/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-11 00:10:48,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-11 00:10:48,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-11 00:10:48,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-11 00:10:48,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-11 00:10:48,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-11 00:10:48,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-11 00:10:48,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-11 00:10:48,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-11 00:10:48,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-11 00:10:48,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-11 00:10:48,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-11 00:10:48,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-11 00:10:48,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-11 00:10:48,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-11 00:10:48,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-11 00:10:48,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-11 00:10:48,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-11 00:10:48,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-11 00:10:48,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-11 00:10:48,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-11 00:10:48,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-11 00:10:48,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-11 00:10:48,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-11 00:10:48,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-11 00:10:48,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-11 00:10:48,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-11 00:10:48,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-11 00:10:48,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-06-11 00:10:48,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-11 00:10:48,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-11 00:10:48,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-11 00:10:48,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-11 00:10:48,715 INFO L138 SettingsManager]: * Use SBE=true [2021-06-11 00:10:48,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-11 00:10:48,715 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-11 00:10:48,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-11 00:10:48,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-11 00:10:48,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-11 00:10:48,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-11 00:10:48,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-11 00:10:48,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-11 00:10:48,717 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-11 00:10:48,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-11 00:10:48,718 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-11 00:10:48,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-11 00:10:48,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-11 00:10:48,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-11 00:10:48,718 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-11 00:10:48,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-11 00:10:48,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-11 00:10:48,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-11 00:10:48,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-11 00:10:48,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-11 00:10:48,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-11 00:10:48,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-11 00:10:48,720 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-11 00:10:48,720 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-11 00:10:49,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-11 00:10:49,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-11 00:10:49,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-11 00:10:49,075 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-11 00:10:49,076 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-11 00:10:49,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl [2021-06-11 00:10:49,077 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl' [2021-06-11 00:10:49,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-11 00:10:49,116 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-11 00:10:49,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-11 00:10:49,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-11 00:10:49,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-11 00:10:49,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:10:49" (1/1) ... [2021-06-11 00:10:49,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:10:49" (1/1) ... [2021-06-11 00:10:49,139 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-11 00:10:49,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-11 00:10:49,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-11 00:10:49,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-11 00:10:49,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:10:49" (1/1) ... [2021-06-11 00:10:49,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:10:49" (1/1) ... [2021-06-11 00:10:49,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:10:49" (1/1) ... [2021-06-11 00:10:49,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:10:49" (1/1) ... [2021-06-11 00:10:49,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:10:49" (1/1) ... [2021-06-11 00:10:49,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:10:49" (1/1) ... [2021-06-11 00:10:49,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:10:49" (1/1) ... [2021-06-11 00:10:49,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-11 00:10:49,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-11 00:10:49,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-11 00:10:49,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-11 00:10:49,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:10:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-11 00:10:49,235 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-06-11 00:10:49,235 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-06-11 00:10:49,235 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-06-11 00:10:49,235 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2021-06-11 00:10:49,236 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2021-06-11 00:10:49,236 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2021-06-11 00:10:49,236 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_3 given in one single declaration [2021-06-11 00:10:49,236 INFO L130 BoogieDeclarations]: Found specification of procedure set_3 [2021-06-11 00:10:49,236 INFO L138 BoogieDeclarations]: Found implementation of procedure set_3 [2021-06-11 00:10:49,236 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-06-11 00:10:49,236 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-06-11 00:10:49,236 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-06-11 00:10:49,237 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-11 00:10:49,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-11 00:10:49,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-11 00:10:49,238 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-11 00:10:49,349 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-11 00:10:49,349 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-11 00:10:49,350 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.06 12:10:49 BoogieIcfgContainer [2021-06-11 00:10:49,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-11 00:10:49,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-11 00:10:49,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-11 00:10:49,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-11 00:10:49,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:10:49" (1/2) ... [2021-06-11 00:10:49,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30bcafd and model type example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.06 12:10:49, skipping insertion in model container [2021-06-11 00:10:49,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.06 12:10:49" (2/2) ... [2021-06-11 00:10:49,357 INFO L111 eAbstractionObserver]: Analyzing ICFG example_4.bpl [2021-06-11 00:10:49,361 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-11 00:10:49,365 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-11 00:10:49,366 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-11 00:10:49,408 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2021-06-11 00:10:49,424 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-11 00:10:49,457 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-11 00:10:49,457 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-11 00:10:49,457 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-11 00:10:49,457 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-11 00:10:49,457 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-11 00:10:49,458 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-11 00:10:49,458 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-11 00:10:49,458 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-11 00:10:49,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 35 transitions, 138 flow [2021-06-11 00:10:49,495 INFO L129 PetriNetUnfolder]: 17/47 cut-off events. [2021-06-11 00:10:49,495 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-11 00:10:49,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 47 events. 17/47 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 122 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 41. Up to 12 conditions per place. [2021-06-11 00:10:49,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 35 transitions, 138 flow [2021-06-11 00:10:49,503 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 29 transitions, 118 flow [2021-06-11 00:10:49,505 INFO L168 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-06-11 00:10:49,516 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 30 places, 29 transitions, 118 flow [2021-06-11 00:10:49,519 INFO L138 LiptonReduction]: Starting Lipton reduction on Petri net that has 30 places, 29 transitions, 118 flow [2021-06-11 00:10:49,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 118 flow [2021-06-11 00:10:49,538 INFO L129 PetriNetUnfolder]: 17/45 cut-off events. [2021-06-11 00:10:49,538 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-11 00:10:49,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 45 events. 17/45 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 108 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 41. Up to 12 conditions per place. [2021-06-11 00:10:49,543 INFO L151 LiptonReduction]: Number of co-enabled transitions 216 [2021-06-11 00:10:49,641 INFO L163 LiptonReduction]: Checked pairs total: 66 [2021-06-11 00:10:49,641 INFO L165 LiptonReduction]: Total number of compositions: 4 [2021-06-11 00:10:49,643 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 140 [2021-06-11 00:10:49,674 INFO L129 PetriNetUnfolder]: 17/40 cut-off events. [2021-06-11 00:10:49,674 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-11 00:10:49,674 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:49,675 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:49,675 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:49,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:49,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1888322031, now seen corresponding path program 1 times [2021-06-11 00:10:49,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:49,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273927469] [2021-06-11 00:10:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:49,810 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:49,811 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:49,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:49,828 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-11 00:10:49,842 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:49,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:49,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273927469] [2021-06-11 00:10:49,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:49,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-11 00:10:49,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080287620] [2021-06-11 00:10:49,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-11 00:10:49,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:49,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-11 00:10:49,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-11 00:10:49,879 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 39 [2021-06-11 00:10:49,881 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:49,881 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:49,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 39 [2021-06-11 00:10:49,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:49,930 INFO L129 PetriNetUnfolder]: 14/37 cut-off events. [2021-06-11 00:10:49,931 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2021-06-11 00:10:49,933 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 37 events. 14/37 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 70 event pairs, 0 based on Foata normal form. 1/38 useless extension candidates. Maximal degree in co-relation 35. Up to 12 conditions per place. [2021-06-11 00:10:49,936 INFO L132 encePairwiseOnDemand]: 37/39 looper letters, 3 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2021-06-11 00:10:49,936 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 113 flow [2021-06-11 00:10:49,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-11 00:10:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-11 00:10:49,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2021-06-11 00:10:49,948 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9145299145299145 [2021-06-11 00:10:49,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2021-06-11 00:10:49,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2021-06-11 00:10:49,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:49,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2021-06-11 00:10:49,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:49,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:49,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:49,963 INFO L185 Difference]: Start difference. First operand has 26 places, 25 transitions, 110 flow. Second operand 3 states and 107 transitions. [2021-06-11 00:10:49,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 113 flow [2021-06-11 00:10:49,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 75 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-06-11 00:10:49,971 INFO L241 Difference]: Finished difference. Result has 20 places, 24 transitions, 69 flow [2021-06-11 00:10:49,973 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=20, PETRI_TRANSITIONS=24} [2021-06-11 00:10:49,974 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2021-06-11 00:10:49,974 INFO L480 AbstractCegarLoop]: Abstraction has has 20 places, 24 transitions, 69 flow [2021-06-11 00:10:49,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:49,974 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:49,975 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:49,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-11 00:10:49,975 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:49,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:49,976 INFO L82 PathProgramCache]: Analyzing trace with hash -153583415, now seen corresponding path program 1 times [2021-06-11 00:10:49,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:49,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306740510] [2021-06-11 00:10:49,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:50,012 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,016 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:50,018 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,018 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-11 00:10:50,024 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:50,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306740510] [2021-06-11 00:10:50,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:50,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-11 00:10:50,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016343834] [2021-06-11 00:10:50,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-11 00:10:50,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:50,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-11 00:10:50,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-11 00:10:50,039 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 39 [2021-06-11 00:10:50,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 24 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:50,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 39 [2021-06-11 00:10:50,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:50,058 INFO L129 PetriNetUnfolder]: 6/25 cut-off events. [2021-06-11 00:10:50,058 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-06-11 00:10:50,058 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 25 events. 6/25 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 3/28 useless extension candidates. Maximal degree in co-relation 30. Up to 6 conditions per place. [2021-06-11 00:10:50,059 INFO L132 encePairwiseOnDemand]: 36/39 looper letters, 2 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2021-06-11 00:10:50,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 69 flow [2021-06-11 00:10:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-11 00:10:50,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-11 00:10:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2021-06-11 00:10:50,064 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9145299145299145 [2021-06-11 00:10:50,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2021-06-11 00:10:50,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2021-06-11 00:10:50,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:50,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2021-06-11 00:10:50,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,066 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,066 INFO L185 Difference]: Start difference. First operand has 20 places, 24 transitions, 69 flow. Second operand 3 states and 107 transitions. [2021-06-11 00:10:50,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 69 flow [2021-06-11 00:10:50,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 68 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-11 00:10:50,067 INFO L241 Difference]: Finished difference. Result has 21 places, 22 transitions, 64 flow [2021-06-11 00:10:50,068 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=21, PETRI_TRANSITIONS=22} [2021-06-11 00:10:50,068 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2021-06-11 00:10:50,068 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 22 transitions, 64 flow [2021-06-11 00:10:50,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,069 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:50,069 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:50,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-11 00:10:50,069 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:50,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1587378979, now seen corresponding path program 1 times [2021-06-11 00:10:50,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:50,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672513762] [2021-06-11 00:10:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:50,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:50,100 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,101 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-11 00:10:50,106 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:50,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672513762] [2021-06-11 00:10:50,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:50,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-11 00:10:50,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137227955] [2021-06-11 00:10:50,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-11 00:10:50,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:50,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-11 00:10:50,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-11 00:10:50,112 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 39 [2021-06-11 00:10:50,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 22 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:50,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 39 [2021-06-11 00:10:50,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:50,126 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-06-11 00:10:50,126 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-11 00:10:50,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 13 events. 0/13 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 0 based on Foata normal form. 3/16 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-11 00:10:50,127 INFO L132 encePairwiseOnDemand]: 35/39 looper letters, 1 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2021-06-11 00:10:50,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 13 transitions, 41 flow [2021-06-11 00:10:50,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-11 00:10:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-11 00:10:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2021-06-11 00:10:50,131 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9145299145299145 [2021-06-11 00:10:50,132 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2021-06-11 00:10:50,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2021-06-11 00:10:50,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:50,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2021-06-11 00:10:50,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,136 INFO L185 Difference]: Start difference. First operand has 21 places, 22 transitions, 64 flow. Second operand 3 states and 107 transitions. [2021-06-11 00:10:50,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 13 transitions, 41 flow [2021-06-11 00:10:50,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 13 transitions, 40 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-11 00:10:50,138 INFO L241 Difference]: Finished difference. Result has 22 places, 13 transitions, 38 flow [2021-06-11 00:10:50,138 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=22, PETRI_TRANSITIONS=13} [2021-06-11 00:10:50,138 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, -4 predicate places. [2021-06-11 00:10:50,139 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 13 transitions, 38 flow [2021-06-11 00:10:50,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,139 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:50,139 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:50,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-11 00:10:50,139 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:50,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:50,140 INFO L82 PathProgramCache]: Analyzing trace with hash -136113801, now seen corresponding path program 1 times [2021-06-11 00:10:50,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:50,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863085538] [2021-06-11 00:10:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:50,206 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,206 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:50,213 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,214 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:50,225 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-11 00:10:50,256 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:50,258 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:50,283 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:50,288 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:50,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863085538] [2021-06-11 00:10:50,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:50,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:50,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373346364] [2021-06-11 00:10:50,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:50,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:50,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:50,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:50,317 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:50,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 13 transitions, 38 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:50,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:50,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:50,414 INFO L129 PetriNetUnfolder]: 15/65 cut-off events. [2021-06-11 00:10:50,414 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-11 00:10:50,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 65 events. 15/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 249 event pairs, 5 based on Foata normal form. 1/61 useless extension candidates. Maximal degree in co-relation 107. Up to 17 conditions per place. [2021-06-11 00:10:50,415 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 9 selfloop transitions, 3 changer transitions 1/21 dead transitions. [2021-06-11 00:10:50,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 80 flow [2021-06-11 00:10:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:50,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-11 00:10:50,418 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-06-11 00:10:50,418 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-11 00:10:50,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-11 00:10:50,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:50,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-11 00:10:50,419 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) [2021-06-11 00:10:50,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,420 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,420 INFO L185 Difference]: Start difference. First operand has 22 places, 13 transitions, 38 flow. Second operand 6 states and 188 transitions. [2021-06-11 00:10:50,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 80 flow [2021-06-11 00:10:50,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 21 transitions, 79 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-11 00:10:50,422 INFO L241 Difference]: Finished difference. Result has 30 places, 15 transitions, 60 flow [2021-06-11 00:10:50,422 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=60, PETRI_PLACES=30, PETRI_TRANSITIONS=15} [2021-06-11 00:10:50,422 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 4 predicate places. [2021-06-11 00:10:50,422 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 15 transitions, 60 flow [2021-06-11 00:10:50,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,423 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:50,423 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:50,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-11 00:10:50,423 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:50,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:50,427 INFO L82 PathProgramCache]: Analyzing trace with hash -816343229, now seen corresponding path program 2 times [2021-06-11 00:10:50,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:50,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417657890] [2021-06-11 00:10:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:50,447 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,448 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:50,449 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,449 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:50,454 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,455 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-11 00:10:50,465 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-11 00:10:50,466 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-11 00:10:50,482 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:50,483 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:50,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417657890] [2021-06-11 00:10:50,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:50,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:50,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083358346] [2021-06-11 00:10:50,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:50,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:50,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:50,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:50,499 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:50,499 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 15 transitions, 60 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,499 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:50,499 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:50,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:50,542 INFO L129 PetriNetUnfolder]: 11/87 cut-off events. [2021-06-11 00:10:50,543 INFO L130 PetriNetUnfolder]: For 72/80 co-relation queries the response was YES. [2021-06-11 00:10:50,543 INFO L84 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 87 events. 11/87 cut-off events. For 72/80 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 436 event pairs, 3 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 194. Up to 22 conditions per place. [2021-06-11 00:10:50,543 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 11 selfloop transitions, 5 changer transitions 2/26 dead transitions. [2021-06-11 00:10:50,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 149 flow [2021-06-11 00:10:50,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:50,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-11 00:10:50,545 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-06-11 00:10:50,545 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-11 00:10:50,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-11 00:10:50,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:50,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-11 00:10:50,546 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) [2021-06-11 00:10:50,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,547 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,547 INFO L185 Difference]: Start difference. First operand has 30 places, 15 transitions, 60 flow. Second operand 6 states and 188 transitions. [2021-06-11 00:10:50,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 149 flow [2021-06-11 00:10:50,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 139 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-06-11 00:10:50,549 INFO L241 Difference]: Finished difference. Result has 36 places, 19 transitions, 108 flow [2021-06-11 00:10:50,549 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=108, PETRI_PLACES=36, PETRI_TRANSITIONS=19} [2021-06-11 00:10:50,549 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2021-06-11 00:10:50,549 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 19 transitions, 108 flow [2021-06-11 00:10:50,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,549 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:50,550 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:50,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-11 00:10:50,550 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:50,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:50,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1390381937, now seen corresponding path program 3 times [2021-06-11 00:10:50,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:50,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629266430] [2021-06-11 00:10:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:50,572 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,573 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:50,574 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,574 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:50,580 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-11 00:10:50,581 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-11 00:10:50,591 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:50,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:50,607 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:50,608 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:50,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629266430] [2021-06-11 00:10:50,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:50,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:50,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464711290] [2021-06-11 00:10:50,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:50,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:50,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:50,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:50,624 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:50,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 19 transitions, 108 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:50,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:50,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:50,679 INFO L129 PetriNetUnfolder]: 10/95 cut-off events. [2021-06-11 00:10:50,679 INFO L130 PetriNetUnfolder]: For 171/177 co-relation queries the response was YES. [2021-06-11 00:10:50,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 95 events. 10/95 cut-off events. For 171/177 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 509 event pairs, 2 based on Foata normal form. 1/91 useless extension candidates. Maximal degree in co-relation 262. Up to 25 conditions per place. [2021-06-11 00:10:50,680 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 12 selfloop transitions, 9 changer transitions 1/30 dead transitions. [2021-06-11 00:10:50,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 30 transitions, 225 flow [2021-06-11 00:10:50,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-11 00:10:50,682 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-06-11 00:10:50,682 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-11 00:10:50,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-11 00:10:50,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:50,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-11 00:10:50,683 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) [2021-06-11 00:10:50,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,684 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,684 INFO L185 Difference]: Start difference. First operand has 36 places, 19 transitions, 108 flow. Second operand 6 states and 188 transitions. [2021-06-11 00:10:50,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 30 transitions, 225 flow [2021-06-11 00:10:50,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 30 transitions, 215 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-06-11 00:10:50,687 INFO L241 Difference]: Finished difference. Result has 42 places, 24 transitions, 189 flow [2021-06-11 00:10:50,688 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=42, PETRI_TRANSITIONS=24} [2021-06-11 00:10:50,688 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2021-06-11 00:10:50,688 INFO L480 AbstractCegarLoop]: Abstraction has has 42 places, 24 transitions, 189 flow [2021-06-11 00:10:50,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,688 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:50,688 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:50,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-11 00:10:50,689 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:50,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1130172361, now seen corresponding path program 4 times [2021-06-11 00:10:50,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:50,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481407132] [2021-06-11 00:10:50,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:50,748 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,748 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:50,749 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,749 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:50,754 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,763 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-11 00:10:50,778 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-11 00:10:50,779 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-11 00:10:50,798 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:50,800 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:50,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481407132] [2021-06-11 00:10:50,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:50,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:50,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661492031] [2021-06-11 00:10:50,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:50,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:50,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:50,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:50,823 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:50,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 24 transitions, 189 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:50,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:50,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:50,882 INFO L129 PetriNetUnfolder]: 8/101 cut-off events. [2021-06-11 00:10:50,882 INFO L130 PetriNetUnfolder]: For 315/323 co-relation queries the response was YES. [2021-06-11 00:10:50,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 101 events. 8/101 cut-off events. For 315/323 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 580 event pairs, 6 based on Foata normal form. 1/100 useless extension candidates. Maximal degree in co-relation 322. Up to 23 conditions per place. [2021-06-11 00:10:50,885 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 13 selfloop transitions, 11 changer transitions 2/34 dead transitions. [2021-06-11 00:10:50,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 34 transitions, 320 flow [2021-06-11 00:10:50,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:50,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-11 00:10:50,887 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-06-11 00:10:50,887 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-11 00:10:50,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-11 00:10:50,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:50,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-11 00:10:50,888 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) [2021-06-11 00:10:50,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,888 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,889 INFO L185 Difference]: Start difference. First operand has 42 places, 24 transitions, 189 flow. Second operand 6 states and 188 transitions. [2021-06-11 00:10:50,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 34 transitions, 320 flow [2021-06-11 00:10:50,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 34 transitions, 303 flow, removed 5 selfloop flow, removed 2 redundant places. [2021-06-11 00:10:50,896 INFO L241 Difference]: Finished difference. Result has 48 places, 26 transitions, 241 flow [2021-06-11 00:10:50,896 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=48, PETRI_TRANSITIONS=26} [2021-06-11 00:10:50,897 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2021-06-11 00:10:50,897 INFO L480 AbstractCegarLoop]: Abstraction has has 48 places, 26 transitions, 241 flow [2021-06-11 00:10:50,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:50,897 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:50,897 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:50,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-11 00:10:50,897 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:50,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:50,898 INFO L82 PathProgramCache]: Analyzing trace with hash 892919981, now seen corresponding path program 5 times [2021-06-11 00:10:50,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:50,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914903085] [2021-06-11 00:10:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:50,934 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,935 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:50,935 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,937 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:50,943 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:50,944 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-11 00:10:50,954 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:50,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:50,975 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:50,975 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:51,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914903085] [2021-06-11 00:10:51,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:51,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:51,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886452912] [2021-06-11 00:10:51,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:51,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:51,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:51,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:51,002 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:51,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 26 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:51,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:51,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:51,056 INFO L129 PetriNetUnfolder]: 7/99 cut-off events. [2021-06-11 00:10:51,056 INFO L130 PetriNetUnfolder]: For 450/460 co-relation queries the response was YES. [2021-06-11 00:10:51,057 INFO L84 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 99 events. 7/99 cut-off events. For 450/460 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 567 event pairs, 5 based on Foata normal form. 3/98 useless extension candidates. Maximal degree in co-relation 361. Up to 22 conditions per place. [2021-06-11 00:10:51,057 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 11 selfloop transitions, 12 changer transitions 4/35 dead transitions. [2021-06-11 00:10:51,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 35 transitions, 379 flow [2021-06-11 00:10:51,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:51,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-11 00:10:51,058 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-06-11 00:10:51,059 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-11 00:10:51,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-11 00:10:51,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:51,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-11 00:10:51,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,060 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,060 INFO L185 Difference]: Start difference. First operand has 48 places, 26 transitions, 241 flow. Second operand 6 states and 188 transitions. [2021-06-11 00:10:51,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 35 transitions, 379 flow [2021-06-11 00:10:51,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 35 transitions, 349 flow, removed 10 selfloop flow, removed 3 redundant places. [2021-06-11 00:10:51,064 INFO L241 Difference]: Finished difference. Result has 53 places, 27 transitions, 279 flow [2021-06-11 00:10:51,064 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=53, PETRI_TRANSITIONS=27} [2021-06-11 00:10:51,064 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 27 predicate places. [2021-06-11 00:10:51,064 INFO L480 AbstractCegarLoop]: Abstraction has has 53 places, 27 transitions, 279 flow [2021-06-11 00:10:51,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,064 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:51,064 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:51,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-11 00:10:51,065 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:51,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:51,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2125071045, now seen corresponding path program 6 times [2021-06-11 00:10:51,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:51,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019701579] [2021-06-11 00:10:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:51,112 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:51,121 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,121 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:51,126 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-11 00:10:51,127 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-11 00:10:51,138 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-11 00:10:51,139 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-11 00:10:51,153 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:51,154 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:51,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019701579] [2021-06-11 00:10:51,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:51,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:51,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429929780] [2021-06-11 00:10:51,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:51,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:51,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:51,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:51,172 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:51,172 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 27 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:51,173 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:51,173 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:51,222 INFO L129 PetriNetUnfolder]: 6/90 cut-off events. [2021-06-11 00:10:51,222 INFO L130 PetriNetUnfolder]: For 574/600 co-relation queries the response was YES. [2021-06-11 00:10:51,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 90 events. 6/90 cut-off events. For 574/600 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 499 event pairs, 6 based on Foata normal form. 6/93 useless extension candidates. Maximal degree in co-relation 361. Up to 23 conditions per place. [2021-06-11 00:10:51,223 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 10 selfloop transitions, 14 changer transitions 1/33 dead transitions. [2021-06-11 00:10:51,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 33 transitions, 389 flow [2021-06-11 00:10:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:51,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-11 00:10:51,224 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-06-11 00:10:51,224 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-11 00:10:51,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-11 00:10:51,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:51,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-11 00:10:51,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,225 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,225 INFO L185 Difference]: Start difference. First operand has 53 places, 27 transitions, 279 flow. Second operand 6 states and 188 transitions. [2021-06-11 00:10:51,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 33 transitions, 389 flow [2021-06-11 00:10:51,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 33 transitions, 343 flow, removed 16 selfloop flow, removed 5 redundant places. [2021-06-11 00:10:51,229 INFO L241 Difference]: Finished difference. Result has 56 places, 29 transitions, 325 flow [2021-06-11 00:10:51,229 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=56, PETRI_TRANSITIONS=29} [2021-06-11 00:10:51,229 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 30 predicate places. [2021-06-11 00:10:51,229 INFO L480 AbstractCegarLoop]: Abstraction has has 56 places, 29 transitions, 325 flow [2021-06-11 00:10:51,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,230 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:51,230 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:51,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-11 00:10:51,230 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:51,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:51,230 INFO L82 PathProgramCache]: Analyzing trace with hash -452147191, now seen corresponding path program 7 times [2021-06-11 00:10:51,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:51,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857385053] [2021-06-11 00:10:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:51,268 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:51,269 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,270 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:51,275 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-11 00:10:51,276 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-11 00:10:51,288 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:51,288 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:51,306 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:51,307 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:51,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857385053] [2021-06-11 00:10:51,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:51,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:51,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655184440] [2021-06-11 00:10:51,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:51,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:51,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:51,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:51,327 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:51,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 29 transitions, 325 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:51,329 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:51,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:51,384 INFO L129 PetriNetUnfolder]: 6/87 cut-off events. [2021-06-11 00:10:51,384 INFO L130 PetriNetUnfolder]: For 536/565 co-relation queries the response was YES. [2021-06-11 00:10:51,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 87 events. 6/87 cut-off events. For 536/565 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 456 event pairs, 6 based on Foata normal form. 8/93 useless extension candidates. Maximal degree in co-relation 355. Up to 23 conditions per place. [2021-06-11 00:10:51,386 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 8 selfloop transitions, 12 changer transitions 4/32 dead transitions. [2021-06-11 00:10:51,386 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 32 transitions, 403 flow [2021-06-11 00:10:51,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:51,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-06-11 00:10:51,388 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7991452991452992 [2021-06-11 00:10:51,388 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-06-11 00:10:51,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-06-11 00:10:51,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:51,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-06-11 00:10:51,389 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) [2021-06-11 00:10:51,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,390 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,390 INFO L185 Difference]: Start difference. First operand has 56 places, 29 transitions, 325 flow. Second operand 6 states and 187 transitions. [2021-06-11 00:10:51,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 32 transitions, 403 flow [2021-06-11 00:10:51,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 32 transitions, 383 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-06-11 00:10:51,395 INFO L241 Difference]: Finished difference. Result has 60 places, 27 transitions, 313 flow [2021-06-11 00:10:51,396 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=60, PETRI_TRANSITIONS=27} [2021-06-11 00:10:51,396 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2021-06-11 00:10:51,396 INFO L480 AbstractCegarLoop]: Abstraction has has 60 places, 27 transitions, 313 flow [2021-06-11 00:10:51,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,396 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:51,396 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:51,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-11 00:10:51,396 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:51,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:51,397 INFO L82 PathProgramCache]: Analyzing trace with hash -455715067, now seen corresponding path program 8 times [2021-06-11 00:10:51,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:51,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81233131] [2021-06-11 00:10:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:51,426 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,427 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:51,427 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,428 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:51,436 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,436 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-11 00:10:51,445 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:51,446 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:51,462 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:51,463 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:51,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81233131] [2021-06-11 00:10:51,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:51,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:51,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722282904] [2021-06-11 00:10:51,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:51,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:51,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:51,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:51,480 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:51,481 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 27 transitions, 313 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:51,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:51,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:51,531 INFO L129 PetriNetUnfolder]: 5/83 cut-off events. [2021-06-11 00:10:51,531 INFO L130 PetriNetUnfolder]: For 489/509 co-relation queries the response was YES. [2021-06-11 00:10:51,531 INFO L84 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 83 events. 5/83 cut-off events. For 489/509 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 425 event pairs, 5 based on Foata normal form. 6/87 useless extension candidates. Maximal degree in co-relation 339. Up to 18 conditions per place. [2021-06-11 00:10:51,532 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 10 selfloop transitions, 10 changer transitions 2/30 dead transitions. [2021-06-11 00:10:51,532 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 30 transitions, 390 flow [2021-06-11 00:10:51,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:51,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:51,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-06-11 00:10:51,533 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7991452991452992 [2021-06-11 00:10:51,533 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-06-11 00:10:51,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-06-11 00:10:51,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:51,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-06-11 00:10:51,534 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) [2021-06-11 00:10:51,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,535 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,535 INFO L185 Difference]: Start difference. First operand has 60 places, 27 transitions, 313 flow. Second operand 6 states and 187 transitions. [2021-06-11 00:10:51,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 30 transitions, 390 flow [2021-06-11 00:10:51,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 30 transitions, 308 flow, removed 8 selfloop flow, removed 11 redundant places. [2021-06-11 00:10:51,539 INFO L241 Difference]: Finished difference. Result has 54 places, 27 transitions, 270 flow [2021-06-11 00:10:51,539 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=54, PETRI_TRANSITIONS=27} [2021-06-11 00:10:51,539 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2021-06-11 00:10:51,539 INFO L480 AbstractCegarLoop]: Abstraction has has 54 places, 27 transitions, 270 flow [2021-06-11 00:10:51,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,539 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:51,540 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:51,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-11 00:10:51,540 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:51,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:51,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2128638921, now seen corresponding path program 9 times [2021-06-11 00:10:51,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:51,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271313110] [2021-06-11 00:10:51,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:51,552 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,552 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:51,553 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,553 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:51,559 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,559 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-11 00:10:51,569 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:51,569 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:51,584 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:51,585 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:51,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271313110] [2021-06-11 00:10:51,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:51,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:51,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058893293] [2021-06-11 00:10:51,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:51,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:51,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:51,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:51,601 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:51,601 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 27 transitions, 270 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,602 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:51,602 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:51,602 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:51,658 INFO L129 PetriNetUnfolder]: 5/77 cut-off events. [2021-06-11 00:10:51,658 INFO L130 PetriNetUnfolder]: For 292/306 co-relation queries the response was YES. [2021-06-11 00:10:51,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 77 events. 5/77 cut-off events. For 292/306 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 375 event pairs, 5 based on Foata normal form. 5/80 useless extension candidates. Maximal degree in co-relation 293. Up to 18 conditions per place. [2021-06-11 00:10:51,659 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 11 selfloop transitions, 9 changer transitions 3/31 dead transitions. [2021-06-11 00:10:51,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 31 transitions, 350 flow [2021-06-11 00:10:51,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:51,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-11 00:10:51,660 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-06-11 00:10:51,660 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-11 00:10:51,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-11 00:10:51,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:51,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-11 00:10:51,661 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) [2021-06-11 00:10:51,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,662 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,662 INFO L185 Difference]: Start difference. First operand has 54 places, 27 transitions, 270 flow. Second operand 6 states and 188 transitions. [2021-06-11 00:10:51,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 31 transitions, 350 flow [2021-06-11 00:10:51,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 31 transitions, 322 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-06-11 00:10:51,664 INFO L241 Difference]: Finished difference. Result has 55 places, 26 transitions, 263 flow [2021-06-11 00:10:51,664 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=263, PETRI_PLACES=55, PETRI_TRANSITIONS=26} [2021-06-11 00:10:51,665 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 29 predicate places. [2021-06-11 00:10:51,665 INFO L480 AbstractCegarLoop]: Abstraction has has 55 places, 26 transitions, 263 flow [2021-06-11 00:10:51,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,665 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:51,665 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:51,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-11 00:10:51,665 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:51,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:51,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2084936939, now seen corresponding path program 10 times [2021-06-11 00:10:51,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:51,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855846000] [2021-06-11 00:10:51,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:51,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:51,680 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:51,686 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-11 00:10:51,687 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-11 00:10:51,697 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-11 00:10:51,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-11 00:10:51,716 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:51,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:51,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855846000] [2021-06-11 00:10:51,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:51,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:51,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314855622] [2021-06-11 00:10:51,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:51,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:51,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:51,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:51,734 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:51,734 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 26 transitions, 263 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,734 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:51,734 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:51,734 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:51,775 INFO L129 PetriNetUnfolder]: 5/67 cut-off events. [2021-06-11 00:10:51,776 INFO L130 PetriNetUnfolder]: For 232/232 co-relation queries the response was YES. [2021-06-11 00:10:51,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 67 events. 5/67 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 311 event pairs, 1 based on Foata normal form. 1/67 useless extension candidates. Maximal degree in co-relation 256. Up to 14 conditions per place. [2021-06-11 00:10:51,776 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 13 selfloop transitions, 8 changer transitions 2/31 dead transitions. [2021-06-11 00:10:51,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 31 transitions, 345 flow [2021-06-11 00:10:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:51,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-11 00:10:51,778 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-06-11 00:10:51,778 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-11 00:10:51,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-11 00:10:51,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:51,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-11 00:10:51,779 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) [2021-06-11 00:10:51,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,779 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,779 INFO L185 Difference]: Start difference. First operand has 55 places, 26 transitions, 263 flow. Second operand 6 states and 188 transitions. [2021-06-11 00:10:51,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 31 transitions, 345 flow [2021-06-11 00:10:51,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 31 transitions, 323 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-06-11 00:10:51,782 INFO L241 Difference]: Finished difference. Result has 58 places, 25 transitions, 252 flow [2021-06-11 00:10:51,782 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=58, PETRI_TRANSITIONS=25} [2021-06-11 00:10:51,782 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 32 predicate places. [2021-06-11 00:10:51,782 INFO L480 AbstractCegarLoop]: Abstraction has has 58 places, 25 transitions, 252 flow [2021-06-11 00:10:51,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,782 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:51,782 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:51,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-11 00:10:51,783 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:51,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:51,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1473450575, now seen corresponding path program 11 times [2021-06-11 00:10:51,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:51,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453517277] [2021-06-11 00:10:51,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:51,795 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:51,796 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,796 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:51,802 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-11 00:10:51,803 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-11 00:10:51,814 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-11 00:10:51,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-11 00:10:51,833 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:51,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:51,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453517277] [2021-06-11 00:10:51,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:51,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:51,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472868543] [2021-06-11 00:10:51,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:51,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:51,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:51,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:51,854 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:51,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 25 transitions, 252 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:51,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:51,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:51,896 INFO L129 PetriNetUnfolder]: 3/78 cut-off events. [2021-06-11 00:10:51,897 INFO L130 PetriNetUnfolder]: For 283/283 co-relation queries the response was YES. [2021-06-11 00:10:51,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 78 events. 3/78 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 385 event pairs, 1 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 286. Up to 18 conditions per place. [2021-06-11 00:10:51,897 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 16 selfloop transitions, 8 changer transitions 2/34 dead transitions. [2021-06-11 00:10:51,897 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 34 transitions, 404 flow [2021-06-11 00:10:51,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:51,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:51,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-11 00:10:51,899 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-06-11 00:10:51,899 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-11 00:10:51,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-11 00:10:51,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:51,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-11 00:10:51,900 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) [2021-06-11 00:10:51,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,900 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,900 INFO L185 Difference]: Start difference. First operand has 58 places, 25 transitions, 252 flow. Second operand 6 states and 188 transitions. [2021-06-11 00:10:51,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 34 transitions, 404 flow [2021-06-11 00:10:51,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 34 transitions, 359 flow, removed 11 selfloop flow, removed 5 redundant places. [2021-06-11 00:10:51,903 INFO L241 Difference]: Finished difference. Result has 60 places, 27 transitions, 277 flow [2021-06-11 00:10:51,903 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=60, PETRI_TRANSITIONS=27} [2021-06-11 00:10:51,903 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2021-06-11 00:10:51,903 INFO L480 AbstractCegarLoop]: Abstraction has has 60 places, 27 transitions, 277 flow [2021-06-11 00:10:51,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,904 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:51,904 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:51,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-11 00:10:51,904 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:51,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:51,904 INFO L82 PathProgramCache]: Analyzing trace with hash 476805071, now seen corresponding path program 12 times [2021-06-11 00:10:51,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:51,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464033120] [2021-06-11 00:10:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:51,921 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,922 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:51,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:51,922 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:51,928 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:51,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:51,944 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-11 00:10:51,944 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-11 00:10:51,959 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:51,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:51,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464033120] [2021-06-11 00:10:51,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:51,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:51,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650110300] [2021-06-11 00:10:51,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:51,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:51,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:51,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:51,975 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:51,975 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 27 transitions, 277 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:51,975 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:51,975 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:51,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:52,018 INFO L129 PetriNetUnfolder]: 1/91 cut-off events. [2021-06-11 00:10:52,018 INFO L130 PetriNetUnfolder]: For 360/363 co-relation queries the response was YES. [2021-06-11 00:10:52,019 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 91 events. 1/91 cut-off events. For 360/363 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 519 event pairs, 1 based on Foata normal form. 1/91 useless extension candidates. Maximal degree in co-relation 341. Up to 20 conditions per place. [2021-06-11 00:10:52,019 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 16 selfloop transitions, 10 changer transitions 2/36 dead transitions. [2021-06-11 00:10:52,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 36 transitions, 442 flow [2021-06-11 00:10:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-11 00:10:52,020 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-06-11 00:10:52,020 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-11 00:10:52,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-11 00:10:52,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:52,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-11 00:10:52,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,022 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,022 INFO L185 Difference]: Start difference. First operand has 60 places, 27 transitions, 277 flow. Second operand 6 states and 188 transitions. [2021-06-11 00:10:52,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 36 transitions, 442 flow [2021-06-11 00:10:52,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 36 transitions, 420 flow, removed 6 selfloop flow, removed 4 redundant places. [2021-06-11 00:10:52,025 INFO L241 Difference]: Finished difference. Result has 64 places, 29 transitions, 334 flow [2021-06-11 00:10:52,026 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=64, PETRI_TRANSITIONS=29} [2021-06-11 00:10:52,026 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 38 predicate places. [2021-06-11 00:10:52,026 INFO L480 AbstractCegarLoop]: Abstraction has has 64 places, 29 transitions, 334 flow [2021-06-11 00:10:52,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,026 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:52,026 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:52,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-11 00:10:52,026 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:52,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:52,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1221507569, now seen corresponding path program 13 times [2021-06-11 00:10:52,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:52,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389936502] [2021-06-11 00:10:52,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:52,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:52,043 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:52,048 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:52,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:52,065 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-11 00:10:52,065 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-11 00:10:52,078 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:52,079 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:52,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389936502] [2021-06-11 00:10:52,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:52,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:52,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898710147] [2021-06-11 00:10:52,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:52,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:52,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:52,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:52,093 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:52,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 29 transitions, 334 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:52,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:52,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:52,129 INFO L129 PetriNetUnfolder]: 1/84 cut-off events. [2021-06-11 00:10:52,129 INFO L130 PetriNetUnfolder]: For 384/384 co-relation queries the response was YES. [2021-06-11 00:10:52,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 84 events. 1/84 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 458 event pairs, 0 based on Foata normal form. 1/85 useless extension candidates. Maximal degree in co-relation 344. Up to 19 conditions per place. [2021-06-11 00:10:52,129 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 18 selfloop transitions, 10 changer transitions 2/38 dead transitions. [2021-06-11 00:10:52,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 38 transitions, 506 flow [2021-06-11 00:10:52,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-11 00:10:52,131 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-06-11 00:10:52,131 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-11 00:10:52,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-11 00:10:52,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:52,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-11 00:10:52,131 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) [2021-06-11 00:10:52,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,132 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,132 INFO L185 Difference]: Start difference. First operand has 64 places, 29 transitions, 334 flow. Second operand 6 states and 188 transitions. [2021-06-11 00:10:52,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 38 transitions, 506 flow [2021-06-11 00:10:52,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 38 transitions, 485 flow, removed 7 selfloop flow, removed 3 redundant places. [2021-06-11 00:10:52,135 INFO L241 Difference]: Finished difference. Result has 69 places, 31 transitions, 389 flow [2021-06-11 00:10:52,135 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=69, PETRI_TRANSITIONS=31} [2021-06-11 00:10:52,135 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 43 predicate places. [2021-06-11 00:10:52,136 INFO L480 AbstractCegarLoop]: Abstraction has has 69 places, 31 transitions, 389 flow [2021-06-11 00:10:52,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,136 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:52,136 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:52,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-11 00:10:52,136 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:52,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:52,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2080382099, now seen corresponding path program 14 times [2021-06-11 00:10:52,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:52,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063185755] [2021-06-11 00:10:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:52,148 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,149 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:52,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:52,155 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:52,156 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:52,172 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-11 00:10:52,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-11 00:10:52,194 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:52,194 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:52,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063185755] [2021-06-11 00:10:52,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:52,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:52,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382245729] [2021-06-11 00:10:52,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:52,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:52,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:52,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:52,209 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:52,210 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 31 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,210 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:52,210 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:52,210 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:52,243 INFO L129 PetriNetUnfolder]: 1/77 cut-off events. [2021-06-11 00:10:52,243 INFO L130 PetriNetUnfolder]: For 436/436 co-relation queries the response was YES. [2021-06-11 00:10:52,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 77 events. 1/77 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 396 event pairs, 0 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 338. Up to 19 conditions per place. [2021-06-11 00:10:52,244 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 16 selfloop transitions, 9 changer transitions 3/36 dead transitions. [2021-06-11 00:10:52,244 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 36 transitions, 504 flow [2021-06-11 00:10:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:52,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-06-11 00:10:52,249 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7991452991452992 [2021-06-11 00:10:52,249 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-06-11 00:10:52,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-06-11 00:10:52,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:52,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-06-11 00:10:52,251 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) [2021-06-11 00:10:52,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,252 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,252 INFO L185 Difference]: Start difference. First operand has 69 places, 31 transitions, 389 flow. Second operand 6 states and 187 transitions. [2021-06-11 00:10:52,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 36 transitions, 504 flow [2021-06-11 00:10:52,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 36 transitions, 485 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-06-11 00:10:52,258 INFO L241 Difference]: Finished difference. Result has 72 places, 30 transitions, 392 flow [2021-06-11 00:10:52,258 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=72, PETRI_TRANSITIONS=30} [2021-06-11 00:10:52,259 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2021-06-11 00:10:52,259 INFO L480 AbstractCegarLoop]: Abstraction has has 72 places, 30 transitions, 392 flow [2021-06-11 00:10:52,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,259 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:52,259 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:52,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-11 00:10:52,259 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:52,260 INFO L82 PathProgramCache]: Analyzing trace with hash -618143921, now seen corresponding path program 15 times [2021-06-11 00:10:52,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:52,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651034763] [2021-06-11 00:10:52,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:52,273 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:52,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,276 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:52,280 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,281 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-11 00:10:52,297 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-11 00:10:52,298 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-11 00:10:52,314 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:52,315 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:52,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651034763] [2021-06-11 00:10:52,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:52,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:52,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786830740] [2021-06-11 00:10:52,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:52,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:52,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:52,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:52,328 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:52,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 30 transitions, 392 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,329 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:52,329 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:52,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:52,372 INFO L129 PetriNetUnfolder]: 0/83 cut-off events. [2021-06-11 00:10:52,372 INFO L130 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2021-06-11 00:10:52,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 83 events. 0/83 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 447 event pairs, 0 based on Foata normal form. 1/83 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2021-06-11 00:10:52,373 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 18 selfloop transitions, 10 changer transitions 2/38 dead transitions. [2021-06-11 00:10:52,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 38 transitions, 571 flow [2021-06-11 00:10:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:52,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:52,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-11 00:10:52,374 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-06-11 00:10:52,374 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-11 00:10:52,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-11 00:10:52,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:52,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-11 00:10:52,375 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) [2021-06-11 00:10:52,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,376 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,376 INFO L185 Difference]: Start difference. First operand has 72 places, 30 transitions, 392 flow. Second operand 6 states and 188 transitions. [2021-06-11 00:10:52,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 38 transitions, 571 flow [2021-06-11 00:10:52,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 38 transitions, 539 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-06-11 00:10:52,379 INFO L241 Difference]: Finished difference. Result has 75 places, 33 transitions, 467 flow [2021-06-11 00:10:52,379 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=75, PETRI_TRANSITIONS=33} [2021-06-11 00:10:52,379 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 49 predicate places. [2021-06-11 00:10:52,380 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 33 transitions, 467 flow [2021-06-11 00:10:52,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,380 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:52,380 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:52,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-11 00:10:52,380 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:52,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:52,380 INFO L82 PathProgramCache]: Analyzing trace with hash -79698959, now seen corresponding path program 16 times [2021-06-11 00:10:52,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:52,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831945628] [2021-06-11 00:10:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:52,390 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:52,391 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,391 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:52,395 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,396 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-11 00:10:52,404 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-11 00:10:52,405 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-11 00:10:52,418 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:52,418 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:52,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831945628] [2021-06-11 00:10:52,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:52,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:52,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178412596] [2021-06-11 00:10:52,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:52,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:52,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:52,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:52,433 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:52,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 33 transitions, 467 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:52,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:52,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:52,468 INFO L129 PetriNetUnfolder]: 0/76 cut-off events. [2021-06-11 00:10:52,469 INFO L130 PetriNetUnfolder]: For 519/521 co-relation queries the response was YES. [2021-06-11 00:10:52,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 76 events. 0/76 cut-off events. For 519/521 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 390 event pairs, 0 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-06-11 00:10:52,469 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 16 selfloop transitions, 11 changer transitions 2/37 dead transitions. [2021-06-11 00:10:52,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 37 transitions, 564 flow [2021-06-11 00:10:52,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-11 00:10:52,470 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-06-11 00:10:52,470 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-11 00:10:52,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-11 00:10:52,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:52,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-11 00:10:52,471 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) [2021-06-11 00:10:52,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,472 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,472 INFO L185 Difference]: Start difference. First operand has 75 places, 33 transitions, 467 flow. Second operand 6 states and 188 transitions. [2021-06-11 00:10:52,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 37 transitions, 564 flow [2021-06-11 00:10:52,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 37 transitions, 551 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-06-11 00:10:52,475 INFO L241 Difference]: Finished difference. Result has 78 places, 32 transitions, 466 flow [2021-06-11 00:10:52,476 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=466, PETRI_PLACES=78, PETRI_TRANSITIONS=32} [2021-06-11 00:10:52,476 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 52 predicate places. [2021-06-11 00:10:52,476 INFO L480 AbstractCegarLoop]: Abstraction has has 78 places, 32 transitions, 466 flow [2021-06-11 00:10:52,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,476 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:52,476 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:52,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-11 00:10:52,476 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:52,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:52,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1798042665, now seen corresponding path program 17 times [2021-06-11 00:10:52,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:52,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686512071] [2021-06-11 00:10:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:52,486 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,486 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:52,487 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,487 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:52,492 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-11 00:10:52,501 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:52,502 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:52,516 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:52,517 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:52,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686512071] [2021-06-11 00:10:52,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:52,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:52,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675963836] [2021-06-11 00:10:52,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:52,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:52,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:52,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:52,531 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:52,532 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 32 transitions, 466 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:52,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:52,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:52,576 INFO L129 PetriNetUnfolder]: 0/69 cut-off events. [2021-06-11 00:10:52,576 INFO L130 PetriNetUnfolder]: For 582/588 co-relation queries the response was YES. [2021-06-11 00:10:52,577 INFO L84 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 69 events. 0/69 cut-off events. For 582/588 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 332 event pairs, 0 based on Foata normal form. 3/72 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-06-11 00:10:52,577 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 14 selfloop transitions, 8 changer transitions 4/34 dead transitions. [2021-06-11 00:10:52,577 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 34 transitions, 540 flow [2021-06-11 00:10:52,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:52,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2021-06-11 00:10:52,578 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2021-06-11 00:10:52,578 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 186 transitions. [2021-06-11 00:10:52,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 186 transitions. [2021-06-11 00:10:52,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:52,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 186 transitions. [2021-06-11 00:10:52,579 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) [2021-06-11 00:10:52,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,579 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,580 INFO L185 Difference]: Start difference. First operand has 78 places, 32 transitions, 466 flow. Second operand 6 states and 186 transitions. [2021-06-11 00:10:52,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 34 transitions, 540 flow [2021-06-11 00:10:52,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 34 transitions, 501 flow, removed 6 selfloop flow, removed 5 redundant places. [2021-06-11 00:10:52,584 INFO L241 Difference]: Finished difference. Result has 78 places, 29 transitions, 400 flow [2021-06-11 00:10:52,584 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=400, PETRI_PLACES=78, PETRI_TRANSITIONS=29} [2021-06-11 00:10:52,584 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 52 predicate places. [2021-06-11 00:10:52,584 INFO L480 AbstractCegarLoop]: Abstraction has has 78 places, 29 transitions, 400 flow [2021-06-11 00:10:52,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,584 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:52,584 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:52,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-11 00:10:52,584 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:52,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:52,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1632985331, now seen corresponding path program 18 times [2021-06-11 00:10:52,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:52,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051580668] [2021-06-11 00:10:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:52,594 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,594 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:52,595 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,595 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:52,600 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-11 00:10:52,600 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-11 00:10:52,610 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:52,611 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:52,625 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:52,625 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:52,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051580668] [2021-06-11 00:10:52,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:52,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:52,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892370247] [2021-06-11 00:10:52,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:52,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:52,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:52,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:52,641 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:52,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 29 transitions, 400 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:52,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:52,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:52,691 INFO L129 PetriNetUnfolder]: 0/60 cut-off events. [2021-06-11 00:10:52,692 INFO L130 PetriNetUnfolder]: For 402/402 co-relation queries the response was YES. [2021-06-11 00:10:52,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 60 events. 0/60 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 264 event pairs, 0 based on Foata normal form. 1/61 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-06-11 00:10:52,692 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 15 selfloop transitions, 8 changer transitions 2/33 dead transitions. [2021-06-11 00:10:52,692 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 33 transitions, 485 flow [2021-06-11 00:10:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-11 00:10:52,693 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-06-11 00:10:52,694 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-11 00:10:52,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-11 00:10:52,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:52,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-11 00:10:52,695 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) [2021-06-11 00:10:52,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,695 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,695 INFO L185 Difference]: Start difference. First operand has 78 places, 29 transitions, 400 flow. Second operand 6 states and 188 transitions. [2021-06-11 00:10:52,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 33 transitions, 485 flow [2021-06-11 00:10:52,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 33 transitions, 446 flow, removed 4 selfloop flow, removed 6 redundant places. [2021-06-11 00:10:52,699 INFO L241 Difference]: Finished difference. Result has 77 places, 29 transitions, 389 flow [2021-06-11 00:10:52,699 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=77, PETRI_TRANSITIONS=29} [2021-06-11 00:10:52,699 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 51 predicate places. [2021-06-11 00:10:52,699 INFO L480 AbstractCegarLoop]: Abstraction has has 77 places, 29 transitions, 389 flow [2021-06-11 00:10:52,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,699 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:52,699 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:52,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-11 00:10:52,699 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:52,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:52,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1346663061, now seen corresponding path program 19 times [2021-06-11 00:10:52,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:52,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653384803] [2021-06-11 00:10:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:52,709 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,710 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:52,711 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:52,716 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-11 00:10:52,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-11 00:10:52,726 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-11 00:10:52,726 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-11 00:10:52,739 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:52,740 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:52,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653384803] [2021-06-11 00:10:52,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:52,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:52,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941661300] [2021-06-11 00:10:52,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:52,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:52,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:52,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:52,755 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:52,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 29 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:52,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:52,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:52,797 INFO L129 PetriNetUnfolder]: 0/53 cut-off events. [2021-06-11 00:10:52,798 INFO L130 PetriNetUnfolder]: For 353/353 co-relation queries the response was YES. [2021-06-11 00:10:52,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 53 events. 0/53 cut-off events. For 353/353 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 208 event pairs, 0 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-06-11 00:10:52,798 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 13 selfloop transitions, 7 changer transitions 3/31 dead transitions. [2021-06-11 00:10:52,798 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 31 transitions, 443 flow [2021-06-11 00:10:52,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-06-11 00:10:52,799 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7991452991452992 [2021-06-11 00:10:52,799 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-06-11 00:10:52,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-06-11 00:10:52,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:52,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-06-11 00:10:52,800 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) [2021-06-11 00:10:52,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,801 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,801 INFO L185 Difference]: Start difference. First operand has 77 places, 29 transitions, 389 flow. Second operand 6 states and 187 transitions. [2021-06-11 00:10:52,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 31 transitions, 443 flow [2021-06-11 00:10:52,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 31 transitions, 433 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-06-11 00:10:52,825 INFO L241 Difference]: Finished difference. Result has 80 places, 26 transitions, 345 flow [2021-06-11 00:10:52,825 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=80, PETRI_TRANSITIONS=26} [2021-06-11 00:10:52,825 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 54 predicate places. [2021-06-11 00:10:52,825 INFO L480 AbstractCegarLoop]: Abstraction has has 80 places, 26 transitions, 345 flow [2021-06-11 00:10:52,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,825 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:52,826 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:52,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-11 00:10:52,826 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:52,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:52,826 INFO L82 PathProgramCache]: Analyzing trace with hash -897088213, now seen corresponding path program 20 times [2021-06-11 00:10:52,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:52,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409998993] [2021-06-11 00:10:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:52,849 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,850 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:52,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:52,856 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:52,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:52,874 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-11 00:10:52,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-11 00:10:52,893 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:52,896 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:52,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409998993] [2021-06-11 00:10:52,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:52,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:52,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071529390] [2021-06-11 00:10:52,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:52,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:52,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:52,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:52,916 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:52,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 26 transitions, 345 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:52,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:52,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:52,952 INFO L129 PetriNetUnfolder]: 0/45 cut-off events. [2021-06-11 00:10:52,952 INFO L130 PetriNetUnfolder]: For 306/306 co-relation queries the response was YES. [2021-06-11 00:10:52,952 INFO L84 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 45 events. 0/45 cut-off events. For 306/306 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 156 event pairs, 0 based on Foata normal form. 1/46 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-06-11 00:10:52,953 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 9 selfloop transitions, 7 changer transitions 3/27 dead transitions. [2021-06-11 00:10:52,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 27 transitions, 387 flow [2021-06-11 00:10:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:52,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2021-06-11 00:10:52,954 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2021-06-11 00:10:52,954 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 186 transitions. [2021-06-11 00:10:52,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 186 transitions. [2021-06-11 00:10:52,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:52,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 186 transitions. [2021-06-11 00:10:52,955 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) [2021-06-11 00:10:52,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,956 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,956 INFO L185 Difference]: Start difference. First operand has 80 places, 26 transitions, 345 flow. Second operand 6 states and 186 transitions. [2021-06-11 00:10:52,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 27 transitions, 387 flow [2021-06-11 00:10:52,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 27 transitions, 366 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-06-11 00:10:52,959 INFO L241 Difference]: Finished difference. Result has 79 places, 23 transitions, 286 flow [2021-06-11 00:10:52,959 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=79, PETRI_TRANSITIONS=23} [2021-06-11 00:10:52,959 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 53 predicate places. [2021-06-11 00:10:52,959 INFO L480 AbstractCegarLoop]: Abstraction has has 79 places, 23 transitions, 286 flow [2021-06-11 00:10:52,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:52,959 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:52,959 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:52,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-11 00:10:52,960 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:52,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:52,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1445521453, now seen corresponding path program 21 times [2021-06-11 00:10:52,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:52,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055302261] [2021-06-11 00:10:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:52,970 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,970 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:52,971 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:52,976 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:52,977 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-11 00:10:52,986 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:52,986 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:53,000 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:53,001 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:53,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055302261] [2021-06-11 00:10:53,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:53,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:53,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448653804] [2021-06-11 00:10:53,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:53,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:53,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:53,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:53,016 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:53,017 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 23 transitions, 286 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,017 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:53,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:53,017 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:53,058 INFO L129 PetriNetUnfolder]: 0/37 cut-off events. [2021-06-11 00:10:53,058 INFO L130 PetriNetUnfolder]: For 244/246 co-relation queries the response was YES. [2021-06-11 00:10:53,058 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 37 events. 0/37 cut-off events. For 244/246 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 101 event pairs, 0 based on Foata normal form. 2/39 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-06-11 00:10:53,059 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 8 selfloop transitions, 4 changer transitions 4/24 dead transitions. [2021-06-11 00:10:53,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 24 transitions, 322 flow [2021-06-11 00:10:53,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2021-06-11 00:10:53,060 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2021-06-11 00:10:53,060 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 186 transitions. [2021-06-11 00:10:53,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 186 transitions. [2021-06-11 00:10:53,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:53,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 186 transitions. [2021-06-11 00:10:53,061 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) [2021-06-11 00:10:53,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,062 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,062 INFO L185 Difference]: Start difference. First operand has 79 places, 23 transitions, 286 flow. Second operand 6 states and 186 transitions. [2021-06-11 00:10:53,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 24 transitions, 322 flow [2021-06-11 00:10:53,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 24 transitions, 267 flow, removed 4 selfloop flow, removed 11 redundant places. [2021-06-11 00:10:53,064 INFO L241 Difference]: Finished difference. Result has 68 places, 19 transitions, 187 flow [2021-06-11 00:10:53,064 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=68, PETRI_TRANSITIONS=19} [2021-06-11 00:10:53,065 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 42 predicate places. [2021-06-11 00:10:53,065 INFO L480 AbstractCegarLoop]: Abstraction has has 68 places, 19 transitions, 187 flow [2021-06-11 00:10:53,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,065 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:53,065 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:53,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-11 00:10:53,065 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:53,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:53,066 INFO L82 PathProgramCache]: Analyzing trace with hash 244298485, now seen corresponding path program 22 times [2021-06-11 00:10:53,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:53,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655684366] [2021-06-11 00:10:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:53,075 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:53,075 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:53,076 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:53,076 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:53,082 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-11 00:10:53,082 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-11 00:10:53,092 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:53,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:53,106 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:53,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:53,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655684366] [2021-06-11 00:10:53,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:53,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:53,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021383942] [2021-06-11 00:10:53,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:53,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:53,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:53,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:53,122 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:53,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 19 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:53,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:53,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:53,161 INFO L129 PetriNetUnfolder]: 0/28 cut-off events. [2021-06-11 00:10:53,161 INFO L130 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2021-06-11 00:10:53,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 28 events. 0/28 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 52 event pairs, 0 based on Foata normal form. 1/29 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-06-11 00:10:53,162 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 5 selfloop transitions, 3 changer transitions 3/19 dead transitions. [2021-06-11 00:10:53,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 19 transitions, 209 flow [2021-06-11 00:10:53,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2021-06-11 00:10:53,163 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.782051282051282 [2021-06-11 00:10:53,163 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 183 transitions. [2021-06-11 00:10:53,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 183 transitions. [2021-06-11 00:10:53,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:53,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 183 transitions. [2021-06-11 00:10:53,164 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) [2021-06-11 00:10:53,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,165 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,165 INFO L185 Difference]: Start difference. First operand has 68 places, 19 transitions, 187 flow. Second operand 6 states and 183 transitions. [2021-06-11 00:10:53,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 19 transitions, 209 flow [2021-06-11 00:10:53,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 19 transitions, 162 flow, removed 3 selfloop flow, removed 12 redundant places. [2021-06-11 00:10:53,166 INFO L241 Difference]: Finished difference. Result has 55 places, 16 transitions, 111 flow [2021-06-11 00:10:53,166 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=55, PETRI_TRANSITIONS=16} [2021-06-11 00:10:53,166 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 29 predicate places. [2021-06-11 00:10:53,166 INFO L480 AbstractCegarLoop]: Abstraction has has 55 places, 16 transitions, 111 flow [2021-06-11 00:10:53,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,167 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:53,167 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:53,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-11 00:10:53,167 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:53,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:53,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1958479669, now seen corresponding path program 23 times [2021-06-11 00:10:53,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:53,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383807315] [2021-06-11 00:10:53,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:53,177 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:53,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:53,178 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:53,179 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:53,183 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:53,184 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-11 00:10:53,192 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:53,192 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:53,204 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:53,205 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:53,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383807315] [2021-06-11 00:10:53,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:53,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:53,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584154906] [2021-06-11 00:10:53,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:53,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:53,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:53,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:53,219 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:53,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 16 transitions, 111 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:53,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:53,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:53,254 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-06-11 00:10:53,254 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2021-06-11 00:10:53,255 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 20 events. 0/20 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 19 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-11 00:10:53,255 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 3 selfloop transitions, 2 changer transitions 3/16 dead transitions. [2021-06-11 00:10:53,255 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 16 transitions, 127 flow [2021-06-11 00:10:53,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:53,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2021-06-11 00:10:53,256 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2021-06-11 00:10:53,256 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 182 transitions. [2021-06-11 00:10:53,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 182 transitions. [2021-06-11 00:10:53,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:53,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 182 transitions. [2021-06-11 00:10:53,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,257 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,257 INFO L185 Difference]: Start difference. First operand has 55 places, 16 transitions, 111 flow. Second operand 6 states and 182 transitions. [2021-06-11 00:10:53,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 16 transitions, 127 flow [2021-06-11 00:10:53,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 16 transitions, 100 flow, removed 4 selfloop flow, removed 8 redundant places. [2021-06-11 00:10:53,258 INFO L241 Difference]: Finished difference. Result has 48 places, 13 transitions, 61 flow [2021-06-11 00:10:53,258 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=61, PETRI_PLACES=48, PETRI_TRANSITIONS=13} [2021-06-11 00:10:53,258 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2021-06-11 00:10:53,259 INFO L480 AbstractCegarLoop]: Abstraction has has 48 places, 13 transitions, 61 flow [2021-06-11 00:10:53,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,259 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:10:53,259 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:10:53,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-11 00:10:53,259 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:10:53,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:10:53,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1484748849, now seen corresponding path program 24 times [2021-06-11 00:10:53,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:10:53,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371024013] [2021-06-11 00:10:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:10:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:10:53,268 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:53,268 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:10:53,269 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:53,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:10:53,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:10:53,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-11 00:10:53,282 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-11 00:10:53,284 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-11 00:10:53,300 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-11 00:10:53,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-11 00:10:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:10:53,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371024013] [2021-06-11 00:10:53,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:10:53,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-11 00:10:53,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118810591] [2021-06-11 00:10:53,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-11 00:10:53,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:10:53,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-11 00:10:53,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-11 00:10:53,316 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-06-11 00:10:53,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 13 transitions, 61 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:10:53,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-06-11 00:10:53,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:10:53,345 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-06-11 00:10:53,346 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-06-11 00:10:53,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 12 events. 0/12 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/13 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-11 00:10:53,346 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2021-06-11 00:10:53,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 12 transitions, 65 flow [2021-06-11 00:10:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-11 00:10:53,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-11 00:10:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2021-06-11 00:10:53,347 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7649572649572649 [2021-06-11 00:10:53,347 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 179 transitions. [2021-06-11 00:10:53,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 179 transitions. [2021-06-11 00:10:53,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:10:53,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 179 transitions. [2021-06-11 00:10:53,347 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) [2021-06-11 00:10:53,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,348 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,348 INFO L185 Difference]: Start difference. First operand has 48 places, 13 transitions, 61 flow. Second operand 6 states and 179 transitions. [2021-06-11 00:10:53,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 12 transitions, 65 flow [2021-06-11 00:10:53,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 12 transitions, 51 flow, removed 2 selfloop flow, removed 7 redundant places. [2021-06-11 00:10:53,348 INFO L241 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2021-06-11 00:10:53,349 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2021-06-11 00:10:53,349 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 11 predicate places. [2021-06-11 00:10:53,349 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2021-06-11 00:10:53,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:10:53,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-11 00:10:53,352 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.06 12:10:53 BasicIcfg [2021-06-11 00:10:53,352 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-11 00:10:53,353 INFO L168 Benchmark]: Toolchain (without parser) took 4237.14 ms. Allocated memory was 325.1 MB in the beginning and 396.4 MB in the end (delta: 71.3 MB). Free memory was 305.0 MB in the beginning and 270.5 MB in the end (delta: 34.5 MB). Peak memory consumption was 106.7 MB. Max. memory is 16.0 GB. [2021-06-11 00:10:53,353 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 325.1 MB. Free memory was 306.0 MB in the beginning and 305.9 MB in the end (delta: 70.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-11 00:10:53,353 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.19 ms. Allocated memory is still 325.1 MB. Free memory was 304.9 MB in the beginning and 303.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-11 00:10:53,353 INFO L168 Benchmark]: Boogie Preprocessor took 11.76 ms. Allocated memory is still 325.1 MB. Free memory was 303.4 MB in the beginning and 302.6 MB in the end (delta: 874.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-11 00:10:53,353 INFO L168 Benchmark]: RCFGBuilder took 197.35 ms. Allocated memory is still 325.1 MB. Free memory was 302.5 MB in the beginning and 293.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-11 00:10:53,354 INFO L168 Benchmark]: TraceAbstraction took 4000.79 ms. Allocated memory was 325.1 MB in the beginning and 396.4 MB in the end (delta: 71.3 MB). Free memory was 292.7 MB in the beginning and 270.5 MB in the end (delta: 22.2 MB). Peak memory consumption was 94.1 MB. Max. memory is 16.0 GB. [2021-06-11 00:10:53,354 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 0.12 ms. Allocated memory is still 325.1 MB. Free memory was 306.0 MB in the beginning and 305.9 MB in the end (delta: 70.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.19 ms. Allocated memory is still 325.1 MB. Free memory was 304.9 MB in the beginning and 303.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.76 ms. Allocated memory is still 325.1 MB. Free memory was 303.4 MB in the beginning and 302.6 MB in the end (delta: 874.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 197.35 ms. Allocated memory is still 325.1 MB. Free memory was 302.5 MB in the beginning and 293.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4000.79 ms. Allocated memory was 325.1 MB in the beginning and 396.4 MB in the end (delta: 71.3 MB). Free memory was 292.7 MB in the beginning and 270.5 MB in the end (delta: 22.2 MB). Peak memory consumption was 94.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 121.9ms, 30 PlacesBefore, 26 PlacesAfterwards, 29 TransitionsBefore, 25 TransitionsAfterwards, 216 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 66 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 66, positive: 66, positive conditional: 0, positive unconditional: 66, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 66, positive: 66, positive conditional: 0, positive unconditional: 66, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 66, positive: 66, positive conditional: 0, positive unconditional: 66, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 66, positive: 66, positive conditional: 0, positive unconditional: 66, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 66, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 66, unknown conditional: 0, unknown unconditional: 66] , Statistics on independence cache: Total cache size (in pairs): 78, Positive cache size: 78, Positive conditional cache size: 0, Positive unconditional cache size: 78, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 12.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3896.4ms, OverallIterations: 27, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1507.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 203.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 197 SDtfs, 247 SDslu, 128 SDs, 0 SdLazy, 358 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 291.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1474.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=467occurred in iteration=18, InterpolantAutomatonStates: 153, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 23.7ms SsaConstructionTime, 98.4ms SatisfiabilityAnalysisTime, 1786.7ms InterpolantComputationTime, 351 NumberOfCodeBlocks, 351 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 324 ConstructedInterpolants, 0 QuantifiedInterpolants, 4346 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 27 InterpolantComputations, 27 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...