/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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 13:57:11,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 13:57:11,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 13:57:11,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 13:57:11,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 13:57:11,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 13:57:11,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 13:57:11,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 13:57:11,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 13:57:11,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 13:57:11,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 13:57:11,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 13:57:11,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 13:57:11,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 13:57:11,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 13:57:11,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 13:57:11,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 13:57:11,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 13:57:11,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 13:57:11,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 13:57:11,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 13:57:11,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 13:57:11,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 13:57:11,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 13:57:11,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 13:57:11,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-24 13:57:11,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-24 13:57:11,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-24 13:57:11,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-24 13:57:11,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-24 13:57:11,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-24 13:57:11,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-24 13:57:11,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-24 13:57:11,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 13:57:11,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 13:57:11,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 13:57:11,456 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-VariableLbe.epf [2021-03-24 13:57:11,490 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 13:57:11,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 13:57:11,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 13:57:11,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 13:57:11,493 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 13:57:11,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 13:57:11,494 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 13:57:11,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 13:57:11,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 13:57:11,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 13:57:11,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 13:57:11,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 13:57:11,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 13:57:11,495 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 13:57:11,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 13:57:11,496 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 13:57:11,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 13:57:11,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 13:57:11,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 13:57:11,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 13:57:11,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 13:57:11,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 13:57:11,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 13:57:11,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 13:57:11,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 13:57:11,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 13:57:11,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 13:57:11,498 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 13:57:11,498 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 13:57:11,498 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 13:57:11,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 13:57:11,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 13:57:11,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 13:57:11,827 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 13:57:11,828 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 13:57:11,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl [2021-03-24 13:57:11,844 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl' [2021-03-24 13:57:11,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 13:57:11,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 13:57:11,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 13:57:11,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 13:57:11,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 13:57:11,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:11" (1/1) ... [2021-03-24 13:57:11,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:11" (1/1) ... [2021-03-24 13:57:11,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 13:57:11,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 13:57:11,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 13:57:11,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 13:57:11,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:11" (1/1) ... [2021-03-24 13:57:11,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:11" (1/1) ... [2021-03-24 13:57:11,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:11" (1/1) ... [2021-03-24 13:57:11,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:11" (1/1) ... [2021-03-24 13:57:11,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:11" (1/1) ... [2021-03-24 13:57:11,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:11" (1/1) ... [2021-03-24 13:57:11,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:11" (1/1) ... [2021-03-24 13:57:11,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 13:57:11,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 13:57:11,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 13:57:11,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 13:57:11,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 13:57:11,966 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-24 13:57:11,966 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-24 13:57:11,966 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-24 13:57:11,966 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-24 13:57:11,966 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-24 13:57:11,966 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-24 13:57:11,966 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 13:57:11,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 13:57:11,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 13:57:11,967 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 13:57:12,093 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 13:57:12,094 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 13:57:12,099 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:57:12 BoogieIcfgContainer [2021-03-24 13:57:12,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 13:57:12,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 13:57:12,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 13:57:12,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 13:57:12,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:11" (1/2) ... [2021-03-24 13:57:12,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@390c8363 and model type security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 01:57:12, skipping insertion in model container [2021-03-24 13:57:12,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:57:12" (2/2) ... [2021-03-24 13:57:12,106 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.bpl [2021-03-24 13:57:12,110 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 13:57:12,113 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 13:57:12,114 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 13:57:12,139 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-24 13:57:12,154 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-24 13:57:12,171 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 13:57:12,172 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 13:57:12,172 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 13:57:12,172 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 13:57:12,172 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 13:57:12,172 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 13:57:12,172 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 13:57:12,172 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 13:57:12,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 72 flow [2021-03-24 13:57:12,200 INFO L129 PetriNetUnfolder]: 4/26 cut-off events. [2021-03-24 13:57:12,201 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 13:57:12,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 4/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2021-03-24 13:57:12,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 28 transitions, 72 flow [2021-03-24 13:57:12,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 60 flow [2021-03-24 13:57:12,208 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 13:57:12,215 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 27 places, 24 transitions, 60 flow [2021-03-24 13:57:12,217 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 27 places, 24 transitions, 60 flow [2021-03-24 13:57:12,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 24 transitions, 60 flow [2021-03-24 13:57:12,227 INFO L129 PetriNetUnfolder]: 4/24 cut-off events. [2021-03-24 13:57:12,227 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 13:57:12,228 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 4/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 34 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2021-03-24 13:57:12,230 INFO L142 LiptonReduction]: Number of co-enabled transitions 198 [2021-03-24 13:57:12,511 INFO L154 LiptonReduction]: Checked pairs total: 91 [2021-03-24 13:57:12,512 INFO L156 LiptonReduction]: Total number of compositions: 14 [2021-03-24 13:57:12,514 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 307 [2021-03-24 13:57:12,527 INFO L129 PetriNetUnfolder]: 2/13 cut-off events. [2021-03-24 13:57:12,528 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 13:57:12,528 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:12,528 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:12,528 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:12,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1996779473, now seen corresponding path program 1 times [2021-03-24 13:57:12,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:12,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281447857] [2021-03-24 13:57:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:12,699 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:12,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:12,710 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:12,712 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:12,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:12,727 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:12,737 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:12,737 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:12,751 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:12,753 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-24 13:57:12,772 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:12,773 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:12,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281447857] [2021-03-24 13:57:12,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:12,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-24 13:57:12,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827931667] [2021-03-24 13:57:12,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 13:57:12,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:12,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 13:57:12,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-24 13:57:12,813 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:12,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 40 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:12,816 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:12,816 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:12,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:12,952 INFO L129 PetriNetUnfolder]: 18/55 cut-off events. [2021-03-24 13:57:12,953 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-03-24 13:57:12,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 55 events. 18/55 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 183 event pairs, 6 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 94. Up to 23 conditions per place. [2021-03-24 13:57:12,957 INFO L132 encePairwiseOnDemand]: 37/42 looper letters, 14 selfloop transitions, 2 changer transitions 2/24 dead transitions. [2021-03-24 13:57:12,957 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 96 flow [2021-03-24 13:57:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:57:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:57:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2021-03-24 13:57:12,976 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2021-03-24 13:57:12,976 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 91 transitions. [2021-03-24 13:57:12,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 91 transitions. [2021-03-24 13:57:12,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:12,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 91 transitions. [2021-03-24 13:57:12,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:12,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:12,989 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:12,991 INFO L185 Difference]: Start difference. First operand has 19 places, 14 transitions, 40 flow. Second operand 6 states and 91 transitions. [2021-03-24 13:57:12,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 96 flow [2021-03-24 13:57:12,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-24 13:57:12,999 INFO L241 Difference]: Finished difference. Result has 24 places, 15 transitions, 49 flow [2021-03-24 13:57:13,000 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=49, PETRI_PLACES=24, PETRI_TRANSITIONS=15} [2021-03-24 13:57:13,002 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2021-03-24 13:57:13,002 INFO L480 AbstractCegarLoop]: Abstraction has has 24 places, 15 transitions, 49 flow [2021-03-24 13:57:13,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,002 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:13,002 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:13,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 13:57:13,003 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:13,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:13,003 INFO L82 PathProgramCache]: Analyzing trace with hash -248692449, now seen corresponding path program 2 times [2021-03-24 13:57:13,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:13,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997310242] [2021-03-24 13:57:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:13,028 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,029 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:13,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:13,037 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,038 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:13,045 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,046 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-24 13:57:13,056 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,056 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:13,067 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:13,067 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:13,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997310242] [2021-03-24 13:57:13,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:13,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-24 13:57:13,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602375906] [2021-03-24 13:57:13,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 13:57:13,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:13,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 13:57:13,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-24 13:57:13,080 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:13,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 15 transitions, 49 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:13,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:13,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:13,215 INFO L129 PetriNetUnfolder]: 22/78 cut-off events. [2021-03-24 13:57:13,216 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2021-03-24 13:57:13,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 78 events. 22/78 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 318 event pairs, 12 based on Foata normal form. 1/75 useless extension candidates. Maximal degree in co-relation 177. Up to 35 conditions per place. [2021-03-24 13:57:13,221 INFO L132 encePairwiseOnDemand]: 37/42 looper letters, 18 selfloop transitions, 2 changer transitions 3/29 dead transitions. [2021-03-24 13:57:13,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 149 flow [2021-03-24 13:57:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:57:13,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:57:13,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2021-03-24 13:57:13,229 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2021-03-24 13:57:13,229 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 93 transitions. [2021-03-24 13:57:13,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 93 transitions. [2021-03-24 13:57:13,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:13,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 93 transitions. [2021-03-24 13:57:13,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,233 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,234 INFO L185 Difference]: Start difference. First operand has 24 places, 15 transitions, 49 flow. Second operand 6 states and 93 transitions. [2021-03-24 13:57:13,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 149 flow [2021-03-24 13:57:13,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 29 transitions, 138 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-03-24 13:57:13,239 INFO L241 Difference]: Finished difference. Result has 28 places, 16 transitions, 61 flow [2021-03-24 13:57:13,240 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=61, PETRI_PLACES=28, PETRI_TRANSITIONS=16} [2021-03-24 13:57:13,240 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 9 predicate places. [2021-03-24 13:57:13,240 INFO L480 AbstractCegarLoop]: Abstraction has has 28 places, 16 transitions, 61 flow [2021-03-24 13:57:13,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,241 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:13,241 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:13,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 13:57:13,241 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:13,242 INFO L82 PathProgramCache]: Analyzing trace with hash 430711591, now seen corresponding path program 3 times [2021-03-24 13:57:13,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:13,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321914931] [2021-03-24 13:57:13,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:13,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:13,275 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,276 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:13,283 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,283 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:13,300 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,300 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:13,316 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,316 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-24 13:57:13,326 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:13,327 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:13,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321914931] [2021-03-24 13:57:13,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:13,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-24 13:57:13,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562506272] [2021-03-24 13:57:13,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 13:57:13,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:13,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 13:57:13,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-24 13:57:13,337 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:13,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 16 transitions, 61 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:13,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:13,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:13,446 INFO L129 PetriNetUnfolder]: 22/88 cut-off events. [2021-03-24 13:57:13,446 INFO L130 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2021-03-24 13:57:13,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 88 events. 22/88 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 403 event pairs, 14 based on Foata normal form. 1/88 useless extension candidates. Maximal degree in co-relation 221. Up to 34 conditions per place. [2021-03-24 13:57:13,448 INFO L132 encePairwiseOnDemand]: 37/42 looper letters, 17 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2021-03-24 13:57:13,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 154 flow [2021-03-24 13:57:13,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:57:13,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:57:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2021-03-24 13:57:13,452 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2021-03-24 13:57:13,452 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 92 transitions. [2021-03-24 13:57:13,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 92 transitions. [2021-03-24 13:57:13,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:13,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 92 transitions. [2021-03-24 13:57:13,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,456 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,456 INFO L185 Difference]: Start difference. First operand has 28 places, 16 transitions, 61 flow. Second operand 6 states and 92 transitions. [2021-03-24 13:57:13,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 154 flow [2021-03-24 13:57:13,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 142 flow, removed 5 selfloop flow, removed 3 redundant places. [2021-03-24 13:57:13,458 INFO L241 Difference]: Finished difference. Result has 32 places, 18 transitions, 87 flow [2021-03-24 13:57:13,458 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=87, PETRI_PLACES=32, PETRI_TRANSITIONS=18} [2021-03-24 13:57:13,459 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 13 predicate places. [2021-03-24 13:57:13,459 INFO L480 AbstractCegarLoop]: Abstraction has has 32 places, 18 transitions, 87 flow [2021-03-24 13:57:13,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,459 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:13,459 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:13,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 13:57:13,459 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:13,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2142506319, now seen corresponding path program 4 times [2021-03-24 13:57:13,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:13,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175177533] [2021-03-24 13:57:13,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:13,497 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,498 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:13,499 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,499 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:13,505 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,506 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:13,524 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,527 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:13,538 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,541 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-24 13:57:13,553 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:13,554 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:13,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175177533] [2021-03-24 13:57:13,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:13,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-24 13:57:13,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783703450] [2021-03-24 13:57:13,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 13:57:13,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:13,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 13:57:13,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-24 13:57:13,563 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:13,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 18 transitions, 87 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:13,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:13,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:13,655 INFO L129 PetriNetUnfolder]: 21/85 cut-off events. [2021-03-24 13:57:13,655 INFO L130 PetriNetUnfolder]: For 146/148 co-relation queries the response was YES. [2021-03-24 13:57:13,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 85 events. 21/85 cut-off events. For 146/148 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 377 event pairs, 13 based on Foata normal form. 1/83 useless extension candidates. Maximal degree in co-relation 238. Up to 35 conditions per place. [2021-03-24 13:57:13,656 INFO L132 encePairwiseOnDemand]: 37/42 looper letters, 17 selfloop transitions, 4 changer transitions 1/28 dead transitions. [2021-03-24 13:57:13,656 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 28 transitions, 182 flow [2021-03-24 13:57:13,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:57:13,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:57:13,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2021-03-24 13:57:13,657 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2021-03-24 13:57:13,657 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 92 transitions. [2021-03-24 13:57:13,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 92 transitions. [2021-03-24 13:57:13,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:13,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 92 transitions. [2021-03-24 13:57:13,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,659 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,659 INFO L185 Difference]: Start difference. First operand has 32 places, 18 transitions, 87 flow. Second operand 6 states and 92 transitions. [2021-03-24 13:57:13,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 28 transitions, 182 flow [2021-03-24 13:57:13,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 28 transitions, 174 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-24 13:57:13,661 INFO L241 Difference]: Finished difference. Result has 38 places, 20 transitions, 122 flow [2021-03-24 13:57:13,662 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=122, PETRI_PLACES=38, PETRI_TRANSITIONS=20} [2021-03-24 13:57:13,662 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 19 predicate places. [2021-03-24 13:57:13,662 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 20 transitions, 122 flow [2021-03-24 13:57:13,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,662 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:13,662 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:13,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 13:57:13,663 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:13,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:13,663 INFO L82 PathProgramCache]: Analyzing trace with hash 440975071, now seen corresponding path program 5 times [2021-03-24 13:57:13,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:13,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712909830] [2021-03-24 13:57:13,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:13,683 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:13,684 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,684 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:13,690 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,690 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:13,695 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,695 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:13,702 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:13,709 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:13,710 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:13,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712909830] [2021-03-24 13:57:13,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:13,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-24 13:57:13,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283550628] [2021-03-24 13:57:13,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 13:57:13,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:13,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 13:57:13,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-24 13:57:13,727 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:13,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 20 transitions, 122 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,727 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:13,727 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:13,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:13,823 INFO L129 PetriNetUnfolder]: 21/85 cut-off events. [2021-03-24 13:57:13,823 INFO L130 PetriNetUnfolder]: For 235/235 co-relation queries the response was YES. [2021-03-24 13:57:13,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 85 events. 21/85 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 383 event pairs, 13 based on Foata normal form. 1/85 useless extension candidates. Maximal degree in co-relation 261. Up to 34 conditions per place. [2021-03-24 13:57:13,824 INFO L132 encePairwiseOnDemand]: 37/42 looper letters, 15 selfloop transitions, 2 changer transitions 6/29 dead transitions. [2021-03-24 13:57:13,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 29 transitions, 214 flow [2021-03-24 13:57:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:57:13,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:57:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2021-03-24 13:57:13,825 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2021-03-24 13:57:13,825 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 92 transitions. [2021-03-24 13:57:13,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 92 transitions. [2021-03-24 13:57:13,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:13,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 92 transitions. [2021-03-24 13:57:13,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,827 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,827 INFO L185 Difference]: Start difference. First operand has 38 places, 20 transitions, 122 flow. Second operand 6 states and 92 transitions. [2021-03-24 13:57:13,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 29 transitions, 214 flow [2021-03-24 13:57:13,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 29 transitions, 206 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-24 13:57:13,830 INFO L241 Difference]: Finished difference. Result has 42 places, 18 transitions, 102 flow [2021-03-24 13:57:13,831 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=18} [2021-03-24 13:57:13,831 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 23 predicate places. [2021-03-24 13:57:13,831 INFO L480 AbstractCegarLoop]: Abstraction has has 42 places, 18 transitions, 102 flow [2021-03-24 13:57:13,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,831 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:13,831 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:13,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 13:57:13,832 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:13,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:13,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2132675289, now seen corresponding path program 6 times [2021-03-24 13:57:13,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:13,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894817668] [2021-03-24 13:57:13,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:13,856 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:13,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:13,864 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:13,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:13,880 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:13,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:13,893 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:13,895 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:13,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894817668] [2021-03-24 13:57:13,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:13,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-24 13:57:13,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558676774] [2021-03-24 13:57:13,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 13:57:13,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:13,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 13:57:13,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-24 13:57:13,911 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:13,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 18 transitions, 102 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:13,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:13,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:13,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:14,002 INFO L129 PetriNetUnfolder]: 19/70 cut-off events. [2021-03-24 13:57:14,003 INFO L130 PetriNetUnfolder]: For 192/195 co-relation queries the response was YES. [2021-03-24 13:57:14,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 70 events. 19/70 cut-off events. For 192/195 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 271 event pairs, 12 based on Foata normal form. 1/68 useless extension candidates. Maximal degree in co-relation 221. Up to 35 conditions per place. [2021-03-24 13:57:14,004 INFO L132 encePairwiseOnDemand]: 37/42 looper letters, 13 selfloop transitions, 1 changer transitions 6/26 dead transitions. [2021-03-24 13:57:14,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 26 transitions, 180 flow [2021-03-24 13:57:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 13:57:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 13:57:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2021-03-24 13:57:14,005 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2021-03-24 13:57:14,005 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 92 transitions. [2021-03-24 13:57:14,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 92 transitions. [2021-03-24 13:57:14,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:14,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 92 transitions. [2021-03-24 13:57:14,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,007 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,007 INFO L185 Difference]: Start difference. First operand has 42 places, 18 transitions, 102 flow. Second operand 6 states and 92 transitions. [2021-03-24 13:57:14,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 26 transitions, 180 flow [2021-03-24 13:57:14,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 159 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-03-24 13:57:14,008 INFO L241 Difference]: Finished difference. Result has 38 places, 16 transitions, 72 flow [2021-03-24 13:57:14,009 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=72, PETRI_PLACES=38, PETRI_TRANSITIONS=16} [2021-03-24 13:57:14,009 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 19 predicate places. [2021-03-24 13:57:14,009 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 16 transitions, 72 flow [2021-03-24 13:57:14,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,009 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:14,009 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:14,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 13:57:14,009 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:14,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:14,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1162112408, now seen corresponding path program 1 times [2021-03-24 13:57:14,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:14,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135672481] [2021-03-24 13:57:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:14,028 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,028 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:14,029 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:14,035 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,036 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:14,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:14,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:14,056 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,057 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-24 13:57:14,066 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:14,068 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:14,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135672481] [2021-03-24 13:57:14,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:14,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:14,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239101246] [2021-03-24 13:57:14,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:14,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:14,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:14,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:14,078 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:14,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 16 transitions, 72 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:14,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:14,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:14,198 INFO L129 PetriNetUnfolder]: 21/74 cut-off events. [2021-03-24 13:57:14,198 INFO L130 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2021-03-24 13:57:14,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 74 events. 21/74 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 309 event pairs, 2 based on Foata normal form. 1/75 useless extension candidates. Maximal degree in co-relation 210. Up to 15 conditions per place. [2021-03-24 13:57:14,199 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 26 selfloop transitions, 6 changer transitions 2/39 dead transitions. [2021-03-24 13:57:14,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 272 flow [2021-03-24 13:57:14,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-24 13:57:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-03-24 13:57:14,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2021-03-24 13:57:14,201 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2021-03-24 13:57:14,201 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 140 transitions. [2021-03-24 13:57:14,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 140 transitions. [2021-03-24 13:57:14,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:14,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 140 transitions. [2021-03-24 13:57:14,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 14.0) internal successors, (140), 10 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,203 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,203 INFO L185 Difference]: Start difference. First operand has 38 places, 16 transitions, 72 flow. Second operand 10 states and 140 transitions. [2021-03-24 13:57:14,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 272 flow [2021-03-24 13:57:14,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 39 transitions, 229 flow, removed 16 selfloop flow, removed 6 redundant places. [2021-03-24 13:57:14,205 INFO L241 Difference]: Finished difference. Result has 40 places, 17 transitions, 85 flow [2021-03-24 13:57:14,205 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=85, PETRI_PLACES=40, PETRI_TRANSITIONS=17} [2021-03-24 13:57:14,205 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 21 predicate places. [2021-03-24 13:57:14,205 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 17 transitions, 85 flow [2021-03-24 13:57:14,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,205 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:14,205 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:14,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-24 13:57:14,206 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:14,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:14,206 INFO L82 PathProgramCache]: Analyzing trace with hash -942898600, now seen corresponding path program 2 times [2021-03-24 13:57:14,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:14,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005285918] [2021-03-24 13:57:14,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:14,219 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,219 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:14,220 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,220 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:14,225 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,226 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:14,231 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,231 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:14,237 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,237 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:14,245 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,246 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:14,255 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:14,256 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:14,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005285918] [2021-03-24 13:57:14,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:14,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:14,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791411910] [2021-03-24 13:57:14,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:14,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:14,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:14,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:14,271 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:14,272 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 17 transitions, 85 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:14,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:14,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:14,389 INFO L129 PetriNetUnfolder]: 20/74 cut-off events. [2021-03-24 13:57:14,389 INFO L130 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2021-03-24 13:57:14,389 INFO L84 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 74 events. 20/74 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 294 event pairs, 14 based on Foata normal form. 1/73 useless extension candidates. Maximal degree in co-relation 235. Up to 40 conditions per place. [2021-03-24 13:57:14,390 INFO L132 encePairwiseOnDemand]: 35/42 looper letters, 18 selfloop transitions, 2 changer transitions 4/29 dead transitions. [2021-03-24 13:57:14,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 29 transitions, 196 flow [2021-03-24 13:57:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 13:57:14,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 13:57:14,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2021-03-24 13:57:14,391 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.33035714285714285 [2021-03-24 13:57:14,391 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 111 transitions. [2021-03-24 13:57:14,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 111 transitions. [2021-03-24 13:57:14,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:14,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 111 transitions. [2021-03-24 13:57:14,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,393 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,393 INFO L185 Difference]: Start difference. First operand has 40 places, 17 transitions, 85 flow. Second operand 8 states and 111 transitions. [2021-03-24 13:57:14,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 29 transitions, 196 flow [2021-03-24 13:57:14,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 29 transitions, 167 flow, removed 7 selfloop flow, removed 6 redundant places. [2021-03-24 13:57:14,395 INFO L241 Difference]: Finished difference. Result has 44 places, 17 transitions, 86 flow [2021-03-24 13:57:14,395 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=86, PETRI_PLACES=44, PETRI_TRANSITIONS=17} [2021-03-24 13:57:14,395 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 25 predicate places. [2021-03-24 13:57:14,395 INFO L480 AbstractCegarLoop]: Abstraction has has 44 places, 17 transitions, 86 flow [2021-03-24 13:57:14,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,395 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:14,395 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:14,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-24 13:57:14,396 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:14,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:14,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1395509304, now seen corresponding path program 3 times [2021-03-24 13:57:14,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:14,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860061151] [2021-03-24 13:57:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:14,411 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:14,413 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:14,420 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:14,427 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,427 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:14,434 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,434 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:14,442 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,443 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-24 13:57:14,454 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:14,455 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:14,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860061151] [2021-03-24 13:57:14,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:14,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:14,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307355584] [2021-03-24 13:57:14,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:14,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:14,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:14,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:14,466 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:14,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 17 transitions, 86 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:14,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:14,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:14,590 INFO L129 PetriNetUnfolder]: 19/78 cut-off events. [2021-03-24 13:57:14,590 INFO L130 PetriNetUnfolder]: For 136/139 co-relation queries the response was YES. [2021-03-24 13:57:14,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 78 events. 19/78 cut-off events. For 136/139 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 322 event pairs, 4 based on Foata normal form. 2/79 useless extension candidates. Maximal degree in co-relation 250. Up to 18 conditions per place. [2021-03-24 13:57:14,591 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 23 selfloop transitions, 6 changer transitions 2/36 dead transitions. [2021-03-24 13:57:14,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 266 flow [2021-03-24 13:57:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:14,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:14,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2021-03-24 13:57:14,593 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.335978835978836 [2021-03-24 13:57:14,593 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 127 transitions. [2021-03-24 13:57:14,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 127 transitions. [2021-03-24 13:57:14,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:14,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 127 transitions. [2021-03-24 13:57:14,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,595 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,595 INFO L185 Difference]: Start difference. First operand has 44 places, 17 transitions, 86 flow. Second operand 9 states and 127 transitions. [2021-03-24 13:57:14,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 266 flow [2021-03-24 13:57:14,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 36 transitions, 238 flow, removed 7 selfloop flow, removed 6 redundant places. [2021-03-24 13:57:14,597 INFO L241 Difference]: Finished difference. Result has 46 places, 19 transitions, 116 flow [2021-03-24 13:57:14,597 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=116, PETRI_PLACES=46, PETRI_TRANSITIONS=19} [2021-03-24 13:57:14,597 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 27 predicate places. [2021-03-24 13:57:14,597 INFO L480 AbstractCegarLoop]: Abstraction has has 46 places, 19 transitions, 116 flow [2021-03-24 13:57:14,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,597 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:14,597 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:14,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-24 13:57:14,598 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:14,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:14,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1227503881, now seen corresponding path program 1 times [2021-03-24 13:57:14,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:14,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000718900] [2021-03-24 13:57:14,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:14,616 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,617 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:14,618 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,618 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:14,623 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:14,629 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,629 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 13:57:14,641 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,642 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:14,649 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,650 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:14,659 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:14,661 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:14,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000718900] [2021-03-24 13:57:14,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:14,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:14,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200619732] [2021-03-24 13:57:14,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:14,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:14,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:14,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:14,671 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:14,671 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 19 transitions, 116 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,671 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:14,671 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:14,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:14,767 INFO L129 PetriNetUnfolder]: 23/105 cut-off events. [2021-03-24 13:57:14,767 INFO L130 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2021-03-24 13:57:14,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 105 events. 23/105 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 503 event pairs, 13 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 321. Up to 45 conditions per place. [2021-03-24 13:57:14,768 INFO L132 encePairwiseOnDemand]: 36/42 looper letters, 22 selfloop transitions, 4 changer transitions 1/32 dead transitions. [2021-03-24 13:57:14,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 32 transitions, 218 flow [2021-03-24 13:57:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 13:57:14,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 13:57:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2021-03-24 13:57:14,769 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2021-03-24 13:57:14,769 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 109 transitions. [2021-03-24 13:57:14,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 109 transitions. [2021-03-24 13:57:14,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:14,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 109 transitions. [2021-03-24 13:57:14,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,770 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,770 INFO L185 Difference]: Start difference. First operand has 46 places, 19 transitions, 116 flow. Second operand 7 states and 109 transitions. [2021-03-24 13:57:14,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 32 transitions, 218 flow [2021-03-24 13:57:14,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 32 transitions, 202 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-03-24 13:57:14,772 INFO L241 Difference]: Finished difference. Result has 52 places, 22 transitions, 140 flow [2021-03-24 13:57:14,773 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=140, PETRI_PLACES=52, PETRI_TRANSITIONS=22} [2021-03-24 13:57:14,773 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 33 predicate places. [2021-03-24 13:57:14,773 INFO L480 AbstractCegarLoop]: Abstraction has has 52 places, 22 transitions, 140 flow [2021-03-24 13:57:14,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,773 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:14,773 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:14,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-24 13:57:14,773 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:14,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:14,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1540414110, now seen corresponding path program 4 times [2021-03-24 13:57:14,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:14,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347290091] [2021-03-24 13:57:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:14,785 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:14,786 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,786 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:14,790 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,791 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:14,796 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 13:57:14,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:14,855 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:14,856 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:14,869 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:14,870 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:14,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347290091] [2021-03-24 13:57:14,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:14,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:14,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650071036] [2021-03-24 13:57:14,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:14,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:14,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:14,879 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:14,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 22 transitions, 140 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:14,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:14,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:14,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:15,005 INFO L129 PetriNetUnfolder]: 22/130 cut-off events. [2021-03-24 13:57:15,005 INFO L130 PetriNetUnfolder]: For 264/266 co-relation queries the response was YES. [2021-03-24 13:57:15,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 130 events. 22/130 cut-off events. For 264/266 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 751 event pairs, 7 based on Foata normal form. 3/132 useless extension candidates. Maximal degree in co-relation 446. Up to 64 conditions per place. [2021-03-24 13:57:15,006 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 24 selfloop transitions, 6 changer transitions 3/39 dead transitions. [2021-03-24 13:57:15,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 39 transitions, 321 flow [2021-03-24 13:57:15,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 13:57:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 13:57:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2021-03-24 13:57:15,007 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2021-03-24 13:57:15,007 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 114 transitions. [2021-03-24 13:57:15,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 114 transitions. [2021-03-24 13:57:15,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:15,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 114 transitions. [2021-03-24 13:57:15,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,009 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,009 INFO L185 Difference]: Start difference. First operand has 52 places, 22 transitions, 140 flow. Second operand 8 states and 114 transitions. [2021-03-24 13:57:15,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 39 transitions, 321 flow [2021-03-24 13:57:15,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 39 transitions, 312 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-03-24 13:57:15,013 INFO L241 Difference]: Finished difference. Result has 62 places, 25 transitions, 197 flow [2021-03-24 13:57:15,013 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=197, PETRI_PLACES=62, PETRI_TRANSITIONS=25} [2021-03-24 13:57:15,013 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 43 predicate places. [2021-03-24 13:57:15,014 INFO L480 AbstractCegarLoop]: Abstraction has has 62 places, 25 transitions, 197 flow [2021-03-24 13:57:15,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,014 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:15,014 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:15,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-24 13:57:15,014 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:15,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:15,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1608422312, now seen corresponding path program 5 times [2021-03-24 13:57:15,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:15,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112336332] [2021-03-24 13:57:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:15,046 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,046 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:15,047 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,047 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:15,053 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,053 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:15,059 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,061 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 13:57:15,069 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,069 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:15,076 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,078 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:15,085 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:15,086 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:15,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112336332] [2021-03-24 13:57:15,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:15,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:15,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008868449] [2021-03-24 13:57:15,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:15,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:15,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:15,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:15,096 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:15,096 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 25 transitions, 197 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,096 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:15,096 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:15,096 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:15,208 INFO L129 PetriNetUnfolder]: 20/129 cut-off events. [2021-03-24 13:57:15,209 INFO L130 PetriNetUnfolder]: For 464/479 co-relation queries the response was YES. [2021-03-24 13:57:15,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 552 conditions, 129 events. 20/129 cut-off events. For 464/479 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 729 event pairs, 19 based on Foata normal form. 2/128 useless extension candidates. Maximal degree in co-relation 500. Up to 55 conditions per place. [2021-03-24 13:57:15,210 INFO L132 encePairwiseOnDemand]: 35/42 looper letters, 24 selfloop transitions, 7 changer transitions 1/38 dead transitions. [2021-03-24 13:57:15,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 38 transitions, 364 flow [2021-03-24 13:57:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 13:57:15,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 13:57:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2021-03-24 13:57:15,211 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.33630952380952384 [2021-03-24 13:57:15,211 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 113 transitions. [2021-03-24 13:57:15,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 113 transitions. [2021-03-24 13:57:15,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:15,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 113 transitions. [2021-03-24 13:57:15,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,213 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,213 INFO L185 Difference]: Start difference. First operand has 62 places, 25 transitions, 197 flow. Second operand 8 states and 113 transitions. [2021-03-24 13:57:15,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 38 transitions, 364 flow [2021-03-24 13:57:15,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 38 transitions, 341 flow, removed 10 selfloop flow, removed 3 redundant places. [2021-03-24 13:57:15,216 INFO L241 Difference]: Finished difference. Result has 70 places, 29 transitions, 256 flow [2021-03-24 13:57:15,216 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=256, PETRI_PLACES=70, PETRI_TRANSITIONS=29} [2021-03-24 13:57:15,216 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 51 predicate places. [2021-03-24 13:57:15,216 INFO L480 AbstractCegarLoop]: Abstraction has has 70 places, 29 transitions, 256 flow [2021-03-24 13:57:15,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,217 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:15,217 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:15,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-24 13:57:15,217 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:15,217 INFO L82 PathProgramCache]: Analyzing trace with hash 219936585, now seen corresponding path program 2 times [2021-03-24 13:57:15,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:15,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887505700] [2021-03-24 13:57:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:15,227 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:15,228 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,234 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:15,238 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,239 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:15,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,244 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:15,249 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,250 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:15,255 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,256 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:15,264 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:15,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:15,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887505700] [2021-03-24 13:57:15,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:15,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:15,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455730483] [2021-03-24 13:57:15,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:15,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:15,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:15,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:15,274 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:15,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 29 transitions, 256 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:15,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:15,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:15,388 INFO L129 PetriNetUnfolder]: 22/135 cut-off events. [2021-03-24 13:57:15,389 INFO L130 PetriNetUnfolder]: For 576/578 co-relation queries the response was YES. [2021-03-24 13:57:15,389 INFO L84 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 135 events. 22/135 cut-off events. For 576/578 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 774 event pairs, 4 based on Foata normal form. 1/136 useless extension candidates. Maximal degree in co-relation 559. Up to 81 conditions per place. [2021-03-24 13:57:15,390 INFO L132 encePairwiseOnDemand]: 35/42 looper letters, 28 selfloop transitions, 7 changer transitions 2/43 dead transitions. [2021-03-24 13:57:15,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 43 transitions, 423 flow [2021-03-24 13:57:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 13:57:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 13:57:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2021-03-24 13:57:15,391 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2021-03-24 13:57:15,392 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 106 transitions. [2021-03-24 13:57:15,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 106 transitions. [2021-03-24 13:57:15,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:15,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 106 transitions. [2021-03-24 13:57:15,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,393 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,393 INFO L185 Difference]: Start difference. First operand has 70 places, 29 transitions, 256 flow. Second operand 7 states and 106 transitions. [2021-03-24 13:57:15,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 43 transitions, 423 flow [2021-03-24 13:57:15,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 43 transitions, 408 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-03-24 13:57:15,399 INFO L241 Difference]: Finished difference. Result has 78 places, 31 transitions, 296 flow [2021-03-24 13:57:15,399 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=296, PETRI_PLACES=78, PETRI_TRANSITIONS=31} [2021-03-24 13:57:15,399 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 59 predicate places. [2021-03-24 13:57:15,399 INFO L480 AbstractCegarLoop]: Abstraction has has 78 places, 31 transitions, 296 flow [2021-03-24 13:57:15,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,400 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:15,400 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:15,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-24 13:57:15,400 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:15,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:15,400 INFO L82 PathProgramCache]: Analyzing trace with hash 624565784, now seen corresponding path program 6 times [2021-03-24 13:57:15,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:15,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334722049] [2021-03-24 13:57:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:15,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:15,416 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,416 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:15,420 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:15,425 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,426 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 13:57:15,433 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,433 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:15,442 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,443 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:15,453 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:15,453 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:15,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334722049] [2021-03-24 13:57:15,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:15,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:15,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905119894] [2021-03-24 13:57:15,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:15,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:15,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:15,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:15,462 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:15,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 31 transitions, 296 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:15,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:15,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:15,578 INFO L129 PetriNetUnfolder]: 18/129 cut-off events. [2021-03-24 13:57:15,579 INFO L130 PetriNetUnfolder]: For 657/665 co-relation queries the response was YES. [2021-03-24 13:57:15,579 INFO L84 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 129 events. 18/129 cut-off events. For 657/665 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 787 event pairs, 3 based on Foata normal form. 6/134 useless extension candidates. Maximal degree in co-relation 563. Up to 39 conditions per place. [2021-03-24 13:57:15,580 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 27 selfloop transitions, 10 changer transitions 4/47 dead transitions. [2021-03-24 13:57:15,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 47 transitions, 533 flow [2021-03-24 13:57:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 13:57:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 13:57:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2021-03-24 13:57:15,581 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2021-03-24 13:57:15,581 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 114 transitions. [2021-03-24 13:57:15,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 114 transitions. [2021-03-24 13:57:15,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:15,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 114 transitions. [2021-03-24 13:57:15,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,582 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,582 INFO L185 Difference]: Start difference. First operand has 78 places, 31 transitions, 296 flow. Second operand 8 states and 114 transitions. [2021-03-24 13:57:15,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 47 transitions, 533 flow [2021-03-24 13:57:15,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 47 transitions, 511 flow, removed 8 selfloop flow, removed 3 redundant places. [2021-03-24 13:57:15,587 INFO L241 Difference]: Finished difference. Result has 85 places, 33 transitions, 356 flow [2021-03-24 13:57:15,587 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=356, PETRI_PLACES=85, PETRI_TRANSITIONS=33} [2021-03-24 13:57:15,587 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 66 predicate places. [2021-03-24 13:57:15,587 INFO L480 AbstractCegarLoop]: Abstraction has has 85 places, 33 transitions, 356 flow [2021-03-24 13:57:15,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,587 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:15,587 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:15,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-24 13:57:15,587 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:15,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:15,588 INFO L82 PathProgramCache]: Analyzing trace with hash 978479224, now seen corresponding path program 7 times [2021-03-24 13:57:15,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:15,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794708753] [2021-03-24 13:57:15,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:15,597 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,598 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:15,598 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,598 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:15,602 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,603 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:15,608 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,609 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 13:57:15,616 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:15,623 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-24 13:57:15,632 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:15,633 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:15,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794708753] [2021-03-24 13:57:15,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:15,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:15,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516741544] [2021-03-24 13:57:15,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:15,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:15,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:15,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:15,642 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:15,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 33 transitions, 356 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:15,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:15,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:15,755 INFO L129 PetriNetUnfolder]: 17/127 cut-off events. [2021-03-24 13:57:15,756 INFO L130 PetriNetUnfolder]: For 785/803 co-relation queries the response was YES. [2021-03-24 13:57:15,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 127 events. 17/127 cut-off events. For 785/803 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 775 event pairs, 3 based on Foata normal form. 6/132 useless extension candidates. Maximal degree in co-relation 584. Up to 39 conditions per place. [2021-03-24 13:57:15,757 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 27 selfloop transitions, 11 changer transitions 2/46 dead transitions. [2021-03-24 13:57:15,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 46 transitions, 560 flow [2021-03-24 13:57:15,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 13:57:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 13:57:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2021-03-24 13:57:15,759 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.34226190476190477 [2021-03-24 13:57:15,759 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 115 transitions. [2021-03-24 13:57:15,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 115 transitions. [2021-03-24 13:57:15,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:15,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 115 transitions. [2021-03-24 13:57:15,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,760 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,760 INFO L185 Difference]: Start difference. First operand has 85 places, 33 transitions, 356 flow. Second operand 8 states and 115 transitions. [2021-03-24 13:57:15,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 46 transitions, 560 flow [2021-03-24 13:57:15,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 46 transitions, 523 flow, removed 13 selfloop flow, removed 4 redundant places. [2021-03-24 13:57:15,765 INFO L241 Difference]: Finished difference. Result has 90 places, 35 transitions, 393 flow [2021-03-24 13:57:15,766 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=393, PETRI_PLACES=90, PETRI_TRANSITIONS=35} [2021-03-24 13:57:15,766 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 71 predicate places. [2021-03-24 13:57:15,766 INFO L480 AbstractCegarLoop]: Abstraction has has 90 places, 35 transitions, 393 flow [2021-03-24 13:57:15,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,766 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:15,766 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:15,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-24 13:57:15,766 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:15,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:15,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1829779149, now seen corresponding path program 3 times [2021-03-24 13:57:15,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:15,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133056744] [2021-03-24 13:57:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:15,787 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,787 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:15,788 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,788 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:15,795 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:15,800 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,800 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:15,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,807 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:15,813 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,814 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:15,824 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:15,824 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:15,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133056744] [2021-03-24 13:57:15,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:15,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:15,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52718348] [2021-03-24 13:57:15,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:15,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:15,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:15,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:15,835 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:15,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 35 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:15,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:15,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:15,933 INFO L129 PetriNetUnfolder]: 19/136 cut-off events. [2021-03-24 13:57:15,933 INFO L130 PetriNetUnfolder]: For 828/836 co-relation queries the response was YES. [2021-03-24 13:57:15,934 INFO L84 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 136 events. 19/136 cut-off events. For 828/836 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 814 event pairs, 14 based on Foata normal form. 6/142 useless extension candidates. Maximal degree in co-relation 631. Up to 66 conditions per place. [2021-03-24 13:57:15,935 INFO L132 encePairwiseOnDemand]: 36/42 looper letters, 29 selfloop transitions, 5 changer transitions 3/43 dead transitions. [2021-03-24 13:57:15,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 43 transitions, 515 flow [2021-03-24 13:57:15,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 13:57:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 13:57:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2021-03-24 13:57:15,937 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2021-03-24 13:57:15,937 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 105 transitions. [2021-03-24 13:57:15,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 105 transitions. [2021-03-24 13:57:15,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:15,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 105 transitions. [2021-03-24 13:57:15,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,939 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,939 INFO L185 Difference]: Start difference. First operand has 90 places, 35 transitions, 393 flow. Second operand 7 states and 105 transitions. [2021-03-24 13:57:15,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 43 transitions, 515 flow [2021-03-24 13:57:15,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 43 transitions, 487 flow, removed 6 selfloop flow, removed 4 redundant places. [2021-03-24 13:57:15,945 INFO L241 Difference]: Finished difference. Result has 95 places, 35 transitions, 388 flow [2021-03-24 13:57:15,945 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=95, PETRI_TRANSITIONS=35} [2021-03-24 13:57:15,945 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 76 predicate places. [2021-03-24 13:57:15,945 INFO L480 AbstractCegarLoop]: Abstraction has has 95 places, 35 transitions, 388 flow [2021-03-24 13:57:15,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:15,946 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:15,946 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:15,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-24 13:57:15,946 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:15,946 INFO L82 PathProgramCache]: Analyzing trace with hash -310931843, now seen corresponding path program 4 times [2021-03-24 13:57:15,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:15,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116420863] [2021-03-24 13:57:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:15,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,962 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:15,963 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:15,968 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:15,974 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:15,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,980 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:15,987 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:15,987 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:15,998 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:15,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:16,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116420863] [2021-03-24 13:57:16,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:16,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:16,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692867820] [2021-03-24 13:57:16,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:16,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:16,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:16,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:16,010 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:16,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 35 transitions, 388 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:16,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:16,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:16,107 INFO L129 PetriNetUnfolder]: 19/130 cut-off events. [2021-03-24 13:57:16,107 INFO L130 PetriNetUnfolder]: For 843/845 co-relation queries the response was YES. [2021-03-24 13:57:16,108 INFO L84 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 130 events. 19/130 cut-off events. For 843/845 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 757 event pairs, 11 based on Foata normal form. 1/131 useless extension candidates. Maximal degree in co-relation 622. Up to 66 conditions per place. [2021-03-24 13:57:16,108 INFO L132 encePairwiseOnDemand]: 36/42 looper letters, 30 selfloop transitions, 4 changer transitions 4/44 dead transitions. [2021-03-24 13:57:16,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 44 transitions, 526 flow [2021-03-24 13:57:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 13:57:16,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 13:57:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2021-03-24 13:57:16,110 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2021-03-24 13:57:16,110 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 107 transitions. [2021-03-24 13:57:16,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 107 transitions. [2021-03-24 13:57:16,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:16,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 107 transitions. [2021-03-24 13:57:16,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 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) [2021-03-24 13:57:16,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,112 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,112 INFO L185 Difference]: Start difference. First operand has 95 places, 35 transitions, 388 flow. Second operand 7 states and 107 transitions. [2021-03-24 13:57:16,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 44 transitions, 526 flow [2021-03-24 13:57:16,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 44 transitions, 500 flow, removed 9 selfloop flow, removed 5 redundant places. [2021-03-24 13:57:16,117 INFO L241 Difference]: Finished difference. Result has 96 places, 34 transitions, 379 flow [2021-03-24 13:57:16,117 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=379, PETRI_PLACES=96, PETRI_TRANSITIONS=34} [2021-03-24 13:57:16,118 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 77 predicate places. [2021-03-24 13:57:16,118 INFO L480 AbstractCegarLoop]: Abstraction has has 96 places, 34 transitions, 379 flow [2021-03-24 13:57:16,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,118 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:16,118 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:16,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-03-24 13:57:16,118 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:16,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:16,119 INFO L82 PathProgramCache]: Analyzing trace with hash 988310254, now seen corresponding path program 8 times [2021-03-24 13:57:16,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:16,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255826848] [2021-03-24 13:57:16,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:16,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:16,142 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,143 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:16,147 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,147 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:16,152 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 13:57:16,159 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,160 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:16,171 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,172 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:16,180 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:16,181 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:16,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255826848] [2021-03-24 13:57:16,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:16,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:16,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881187153] [2021-03-24 13:57:16,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:16,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:16,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:16,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:16,193 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:16,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 34 transitions, 379 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,193 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:16,193 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:16,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:16,317 INFO L129 PetriNetUnfolder]: 17/118 cut-off events. [2021-03-24 13:57:16,317 INFO L130 PetriNetUnfolder]: For 782/799 co-relation queries the response was YES. [2021-03-24 13:57:16,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 637 conditions, 118 events. 17/118 cut-off events. For 782/799 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 669 event pairs, 3 based on Foata normal form. 5/122 useless extension candidates. Maximal degree in co-relation 575. Up to 39 conditions per place. [2021-03-24 13:57:16,320 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 24 selfloop transitions, 8 changer transitions 6/44 dead transitions. [2021-03-24 13:57:16,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 44 transitions, 545 flow [2021-03-24 13:57:16,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 13:57:16,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 13:57:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2021-03-24 13:57:16,324 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2021-03-24 13:57:16,324 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 114 transitions. [2021-03-24 13:57:16,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 114 transitions. [2021-03-24 13:57:16,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:16,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 114 transitions. [2021-03-24 13:57:16,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,328 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,328 INFO L185 Difference]: Start difference. First operand has 96 places, 34 transitions, 379 flow. Second operand 8 states and 114 transitions. [2021-03-24 13:57:16,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 44 transitions, 545 flow [2021-03-24 13:57:16,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 44 transitions, 511 flow, removed 8 selfloop flow, removed 10 redundant places. [2021-03-24 13:57:16,334 INFO L241 Difference]: Finished difference. Result has 93 places, 31 transitions, 326 flow [2021-03-24 13:57:16,334 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=326, PETRI_PLACES=93, PETRI_TRANSITIONS=31} [2021-03-24 13:57:16,334 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 74 predicate places. [2021-03-24 13:57:16,334 INFO L480 AbstractCegarLoop]: Abstraction has has 93 places, 31 transitions, 326 flow [2021-03-24 13:57:16,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,334 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:16,334 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:16,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-03-24 13:57:16,334 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:16,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:16,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1998957513, now seen corresponding path program 5 times [2021-03-24 13:57:16,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:16,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337584977] [2021-03-24 13:57:16,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:16,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,363 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:16,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:16,372 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,375 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:16,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 13:57:16,392 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,393 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:16,400 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,400 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:16,408 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:16,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:16,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337584977] [2021-03-24 13:57:16,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:16,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:16,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214614522] [2021-03-24 13:57:16,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:16,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:16,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:16,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:16,419 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:16,419 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 31 transitions, 326 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:16,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:16,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:16,522 INFO L129 PetriNetUnfolder]: 19/113 cut-off events. [2021-03-24 13:57:16,522 INFO L130 PetriNetUnfolder]: For 680/688 co-relation queries the response was YES. [2021-03-24 13:57:16,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 590 conditions, 113 events. 19/113 cut-off events. For 680/688 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 573 event pairs, 11 based on Foata normal form. 6/119 useless extension candidates. Maximal degree in co-relation 536. Up to 59 conditions per place. [2021-03-24 13:57:16,523 INFO L132 encePairwiseOnDemand]: 36/42 looper letters, 23 selfloop transitions, 1 changer transitions 9/39 dead transitions. [2021-03-24 13:57:16,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 39 transitions, 435 flow [2021-03-24 13:57:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 13:57:16,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 13:57:16,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2021-03-24 13:57:16,524 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2021-03-24 13:57:16,524 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 107 transitions. [2021-03-24 13:57:16,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 107 transitions. [2021-03-24 13:57:16,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:16,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 107 transitions. [2021-03-24 13:57:16,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 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) [2021-03-24 13:57:16,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,526 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,526 INFO L185 Difference]: Start difference. First operand has 93 places, 31 transitions, 326 flow. Second operand 7 states and 107 transitions. [2021-03-24 13:57:16,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 39 transitions, 435 flow [2021-03-24 13:57:16,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 39 transitions, 400 flow, removed 7 selfloop flow, removed 10 redundant places. [2021-03-24 13:57:16,529 INFO L241 Difference]: Finished difference. Result has 86 places, 27 transitions, 265 flow [2021-03-24 13:57:16,530 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=265, PETRI_PLACES=86, PETRI_TRANSITIONS=27} [2021-03-24 13:57:16,530 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 67 predicate places. [2021-03-24 13:57:16,530 INFO L480 AbstractCegarLoop]: Abstraction has has 86 places, 27 transitions, 265 flow [2021-03-24 13:57:16,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,530 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:16,530 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:16,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-03-24 13:57:16,530 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:16,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:16,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2074554882, now seen corresponding path program 9 times [2021-03-24 13:57:16,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:16,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557981604] [2021-03-24 13:57:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:16,539 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,540 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:16,544 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,546 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:16,550 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,550 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:16,556 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,556 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:16,562 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,563 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:16,572 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:16,579 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:16,580 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:16,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557981604] [2021-03-24 13:57:16,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:16,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:16,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594815751] [2021-03-24 13:57:16,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:16,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:16,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:16,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:16,590 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:16,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 27 transitions, 265 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:16,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:16,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:16,718 INFO L129 PetriNetUnfolder]: 15/93 cut-off events. [2021-03-24 13:57:16,718 INFO L130 PetriNetUnfolder]: For 496/503 co-relation queries the response was YES. [2021-03-24 13:57:16,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 475 conditions, 93 events. 15/93 cut-off events. For 496/503 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 468 event pairs, 1 based on Foata normal form. 4/96 useless extension candidates. Maximal degree in co-relation 427. Up to 49 conditions per place. [2021-03-24 13:57:16,719 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 21 selfloop transitions, 7 changer transitions 6/39 dead transitions. [2021-03-24 13:57:16,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 39 transitions, 448 flow [2021-03-24 13:57:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 13:57:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 13:57:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2021-03-24 13:57:16,720 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3273809523809524 [2021-03-24 13:57:16,720 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 110 transitions. [2021-03-24 13:57:16,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 110 transitions. [2021-03-24 13:57:16,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:16,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 110 transitions. [2021-03-24 13:57:16,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,721 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,721 INFO L185 Difference]: Start difference. First operand has 86 places, 27 transitions, 265 flow. Second operand 8 states and 110 transitions. [2021-03-24 13:57:16,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 39 transitions, 448 flow [2021-03-24 13:57:16,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 39 transitions, 420 flow, removed 10 selfloop flow, removed 8 redundant places. [2021-03-24 13:57:16,724 INFO L241 Difference]: Finished difference. Result has 82 places, 27 transitions, 275 flow [2021-03-24 13:57:16,724 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=275, PETRI_PLACES=82, PETRI_TRANSITIONS=27} [2021-03-24 13:57:16,724 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 63 predicate places. [2021-03-24 13:57:16,724 INFO L480 AbstractCegarLoop]: Abstraction has has 82 places, 27 transitions, 275 flow [2021-03-24 13:57:16,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,724 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:16,725 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:16,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-03-24 13:57:16,725 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:16,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:16,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1588313336, now seen corresponding path program 10 times [2021-03-24 13:57:16,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:16,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042025531] [2021-03-24 13:57:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:16,741 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,742 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:16,743 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:16,747 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,747 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:16,752 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,753 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:16,757 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,759 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:16,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,766 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:16,773 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:16,774 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:16,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042025531] [2021-03-24 13:57:16,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:16,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:16,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818385172] [2021-03-24 13:57:16,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:16,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:16,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:16,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:16,784 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:16,784 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 27 transitions, 275 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:16,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:16,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:16,894 INFO L129 PetriNetUnfolder]: 15/86 cut-off events. [2021-03-24 13:57:16,894 INFO L130 PetriNetUnfolder]: For 441/442 co-relation queries the response was YES. [2021-03-24 13:57:16,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 86 events. 15/86 cut-off events. For 441/442 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 403 event pairs, 1 based on Foata normal form. 2/88 useless extension candidates. Maximal degree in co-relation 403. Up to 25 conditions per place. [2021-03-24 13:57:16,895 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 21 selfloop transitions, 8 changer transitions 6/40 dead transitions. [2021-03-24 13:57:16,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 40 transitions, 439 flow [2021-03-24 13:57:16,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2021-03-24 13:57:16,896 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3306878306878307 [2021-03-24 13:57:16,896 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 125 transitions. [2021-03-24 13:57:16,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 125 transitions. [2021-03-24 13:57:16,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:16,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 125 transitions. [2021-03-24 13:57:16,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,897 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,897 INFO L185 Difference]: Start difference. First operand has 82 places, 27 transitions, 275 flow. Second operand 9 states and 125 transitions. [2021-03-24 13:57:16,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 40 transitions, 439 flow [2021-03-24 13:57:16,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 40 transitions, 396 flow, removed 11 selfloop flow, removed 9 redundant places. [2021-03-24 13:57:16,899 INFO L241 Difference]: Finished difference. Result has 79 places, 24 transitions, 216 flow [2021-03-24 13:57:16,899 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=216, PETRI_PLACES=79, PETRI_TRANSITIONS=24} [2021-03-24 13:57:16,899 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 60 predicate places. [2021-03-24 13:57:16,899 INFO L480 AbstractCegarLoop]: Abstraction has has 79 places, 24 transitions, 216 flow [2021-03-24 13:57:16,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,899 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:16,899 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:16,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-03-24 13:57:16,900 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:16,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1716478920, now seen corresponding path program 11 times [2021-03-24 13:57:16,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:16,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660832789] [2021-03-24 13:57:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:16,907 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:16,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:16,912 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:16,918 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,918 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 13:57:16,925 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:16,932 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:16,932 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-24 13:57:16,940 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:16,941 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:16,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660832789] [2021-03-24 13:57:16,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:16,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:16,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944916423] [2021-03-24 13:57:16,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:16,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:16,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:16,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:16,956 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:16,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 24 transitions, 216 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:16,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:16,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:16,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:17,065 INFO L129 PetriNetUnfolder]: 14/81 cut-off events. [2021-03-24 13:57:17,065 INFO L130 PetriNetUnfolder]: For 285/286 co-relation queries the response was YES. [2021-03-24 13:57:17,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 81 events. 14/81 cut-off events. For 285/286 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 370 event pairs, 1 based on Foata normal form. 2/83 useless extension candidates. Maximal degree in co-relation 355. Up to 49 conditions per place. [2021-03-24 13:57:17,066 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 17 selfloop transitions, 7 changer transitions 3/32 dead transitions. [2021-03-24 13:57:17,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 32 transitions, 341 flow [2021-03-24 13:57:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 13:57:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 13:57:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2021-03-24 13:57:17,067 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.32142857142857145 [2021-03-24 13:57:17,068 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 108 transitions. [2021-03-24 13:57:17,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 108 transitions. [2021-03-24 13:57:17,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:17,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 108 transitions. [2021-03-24 13:57:17,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,069 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,070 INFO L185 Difference]: Start difference. First operand has 79 places, 24 transitions, 216 flow. Second operand 8 states and 108 transitions. [2021-03-24 13:57:17,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 32 transitions, 341 flow [2021-03-24 13:57:17,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 32 transitions, 309 flow, removed 8 selfloop flow, removed 7 redundant places. [2021-03-24 13:57:17,072 INFO L241 Difference]: Finished difference. Result has 74 places, 26 transitions, 237 flow [2021-03-24 13:57:17,072 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=74, PETRI_TRANSITIONS=26} [2021-03-24 13:57:17,072 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 55 predicate places. [2021-03-24 13:57:17,072 INFO L480 AbstractCegarLoop]: Abstraction has has 74 places, 26 transitions, 237 flow [2021-03-24 13:57:17,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,072 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:17,072 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:17,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-03-24 13:57:17,073 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:17,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:17,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2058341156, now seen corresponding path program 12 times [2021-03-24 13:57:17,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:17,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689580082] [2021-03-24 13:57:17,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:17,092 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:17,093 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,093 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:17,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:17,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 13:57:17,111 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,111 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:17,118 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,118 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:17,126 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:17,127 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:17,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689580082] [2021-03-24 13:57:17,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:17,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:17,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773331062] [2021-03-24 13:57:17,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:17,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:17,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:17,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:17,138 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:17,138 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 26 transitions, 237 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:17,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:17,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:17,236 INFO L129 PetriNetUnfolder]: 14/77 cut-off events. [2021-03-24 13:57:17,237 INFO L130 PetriNetUnfolder]: For 272/273 co-relation queries the response was YES. [2021-03-24 13:57:17,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 77 events. 14/77 cut-off events. For 272/273 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 323 event pairs, 10 based on Foata normal form. 2/79 useless extension candidates. Maximal degree in co-relation 348. Up to 49 conditions per place. [2021-03-24 13:57:17,237 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 15 selfloop transitions, 3 changer transitions 8/31 dead transitions. [2021-03-24 13:57:17,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 31 transitions, 332 flow [2021-03-24 13:57:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 13:57:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 13:57:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2021-03-24 13:57:17,238 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.31845238095238093 [2021-03-24 13:57:17,238 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 107 transitions. [2021-03-24 13:57:17,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 107 transitions. [2021-03-24 13:57:17,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:17,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 107 transitions. [2021-03-24 13:57:17,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 13.375) internal successors, (107), 8 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) [2021-03-24 13:57:17,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,246 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,246 INFO L185 Difference]: Start difference. First operand has 74 places, 26 transitions, 237 flow. Second operand 8 states and 107 transitions. [2021-03-24 13:57:17,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 31 transitions, 332 flow [2021-03-24 13:57:17,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 31 transitions, 315 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-03-24 13:57:17,248 INFO L241 Difference]: Finished difference. Result has 77 places, 21 transitions, 165 flow [2021-03-24 13:57:17,248 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=165, PETRI_PLACES=77, PETRI_TRANSITIONS=21} [2021-03-24 13:57:17,249 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 58 predicate places. [2021-03-24 13:57:17,249 INFO L480 AbstractCegarLoop]: Abstraction has has 77 places, 21 transitions, 165 flow [2021-03-24 13:57:17,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,249 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:17,249 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:17,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-03-24 13:57:17,249 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:17,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:17,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1770493570, now seen corresponding path program 13 times [2021-03-24 13:57:17,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:17,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340424417] [2021-03-24 13:57:17,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:17,267 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,267 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:17,267 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,268 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:17,272 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,273 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:17,278 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:17,284 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,284 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:17,294 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,294 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:17,301 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:17,302 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:17,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340424417] [2021-03-24 13:57:17,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:17,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:17,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419663580] [2021-03-24 13:57:17,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:17,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:17,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:17,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:17,313 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:17,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 21 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:17,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:17,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:17,416 INFO L129 PetriNetUnfolder]: 13/71 cut-off events. [2021-03-24 13:57:17,416 INFO L130 PetriNetUnfolder]: For 226/231 co-relation queries the response was YES. [2021-03-24 13:57:17,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 71 events. 13/71 cut-off events. For 226/231 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 287 event pairs, 13 based on Foata normal form. 1/70 useless extension candidates. Maximal degree in co-relation 314. Up to 39 conditions per place. [2021-03-24 13:57:17,417 INFO L132 encePairwiseOnDemand]: 35/42 looper letters, 16 selfloop transitions, 4 changer transitions 4/29 dead transitions. [2021-03-24 13:57:17,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 29 transitions, 285 flow [2021-03-24 13:57:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 13:57:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 13:57:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2021-03-24 13:57:17,417 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3273809523809524 [2021-03-24 13:57:17,417 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 110 transitions. [2021-03-24 13:57:17,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 110 transitions. [2021-03-24 13:57:17,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:17,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 110 transitions. [2021-03-24 13:57:17,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,419 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,419 INFO L185 Difference]: Start difference. First operand has 77 places, 21 transitions, 165 flow. Second operand 8 states and 110 transitions. [2021-03-24 13:57:17,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 29 transitions, 285 flow [2021-03-24 13:57:17,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 29 transitions, 251 flow, removed 12 selfloop flow, removed 9 redundant places. [2021-03-24 13:57:17,420 INFO L241 Difference]: Finished difference. Result has 67 places, 21 transitions, 162 flow [2021-03-24 13:57:17,420 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=162, PETRI_PLACES=67, PETRI_TRANSITIONS=21} [2021-03-24 13:57:17,420 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 48 predicate places. [2021-03-24 13:57:17,421 INFO L480 AbstractCegarLoop]: Abstraction has has 67 places, 21 transitions, 162 flow [2021-03-24 13:57:17,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,421 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:17,421 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:17,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-03-24 13:57:17,421 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:17,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:17,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1774656092, now seen corresponding path program 14 times [2021-03-24 13:57:17,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:17,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856195840] [2021-03-24 13:57:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:17,439 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,440 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:17,440 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,440 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:17,445 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,445 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:17,451 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,451 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 13:57:17,458 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,459 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:17,466 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,466 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:17,474 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:17,474 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:17,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856195840] [2021-03-24 13:57:17,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:17,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:17,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095794419] [2021-03-24 13:57:17,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:17,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:17,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:17,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:17,483 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:17,484 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 21 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,484 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:17,484 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:17,484 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:17,582 INFO L129 PetriNetUnfolder]: 13/64 cut-off events. [2021-03-24 13:57:17,582 INFO L130 PetriNetUnfolder]: For 162/167 co-relation queries the response was YES. [2021-03-24 13:57:17,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 64 events. 13/64 cut-off events. For 162/167 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 239 event pairs, 13 based on Foata normal form. 1/63 useless extension candidates. Maximal degree in co-relation 281. Up to 39 conditions per place. [2021-03-24 13:57:17,583 INFO L132 encePairwiseOnDemand]: 35/42 looper letters, 13 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2021-03-24 13:57:17,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 26 transitions, 249 flow [2021-03-24 13:57:17,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 13:57:17,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 13:57:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2021-03-24 13:57:17,584 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.31845238095238093 [2021-03-24 13:57:17,584 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 107 transitions. [2021-03-24 13:57:17,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 107 transitions. [2021-03-24 13:57:17,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:17,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 107 transitions. [2021-03-24 13:57:17,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 13.375) internal successors, (107), 8 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) [2021-03-24 13:57:17,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,585 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,585 INFO L185 Difference]: Start difference. First operand has 67 places, 21 transitions, 162 flow. Second operand 8 states and 107 transitions. [2021-03-24 13:57:17,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 26 transitions, 249 flow [2021-03-24 13:57:17,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 26 transitions, 221 flow, removed 9 selfloop flow, removed 7 redundant places. [2021-03-24 13:57:17,588 INFO L241 Difference]: Finished difference. Result has 67 places, 20 transitions, 149 flow [2021-03-24 13:57:17,588 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=149, PETRI_PLACES=67, PETRI_TRANSITIONS=20} [2021-03-24 13:57:17,588 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 48 predicate places. [2021-03-24 13:57:17,588 INFO L480 AbstractCegarLoop]: Abstraction has has 67 places, 20 transitions, 149 flow [2021-03-24 13:57:17,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,588 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:17,588 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:17,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-03-24 13:57:17,589 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:17,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1598591282, now seen corresponding path program 15 times [2021-03-24 13:57:17,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:17,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542451147] [2021-03-24 13:57:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:17,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:17,616 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:17,621 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:17,627 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,627 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 13:57:17,634 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,635 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:17,641 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,642 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-24 13:57:17,651 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:17,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:17,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542451147] [2021-03-24 13:57:17,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:17,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:17,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301849278] [2021-03-24 13:57:17,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:17,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:17,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:17,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:17,659 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:17,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 20 transitions, 149 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:17,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:17,659 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:17,753 INFO L129 PetriNetUnfolder]: 13/58 cut-off events. [2021-03-24 13:57:17,754 INFO L130 PetriNetUnfolder]: For 111/112 co-relation queries the response was YES. [2021-03-24 13:57:17,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 58 events. 13/58 cut-off events. For 111/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 194 event pairs, 13 based on Foata normal form. 1/58 useless extension candidates. Maximal degree in co-relation 248. Up to 39 conditions per place. [2021-03-24 13:57:17,754 INFO L132 encePairwiseOnDemand]: 35/42 looper letters, 10 selfloop transitions, 0 changer transitions 7/22 dead transitions. [2021-03-24 13:57:17,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 22 transitions, 206 flow [2021-03-24 13:57:17,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 13:57:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 13:57:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2021-03-24 13:57:17,755 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.30952380952380953 [2021-03-24 13:57:17,755 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 104 transitions. [2021-03-24 13:57:17,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 104 transitions. [2021-03-24 13:57:17,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:17,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 104 transitions. [2021-03-24 13:57:17,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 13.0) internal successors, (104), 8 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) [2021-03-24 13:57:17,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,756 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,756 INFO L185 Difference]: Start difference. First operand has 67 places, 20 transitions, 149 flow. Second operand 8 states and 104 transitions. [2021-03-24 13:57:17,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 22 transitions, 206 flow [2021-03-24 13:57:17,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 22 transitions, 178 flow, removed 5 selfloop flow, removed 10 redundant places. [2021-03-24 13:57:17,758 INFO L241 Difference]: Finished difference. Result has 64 places, 15 transitions, 84 flow [2021-03-24 13:57:17,758 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=84, PETRI_PLACES=64, PETRI_TRANSITIONS=15} [2021-03-24 13:57:17,758 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 45 predicate places. [2021-03-24 13:57:17,758 INFO L480 AbstractCegarLoop]: Abstraction has has 64 places, 15 transitions, 84 flow [2021-03-24 13:57:17,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,758 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:17,758 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:17,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-03-24 13:57:17,758 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:17,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:17,758 INFO L82 PathProgramCache]: Analyzing trace with hash 930272313, now seen corresponding path program 6 times [2021-03-24 13:57:17,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:17,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089216715] [2021-03-24 13:57:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:17,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,766 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:17,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:17,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,771 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:17,776 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,776 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 13:57:17,784 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-24 13:57:17,792 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,793 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:17,801 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:17,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:17,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089216715] [2021-03-24 13:57:17,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:17,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:17,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138469665] [2021-03-24 13:57:17,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:17,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:17,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:17,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:17,810 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:17,811 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 15 transitions, 84 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,811 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:17,811 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:17,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:17,889 INFO L129 PetriNetUnfolder]: 13/66 cut-off events. [2021-03-24 13:57:17,889 INFO L130 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2021-03-24 13:57:17,889 INFO L84 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 66 events. 13/66 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 255 event pairs, 1 based on Foata normal form. 1/67 useless extension candidates. Maximal degree in co-relation 246. Up to 25 conditions per place. [2021-03-24 13:57:17,890 INFO L132 encePairwiseOnDemand]: 36/42 looper letters, 19 selfloop transitions, 4 changer transitions 3/31 dead transitions. [2021-03-24 13:57:17,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 31 transitions, 245 flow [2021-03-24 13:57:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 13:57:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 13:57:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2021-03-24 13:57:17,891 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2021-03-24 13:57:17,891 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 107 transitions. [2021-03-24 13:57:17,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 107 transitions. [2021-03-24 13:57:17,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:17,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 107 transitions. [2021-03-24 13:57:17,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 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) [2021-03-24 13:57:17,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,893 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,893 INFO L185 Difference]: Start difference. First operand has 64 places, 15 transitions, 84 flow. Second operand 7 states and 107 transitions. [2021-03-24 13:57:17,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 31 transitions, 245 flow [2021-03-24 13:57:17,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 31 transitions, 202 flow, removed 20 selfloop flow, removed 9 redundant places. [2021-03-24 13:57:17,894 INFO L241 Difference]: Finished difference. Result has 48 places, 17 transitions, 101 flow [2021-03-24 13:57:17,894 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=101, PETRI_PLACES=48, PETRI_TRANSITIONS=17} [2021-03-24 13:57:17,894 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 29 predicate places. [2021-03-24 13:57:17,894 INFO L480 AbstractCegarLoop]: Abstraction has has 48 places, 17 transitions, 101 flow [2021-03-24 13:57:17,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,894 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:17,894 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:17,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-03-24 13:57:17,895 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:17,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:17,895 INFO L82 PathProgramCache]: Analyzing trace with hash -185816835, now seen corresponding path program 7 times [2021-03-24 13:57:17,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:17,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992726931] [2021-03-24 13:57:17,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:17,902 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:17,903 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,904 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:17,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:17,913 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,914 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:17,919 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,920 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:17,927 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:17,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:17,935 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:17,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:17,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992726931] [2021-03-24 13:57:17,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:17,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:17,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238027750] [2021-03-24 13:57:17,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:17,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:17,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:17,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:17,944 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:17,944 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 17 transitions, 101 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:17,944 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:17,945 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:17,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:18,023 INFO L129 PetriNetUnfolder]: 12/64 cut-off events. [2021-03-24 13:57:18,023 INFO L130 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2021-03-24 13:57:18,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 64 events. 12/64 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 240 event pairs, 1 based on Foata normal form. 1/65 useless extension candidates. Maximal degree in co-relation 242. Up to 22 conditions per place. [2021-03-24 13:57:18,024 INFO L132 encePairwiseOnDemand]: 36/42 looper letters, 16 selfloop transitions, 5 changer transitions 2/28 dead transitions. [2021-03-24 13:57:18,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 28 transitions, 209 flow [2021-03-24 13:57:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 13:57:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 13:57:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2021-03-24 13:57:18,024 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2021-03-24 13:57:18,025 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 107 transitions. [2021-03-24 13:57:18,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 107 transitions. [2021-03-24 13:57:18,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:18,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 107 transitions. [2021-03-24 13:57:18,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 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) [2021-03-24 13:57:18,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,025 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,026 INFO L185 Difference]: Start difference. First operand has 48 places, 17 transitions, 101 flow. Second operand 7 states and 107 transitions. [2021-03-24 13:57:18,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 28 transitions, 209 flow [2021-03-24 13:57:18,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 28 transitions, 199 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-03-24 13:57:18,027 INFO L241 Difference]: Finished difference. Result has 54 places, 19 transitions, 130 flow [2021-03-24 13:57:18,027 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=130, PETRI_PLACES=54, PETRI_TRANSITIONS=19} [2021-03-24 13:57:18,027 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 35 predicate places. [2021-03-24 13:57:18,027 INFO L480 AbstractCegarLoop]: Abstraction has has 54 places, 19 transitions, 130 flow [2021-03-24 13:57:18,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,027 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:18,027 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:18,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-03-24 13:57:18,027 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:18,028 INFO L82 PathProgramCache]: Analyzing trace with hash -195647865, now seen corresponding path program 8 times [2021-03-24 13:57:18,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:18,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527765331] [2021-03-24 13:57:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:18,035 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,035 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:18,035 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,050 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:18,061 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,061 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-24 13:57:18,067 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,067 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:18,072 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,073 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,079 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,080 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:18,089 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:18,090 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:18,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527765331] [2021-03-24 13:57:18,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:18,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:18,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619236410] [2021-03-24 13:57:18,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:18,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:18,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:18,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:18,099 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:18,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 19 transitions, 130 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:18,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:18,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:18,175 INFO L129 PetriNetUnfolder]: 12/60 cut-off events. [2021-03-24 13:57:18,175 INFO L130 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2021-03-24 13:57:18,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 60 events. 12/60 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 217 event pairs, 1 based on Foata normal form. 1/61 useless extension candidates. Maximal degree in co-relation 255. Up to 22 conditions per place. [2021-03-24 13:57:18,176 INFO L132 encePairwiseOnDemand]: 36/42 looper letters, 13 selfloop transitions, 2 changer transitions 6/26 dead transitions. [2021-03-24 13:57:18,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 26 transitions, 215 flow [2021-03-24 13:57:18,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 13:57:18,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 13:57:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2021-03-24 13:57:18,177 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2021-03-24 13:57:18,177 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 105 transitions. [2021-03-24 13:57:18,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 105 transitions. [2021-03-24 13:57:18,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:18,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 105 transitions. [2021-03-24 13:57:18,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,178 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,178 INFO L185 Difference]: Start difference. First operand has 54 places, 19 transitions, 130 flow. Second operand 7 states and 105 transitions. [2021-03-24 13:57:18,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 26 transitions, 215 flow [2021-03-24 13:57:18,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 26 transitions, 203 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-03-24 13:57:18,179 INFO L241 Difference]: Finished difference. Result has 58 places, 16 transitions, 98 flow [2021-03-24 13:57:18,179 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=98, PETRI_PLACES=58, PETRI_TRANSITIONS=16} [2021-03-24 13:57:18,181 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 39 predicate places. [2021-03-24 13:57:18,181 INFO L480 AbstractCegarLoop]: Abstraction has has 58 places, 16 transitions, 98 flow [2021-03-24 13:57:18,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,181 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:18,181 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:18,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-03-24 13:57:18,181 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:18,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:18,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1646945923, now seen corresponding path program 9 times [2021-03-24 13:57:18,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:18,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359362094] [2021-03-24 13:57:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:18,190 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,191 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:18,191 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,191 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:18,195 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,201 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,201 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:18,206 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,206 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-24 13:57:18,214 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,214 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:18,221 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:18,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:18,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359362094] [2021-03-24 13:57:18,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:18,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:18,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474581528] [2021-03-24 13:57:18,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:18,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:18,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:18,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:18,230 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:18,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 16 transitions, 98 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:18,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:18,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:18,294 INFO L129 PetriNetUnfolder]: 10/45 cut-off events. [2021-03-24 13:57:18,295 INFO L130 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2021-03-24 13:57:18,295 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 45 events. 10/45 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 118 event pairs, 0 based on Foata normal form. 1/46 useless extension candidates. Maximal degree in co-relation 188. Up to 13 conditions per place. [2021-03-24 13:57:18,295 INFO L132 encePairwiseOnDemand]: 36/42 looper letters, 16 selfloop transitions, 4 changer transitions 4/29 dead transitions. [2021-03-24 13:57:18,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 29 transitions, 233 flow [2021-03-24 13:57:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 13:57:18,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 13:57:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2021-03-24 13:57:18,296 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2021-03-24 13:57:18,296 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 105 transitions. [2021-03-24 13:57:18,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 105 transitions. [2021-03-24 13:57:18,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:18,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 105 transitions. [2021-03-24 13:57:18,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,297 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,297 INFO L185 Difference]: Start difference. First operand has 58 places, 16 transitions, 98 flow. Second operand 7 states and 105 transitions. [2021-03-24 13:57:18,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 29 transitions, 233 flow [2021-03-24 13:57:18,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 29 transitions, 203 flow, removed 8 selfloop flow, removed 10 redundant places. [2021-03-24 13:57:18,298 INFO L241 Difference]: Finished difference. Result has 52 places, 16 transitions, 93 flow [2021-03-24 13:57:18,298 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=93, PETRI_PLACES=52, PETRI_TRANSITIONS=16} [2021-03-24 13:57:18,299 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 33 predicate places. [2021-03-24 13:57:18,299 INFO L480 AbstractCegarLoop]: Abstraction has has 52 places, 16 transitions, 93 flow [2021-03-24 13:57:18,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,299 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:18,299 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:18,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-03-24 13:57:18,299 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:18,300 INFO L82 PathProgramCache]: Analyzing trace with hash 753775053, now seen corresponding path program 10 times [2021-03-24 13:57:18,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:18,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033244879] [2021-03-24 13:57:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:18,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:18,311 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:18,315 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,315 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,320 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 13:57:18,327 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,334 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:18,343 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:18,343 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:18,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033244879] [2021-03-24 13:57:18,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:18,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 13:57:18,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624577803] [2021-03-24 13:57:18,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-24 13:57:18,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:18,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-24 13:57:18,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-24 13:57:18,351 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2021-03-24 13:57:18,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 16 transitions, 93 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:18,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2021-03-24 13:57:18,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:18,415 INFO L129 PetriNetUnfolder]: 10/39 cut-off events. [2021-03-24 13:57:18,416 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2021-03-24 13:57:18,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 39 events. 10/39 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 94 event pairs, 1 based on Foata normal form. 1/40 useless extension candidates. Maximal degree in co-relation 150. Up to 15 conditions per place. [2021-03-24 13:57:18,416 INFO L132 encePairwiseOnDemand]: 36/42 looper letters, 11 selfloop transitions, 2 changer transitions 5/23 dead transitions. [2021-03-24 13:57:18,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 23 transitions, 168 flow [2021-03-24 13:57:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 13:57:18,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 13:57:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2021-03-24 13:57:18,418 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.35034013605442177 [2021-03-24 13:57:18,418 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 103 transitions. [2021-03-24 13:57:18,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 103 transitions. [2021-03-24 13:57:18,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:18,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 103 transitions. [2021-03-24 13:57:18,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,420 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,420 INFO L185 Difference]: Start difference. First operand has 52 places, 16 transitions, 93 flow. Second operand 7 states and 103 transitions. [2021-03-24 13:57:18,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 23 transitions, 168 flow [2021-03-24 13:57:18,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 23 transitions, 157 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-03-24 13:57:18,421 INFO L241 Difference]: Finished difference. Result has 52 places, 12 transitions, 50 flow [2021-03-24 13:57:18,421 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=7, PETRI_FLOW=50, PETRI_PLACES=52, PETRI_TRANSITIONS=12} [2021-03-24 13:57:18,421 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 33 predicate places. [2021-03-24 13:57:18,421 INFO L480 AbstractCegarLoop]: Abstraction has has 52 places, 12 transitions, 50 flow [2021-03-24 13:57:18,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,421 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:18,421 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:18,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-03-24 13:57:18,422 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:18,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:18,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1272325434, now seen corresponding path program 1 times [2021-03-24 13:57:18,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:18,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460154653] [2021-03-24 13:57:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:18,439 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,439 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:18,439 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,440 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:18,443 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,444 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,449 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,449 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:18,454 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,454 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:18,460 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,460 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:18,467 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,469 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:18,478 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:18,478 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:18,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460154653] [2021-03-24 13:57:18,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:18,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:18,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165983587] [2021-03-24 13:57:18,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:18,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:18,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:18,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:18,488 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:18,488 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 12 transitions, 50 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:18,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:18,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:18,488 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:18,591 INFO L129 PetriNetUnfolder]: 11/42 cut-off events. [2021-03-24 13:57:18,591 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2021-03-24 13:57:18,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 42 events. 11/42 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 0 based on Foata normal form. 1/43 useless extension candidates. Maximal degree in co-relation 140. Up to 7 conditions per place. [2021-03-24 13:57:18,591 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 15 selfloop transitions, 4 changer transitions 3/26 dead transitions. [2021-03-24 13:57:18,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 26 transitions, 165 flow [2021-03-24 13:57:18,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2021-03-24 13:57:18,593 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.32275132275132273 [2021-03-24 13:57:18,593 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 122 transitions. [2021-03-24 13:57:18,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 122 transitions. [2021-03-24 13:57:18,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:18,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 122 transitions. [2021-03-24 13:57:18,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,595 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,595 INFO L185 Difference]: Start difference. First operand has 52 places, 12 transitions, 50 flow. Second operand 9 states and 122 transitions. [2021-03-24 13:57:18,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 26 transitions, 165 flow [2021-03-24 13:57:18,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 26 transitions, 123 flow, removed 7 selfloop flow, removed 8 redundant places. [2021-03-24 13:57:18,596 INFO L241 Difference]: Finished difference. Result has 38 places, 12 transitions, 53 flow [2021-03-24 13:57:18,596 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=53, PETRI_PLACES=38, PETRI_TRANSITIONS=12} [2021-03-24 13:57:18,596 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 19 predicate places. [2021-03-24 13:57:18,596 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 12 transitions, 53 flow [2021-03-24 13:57:18,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:18,596 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:18,596 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:18,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-03-24 13:57:18,597 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:18,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1339083334, now seen corresponding path program 2 times [2021-03-24 13:57:18,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:18,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115772590] [2021-03-24 13:57:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:18,613 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,613 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:18,613 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,614 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:18,617 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,618 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,623 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:18,628 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,628 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:18,637 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,637 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:18,645 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,646 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:18,653 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:18,654 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:18,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115772590] [2021-03-24 13:57:18,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:18,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:18,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045829919] [2021-03-24 13:57:18,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:18,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:18,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:18,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:18,665 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:18,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 12 transitions, 53 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:18,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:18,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:18,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:18,761 INFO L129 PetriNetUnfolder]: 10/41 cut-off events. [2021-03-24 13:57:18,761 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2021-03-24 13:57:18,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 41 events. 10/41 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 93 event pairs, 0 based on Foata normal form. 1/41 useless extension candidates. Maximal degree in co-relation 149. Up to 9 conditions per place. [2021-03-24 13:57:18,762 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 15 selfloop transitions, 3 changer transitions 5/27 dead transitions. [2021-03-24 13:57:18,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 27 transitions, 181 flow [2021-03-24 13:57:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2021-03-24 13:57:18,762 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3253968253968254 [2021-03-24 13:57:18,763 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 123 transitions. [2021-03-24 13:57:18,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 123 transitions. [2021-03-24 13:57:18,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:18,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 123 transitions. [2021-03-24 13:57:18,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,764 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,764 INFO L185 Difference]: Start difference. First operand has 38 places, 12 transitions, 53 flow. Second operand 9 states and 123 transitions. [2021-03-24 13:57:18,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 27 transitions, 181 flow [2021-03-24 13:57:18,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 142 flow, removed 3 selfloop flow, removed 7 redundant places. [2021-03-24 13:57:18,764 INFO L241 Difference]: Finished difference. Result has 41 places, 12 transitions, 57 flow [2021-03-24 13:57:18,765 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=57, PETRI_PLACES=41, PETRI_TRANSITIONS=12} [2021-03-24 13:57:18,765 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 22 predicate places. [2021-03-24 13:57:18,765 INFO L480 AbstractCegarLoop]: Abstraction has has 41 places, 12 transitions, 57 flow [2021-03-24 13:57:18,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:18,766 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:18,766 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:18,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-03-24 13:57:18,766 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:18,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:18,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2011354514, now seen corresponding path program 3 times [2021-03-24 13:57:18,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:18,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298454496] [2021-03-24 13:57:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:18,772 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:18,773 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,773 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:18,777 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,777 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:18,788 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,788 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:18,794 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,794 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:18,801 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:18,810 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:18,811 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:18,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298454496] [2021-03-24 13:57:18,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:18,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:18,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045615329] [2021-03-24 13:57:18,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:18,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:18,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:18,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:18,819 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:18,820 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 12 transitions, 57 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:18,820 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:18,820 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:18,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:18,918 INFO L129 PetriNetUnfolder]: 10/51 cut-off events. [2021-03-24 13:57:18,918 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2021-03-24 13:57:18,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 51 events. 10/51 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 153 event pairs, 0 based on Foata normal form. 1/52 useless extension candidates. Maximal degree in co-relation 185. Up to 13 conditions per place. [2021-03-24 13:57:18,919 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 16 selfloop transitions, 5 changer transitions 3/28 dead transitions. [2021-03-24 13:57:18,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 28 transitions, 200 flow [2021-03-24 13:57:18,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2021-03-24 13:57:18,924 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.328042328042328 [2021-03-24 13:57:18,924 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 124 transitions. [2021-03-24 13:57:18,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 124 transitions. [2021-03-24 13:57:18,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:18,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 124 transitions. [2021-03-24 13:57:18,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,931 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:18,931 INFO L185 Difference]: Start difference. First operand has 41 places, 12 transitions, 57 flow. Second operand 9 states and 124 transitions. [2021-03-24 13:57:18,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 28 transitions, 200 flow [2021-03-24 13:57:18,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 28 transitions, 161 flow, removed 6 selfloop flow, removed 7 redundant places. [2021-03-24 13:57:18,932 INFO L241 Difference]: Finished difference. Result has 43 places, 14 transitions, 78 flow [2021-03-24 13:57:18,932 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=78, PETRI_PLACES=43, PETRI_TRANSITIONS=14} [2021-03-24 13:57:18,932 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 24 predicate places. [2021-03-24 13:57:18,932 INFO L480 AbstractCegarLoop]: Abstraction has has 43 places, 14 transitions, 78 flow [2021-03-24 13:57:18,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:18,932 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:18,932 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:18,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-03-24 13:57:18,933 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:18,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1374308836, now seen corresponding path program 4 times [2021-03-24 13:57:18,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:18,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568418991] [2021-03-24 13:57:18,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:18,946 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:18,946 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,947 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:18,950 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,951 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,956 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,956 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,962 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:18,969 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,970 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:18,978 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:18,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:18,986 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:18,986 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:18,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568418991] [2021-03-24 13:57:18,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:18,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:18,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450034346] [2021-03-24 13:57:18,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:18,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:18,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:18,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:18,995 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:18,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 14 transitions, 78 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:18,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:18,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:18,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:19,106 INFO L129 PetriNetUnfolder]: 11/63 cut-off events. [2021-03-24 13:57:19,106 INFO L130 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2021-03-24 13:57:19,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 63 events. 11/63 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 227 event pairs, 1 based on Foata normal form. 1/63 useless extension candidates. Maximal degree in co-relation 250. Up to 23 conditions per place. [2021-03-24 13:57:19,106 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 19 selfloop transitions, 5 changer transitions 5/33 dead transitions. [2021-03-24 13:57:19,107 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 33 transitions, 258 flow [2021-03-24 13:57:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2021-03-24 13:57:19,107 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2021-03-24 13:57:19,107 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 126 transitions. [2021-03-24 13:57:19,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 126 transitions. [2021-03-24 13:57:19,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:19,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 126 transitions. [2021-03-24 13:57:19,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:19,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:19,109 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:19,109 INFO L185 Difference]: Start difference. First operand has 43 places, 14 transitions, 78 flow. Second operand 9 states and 126 transitions. [2021-03-24 13:57:19,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 33 transitions, 258 flow [2021-03-24 13:57:19,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 33 transitions, 228 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-03-24 13:57:19,110 INFO L241 Difference]: Finished difference. Result has 50 places, 16 transitions, 107 flow [2021-03-24 13:57:19,110 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=107, PETRI_PLACES=50, PETRI_TRANSITIONS=16} [2021-03-24 13:57:19,110 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 31 predicate places. [2021-03-24 13:57:19,110 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 16 transitions, 107 flow [2021-03-24 13:57:19,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:19,110 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:19,110 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:19,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-03-24 13:57:19,110 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:19,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:19,111 INFO L82 PathProgramCache]: Analyzing trace with hash 383875890, now seen corresponding path program 5 times [2021-03-24 13:57:19,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:19,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534858196] [2021-03-24 13:57:19,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:19,123 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,124 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:19,124 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,124 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:19,135 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:19,140 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:19,147 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,148 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:19,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,154 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:19,161 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:19,171 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:19,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:19,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534858196] [2021-03-24 13:57:19,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:19,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:19,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105274314] [2021-03-24 13:57:19,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:19,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:19,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:19,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:19,181 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:19,181 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 16 transitions, 107 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:19,181 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:19,181 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:19,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:19,289 INFO L129 PetriNetUnfolder]: 13/79 cut-off events. [2021-03-24 13:57:19,289 INFO L130 PetriNetUnfolder]: For 170/170 co-relation queries the response was YES. [2021-03-24 13:57:19,289 INFO L84 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 79 events. 13/79 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 345 event pairs, 3 based on Foata normal form. 1/80 useless extension candidates. Maximal degree in co-relation 346. Up to 28 conditions per place. [2021-03-24 13:57:19,290 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 19 selfloop transitions, 7 changer transitions 4/34 dead transitions. [2021-03-24 13:57:19,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 34 transitions, 304 flow [2021-03-24 13:57:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:19,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2021-03-24 13:57:19,294 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2021-03-24 13:57:19,294 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 126 transitions. [2021-03-24 13:57:19,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 126 transitions. [2021-03-24 13:57:19,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:19,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 126 transitions. [2021-03-24 13:57:19,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:19,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:19,296 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:19,296 INFO L185 Difference]: Start difference. First operand has 50 places, 16 transitions, 107 flow. Second operand 9 states and 126 transitions. [2021-03-24 13:57:19,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 34 transitions, 304 flow [2021-03-24 13:57:19,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 34 transitions, 276 flow, removed 7 selfloop flow, removed 5 redundant places. [2021-03-24 13:57:19,298 INFO L241 Difference]: Finished difference. Result has 56 places, 19 transitions, 150 flow [2021-03-24 13:57:19,298 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=150, PETRI_PLACES=56, PETRI_TRANSITIONS=19} [2021-03-24 13:57:19,298 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 37 predicate places. [2021-03-24 13:57:19,298 INFO L480 AbstractCegarLoop]: Abstraction has has 56 places, 19 transitions, 150 flow [2021-03-24 13:57:19,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:19,298 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:19,298 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:19,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-03-24 13:57:19,298 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:19,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:19,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1772515950, now seen corresponding path program 6 times [2021-03-24 13:57:19,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:19,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168349372] [2021-03-24 13:57:19,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:19,307 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,307 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:19,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:19,312 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,312 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:19,316 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,317 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:19,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:19,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:19,344 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:19,353 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:19,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:19,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168349372] [2021-03-24 13:57:19,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:19,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:19,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271737387] [2021-03-24 13:57:19,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:19,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:19,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:19,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:19,363 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:19,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 19 transitions, 150 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:19,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:19,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:19,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:19,489 INFO L129 PetriNetUnfolder]: 17/101 cut-off events. [2021-03-24 13:57:19,489 INFO L130 PetriNetUnfolder]: For 297/297 co-relation queries the response was YES. [2021-03-24 13:57:19,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 101 events. 17/101 cut-off events. For 297/297 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 478 event pairs, 12 based on Foata normal form. 1/102 useless extension candidates. Maximal degree in co-relation 488. Up to 43 conditions per place. [2021-03-24 13:57:19,490 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 23 selfloop transitions, 7 changer transitions 4/38 dead transitions. [2021-03-24 13:57:19,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 38 transitions, 368 flow [2021-03-24 13:57:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:19,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2021-03-24 13:57:19,491 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3386243386243386 [2021-03-24 13:57:19,491 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 128 transitions. [2021-03-24 13:57:19,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 128 transitions. [2021-03-24 13:57:19,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:19,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 128 transitions. [2021-03-24 13:57:19,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 14.222222222222221) internal successors, (128), 9 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:19,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:19,492 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:19,492 INFO L185 Difference]: Start difference. First operand has 56 places, 19 transitions, 150 flow. Second operand 9 states and 128 transitions. [2021-03-24 13:57:19,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 38 transitions, 368 flow [2021-03-24 13:57:19,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 38 transitions, 345 flow, removed 6 selfloop flow, removed 4 redundant places. [2021-03-24 13:57:19,494 INFO L241 Difference]: Finished difference. Result has 65 places, 22 transitions, 203 flow [2021-03-24 13:57:19,494 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=203, PETRI_PLACES=65, PETRI_TRANSITIONS=22} [2021-03-24 13:57:19,496 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 46 predicate places. [2021-03-24 13:57:19,496 INFO L480 AbstractCegarLoop]: Abstraction has has 65 places, 22 transitions, 203 flow [2021-03-24 13:57:19,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:19,496 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:19,496 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:19,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-03-24 13:57:19,497 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:19,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:19,497 INFO L82 PathProgramCache]: Analyzing trace with hash -587431696, now seen corresponding path program 7 times [2021-03-24 13:57:19,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:19,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687684364] [2021-03-24 13:57:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:19,508 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,508 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:19,509 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,509 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:19,513 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:19,518 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,518 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:19,524 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,525 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:19,533 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,533 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:19,541 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,541 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:19,549 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:19,549 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:19,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687684364] [2021-03-24 13:57:19,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:19,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:19,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043917111] [2021-03-24 13:57:19,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:19,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:19,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:19,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:19,559 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:19,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 22 transitions, 203 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:19,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:19,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:19,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:19,688 INFO L129 PetriNetUnfolder]: 16/112 cut-off events. [2021-03-24 13:57:19,688 INFO L130 PetriNetUnfolder]: For 504/504 co-relation queries the response was YES. [2021-03-24 13:57:19,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 112 events. 16/112 cut-off events. For 504/504 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 587 event pairs, 9 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 595. Up to 33 conditions per place. [2021-03-24 13:57:19,689 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 25 selfloop transitions, 9 changer transitions 5/43 dead transitions. [2021-03-24 13:57:19,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 43 transitions, 473 flow [2021-03-24 13:57:19,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:19,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2021-03-24 13:57:19,690 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3386243386243386 [2021-03-24 13:57:19,690 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 128 transitions. [2021-03-24 13:57:19,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 128 transitions. [2021-03-24 13:57:19,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:19,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 128 transitions. [2021-03-24 13:57:19,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 14.222222222222221) internal successors, (128), 9 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:19,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:19,691 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:19,691 INFO L185 Difference]: Start difference. First operand has 65 places, 22 transitions, 203 flow. Second operand 9 states and 128 transitions. [2021-03-24 13:57:19,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 43 transitions, 473 flow [2021-03-24 13:57:19,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 43 transitions, 433 flow, removed 18 selfloop flow, removed 4 redundant places. [2021-03-24 13:57:19,694 INFO L241 Difference]: Finished difference. Result has 73 places, 26 transitions, 274 flow [2021-03-24 13:57:19,694 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=274, PETRI_PLACES=73, PETRI_TRANSITIONS=26} [2021-03-24 13:57:19,694 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 54 predicate places. [2021-03-24 13:57:19,694 INFO L480 AbstractCegarLoop]: Abstraction has has 73 places, 26 transitions, 274 flow [2021-03-24 13:57:19,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:19,694 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:19,695 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:19,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-03-24 13:57:19,695 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:19,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:19,695 INFO L82 PathProgramCache]: Analyzing trace with hash -830959082, now seen corresponding path program 8 times [2021-03-24 13:57:19,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:19,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810167998] [2021-03-24 13:57:19,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:19,701 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,701 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:19,702 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:19,706 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:19,711 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:19,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:19,722 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,722 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:19,729 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,729 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:19,738 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:19,738 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:19,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810167998] [2021-03-24 13:57:19,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:19,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:19,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869611] [2021-03-24 13:57:19,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:19,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:19,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:19,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:19,747 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:19,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 26 transitions, 274 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:19,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:19,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:19,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:19,859 INFO L129 PetriNetUnfolder]: 15/113 cut-off events. [2021-03-24 13:57:19,859 INFO L130 PetriNetUnfolder]: For 600/600 co-relation queries the response was YES. [2021-03-24 13:57:19,860 INFO L84 FinitePrefix]: Finished finitePrefix Result has 651 conditions, 113 events. 15/113 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 605 event pairs, 1 based on Foata normal form. 1/114 useless extension candidates. Maximal degree in co-relation 622. Up to 50 conditions per place. [2021-03-24 13:57:19,860 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 23 selfloop transitions, 10 changer transitions 6/43 dead transitions. [2021-03-24 13:57:19,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 43 transitions, 535 flow [2021-03-24 13:57:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2021-03-24 13:57:19,861 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3253968253968254 [2021-03-24 13:57:19,861 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 123 transitions. [2021-03-24 13:57:19,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 123 transitions. [2021-03-24 13:57:19,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:19,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 123 transitions. [2021-03-24 13:57:19,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:19,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:19,867 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:19,867 INFO L185 Difference]: Start difference. First operand has 73 places, 26 transitions, 274 flow. Second operand 9 states and 123 transitions. [2021-03-24 13:57:19,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 43 transitions, 535 flow [2021-03-24 13:57:19,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 43 transitions, 506 flow, removed 13 selfloop flow, removed 3 redundant places. [2021-03-24 13:57:19,870 INFO L241 Difference]: Finished difference. Result has 80 places, 28 transitions, 315 flow [2021-03-24 13:57:19,870 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=315, PETRI_PLACES=80, PETRI_TRANSITIONS=28} [2021-03-24 13:57:19,870 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 61 predicate places. [2021-03-24 13:57:19,870 INFO L480 AbstractCegarLoop]: Abstraction has has 80 places, 28 transitions, 315 flow [2021-03-24 13:57:19,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:19,871 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:19,871 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:19,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-03-24 13:57:19,871 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:19,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:19,871 INFO L82 PathProgramCache]: Analyzing trace with hash 304743010, now seen corresponding path program 9 times [2021-03-24 13:57:19,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:19,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025678076] [2021-03-24 13:57:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:19,879 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,879 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:19,880 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,880 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:19,884 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,884 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:19,889 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,889 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:19,895 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,895 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:19,903 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:19,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:19,911 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:19,919 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:19,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:19,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025678076] [2021-03-24 13:57:19,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:19,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:19,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154533106] [2021-03-24 13:57:19,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:19,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:19,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:19,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:19,930 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:19,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 28 transitions, 315 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:19,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:19,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:19,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:20,076 INFO L129 PetriNetUnfolder]: 14/109 cut-off events. [2021-03-24 13:57:20,076 INFO L130 PetriNetUnfolder]: For 631/631 co-relation queries the response was YES. [2021-03-24 13:57:20,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 109 events. 14/109 cut-off events. For 631/631 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 580 event pairs, 11 based on Foata normal form. 1/110 useless extension candidates. Maximal degree in co-relation 636. Up to 33 conditions per place. [2021-03-24 13:57:20,077 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 25 selfloop transitions, 10 changer transitions 3/42 dead transitions. [2021-03-24 13:57:20,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 42 transitions, 529 flow [2021-03-24 13:57:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2021-03-24 13:57:20,078 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2021-03-24 13:57:20,078 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 129 transitions. [2021-03-24 13:57:20,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 129 transitions. [2021-03-24 13:57:20,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:20,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 129 transitions. [2021-03-24 13:57:20,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,079 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,079 INFO L185 Difference]: Start difference. First operand has 80 places, 28 transitions, 315 flow. Second operand 9 states and 129 transitions. [2021-03-24 13:57:20,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 42 transitions, 529 flow [2021-03-24 13:57:20,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 42 transitions, 490 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-03-24 13:57:20,082 INFO L241 Difference]: Finished difference. Result has 88 places, 31 transitions, 372 flow [2021-03-24 13:57:20,082 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=372, PETRI_PLACES=88, PETRI_TRANSITIONS=31} [2021-03-24 13:57:20,083 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 69 predicate places. [2021-03-24 13:57:20,083 INFO L480 AbstractCegarLoop]: Abstraction has has 88 places, 31 transitions, 372 flow [2021-03-24 13:57:20,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:20,083 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:20,083 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:20,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-03-24 13:57:20,083 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:20,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:20,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1322548090, now seen corresponding path program 10 times [2021-03-24 13:57:20,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:20,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279205018] [2021-03-24 13:57:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:20,090 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,091 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:20,091 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,091 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:20,095 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,101 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,101 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:20,115 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,123 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,123 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:20,131 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:20,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:20,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279205018] [2021-03-24 13:57:20,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:20,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:20,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503116701] [2021-03-24 13:57:20,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:20,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:20,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:20,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:20,140 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:20,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 31 transitions, 372 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:20,140 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:20,140 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:20,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:20,257 INFO L129 PetriNetUnfolder]: 12/118 cut-off events. [2021-03-24 13:57:20,257 INFO L130 PetriNetUnfolder]: For 854/858 co-relation queries the response was YES. [2021-03-24 13:57:20,258 INFO L84 FinitePrefix]: Finished finitePrefix Result has 732 conditions, 118 events. 12/118 cut-off events. For 854/858 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 674 event pairs, 9 based on Foata normal form. 3/121 useless extension candidates. Maximal degree in co-relation 696. Up to 52 conditions per place. [2021-03-24 13:57:20,258 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 24 selfloop transitions, 12 changer transitions 6/46 dead transitions. [2021-03-24 13:57:20,258 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 46 transitions, 607 flow [2021-03-24 13:57:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2021-03-24 13:57:20,259 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2021-03-24 13:57:20,259 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 126 transitions. [2021-03-24 13:57:20,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 126 transitions. [2021-03-24 13:57:20,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:20,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 126 transitions. [2021-03-24 13:57:20,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,260 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,260 INFO L185 Difference]: Start difference. First operand has 88 places, 31 transitions, 372 flow. Second operand 9 states and 126 transitions. [2021-03-24 13:57:20,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 46 transitions, 607 flow [2021-03-24 13:57:20,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 46 transitions, 570 flow, removed 14 selfloop flow, removed 4 redundant places. [2021-03-24 13:57:20,264 INFO L241 Difference]: Finished difference. Result has 95 places, 34 transitions, 428 flow [2021-03-24 13:57:20,264 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=428, PETRI_PLACES=95, PETRI_TRANSITIONS=34} [2021-03-24 13:57:20,264 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 76 predicate places. [2021-03-24 13:57:20,265 INFO L480 AbstractCegarLoop]: Abstraction has has 95 places, 34 transitions, 428 flow [2021-03-24 13:57:20,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:20,265 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:20,265 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:20,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-03-24 13:57:20,265 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:20,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:20,265 INFO L82 PathProgramCache]: Analyzing trace with hash -841222562, now seen corresponding path program 11 times [2021-03-24 13:57:20,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:20,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096814859] [2021-03-24 13:57:20,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:20,271 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,272 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:20,273 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,273 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:20,277 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,277 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,282 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,282 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:20,287 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,287 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:20,293 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,293 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,300 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:20,312 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:20,312 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:20,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096814859] [2021-03-24 13:57:20,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:20,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:20,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193216246] [2021-03-24 13:57:20,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:20,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:20,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:20,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:20,321 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:20,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 34 transitions, 428 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:20,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:20,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:20,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:20,427 INFO L129 PetriNetUnfolder]: 12/116 cut-off events. [2021-03-24 13:57:20,427 INFO L130 PetriNetUnfolder]: For 794/794 co-relation queries the response was YES. [2021-03-24 13:57:20,428 INFO L84 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 116 events. 12/116 cut-off events. For 794/794 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 662 event pairs, 3 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 687. Up to 55 conditions per place. [2021-03-24 13:57:20,428 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 25 selfloop transitions, 9 changer transitions 11/49 dead transitions. [2021-03-24 13:57:20,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 49 transitions, 699 flow [2021-03-24 13:57:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2021-03-24 13:57:20,429 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.32275132275132273 [2021-03-24 13:57:20,429 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 122 transitions. [2021-03-24 13:57:20,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 122 transitions. [2021-03-24 13:57:20,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:20,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 122 transitions. [2021-03-24 13:57:20,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,432 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,432 INFO L185 Difference]: Start difference. First operand has 95 places, 34 transitions, 428 flow. Second operand 9 states and 122 transitions. [2021-03-24 13:57:20,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 49 transitions, 699 flow [2021-03-24 13:57:20,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 49 transitions, 672 flow, removed 9 selfloop flow, removed 3 redundant places. [2021-03-24 13:57:20,436 INFO L241 Difference]: Finished difference. Result has 100 places, 30 transitions, 358 flow [2021-03-24 13:57:20,437 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=358, PETRI_PLACES=100, PETRI_TRANSITIONS=30} [2021-03-24 13:57:20,437 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 81 predicate places. [2021-03-24 13:57:20,437 INFO L480 AbstractCegarLoop]: Abstraction has has 100 places, 30 transitions, 358 flow [2021-03-24 13:57:20,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:20,437 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:20,437 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:20,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-03-24 13:57:20,437 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1334757704, now seen corresponding path program 12 times [2021-03-24 13:57:20,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:20,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642851459] [2021-03-24 13:57:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:20,450 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,451 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:20,451 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,451 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:20,455 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,455 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,460 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,461 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,466 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,467 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:20,472 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,473 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,480 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,480 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:20,490 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:20,490 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:20,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642851459] [2021-03-24 13:57:20,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:20,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:20,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858068783] [2021-03-24 13:57:20,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:20,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:20,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:20,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:20,501 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:20,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 30 transitions, 358 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:20,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:20,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:20,501 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:20,626 INFO L129 PetriNetUnfolder]: 11/106 cut-off events. [2021-03-24 13:57:20,626 INFO L130 PetriNetUnfolder]: For 692/696 co-relation queries the response was YES. [2021-03-24 13:57:20,627 INFO L84 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 106 events. 11/106 cut-off events. For 692/696 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 577 event pairs, 8 based on Foata normal form. 3/109 useless extension candidates. Maximal degree in co-relation 639. Up to 52 conditions per place. [2021-03-24 13:57:20,627 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 22 selfloop transitions, 11 changer transitions 4/41 dead transitions. [2021-03-24 13:57:20,627 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 41 transitions, 567 flow [2021-03-24 13:57:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:20,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2021-03-24 13:57:20,628 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3306878306878307 [2021-03-24 13:57:20,628 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 125 transitions. [2021-03-24 13:57:20,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 125 transitions. [2021-03-24 13:57:20,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:20,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 125 transitions. [2021-03-24 13:57:20,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,630 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,630 INFO L185 Difference]: Start difference. First operand has 100 places, 30 transitions, 358 flow. Second operand 9 states and 125 transitions. [2021-03-24 13:57:20,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 41 transitions, 567 flow [2021-03-24 13:57:20,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 41 transitions, 509 flow, removed 18 selfloop flow, removed 10 redundant places. [2021-03-24 13:57:20,633 INFO L241 Difference]: Finished difference. Result has 93 places, 32 transitions, 379 flow [2021-03-24 13:57:20,633 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=379, PETRI_PLACES=93, PETRI_TRANSITIONS=32} [2021-03-24 13:57:20,635 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 74 predicate places. [2021-03-24 13:57:20,635 INFO L480 AbstractCegarLoop]: Abstraction has has 93 places, 32 transitions, 379 flow [2021-03-24 13:57:20,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:20,635 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:20,635 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:20,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-03-24 13:57:20,635 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:20,635 INFO L82 PathProgramCache]: Analyzing trace with hash 137336254, now seen corresponding path program 13 times [2021-03-24 13:57:20,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:20,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463339200] [2021-03-24 13:57:20,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:20,641 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,641 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:20,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,642 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:20,645 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,646 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,657 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:20,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,665 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:20,673 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,673 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:20,681 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:20,681 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:20,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463339200] [2021-03-24 13:57:20,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:20,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:20,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144599820] [2021-03-24 13:57:20,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:20,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:20,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:20,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:20,691 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:20,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 32 transitions, 379 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:20,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:20,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:20,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:20,813 INFO L129 PetriNetUnfolder]: 11/103 cut-off events. [2021-03-24 13:57:20,813 INFO L130 PetriNetUnfolder]: For 554/554 co-relation queries the response was YES. [2021-03-24 13:57:20,813 INFO L84 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 103 events. 11/103 cut-off events. For 554/554 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 548 event pairs, 8 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 611. Up to 52 conditions per place. [2021-03-24 13:57:20,814 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 20 selfloop transitions, 11 changer transitions 7/42 dead transitions. [2021-03-24 13:57:20,814 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 42 transitions, 577 flow [2021-03-24 13:57:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2021-03-24 13:57:20,815 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.328042328042328 [2021-03-24 13:57:20,815 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 124 transitions. [2021-03-24 13:57:20,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 124 transitions. [2021-03-24 13:57:20,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:20,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 124 transitions. [2021-03-24 13:57:20,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,816 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,816 INFO L185 Difference]: Start difference. First operand has 93 places, 32 transitions, 379 flow. Second operand 9 states and 124 transitions. [2021-03-24 13:57:20,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 42 transitions, 577 flow [2021-03-24 13:57:20,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 42 transitions, 552 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-03-24 13:57:20,820 INFO L241 Difference]: Finished difference. Result has 99 places, 33 transitions, 412 flow [2021-03-24 13:57:20,820 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=412, PETRI_PLACES=99, PETRI_TRANSITIONS=33} [2021-03-24 13:57:20,820 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 80 predicate places. [2021-03-24 13:57:20,820 INFO L480 AbstractCegarLoop]: Abstraction has has 99 places, 33 transitions, 412 flow [2021-03-24 13:57:20,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:20,820 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:20,820 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:20,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-03-24 13:57:20,821 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:20,821 INFO L82 PathProgramCache]: Analyzing trace with hash -31276110, now seen corresponding path program 14 times [2021-03-24 13:57:20,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:20,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717777413] [2021-03-24 13:57:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:20,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:20,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:20,831 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,831 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,840 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:20,853 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,853 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,860 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:20,861 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:20,867 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:20,867 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:20,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717777413] [2021-03-24 13:57:20,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:20,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:20,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861059481] [2021-03-24 13:57:20,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:20,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:20,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:20,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:20,876 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:20,876 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 33 transitions, 412 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:20,876 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:20,876 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:20,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:20,994 INFO L129 PetriNetUnfolder]: 11/98 cut-off events. [2021-03-24 13:57:20,994 INFO L130 PetriNetUnfolder]: For 600/604 co-relation queries the response was YES. [2021-03-24 13:57:20,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 98 events. 11/98 cut-off events. For 600/604 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 504 event pairs, 8 based on Foata normal form. 3/101 useless extension candidates. Maximal degree in co-relation 600. Up to 52 conditions per place. [2021-03-24 13:57:20,995 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 19 selfloop transitions, 8 changer transitions 9/40 dead transitions. [2021-03-24 13:57:20,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 40 transitions, 568 flow [2021-03-24 13:57:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2021-03-24 13:57:20,996 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.328042328042328 [2021-03-24 13:57:20,996 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 124 transitions. [2021-03-24 13:57:20,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 124 transitions. [2021-03-24 13:57:20,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:20,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 124 transitions. [2021-03-24 13:57:20,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,997 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:20,997 INFO L185 Difference]: Start difference. First operand has 99 places, 33 transitions, 412 flow. Second operand 9 states and 124 transitions. [2021-03-24 13:57:20,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 40 transitions, 568 flow [2021-03-24 13:57:21,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 40 transitions, 526 flow, removed 13 selfloop flow, removed 6 redundant places. [2021-03-24 13:57:21,001 INFO L241 Difference]: Finished difference. Result has 100 places, 29 transitions, 338 flow [2021-03-24 13:57:21,001 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=338, PETRI_PLACES=100, PETRI_TRANSITIONS=29} [2021-03-24 13:57:21,001 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 81 predicate places. [2021-03-24 13:57:21,001 INFO L480 AbstractCegarLoop]: Abstraction has has 100 places, 29 transitions, 338 flow [2021-03-24 13:57:21,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:21,002 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:21,002 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:21,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-03-24 13:57:21,002 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:21,002 INFO L82 PathProgramCache]: Analyzing trace with hash -39161006, now seen corresponding path program 15 times [2021-03-24 13:57:21,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:21,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649816522] [2021-03-24 13:57:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:21,009 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:21,010 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,010 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:21,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,014 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,019 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,019 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:21,035 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,036 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,043 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,044 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:21,054 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:21,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:21,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649816522] [2021-03-24 13:57:21,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:21,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:21,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205254799] [2021-03-24 13:57:21,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:21,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:21,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:21,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:21,065 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:21,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 29 transitions, 338 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:21,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:21,065 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:21,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:21,186 INFO L129 PetriNetUnfolder]: 11/86 cut-off events. [2021-03-24 13:57:21,186 INFO L130 PetriNetUnfolder]: For 461/461 co-relation queries the response was YES. [2021-03-24 13:57:21,187 INFO L84 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 86 events. 11/86 cut-off events. For 461/461 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 406 event pairs, 8 based on Foata normal form. 1/87 useless extension candidates. Maximal degree in co-relation 519. Up to 52 conditions per place. [2021-03-24 13:57:21,187 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 15 selfloop transitions, 6 changer transitions 9/34 dead transitions. [2021-03-24 13:57:21,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 34 transitions, 456 flow [2021-03-24 13:57:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2021-03-24 13:57:21,188 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3148148148148148 [2021-03-24 13:57:21,188 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 119 transitions. [2021-03-24 13:57:21,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 119 transitions. [2021-03-24 13:57:21,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:21,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 119 transitions. [2021-03-24 13:57:21,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:21,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:21,189 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:21,189 INFO L185 Difference]: Start difference. First operand has 100 places, 29 transitions, 338 flow. Second operand 9 states and 119 transitions. [2021-03-24 13:57:21,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 34 transitions, 456 flow [2021-03-24 13:57:21,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 34 transitions, 409 flow, removed 9 selfloop flow, removed 14 redundant places. [2021-03-24 13:57:21,194 INFO L241 Difference]: Finished difference. Result has 90 places, 24 transitions, 246 flow [2021-03-24 13:57:21,194 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=246, PETRI_PLACES=90, PETRI_TRANSITIONS=24} [2021-03-24 13:57:21,194 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 71 predicate places. [2021-03-24 13:57:21,194 INFO L480 AbstractCegarLoop]: Abstraction has has 90 places, 24 transitions, 246 flow [2021-03-24 13:57:21,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:21,194 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:21,194 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:21,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-03-24 13:57:21,194 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:21,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:21,195 INFO L82 PathProgramCache]: Analyzing trace with hash -591594218, now seen corresponding path program 16 times [2021-03-24 13:57:21,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:21,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047988616] [2021-03-24 13:57:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:21,206 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,207 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:21,207 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,207 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:21,211 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,211 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:21,216 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,216 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:21,236 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,236 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:21,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:21,253 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:21,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:21,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047988616] [2021-03-24 13:57:21,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:21,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:21,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998393990] [2021-03-24 13:57:21,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:21,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:21,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:21,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:21,264 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:21,264 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 24 transitions, 246 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:21,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:21,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:21,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:21,390 INFO L129 PetriNetUnfolder]: 11/76 cut-off events. [2021-03-24 13:57:21,391 INFO L130 PetriNetUnfolder]: For 372/376 co-relation queries the response was YES. [2021-03-24 13:57:21,391 INFO L84 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 76 events. 11/76 cut-off events. For 372/376 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 324 event pairs, 7 based on Foata normal form. 3/79 useless extension candidates. Maximal degree in co-relation 449. Up to 33 conditions per place. [2021-03-24 13:57:21,392 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 17 selfloop transitions, 8 changer transitions 5/34 dead transitions. [2021-03-24 13:57:21,392 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 34 transitions, 402 flow [2021-03-24 13:57:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2021-03-24 13:57:21,392 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.328042328042328 [2021-03-24 13:57:21,392 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 124 transitions. [2021-03-24 13:57:21,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 124 transitions. [2021-03-24 13:57:21,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:21,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 124 transitions. [2021-03-24 13:57:21,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:21,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:21,393 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:21,393 INFO L185 Difference]: Start difference. First operand has 90 places, 24 transitions, 246 flow. Second operand 9 states and 124 transitions. [2021-03-24 13:57:21,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 34 transitions, 402 flow [2021-03-24 13:57:21,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 34 transitions, 356 flow, removed 16 selfloop flow, removed 8 redundant places. [2021-03-24 13:57:21,396 INFO L241 Difference]: Finished difference. Result has 80 places, 23 transitions, 235 flow [2021-03-24 13:57:21,396 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=235, PETRI_PLACES=80, PETRI_TRANSITIONS=23} [2021-03-24 13:57:21,396 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 61 predicate places. [2021-03-24 13:57:21,396 INFO L480 AbstractCegarLoop]: Abstraction has has 80 places, 23 transitions, 235 flow [2021-03-24 13:57:21,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:21,396 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:21,396 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:21,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-03-24 13:57:21,397 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:21,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:21,397 INFO L82 PathProgramCache]: Analyzing trace with hash -763496506, now seen corresponding path program 17 times [2021-03-24 13:57:21,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:21,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983106461] [2021-03-24 13:57:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:21,403 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:21,404 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:21,408 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:21,413 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,413 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,420 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:21,429 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,429 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,437 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,438 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:21,447 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:21,447 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:21,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983106461] [2021-03-24 13:57:21,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:21,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:21,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170737257] [2021-03-24 13:57:21,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:21,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:21,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:21,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:21,458 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:21,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 23 transitions, 235 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:21,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:21,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:21,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:21,573 INFO L129 PetriNetUnfolder]: 10/71 cut-off events. [2021-03-24 13:57:21,573 INFO L130 PetriNetUnfolder]: For 313/317 co-relation queries the response was YES. [2021-03-24 13:57:21,574 INFO L84 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 71 events. 10/71 cut-off events. For 313/317 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 293 event pairs, 7 based on Foata normal form. 3/74 useless extension candidates. Maximal degree in co-relation 418. Up to 33 conditions per place. [2021-03-24 13:57:21,574 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 18 selfloop transitions, 9 changer transitions 2/33 dead transitions. [2021-03-24 13:57:21,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 33 transitions, 379 flow [2021-03-24 13:57:21,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:21,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2021-03-24 13:57:21,576 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3306878306878307 [2021-03-24 13:57:21,576 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 125 transitions. [2021-03-24 13:57:21,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 125 transitions. [2021-03-24 13:57:21,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:21,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 125 transitions. [2021-03-24 13:57:21,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:21,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:21,578 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:21,578 INFO L185 Difference]: Start difference. First operand has 80 places, 23 transitions, 235 flow. Second operand 9 states and 125 transitions. [2021-03-24 13:57:21,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 33 transitions, 379 flow [2021-03-24 13:57:21,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 33 transitions, 303 flow, removed 15 selfloop flow, removed 14 redundant places. [2021-03-24 13:57:21,580 INFO L241 Difference]: Finished difference. Result has 75 places, 25 transitions, 230 flow [2021-03-24 13:57:21,580 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=230, PETRI_PLACES=75, PETRI_TRANSITIONS=25} [2021-03-24 13:57:21,580 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 56 predicate places. [2021-03-24 13:57:21,580 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 25 transitions, 230 flow [2021-03-24 13:57:21,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:21,581 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:21,581 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:21,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-03-24 13:57:21,581 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:21,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:21,581 INFO L82 PathProgramCache]: Analyzing trace with hash -753665476, now seen corresponding path program 18 times [2021-03-24 13:57:21,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:21,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090377065] [2021-03-24 13:57:21,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:21,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:21,592 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:21,596 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,596 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:21,601 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,601 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:21,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,623 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:21,631 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:21,631 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:21,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090377065] [2021-03-24 13:57:21,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:21,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:21,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121650551] [2021-03-24 13:57:21,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:21,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:21,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:21,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:21,641 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:21,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 25 transitions, 230 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:21,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:21,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:21,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:21,756 INFO L129 PetriNetUnfolder]: 10/68 cut-off events. [2021-03-24 13:57:21,756 INFO L130 PetriNetUnfolder]: For 208/212 co-relation queries the response was YES. [2021-03-24 13:57:21,757 INFO L84 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 68 events. 10/68 cut-off events. For 208/212 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 270 event pairs, 7 based on Foata normal form. 3/71 useless extension candidates. Maximal degree in co-relation 387. Up to 33 conditions per place. [2021-03-24 13:57:21,757 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 16 selfloop transitions, 5 changer transitions 7/32 dead transitions. [2021-03-24 13:57:21,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 32 transitions, 343 flow [2021-03-24 13:57:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:21,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2021-03-24 13:57:21,760 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.328042328042328 [2021-03-24 13:57:21,760 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 124 transitions. [2021-03-24 13:57:21,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 124 transitions. [2021-03-24 13:57:21,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:21,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 124 transitions. [2021-03-24 13:57:21,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:21,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:21,761 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:21,761 INFO L185 Difference]: Start difference. First operand has 75 places, 25 transitions, 230 flow. Second operand 9 states and 124 transitions. [2021-03-24 13:57:21,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 32 transitions, 343 flow [2021-03-24 13:57:21,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 32 transitions, 324 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-03-24 13:57:21,763 INFO L241 Difference]: Finished difference. Result has 78 places, 20 transitions, 171 flow [2021-03-24 13:57:21,763 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=171, PETRI_PLACES=78, PETRI_TRANSITIONS=20} [2021-03-24 13:57:21,763 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 59 predicate places. [2021-03-24 13:57:21,763 INFO L480 AbstractCegarLoop]: Abstraction has has 78 places, 20 transitions, 171 flow [2021-03-24 13:57:21,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:21,764 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:21,764 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:21,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-03-24 13:57:21,764 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:21,764 INFO L82 PathProgramCache]: Analyzing trace with hash 541884066, now seen corresponding path program 19 times [2021-03-24 13:57:21,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:21,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347253505] [2021-03-24 13:57:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:21,774 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,774 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:21,775 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,775 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:21,779 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,779 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:21,784 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,791 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:21,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:21,804 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,804 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:21,814 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:21,814 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:21,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347253505] [2021-03-24 13:57:21,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:21,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:21,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717128826] [2021-03-24 13:57:21,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:21,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:21,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:21,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:21,825 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:21,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 20 transitions, 171 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:21,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:21,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:21,825 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:21,947 INFO L129 PetriNetUnfolder]: 9/63 cut-off events. [2021-03-24 13:57:21,947 INFO L130 PetriNetUnfolder]: For 178/178 co-relation queries the response was YES. [2021-03-24 13:57:21,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 63 events. 9/63 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 235 event pairs, 7 based on Foata normal form. 1/64 useless extension candidates. Maximal degree in co-relation 341. Up to 33 conditions per place. [2021-03-24 13:57:21,947 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 14 selfloop transitions, 7 changer transitions 3/28 dead transitions. [2021-03-24 13:57:21,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 28 transitions, 290 flow [2021-03-24 13:57:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2021-03-24 13:57:21,948 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3201058201058201 [2021-03-24 13:57:21,948 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 121 transitions. [2021-03-24 13:57:21,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 121 transitions. [2021-03-24 13:57:21,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:21,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 121 transitions. [2021-03-24 13:57:21,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:21,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:21,949 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:21,949 INFO L185 Difference]: Start difference. First operand has 78 places, 20 transitions, 171 flow. Second operand 9 states and 121 transitions. [2021-03-24 13:57:21,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 28 transitions, 290 flow [2021-03-24 13:57:21,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 28 transitions, 248 flow, removed 10 selfloop flow, removed 10 redundant places. [2021-03-24 13:57:21,950 INFO L241 Difference]: Finished difference. Result has 72 places, 22 transitions, 186 flow [2021-03-24 13:57:21,950 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=186, PETRI_PLACES=72, PETRI_TRANSITIONS=22} [2021-03-24 13:57:21,950 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 53 predicate places. [2021-03-24 13:57:21,950 INFO L480 AbstractCegarLoop]: Abstraction has has 72 places, 22 transitions, 186 flow [2021-03-24 13:57:21,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:21,950 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:21,950 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:21,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-03-24 13:57:21,951 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:21,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:21,951 INFO L82 PathProgramCache]: Analyzing trace with hash 138509230, now seen corresponding path program 20 times [2021-03-24 13:57:21,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:21,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838825115] [2021-03-24 13:57:21,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:21,957 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:21,957 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,958 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:21,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,962 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:21,966 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,967 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,974 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:21,982 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:21,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:21,990 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:21,998 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:21,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:22,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838825115] [2021-03-24 13:57:22,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:22,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:22,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126712030] [2021-03-24 13:57:22,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:22,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:22,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:22,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:22,008 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:22,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 22 transitions, 186 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:22,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:22,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:22,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:22,124 INFO L129 PetriNetUnfolder]: 8/68 cut-off events. [2021-03-24 13:57:22,124 INFO L130 PetriNetUnfolder]: For 145/149 co-relation queries the response was YES. [2021-03-24 13:57:22,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 68 events. 8/68 cut-off events. For 145/149 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 280 event pairs, 8 based on Foata normal form. 3/71 useless extension candidates. Maximal degree in co-relation 352. Up to 33 conditions per place. [2021-03-24 13:57:22,126 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 15 selfloop transitions, 8 changer transitions 2/29 dead transitions. [2021-03-24 13:57:22,126 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 29 transitions, 289 flow [2021-03-24 13:57:22,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2021-03-24 13:57:22,127 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.32275132275132273 [2021-03-24 13:57:22,127 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 122 transitions. [2021-03-24 13:57:22,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 122 transitions. [2021-03-24 13:57:22,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:22,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 122 transitions. [2021-03-24 13:57:22,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,128 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,128 INFO L185 Difference]: Start difference. First operand has 72 places, 22 transitions, 186 flow. Second operand 9 states and 122 transitions. [2021-03-24 13:57:22,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 29 transitions, 289 flow [2021-03-24 13:57:22,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 29 transitions, 270 flow, removed 5 selfloop flow, removed 5 redundant places. [2021-03-24 13:57:22,131 INFO L241 Difference]: Finished difference. Result has 77 places, 24 transitions, 221 flow [2021-03-24 13:57:22,131 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=221, PETRI_PLACES=77, PETRI_TRANSITIONS=24} [2021-03-24 13:57:22,132 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 58 predicate places. [2021-03-24 13:57:22,132 INFO L480 AbstractCegarLoop]: Abstraction has has 77 places, 24 transitions, 221 flow [2021-03-24 13:57:22,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:22,132 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:22,132 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:22,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-03-24 13:57:22,132 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:22,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:22,133 INFO L82 PathProgramCache]: Analyzing trace with hash 136130646, now seen corresponding path program 21 times [2021-03-24 13:57:22,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:22,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560142146] [2021-03-24 13:57:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:22,142 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,142 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:22,142 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,142 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:22,146 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,146 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:22,151 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,151 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:22,157 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,157 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:22,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,163 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:22,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:22,179 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:22,179 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:22,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560142146] [2021-03-24 13:57:22,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:22,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:22,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931614029] [2021-03-24 13:57:22,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:22,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:22,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:22,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:22,189 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:22,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 24 transitions, 221 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:22,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:22,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:22,189 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:22,314 INFO L129 PetriNetUnfolder]: 7/67 cut-off events. [2021-03-24 13:57:22,314 INFO L130 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2021-03-24 13:57:22,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 67 events. 7/67 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 271 event pairs, 7 based on Foata normal form. 1/68 useless extension candidates. Maximal degree in co-relation 358. Up to 33 conditions per place. [2021-03-24 13:57:22,315 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 15 selfloop transitions, 9 changer transitions 2/30 dead transitions. [2021-03-24 13:57:22,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 30 transitions, 325 flow [2021-03-24 13:57:22,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2021-03-24 13:57:22,316 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.32275132275132273 [2021-03-24 13:57:22,316 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 122 transitions. [2021-03-24 13:57:22,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 122 transitions. [2021-03-24 13:57:22,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:22,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 122 transitions. [2021-03-24 13:57:22,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,317 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,317 INFO L185 Difference]: Start difference. First operand has 77 places, 24 transitions, 221 flow. Second operand 9 states and 122 transitions. [2021-03-24 13:57:22,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 30 transitions, 325 flow [2021-03-24 13:57:22,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 30 transitions, 307 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-03-24 13:57:22,318 INFO L241 Difference]: Finished difference. Result has 82 places, 25 transitions, 250 flow [2021-03-24 13:57:22,319 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=250, PETRI_PLACES=82, PETRI_TRANSITIONS=25} [2021-03-24 13:57:22,319 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 63 predicate places. [2021-03-24 13:57:22,319 INFO L480 AbstractCegarLoop]: Abstraction has has 82 places, 25 transitions, 250 flow [2021-03-24 13:57:22,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:22,319 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:22,319 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:22,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-03-24 13:57:22,319 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:22,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:22,319 INFO L82 PathProgramCache]: Analyzing trace with hash 128678200, now seen corresponding path program 22 times [2021-03-24 13:57:22,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:22,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442899808] [2021-03-24 13:57:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:22,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:22,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:22,329 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:22,338 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,339 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:22,346 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:22,357 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,357 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:22,366 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,366 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:22,376 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:22,377 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:22,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442899808] [2021-03-24 13:57:22,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:22,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:22,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339314838] [2021-03-24 13:57:22,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:22,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:22,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:22,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:22,387 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:22,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 25 transitions, 250 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:22,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:22,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:22,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:22,502 INFO L129 PetriNetUnfolder]: 7/62 cut-off events. [2021-03-24 13:57:22,502 INFO L130 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2021-03-24 13:57:22,502 INFO L84 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 62 events. 7/62 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 243 event pairs, 7 based on Foata normal form. 1/63 useless extension candidates. Maximal degree in co-relation 349. Up to 33 conditions per place. [2021-03-24 13:57:22,503 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 13 selfloop transitions, 6 changer transitions 6/29 dead transitions. [2021-03-24 13:57:22,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 29 transitions, 339 flow [2021-03-24 13:57:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:22,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:22,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2021-03-24 13:57:22,504 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3201058201058201 [2021-03-24 13:57:22,504 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 121 transitions. [2021-03-24 13:57:22,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 121 transitions. [2021-03-24 13:57:22,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:22,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 121 transitions. [2021-03-24 13:57:22,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,505 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,505 INFO L185 Difference]: Start difference. First operand has 82 places, 25 transitions, 250 flow. Second operand 9 states and 121 transitions. [2021-03-24 13:57:22,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 29 transitions, 339 flow [2021-03-24 13:57:22,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 29 transitions, 304 flow, removed 6 selfloop flow, removed 8 redundant places. [2021-03-24 13:57:22,506 INFO L241 Difference]: Finished difference. Result has 83 places, 22 transitions, 198 flow [2021-03-24 13:57:22,507 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=198, PETRI_PLACES=83, PETRI_TRANSITIONS=22} [2021-03-24 13:57:22,507 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 64 predicate places. [2021-03-24 13:57:22,507 INFO L480 AbstractCegarLoop]: Abstraction has has 83 places, 22 transitions, 198 flow [2021-03-24 13:57:22,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:22,507 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:22,507 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:22,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-03-24 13:57:22,507 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:22,507 INFO L82 PathProgramCache]: Analyzing trace with hash 126299616, now seen corresponding path program 23 times [2021-03-24 13:57:22,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:22,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250959510] [2021-03-24 13:57:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:22,515 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,515 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:22,515 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,516 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:22,519 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,519 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:22,524 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,524 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:22,530 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,531 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:22,537 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:22,545 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,545 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:22,555 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:22,555 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:22,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250959510] [2021-03-24 13:57:22,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:22,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:22,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767429199] [2021-03-24 13:57:22,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:22,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:22,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:22,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:22,565 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:22,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 22 transitions, 198 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:22,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:22,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:22,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:22,672 INFO L129 PetriNetUnfolder]: 7/53 cut-off events. [2021-03-24 13:57:22,672 INFO L130 PetriNetUnfolder]: For 131/135 co-relation queries the response was YES. [2021-03-24 13:57:22,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 53 events. 7/53 cut-off events. For 131/135 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 177 event pairs, 7 based on Foata normal form. 3/56 useless extension candidates. Maximal degree in co-relation 289. Up to 33 conditions per place. [2021-03-24 13:57:22,673 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 9 selfloop transitions, 2 changer transitions 9/24 dead transitions. [2021-03-24 13:57:22,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 24 transitions, 260 flow [2021-03-24 13:57:22,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:22,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2021-03-24 13:57:22,675 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.30952380952380953 [2021-03-24 13:57:22,675 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 117 transitions. [2021-03-24 13:57:22,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 117 transitions. [2021-03-24 13:57:22,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:22,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 117 transitions. [2021-03-24 13:57:22,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,676 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,676 INFO L185 Difference]: Start difference. First operand has 83 places, 22 transitions, 198 flow. Second operand 9 states and 117 transitions. [2021-03-24 13:57:22,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 24 transitions, 260 flow [2021-03-24 13:57:22,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 24 transitions, 232 flow, removed 6 selfloop flow, removed 10 redundant places. [2021-03-24 13:57:22,678 INFO L241 Difference]: Finished difference. Result has 77 places, 15 transitions, 107 flow [2021-03-24 13:57:22,678 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=107, PETRI_PLACES=77, PETRI_TRANSITIONS=15} [2021-03-24 13:57:22,678 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 58 predicate places. [2021-03-24 13:57:22,678 INFO L480 AbstractCegarLoop]: Abstraction has has 77 places, 15 transitions, 107 flow [2021-03-24 13:57:22,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:22,678 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:22,678 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:22,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-03-24 13:57:22,678 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:22,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:22,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1388973062, now seen corresponding path program 24 times [2021-03-24 13:57:22,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:22,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576784653] [2021-03-24 13:57:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:22,685 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:22,685 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,686 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:22,689 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,689 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:22,694 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,694 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:22,700 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:22,706 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:22,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:22,722 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:22,722 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:22,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576784653] [2021-03-24 13:57:22,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:22,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:22,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244011587] [2021-03-24 13:57:22,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:22,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:22,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:22,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:22,731 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:22,731 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 15 transitions, 107 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:22,731 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:22,732 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:22,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:22,840 INFO L129 PetriNetUnfolder]: 6/42 cut-off events. [2021-03-24 13:57:22,841 INFO L130 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2021-03-24 13:57:22,841 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 42 events. 6/42 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 114 event pairs, 0 based on Foata normal form. 1/43 useless extension candidates. Maximal degree in co-relation 198. Up to 9 conditions per place. [2021-03-24 13:57:22,841 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 11 selfloop transitions, 6 changer transitions 4/25 dead transitions. [2021-03-24 13:57:22,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 25 transitions, 215 flow [2021-03-24 13:57:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:22,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2021-03-24 13:57:22,842 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.30687830687830686 [2021-03-24 13:57:22,842 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 116 transitions. [2021-03-24 13:57:22,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 116 transitions. [2021-03-24 13:57:22,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:22,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 116 transitions. [2021-03-24 13:57:22,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,843 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,843 INFO L185 Difference]: Start difference. First operand has 77 places, 15 transitions, 107 flow. Second operand 9 states and 116 transitions. [2021-03-24 13:57:22,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 25 transitions, 215 flow [2021-03-24 13:57:22,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 25 transitions, 188 flow, removed 7 selfloop flow, removed 11 redundant places. [2021-03-24 13:57:22,844 INFO L241 Difference]: Finished difference. Result has 58 places, 15 transitions, 99 flow [2021-03-24 13:57:22,844 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=99, PETRI_PLACES=58, PETRI_TRANSITIONS=15} [2021-03-24 13:57:22,844 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 39 predicate places. [2021-03-24 13:57:22,844 INFO L480 AbstractCegarLoop]: Abstraction has has 58 places, 15 transitions, 99 flow [2021-03-24 13:57:22,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:22,844 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:22,844 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:22,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-03-24 13:57:22,844 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1378471358, now seen corresponding path program 25 times [2021-03-24 13:57:22,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:22,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921299209] [2021-03-24 13:57:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:22,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:22,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:22,855 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:22,860 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,860 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:22,866 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:22,873 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,874 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:22,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:22,889 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:22,889 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:22,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921299209] [2021-03-24 13:57:22,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:22,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:22,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906688523] [2021-03-24 13:57:22,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:22,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:22,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:22,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:22,898 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:22,899 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 15 transitions, 99 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:22,899 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:22,899 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:22,899 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:22,988 INFO L129 PetriNetUnfolder]: 5/41 cut-off events. [2021-03-24 13:57:22,988 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2021-03-24 13:57:22,989 INFO L84 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 41 events. 5/41 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 115 event pairs, 1 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 195. Up to 14 conditions per place. [2021-03-24 13:57:22,989 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 12 selfloop transitions, 6 changer transitions 4/26 dead transitions. [2021-03-24 13:57:22,989 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 26 transitions, 225 flow [2021-03-24 13:57:22,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:22,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2021-03-24 13:57:22,989 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3201058201058201 [2021-03-24 13:57:22,989 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 121 transitions. [2021-03-24 13:57:22,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 121 transitions. [2021-03-24 13:57:22,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:22,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 121 transitions. [2021-03-24 13:57:22,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,990 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:22,990 INFO L185 Difference]: Start difference. First operand has 58 places, 15 transitions, 99 flow. Second operand 9 states and 121 transitions. [2021-03-24 13:57:22,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 26 transitions, 225 flow [2021-03-24 13:57:22,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 26 transitions, 194 flow, removed 3 selfloop flow, removed 7 redundant places. [2021-03-24 13:57:22,991 INFO L241 Difference]: Finished difference. Result has 61 places, 16 transitions, 115 flow [2021-03-24 13:57:22,991 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=115, PETRI_PLACES=61, PETRI_TRANSITIONS=16} [2021-03-24 13:57:22,992 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 42 predicate places. [2021-03-24 13:57:22,992 INFO L480 AbstractCegarLoop]: Abstraction has has 61 places, 16 transitions, 115 flow [2021-03-24 13:57:22,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:22,992 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:22,992 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:22,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-03-24 13:57:22,992 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:22,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:22,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1202406548, now seen corresponding path program 26 times [2021-03-24 13:57:22,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:22,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140089484] [2021-03-24 13:57:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:22,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:22,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:22,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:23,003 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,003 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,015 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:23,021 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,022 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:23,039 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:23,039 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:23,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140089484] [2021-03-24 13:57:23,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:23,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:23,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138497092] [2021-03-24 13:57:23,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:23,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:23,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:23,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:23,049 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:23,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 16 transitions, 115 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:23,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:23,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:23,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:23,147 INFO L129 PetriNetUnfolder]: 4/38 cut-off events. [2021-03-24 13:57:23,148 INFO L130 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2021-03-24 13:57:23,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 38 events. 4/38 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 97 event pairs, 1 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 186. Up to 14 conditions per place. [2021-03-24 13:57:23,148 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 10 selfloop transitions, 7 changer transitions 3/24 dead transitions. [2021-03-24 13:57:23,148 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 24 transitions, 219 flow [2021-03-24 13:57:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2021-03-24 13:57:23,153 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3148148148148148 [2021-03-24 13:57:23,153 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 119 transitions. [2021-03-24 13:57:23,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 119 transitions. [2021-03-24 13:57:23,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:23,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 119 transitions. [2021-03-24 13:57:23,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,154 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,154 INFO L185 Difference]: Start difference. First operand has 61 places, 16 transitions, 115 flow. Second operand 9 states and 119 transitions. [2021-03-24 13:57:23,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 24 transitions, 219 flow [2021-03-24 13:57:23,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 24 transitions, 187 flow, removed 9 selfloop flow, removed 7 redundant places. [2021-03-24 13:57:23,155 INFO L241 Difference]: Finished difference. Result has 64 places, 18 transitions, 136 flow [2021-03-24 13:57:23,155 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=18} [2021-03-24 13:57:23,155 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 45 predicate places. [2021-03-24 13:57:23,155 INFO L480 AbstractCegarLoop]: Abstraction has has 64 places, 18 transitions, 136 flow [2021-03-24 13:57:23,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:23,155 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:23,155 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:23,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-03-24 13:57:23,155 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:23,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:23,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1212237578, now seen corresponding path program 27 times [2021-03-24 13:57:23,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:23,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747143183] [2021-03-24 13:57:23,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:23,161 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,162 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:23,162 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,162 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:23,166 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,171 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,177 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,177 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:23,185 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,185 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,192 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,192 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:23,200 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:23,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:23,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747143183] [2021-03-24 13:57:23,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:23,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:23,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209104616] [2021-03-24 13:57:23,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:23,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:23,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:23,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:23,210 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:23,210 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 18 transitions, 136 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:23,210 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:23,210 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:23,210 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:23,300 INFO L129 PetriNetUnfolder]: 4/35 cut-off events. [2021-03-24 13:57:23,300 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2021-03-24 13:57:23,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 35 events. 4/35 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 79 event pairs, 1 based on Foata normal form. 1/36 useless extension candidates. Maximal degree in co-relation 182. Up to 14 conditions per place. [2021-03-24 13:57:23,300 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 8 selfloop transitions, 2 changer transitions 9/23 dead transitions. [2021-03-24 13:57:23,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 23 transitions, 219 flow [2021-03-24 13:57:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2021-03-24 13:57:23,301 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.31216931216931215 [2021-03-24 13:57:23,301 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 118 transitions. [2021-03-24 13:57:23,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 118 transitions. [2021-03-24 13:57:23,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:23,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 118 transitions. [2021-03-24 13:57:23,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,302 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,302 INFO L185 Difference]: Start difference. First operand has 64 places, 18 transitions, 136 flow. Second operand 9 states and 118 transitions. [2021-03-24 13:57:23,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 23 transitions, 219 flow [2021-03-24 13:57:23,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 23 transitions, 208 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-03-24 13:57:23,303 INFO L241 Difference]: Finished difference. Result has 67 places, 12 transitions, 72 flow [2021-03-24 13:57:23,303 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=72, PETRI_PLACES=67, PETRI_TRANSITIONS=12} [2021-03-24 13:57:23,303 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 48 predicate places. [2021-03-24 13:57:23,304 INFO L480 AbstractCegarLoop]: Abstraction has has 67 places, 12 transitions, 72 flow [2021-03-24 13:57:23,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:23,304 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:23,304 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:23,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-03-24 13:57:23,304 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:23,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:23,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1794726482, now seen corresponding path program 28 times [2021-03-24 13:57:23,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:23,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611791292] [2021-03-24 13:57:23,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:23,316 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,316 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:23,317 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,317 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:23,320 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:23,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:23,337 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:23,352 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:23,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:23,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611791292] [2021-03-24 13:57:23,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:23,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:23,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713310539] [2021-03-24 13:57:23,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:23,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:23,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:23,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:23,361 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:23,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 12 transitions, 72 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:23,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:23,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:23,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:23,467 INFO L129 PetriNetUnfolder]: 3/33 cut-off events. [2021-03-24 13:57:23,467 INFO L130 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2021-03-24 13:57:23,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 33 events. 3/33 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 1/34 useless extension candidates. Maximal degree in co-relation 148. Up to 9 conditions per place. [2021-03-24 13:57:23,467 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 8 selfloop transitions, 6 changer transitions 2/20 dead transitions. [2021-03-24 13:57:23,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 20 transitions, 166 flow [2021-03-24 13:57:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:23,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2021-03-24 13:57:23,468 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.30687830687830686 [2021-03-24 13:57:23,468 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 116 transitions. [2021-03-24 13:57:23,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 116 transitions. [2021-03-24 13:57:23,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:23,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 116 transitions. [2021-03-24 13:57:23,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,469 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,469 INFO L185 Difference]: Start difference. First operand has 67 places, 12 transitions, 72 flow. Second operand 9 states and 116 transitions. [2021-03-24 13:57:23,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 20 transitions, 166 flow [2021-03-24 13:57:23,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 20 transitions, 132 flow, removed 9 selfloop flow, removed 10 redundant places. [2021-03-24 13:57:23,470 INFO L241 Difference]: Finished difference. Result has 57 places, 14 transitions, 91 flow [2021-03-24 13:57:23,470 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=91, PETRI_PLACES=57, PETRI_TRANSITIONS=14} [2021-03-24 13:57:23,471 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 38 predicate places. [2021-03-24 13:57:23,471 INFO L480 AbstractCegarLoop]: Abstraction has has 57 places, 14 transitions, 91 flow [2021-03-24 13:57:23,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:23,471 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:23,471 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:23,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-03-24 13:57:23,471 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:23,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1776678472, now seen corresponding path program 29 times [2021-03-24 13:57:23,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:23,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886489899] [2021-03-24 13:57:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:23,483 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,483 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:23,484 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,484 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:23,487 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,488 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:23,492 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,498 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,499 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:23,506 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,506 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:23,514 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,514 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:23,521 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:23,522 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:23,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886489899] [2021-03-24 13:57:23,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:23,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:23,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228498553] [2021-03-24 13:57:23,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:23,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:23,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:23,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:23,531 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:23,532 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 14 transitions, 91 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:23,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:23,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:23,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:23,639 INFO L129 PetriNetUnfolder]: 3/43 cut-off events. [2021-03-24 13:57:23,640 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2021-03-24 13:57:23,640 INFO L84 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 43 events. 3/43 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 139 event pairs, 2 based on Foata normal form. 1/44 useless extension candidates. Maximal degree in co-relation 202. Up to 16 conditions per place. [2021-03-24 13:57:23,640 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 11 selfloop transitions, 6 changer transitions 3/24 dead transitions. [2021-03-24 13:57:23,640 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 24 transitions, 210 flow [2021-03-24 13:57:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2021-03-24 13:57:23,648 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.31216931216931215 [2021-03-24 13:57:23,648 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 118 transitions. [2021-03-24 13:57:23,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 118 transitions. [2021-03-24 13:57:23,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:23,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 118 transitions. [2021-03-24 13:57:23,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,649 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,649 INFO L185 Difference]: Start difference. First operand has 57 places, 14 transitions, 91 flow. Second operand 9 states and 118 transitions. [2021-03-24 13:57:23,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 24 transitions, 210 flow [2021-03-24 13:57:23,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 24 transitions, 194 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-03-24 13:57:23,650 INFO L241 Difference]: Finished difference. Result has 64 places, 16 transitions, 124 flow [2021-03-24 13:57:23,650 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=124, PETRI_PLACES=64, PETRI_TRANSITIONS=16} [2021-03-24 13:57:23,650 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 45 predicate places. [2021-03-24 13:57:23,650 INFO L480 AbstractCegarLoop]: Abstraction has has 64 places, 16 transitions, 124 flow [2021-03-24 13:57:23,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:23,650 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:23,651 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:23,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-03-24 13:57:23,651 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:23,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:23,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1626114118, now seen corresponding path program 30 times [2021-03-24 13:57:23,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:23,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424970976] [2021-03-24 13:57:23,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:23,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,658 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:23,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:23,662 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,662 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:23,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,674 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:23,682 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,682 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:23,690 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,690 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:23,702 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:23,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:23,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424970976] [2021-03-24 13:57:23,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:23,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:23,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580729342] [2021-03-24 13:57:23,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:23,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:23,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:23,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:23,711 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:23,711 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 16 transitions, 124 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:23,711 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:23,711 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:23,711 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:23,800 INFO L129 PetriNetUnfolder]: 2/41 cut-off events. [2021-03-24 13:57:23,800 INFO L130 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2021-03-24 13:57:23,800 INFO L84 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 41 events. 2/41 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 136 event pairs, 1 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 219. Up to 11 conditions per place. [2021-03-24 13:57:23,801 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 9 selfloop transitions, 8 changer transitions 3/24 dead transitions. [2021-03-24 13:57:23,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 24 transitions, 241 flow [2021-03-24 13:57:23,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:23,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2021-03-24 13:57:23,801 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.30952380952380953 [2021-03-24 13:57:23,801 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 117 transitions. [2021-03-24 13:57:23,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 117 transitions. [2021-03-24 13:57:23,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:23,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 117 transitions. [2021-03-24 13:57:23,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,802 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,802 INFO L185 Difference]: Start difference. First operand has 64 places, 16 transitions, 124 flow. Second operand 9 states and 117 transitions. [2021-03-24 13:57:23,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 24 transitions, 241 flow [2021-03-24 13:57:23,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 24 transitions, 220 flow, removed 7 selfloop flow, removed 5 redundant places. [2021-03-24 13:57:23,803 INFO L241 Difference]: Finished difference. Result has 69 places, 17 transitions, 154 flow [2021-03-24 13:57:23,803 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=154, PETRI_PLACES=69, PETRI_TRANSITIONS=17} [2021-03-24 13:57:23,803 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 50 predicate places. [2021-03-24 13:57:23,803 INFO L480 AbstractCegarLoop]: Abstraction has has 69 places, 17 transitions, 154 flow [2021-03-24 13:57:23,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:23,803 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:23,803 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:23,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-03-24 13:57:23,803 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:23,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:23,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1802178928, now seen corresponding path program 31 times [2021-03-24 13:57:23,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:23,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772780440] [2021-03-24 13:57:23,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:23,812 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,812 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:23,812 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,813 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:23,816 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,816 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:23,821 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:23,835 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,836 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,843 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,843 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:23,852 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:23,852 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:23,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772780440] [2021-03-24 13:57:23,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:23,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:23,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842190610] [2021-03-24 13:57:23,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:23,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:23,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:23,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:23,861 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:23,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 17 transitions, 154 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:23,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:23,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:23,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:23,968 INFO L129 PetriNetUnfolder]: 1/38 cut-off events. [2021-03-24 13:57:23,968 INFO L130 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2021-03-24 13:57:23,968 INFO L84 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 38 events. 1/38 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 118 event pairs, 1 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 209. Up to 11 conditions per place. [2021-03-24 13:57:23,968 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 10 selfloop transitions, 8 changer transitions 2/24 dead transitions. [2021-03-24 13:57:23,968 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 24 transitions, 260 flow [2021-03-24 13:57:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:23,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2021-03-24 13:57:23,969 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.30952380952380953 [2021-03-24 13:57:23,969 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 117 transitions. [2021-03-24 13:57:23,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 117 transitions. [2021-03-24 13:57:23,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:23,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 117 transitions. [2021-03-24 13:57:23,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,970 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:23,970 INFO L185 Difference]: Start difference. First operand has 69 places, 17 transitions, 154 flow. Second operand 9 states and 117 transitions. [2021-03-24 13:57:23,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 24 transitions, 260 flow [2021-03-24 13:57:23,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 24 transitions, 217 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-03-24 13:57:23,971 INFO L241 Difference]: Finished difference. Result has 71 places, 19 transitions, 177 flow [2021-03-24 13:57:23,972 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=177, PETRI_PLACES=71, PETRI_TRANSITIONS=19} [2021-03-24 13:57:23,972 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 52 predicate places. [2021-03-24 13:57:23,972 INFO L480 AbstractCegarLoop]: Abstraction has has 71 places, 19 transitions, 177 flow [2021-03-24 13:57:23,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:23,972 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:23,972 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:23,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-03-24 13:57:23,972 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:23,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1804557512, now seen corresponding path program 32 times [2021-03-24 13:57:23,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:23,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960653409] [2021-03-24 13:57:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:23,983 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,984 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:23,984 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,984 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:23,988 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:23,992 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:23,998 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:23,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:24,003 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,004 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:24,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,011 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:24,019 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:24,019 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:24,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960653409] [2021-03-24 13:57:24,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:24,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:24,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158146624] [2021-03-24 13:57:24,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:24,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:24,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:24,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:24,029 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:24,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 19 transitions, 177 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:24,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:24,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:24,029 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:24,134 INFO L129 PetriNetUnfolder]: 1/35 cut-off events. [2021-03-24 13:57:24,134 INFO L130 PetriNetUnfolder]: For 86/86 co-relation queries the response was YES. [2021-03-24 13:57:24,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 35 events. 1/35 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 97 event pairs, 1 based on Foata normal form. 1/36 useless extension candidates. Maximal degree in co-relation 199. Up to 13 conditions per place. [2021-03-24 13:57:24,135 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 7 selfloop transitions, 6 changer transitions 6/23 dead transitions. [2021-03-24 13:57:24,135 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 23 transitions, 254 flow [2021-03-24 13:57:24,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:24,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2021-03-24 13:57:24,136 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.30158730158730157 [2021-03-24 13:57:24,136 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 114 transitions. [2021-03-24 13:57:24,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 114 transitions. [2021-03-24 13:57:24,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:24,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 114 transitions. [2021-03-24 13:57:24,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:24,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:24,136 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:24,137 INFO L185 Difference]: Start difference. First operand has 71 places, 19 transitions, 177 flow. Second operand 9 states and 114 transitions. [2021-03-24 13:57:24,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 23 transitions, 254 flow [2021-03-24 13:57:24,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 23 transitions, 238 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-03-24 13:57:24,138 INFO L241 Difference]: Finished difference. Result has 75 places, 17 transitions, 148 flow [2021-03-24 13:57:24,138 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=148, PETRI_PLACES=75, PETRI_TRANSITIONS=17} [2021-03-24 13:57:24,138 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 56 predicate places. [2021-03-24 13:57:24,138 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 17 transitions, 148 flow [2021-03-24 13:57:24,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:24,138 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:24,139 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:24,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-03-24 13:57:24,139 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:24,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:24,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1792347898, now seen corresponding path program 33 times [2021-03-24 13:57:24,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:24,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049187537] [2021-03-24 13:57:24,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:24,150 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,151 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:24,151 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,151 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:24,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,155 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:24,160 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,160 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:24,166 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:24,174 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,174 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:24,185 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,186 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:24,194 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:24,195 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:24,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049187537] [2021-03-24 13:57:24,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:24,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:24,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636725776] [2021-03-24 13:57:24,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:24,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:24,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:24,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:24,205 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:24,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 17 transitions, 148 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:24,205 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:24,205 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:24,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:24,309 INFO L129 PetriNetUnfolder]: 1/28 cut-off events. [2021-03-24 13:57:24,309 INFO L130 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2021-03-24 13:57:24,309 INFO L84 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 28 events. 1/28 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 55 event pairs, 1 based on Foata normal form. 1/29 useless extension candidates. Maximal degree in co-relation 162. Up to 11 conditions per place. [2021-03-24 13:57:24,310 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 5 selfloop transitions, 3 changer transitions 7/19 dead transitions. [2021-03-24 13:57:24,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 19 transitions, 199 flow [2021-03-24 13:57:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2021-03-24 13:57:24,311 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.30158730158730157 [2021-03-24 13:57:24,311 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 114 transitions. [2021-03-24 13:57:24,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 114 transitions. [2021-03-24 13:57:24,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:24,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 114 transitions. [2021-03-24 13:57:24,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:24,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:24,312 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:24,312 INFO L185 Difference]: Start difference. First operand has 75 places, 17 transitions, 148 flow. Second operand 9 states and 114 transitions. [2021-03-24 13:57:24,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 19 transitions, 199 flow [2021-03-24 13:57:24,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 19 transitions, 172 flow, removed 7 selfloop flow, removed 9 redundant places. [2021-03-24 13:57:24,313 INFO L241 Difference]: Finished difference. Result has 70 places, 12 transitions, 77 flow [2021-03-24 13:57:24,313 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=77, PETRI_PLACES=70, PETRI_TRANSITIONS=12} [2021-03-24 13:57:24,313 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 51 predicate places. [2021-03-24 13:57:24,313 INFO L480 AbstractCegarLoop]: Abstraction has has 70 places, 12 transitions, 77 flow [2021-03-24 13:57:24,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:24,313 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:24,313 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:24,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-03-24 13:57:24,314 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:24,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:24,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1600613662, now seen corresponding path program 34 times [2021-03-24 13:57:24,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:24,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564455020] [2021-03-24 13:57:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:24,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:24,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:24,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:24,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:24,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:24,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:24,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 13:57:24,372 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:24,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:24,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564455020] [2021-03-24 13:57:24,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:24,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:24,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654146911] [2021-03-24 13:57:24,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:24,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:24,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:24,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:24,383 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:24,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 12 transitions, 77 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:24,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:24,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:24,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:24,484 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-24 13:57:24,485 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-03-24 13:57:24,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 17 events. 0/17 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 1/18 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 13:57:24,485 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 2 selfloop transitions, 6 changer transitions 2/14 dead transitions. [2021-03-24 13:57:24,485 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 14 transitions, 111 flow [2021-03-24 13:57:24,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2021-03-24 13:57:24,486 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.291005291005291 [2021-03-24 13:57:24,486 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 110 transitions. [2021-03-24 13:57:24,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 110 transitions. [2021-03-24 13:57:24,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:24,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 110 transitions. [2021-03-24 13:57:24,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:24,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:24,487 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:24,487 INFO L185 Difference]: Start difference. First operand has 70 places, 12 transitions, 77 flow. Second operand 9 states and 110 transitions. [2021-03-24 13:57:24,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 14 transitions, 111 flow [2021-03-24 13:57:24,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 14 transitions, 88 flow, removed 6 selfloop flow, removed 11 redundant places. [2021-03-24 13:57:24,487 INFO L241 Difference]: Finished difference. Result has 60 places, 12 transitions, 71 flow [2021-03-24 13:57:24,487 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=71, PETRI_PLACES=60, PETRI_TRANSITIONS=12} [2021-03-24 13:57:24,488 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 41 predicate places. [2021-03-24 13:57:24,488 INFO L480 AbstractCegarLoop]: Abstraction has has 60 places, 12 transitions, 71 flow [2021-03-24 13:57:24,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:24,488 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:24,488 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:24,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-03-24 13:57:24,488 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1610444692, now seen corresponding path program 35 times [2021-03-24 13:57:24,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:24,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882045174] [2021-03-24 13:57:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:24,494 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,494 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:24,494 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,495 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:24,499 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,499 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:24,505 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,505 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:24,513 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:24,523 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,524 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:24,532 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:24,533 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 13:57:24,542 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 13:57:24,542 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:24,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882045174] [2021-03-24 13:57:24,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:24,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-24 13:57:24,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753260336] [2021-03-24 13:57:24,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-24 13:57:24,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:24,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-24 13:57:24,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-24 13:57:24,553 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2021-03-24 13:57:24,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 12 transitions, 71 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:24,553 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:24,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2021-03-24 13:57:24,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:24,649 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-24 13:57:24,650 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-03-24 13:57:24,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 14 events. 0/14 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 1/15 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 13:57:24,650 INFO L132 encePairwiseOnDemand]: 34/42 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-03-24 13:57:24,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 13 transitions, 102 flow [2021-03-24 13:57:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 13:57:24,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 13:57:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2021-03-24 13:57:24,650 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.28835978835978837 [2021-03-24 13:57:24,650 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 109 transitions. [2021-03-24 13:57:24,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 109 transitions. [2021-03-24 13:57:24,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:24,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 109 transitions. [2021-03-24 13:57:24,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:24,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:24,651 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:24,651 INFO L185 Difference]: Start difference. First operand has 60 places, 12 transitions, 71 flow. Second operand 9 states and 109 transitions. [2021-03-24 13:57:24,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 13 transitions, 102 flow [2021-03-24 13:57:24,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 13 transitions, 90 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-24 13:57:24,652 INFO L241 Difference]: Finished difference. Result has 60 places, 0 transitions, 0 flow [2021-03-24 13:57:24,652 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=60, PETRI_TRANSITIONS=0} [2021-03-24 13:57:24,652 INFO L343 CegarLoopForPetriNet]: 19 programPoint places, 41 predicate places. [2021-03-24 13:57:24,652 INFO L480 AbstractCegarLoop]: Abstraction has has 60 places, 0 transitions, 0 flow [2021-03-24 13:57:24,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2021-03-24 13:57:24,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-03-24 13:57:24,655 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 01:57:24 BasicIcfg [2021-03-24 13:57:24,656 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 13:57:24,656 INFO L168 Benchmark]: Toolchain (without parser) took 12782.51 ms. Allocated memory was 255.9 MB in the beginning and 432.0 MB in the end (delta: 176.2 MB). Free memory was 236.7 MB in the beginning and 345.6 MB in the end (delta: -108.9 MB). Peak memory consumption was 67.5 MB. Max. memory is 16.0 GB. [2021-03-24 13:57:24,656 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.7 MB in the end (delta: 154.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:57:24,656 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.28 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 13:57:24,656 INFO L168 Benchmark]: Boogie Preprocessor took 13.83 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.3 MB in the end (delta: 841.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:57:24,656 INFO L168 Benchmark]: RCFGBuilder took 182.76 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 239.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.0 GB. [2021-03-24 13:57:24,656 INFO L168 Benchmark]: TraceAbstraction took 12553.84 ms. Allocated memory was 255.9 MB in the beginning and 432.0 MB in the end (delta: 176.2 MB). Free memory was 239.5 MB in the beginning and 345.6 MB in the end (delta: -106.2 MB). Peak memory consumption was 69.9 MB. Max. memory is 16.0 GB. [2021-03-24 13:57:24,657 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 0.19 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.7 MB in the end (delta: 154.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.28 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.83 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.3 MB in the end (delta: 841.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 182.76 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 239.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 12553.84 ms. Allocated memory was 255.9 MB in the beginning and 432.0 MB in the end (delta: 176.2 MB). Free memory was 239.5 MB in the beginning and 345.6 MB in the end (delta: -106.2 MB). Peak memory consumption was 69.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 294.2ms, 27 PlacesBefore, 19 PlacesAfterwards, 24 TransitionsBefore, 14 TransitionsAfterwards, 198 CoEnabledTransitionPairs, 4 FixpointIterations, 3 TrivialSequentialCompositions, 7 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 2 ChoiceCompositions, 14 TotalNumberOfCompositions, 91 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 91, positive: 91, positive conditional: 0, positive unconditional: 91, 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: 77, positive: 77, positive conditional: 0, positive unconditional: 77, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 77, positive: 77, positive conditional: 0, positive unconditional: 77, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 91, positive: 14, positive conditional: 0, positive unconditional: 14, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 77, unknown conditional: 0, unknown unconditional: 77] , Statistics on independence cache: Total cache size (in pairs): 8, Positive cache size: 8, Positive conditional cache size: 0, Positive unconditional cache size: 8, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 69]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 12485.2ms, OverallIterations: 66, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 7665.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 349.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 793 SDtfs, 1447 SDslu, 1887 SDs, 0 SdLazy, 3040 SolverSat, 120 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1515.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 814 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 748 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 7022.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=428occurred in iteration=41, InterpolantAutomatonStates: 545, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 46.2ms SsaConstructionTime, 162.4ms SatisfiabilityAnalysisTime, 3898.1ms InterpolantComputationTime, 755 NumberOfCodeBlocks, 755 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 689 ConstructedInterpolants, 0 QuantifiedInterpolants, 5449 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 66 InterpolantComputations, 66 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...