-06-13 08:31:52,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,880 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:52,880 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:52,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-13 08:31:52,880 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:52,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:52,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1521274607, now seen corresponding path program 22 times [2021-06-13 08:31:52,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:52,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010857106] [2021-06-13 08:31:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:52,890 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,890 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:52,890 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:52,896 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,896 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-13 08:31:52,904 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:52,905 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:52,919 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:52,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:52,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:52,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010857106] [2021-06-13 08:31:52,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010857106] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:52,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:52,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:52,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772075469] [2021-06-13 08:31:52,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:52,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:52,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:52,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:52,937 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:52,938 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 23 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,938 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:52,938 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:52,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:52,977 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-06-13 08:31:52,977 INFO L130 PetriNetUnfolder]: For 121/121 co-relation queries the response was YES. [2021-06-13 08:31:52,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 38 events. 0/38 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 96 event pairs, 0 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-06-13 08:31:52,977 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 5 selfloop transitions, 3 changer transitions 3/23 dead transitions. [2021-06-13 08:31:52,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 23 transitions, 220 flow [2021-06-13 08:31:52,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:52,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2021-06-13 08:31:52,978 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8714285714285714 [2021-06-13 08:31:52,978 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 183 transitions. [2021-06-13 08:31:52,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 183 transitions. [2021-06-13 08:31:52,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:52,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 183 transitions. [2021-06-13 08:31:52,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,980 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,980 INFO L185 Difference]: Start difference. First operand has 72 places, 23 transitions, 198 flow. Second operand 6 states and 183 transitions. [2021-06-13 08:31:52,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 23 transitions, 220 flow [2021-06-13 08:31:52,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 23 transitions, 169 flow, removed 3 selfloop flow, removed 12 redundant places. [2021-06-13 08:31:52,982 INFO L241 Difference]: Finished difference. Result has 59 places, 20 transitions, 120 flow [2021-06-13 08:31:52,982 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=120, PETRI_PLACES=59, PETRI_TRANSITIONS=20} [2021-06-13 08:31:52,982 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 29 predicate places. [2021-06-13 08:31:52,982 INFO L482 AbstractCegarLoop]: Abstraction has has 59 places, 20 transitions, 120 flow [2021-06-13 08:31:52,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:52,982 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:52,982 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:52,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-13 08:31:52,983 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:52,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:52,983 INFO L82 PathProgramCache]: Analyzing trace with hash 47653935, now seen corresponding path program 23 times [2021-06-13 08:31:52,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:52,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690390788] [2021-06-13 08:31:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:52,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:52,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:52,997 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:53,003 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-13 08:31:53,003 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-13 08:31:53,012 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-13 08:31:53,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-13 08:31:53,025 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:53,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:53,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:53,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690390788] [2021-06-13 08:31:53,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690390788] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:53,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:53,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:53,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979084580] [2021-06-13 08:31:53,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:53,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:53,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:53,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:53,040 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:53,040 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 20 transitions, 120 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:53,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:53,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:53,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:53,078 INFO L129 PetriNetUnfolder]: 0/27 cut-off events. [2021-06-13 08:31:53,079 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2021-06-13 08:31:53,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 27 events. 0/27 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 40 event pairs, 0 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-13 08:31:53,079 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 2 selfloop transitions, 3 changer transitions 3/20 dead transitions. [2021-06-13 08:31:53,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 20 transitions, 136 flow [2021-06-13 08:31:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2021-06-13 08:31:53,080 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.861904761904762 [2021-06-13 08:31:53,080 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 181 transitions. [2021-06-13 08:31:53,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 181 transitions. [2021-06-13 08:31:53,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:53,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 181 transitions. [2021-06-13 08:31:53,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:53,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:53,081 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:53,081 INFO L185 Difference]: Start difference. First operand has 59 places, 20 transitions, 120 flow. Second operand 6 states and 181 transitions. [2021-06-13 08:31:53,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 20 transitions, 136 flow [2021-06-13 08:31:53,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 20 transitions, 112 flow, removed 4 selfloop flow, removed 7 redundant places. [2021-06-13 08:31:53,082 INFO L241 Difference]: Finished difference. Result has 53 places, 17 transitions, 74 flow [2021-06-13 08:31:53,083 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=74, PETRI_PLACES=53, PETRI_TRANSITIONS=17} [2021-06-13 08:31:53,083 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2021-06-13 08:31:53,083 INFO L482 AbstractCegarLoop]: Abstraction has has 53 places, 17 transitions, 74 flow [2021-06-13 08:31:53,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:53,083 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:31:53,083 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:31:53,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-13 08:31:53,083 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:31:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:31:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash 722691829, now seen corresponding path program 24 times [2021-06-13 08:31:53,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:31:53,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997133107] [2021-06-13 08:31:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:31:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:31:53,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:53,097 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:31:53,098 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:53,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:31:53,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:31:53,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-13 08:31:53,112 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-13 08:31:53,119 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-13 08:31:53,135 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-13 08:31:53,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-13 08:31:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:31:53,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:31:53,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997133107] [2021-06-13 08:31:53,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997133107] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:31:53,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:31:53,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-13 08:31:53,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128804477] [2021-06-13 08:31:53,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:31:53,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:31:53,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:31:53,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:31:53,151 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-13 08:31:53,151 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 17 transitions, 74 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:53,151 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:31:53,151 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-13 08:31:53,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:31:53,171 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-13 08:31:53,171 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-06-13 08:31:53,171 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 16 events. 0/16 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 5 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-13 08:31:53,172 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2021-06-13 08:31:53,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 16 transitions, 78 flow [2021-06-13 08:31:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:31:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:31:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2021-06-13 08:31:53,172 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8523809523809524 [2021-06-13 08:31:53,172 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 179 transitions. [2021-06-13 08:31:53,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 179 transitions. [2021-06-13 08:31:53,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:31:53,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 179 transitions. [2021-06-13 08:31:53,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:53,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:53,173 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:53,174 INFO L185 Difference]: Start difference. First operand has 53 places, 17 transitions, 74 flow. Second operand 6 states and 179 transitions. [2021-06-13 08:31:53,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 16 transitions, 78 flow [2021-06-13 08:31:53,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 16 transitions, 62 flow, removed 1 selfloop flow, removed 8 redundant places. [2021-06-13 08:31:53,174 INFO L241 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2021-06-13 08:31:53,174 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2021-06-13 08:31:53,174 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2021-06-13 08:31:53,174 INFO L482 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2021-06-13 08:31:53,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:31:53,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-13 08:31:53,177 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-13 08:31:53,179 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.06 08:31:53 BasicIcfg [2021-06-13 08:31:53,179 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-13 08:31:53,179 INFO L168 Benchmark]: Toolchain (without parser) took 4415.00 ms. Allocated memory was 180.4 MB in the beginning and 226.5 MB in the end (delta: 46.1 MB). Free memory was 160.0 MB in the beginning and 107.3 MB in the end (delta: 52.8 MB). Peak memory consumption was 98.3 MB. Max. memory is 8.0 GB. [2021-06-13 08:31:53,180 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 180.4 MB. Free memory is still 161.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 08:31:53,180 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.25 ms. Allocated memory is still 180.4 MB. Free memory was 159.9 MB in the beginning and 158.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 08:31:53,180 INFO L168 Benchmark]: Boogie Preprocessor took 13.52 ms. Allocated memory is still 180.4 MB. Free memory was 158.5 MB in the beginning and 157.7 MB in the end (delta: 839.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 08:31:53,180 INFO L168 Benchmark]: RCFGBuilder took 231.23 ms. Allocated memory is still 180.4 MB. Free memory was 157.6 MB in the beginning and 148.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-06-13 08:31:53,180 INFO L168 Benchmark]: TraceAbstraction took 4129.54 ms. Allocated memory was 180.4 MB in the beginning and 226.5 MB in the end (delta: 46.1 MB). Free memory was 147.9 MB in the beginning and 107.3 MB in the end (delta: 40.6 MB). Peak memory consumption was 86.7 MB. Max. memory is 8.0 GB. [2021-06-13 08:31:53,180 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 180.4 MB. Free memory is still 161.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.25 ms. Allocated memory is still 180.4 MB. Free memory was 159.9 MB in the beginning and 158.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.52 ms. Allocated memory is still 180.4 MB. Free memory was 158.5 MB in the beginning and 157.7 MB in the end (delta: 839.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 231.23 ms. Allocated memory is still 180.4 MB. Free memory was 157.6 MB in the beginning and 148.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4129.54 ms. Allocated memory was 180.4 MB in the beginning and 226.5 MB in the end (delta: 46.1 MB). Free memory was 147.9 MB in the beginning and 107.3 MB in the end (delta: 40.6 MB). Peak memory consumption was 86.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 40 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 35.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 4023.6ms, OverallIterations: 27, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1630.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 44.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 198 SDtfs, 250 SDslu, 131 SDs, 0 SdLazy, 367 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 321.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1556.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=473occurred in iteration=12, InterpolantAutomatonStates: 153, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 36.2ms SsaConstructionTime, 69.0ms SatisfiabilityAnalysisTime, 1914.7ms InterpolantComputationTime, 459 NumberOfCodeBlocks, 459 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 432 ConstructedInterpolants, 0 QuantifiedInterpolants, 6517 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 27 InterpolantComputations, 27 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...