/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 16:14:00,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 16:14:00,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 16:14:00,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 16:14:00,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 16:14:00,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 16:14:00,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 16:14:00,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 16:14:00,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 16:14:00,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 16:14:00,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 16:14:00,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 16:14:00,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 16:14:00,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 16:14:00,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 16:14:00,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 16:14:00,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 16:14:00,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 16:14:00,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 16:14:00,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 16:14:00,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 16:14:00,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 16:14:00,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 16:14:00,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 16:14:00,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 16:14:00,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-10 16:14:00,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-10 16:14:00,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-10 16:14:00,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-10 16:14:00,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-10 16:14:00,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-10 16:14:00,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-10 16:14:00,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-10 16:14:00,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-10 16:14:00,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-10 16:14:00,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-10 16:14:00,202 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-06-10 16:14:00,235 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 16:14:00,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 16:14:00,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 16:14:00,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 16:14:00,239 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 16:14:00,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 16:14:00,239 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 16:14:00,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 16:14:00,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 16:14:00,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 16:14:00,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 16:14:00,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 16:14:00,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 16:14:00,241 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 16:14:00,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 16:14:00,241 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 16:14:00,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 16:14:00,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 16:14:00,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 16:14:00,242 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 16:14:00,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 16:14:00,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 16:14:00,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 16:14:00,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 16:14:00,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 16:14:00,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 16:14:00,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 16:14:00,243 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 16:14:00,244 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 16:14:00,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 16:14:00,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 16:14:00,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 16:14:00,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 16:14:00,579 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 16:14:00,580 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 16:14:00,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-3.wvr.bpl [2021-06-10 16:14:00,592 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-3.wvr.bpl' [2021-06-10 16:14:00,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 16:14:00,642 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 16:14:00,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 16:14:00,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 16:14:00,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 16:14:00,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:14:00" (1/1) ... [2021-06-10 16:14:00,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:14:00" (1/1) ... [2021-06-10 16:14:00,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 16:14:00,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 16:14:00,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 16:14:00,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 16:14:00,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:14:00" (1/1) ... [2021-06-10 16:14:00,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:14:00" (1/1) ... [2021-06-10 16:14:00,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:14:00" (1/1) ... [2021-06-10 16:14:00,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:14:00" (1/1) ... [2021-06-10 16:14:00,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:14:00" (1/1) ... [2021-06-10 16:14:00,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:14:00" (1/1) ... [2021-06-10 16:14:00,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:14:00" (1/1) ... [2021-06-10 16:14:00,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 16:14:00,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 16:14:00,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 16:14:00,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 16:14:00,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:14:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 16:14:00,744 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-10 16:14:00,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-10 16:14:00,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-10 16:14:00,745 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-10 16:14:00,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-10 16:14:00,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-10 16:14:00,746 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 16:14:00,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 16:14:00,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 16:14:00,746 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-10 16:14:00,746 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-10 16:14:00,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-10 16:14:00,747 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-10 16:14:00,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 16:14:00,926 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 16:14:00,928 INFO L202 PluginConnector]: Adding new model bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 04:14:00 BoogieIcfgContainer [2021-06-10 16:14:00,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 16:14:00,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 16:14:00,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 16:14:00,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 16:14:00,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:14:00" (1/2) ... [2021-06-10 16:14:00,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f86c58 and model type bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 04:14:00, skipping insertion in model container [2021-06-10 16:14:00,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 04:14:00" (2/2) ... [2021-06-10 16:14:00,934 INFO L111 eAbstractionObserver]: Analyzing ICFG bakery-3.wvr.bpl [2021-06-10 16:14:00,939 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 16:14:00,942 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 16:14:00,943 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 16:14:00,989 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-10 16:14:01,004 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-10 16:14:01,021 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 16:14:01,021 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 16:14:01,022 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 16:14:01,022 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 16:14:01,022 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 16:14:01,022 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 16:14:01,022 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 16:14:01,022 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 16:14:01,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 63 places, 53 transitions, 130 flow [2021-06-10 16:14:01,068 INFO L129 PetriNetUnfolder]: 0/50 cut-off events. [2021-06-10 16:14:01,069 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-10 16:14:01,070 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 16:14:01,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 53 transitions, 130 flow [2021-06-10 16:14:01,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 48 transitions, 114 flow [2021-06-10 16:14:01,101 INFO L129 PetriNetUnfolder]: 0/47 cut-off events. [2021-06-10 16:14:01,102 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-10 16:14:01,102 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:01,103 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:01,103 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:01,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:01,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2013229232, now seen corresponding path program 1 times [2021-06-10 16:14:01,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:01,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453147752] [2021-06-10 16:14:01,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:01,304 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:01,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:01,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:01,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:01,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:01,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:01,340 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:01,341 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:01,374 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:01,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:01,409 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:01,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:01,440 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-06-10 16:14:01,443 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:01,463 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:01,464 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:01,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453147752] [2021-06-10 16:14:01,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:01,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:14:01,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190401595] [2021-06-10 16:14:01,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:14:01,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:14:01,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:14:01,504 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 53 [2021-06-10 16:14:01,511 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 114 flow. Second operand has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:01,512 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:01,512 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 53 [2021-06-10 16:14:01,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:01,865 INFO L129 PetriNetUnfolder]: 29/215 cut-off events. [2021-06-10 16:14:01,866 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-06-10 16:14:01,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 215 events. 29/215 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1169 event pairs, 3 based on Foata normal form. 1/215 useless extension candidates. Maximal degree in co-relation 291. Up to 28 conditions per place. [2021-06-10 16:14:01,876 INFO L132 encePairwiseOnDemand]: 45/53 looper letters, 21 selfloop transitions, 15 changer transitions 2/78 dead transitions. [2021-06-10 16:14:01,877 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 250 flow [2021-06-10 16:14:01,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-10 16:14:01,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-06-10 16:14:01,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 523 transitions. [2021-06-10 16:14:01,889 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8970840480274442 [2021-06-10 16:14:01,889 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 523 transitions. [2021-06-10 16:14:01,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 523 transitions. [2021-06-10 16:14:01,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:01,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 523 transitions. [2021-06-10 16:14:01,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 47.54545454545455) internal successors, (523), 11 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:01,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:01,905 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:01,907 INFO L185 Difference]: Start difference. First operand has 58 places, 48 transitions, 114 flow. Second operand 11 states and 523 transitions. [2021-06-10 16:14:01,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 250 flow [2021-06-10 16:14:01,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 238 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-06-10 16:14:01,914 INFO L241 Difference]: Finished difference. Result has 66 places, 64 transitions, 194 flow [2021-06-10 16:14:01,916 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=194, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2021-06-10 16:14:01,917 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 8 predicate places. [2021-06-10 16:14:01,917 INFO L480 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 194 flow [2021-06-10 16:14:01,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:01,917 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:01,918 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:01,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 16:14:01,918 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:01,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:01,919 INFO L82 PathProgramCache]: Analyzing trace with hash -99645260, now seen corresponding path program 2 times [2021-06-10 16:14:01,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:01,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264543566] [2021-06-10 16:14:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:01,987 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:01,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:14:01,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:01,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:14:01,997 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:01,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:14:01,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:02,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 16:14:02,008 INFO L142 QuantifierPusher]: treesize reduction 7, result has 63.2 percent of original size [2021-06-10 16:14:02,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:14:02,018 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:02,019 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:02,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:02,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:14:02,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:02,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:02,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264543566] [2021-06-10 16:14:02,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:02,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-10 16:14:02,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840013757] [2021-06-10 16:14:02,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-10 16:14:02,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:02,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-10 16:14:02,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-10 16:14:02,039 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:14:02,040 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 194 flow. Second operand has 7 states, 7 states have (on average 35.714285714285715) internal successors, (250), 7 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:02,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:02,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:14:02,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:02,504 INFO L129 PetriNetUnfolder]: 1085/2823 cut-off events. [2021-06-10 16:14:02,504 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-06-10 16:14:02,516 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5099 conditions, 2823 events. 1085/2823 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 22758 event pairs, 270 based on Foata normal form. 21/2740 useless extension candidates. Maximal degree in co-relation 5077. Up to 1157 conditions per place. [2021-06-10 16:14:02,535 INFO L132 encePairwiseOnDemand]: 43/53 looper letters, 59 selfloop transitions, 22 changer transitions 0/126 dead transitions. [2021-06-10 16:14:02,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 126 transitions, 480 flow [2021-06-10 16:14:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 16:14:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 16:14:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 346 transitions. [2021-06-10 16:14:02,543 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8160377358490566 [2021-06-10 16:14:02,543 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 346 transitions. [2021-06-10 16:14:02,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 346 transitions. [2021-06-10 16:14:02,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:02,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 346 transitions. [2021-06-10 16:14:02,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 43.25) internal successors, (346), 8 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:02,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:02,548 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:02,548 INFO L185 Difference]: Start difference. First operand has 66 places, 64 transitions, 194 flow. Second operand 8 states and 346 transitions. [2021-06-10 16:14:02,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 126 transitions, 480 flow [2021-06-10 16:14:02,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 126 transitions, 478 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-06-10 16:14:02,561 INFO L241 Difference]: Finished difference. Result has 75 places, 86 transitions, 334 flow [2021-06-10 16:14:02,561 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=334, PETRI_PLACES=75, PETRI_TRANSITIONS=86} [2021-06-10 16:14:02,561 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 17 predicate places. [2021-06-10 16:14:02,562 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 86 transitions, 334 flow [2021-06-10 16:14:02,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 35.714285714285715) internal successors, (250), 7 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:02,562 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:02,562 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:02,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 16:14:02,563 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:02,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:02,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1878523510, now seen corresponding path program 3 times [2021-06-10 16:14:02,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:02,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479816444] [2021-06-10 16:14:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:02,627 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:02,627 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:02,628 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:02,628 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:02,631 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:02,632 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:02,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479816444] [2021-06-10 16:14:02,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:02,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 16:14:02,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937382902] [2021-06-10 16:14:02,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 16:14:02,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:02,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 16:14:02,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 16:14:02,635 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 53 [2021-06-10 16:14:02,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 86 transitions, 334 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:02,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:02,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 53 [2021-06-10 16:14:02,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:02,711 INFO L129 PetriNetUnfolder]: 88/612 cut-off events. [2021-06-10 16:14:02,712 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2021-06-10 16:14:02,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 612 events. 88/612 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 4479 event pairs, 21 based on Foata normal form. 19/619 useless extension candidates. Maximal degree in co-relation 1013. Up to 76 conditions per place. [2021-06-10 16:14:02,717 INFO L132 encePairwiseOnDemand]: 49/53 looper letters, 3 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2021-06-10 16:14:02,717 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 86 transitions, 344 flow [2021-06-10 16:14:02,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 16:14:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 16:14:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2021-06-10 16:14:02,718 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9308176100628931 [2021-06-10 16:14:02,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2021-06-10 16:14:02,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2021-06-10 16:14:02,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:02,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2021-06-10 16:14:02,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:02,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:02,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:02,721 INFO L185 Difference]: Start difference. First operand has 75 places, 86 transitions, 334 flow. Second operand 3 states and 148 transitions. [2021-06-10 16:14:02,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 86 transitions, 344 flow [2021-06-10 16:14:02,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 344 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-06-10 16:14:02,728 INFO L241 Difference]: Finished difference. Result has 78 places, 86 transitions, 344 flow [2021-06-10 16:14:02,728 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=78, PETRI_TRANSITIONS=86} [2021-06-10 16:14:02,729 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2021-06-10 16:14:02,729 INFO L480 AbstractCegarLoop]: Abstraction has has 78 places, 86 transitions, 344 flow [2021-06-10 16:14:02,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:02,729 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:02,729 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:02,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 16:14:02,730 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:02,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:02,731 INFO L82 PathProgramCache]: Analyzing trace with hash 157509754, now seen corresponding path program 4 times [2021-06-10 16:14:02,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:02,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331605104] [2021-06-10 16:14:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:02,765 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:02,766 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:02,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:02,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:02,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:02,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:02,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331605104] [2021-06-10 16:14:02,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:02,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 16:14:02,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026633311] [2021-06-10 16:14:02,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 16:14:02,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:02,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 16:14:02,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 16:14:02,775 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 53 [2021-06-10 16:14:02,775 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 86 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:02,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:02,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 53 [2021-06-10 16:14:02,775 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:02,843 INFO L129 PetriNetUnfolder]: 117/743 cut-off events. [2021-06-10 16:14:02,844 INFO L130 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2021-06-10 16:14:02,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1349 conditions, 743 events. 117/743 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5715 event pairs, 39 based on Foata normal form. 16/737 useless extension candidates. Maximal degree in co-relation 1272. Up to 81 conditions per place. [2021-06-10 16:14:02,851 INFO L132 encePairwiseOnDemand]: 49/53 looper letters, 3 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2021-06-10 16:14:02,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 86 transitions, 354 flow [2021-06-10 16:14:02,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 16:14:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 16:14:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2021-06-10 16:14:02,852 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9308176100628931 [2021-06-10 16:14:02,853 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2021-06-10 16:14:02,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2021-06-10 16:14:02,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:02,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2021-06-10 16:14:02,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:02,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:02,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:02,854 INFO L185 Difference]: Start difference. First operand has 78 places, 86 transitions, 344 flow. Second operand 3 states and 148 transitions. [2021-06-10 16:14:02,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 86 transitions, 354 flow [2021-06-10 16:14:02,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 86 transitions, 350 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 16:14:02,862 INFO L241 Difference]: Finished difference. Result has 79 places, 86 transitions, 350 flow [2021-06-10 16:14:02,862 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=79, PETRI_TRANSITIONS=86} [2021-06-10 16:14:02,863 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 21 predicate places. [2021-06-10 16:14:02,866 INFO L480 AbstractCegarLoop]: Abstraction has has 79 places, 86 transitions, 350 flow [2021-06-10 16:14:02,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:02,866 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:02,866 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:02,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-10 16:14:02,867 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:02,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1887522296, now seen corresponding path program 5 times [2021-06-10 16:14:02,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:02,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673905592] [2021-06-10 16:14:02,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:02,960 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:02,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:02,968 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:02,968 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:02,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:02,980 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:02,988 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:02,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:02,998 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:02,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:03,010 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:03,011 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:03,028 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-06-10 16:14:03,029 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:03,040 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:03,041 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:03,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673905592] [2021-06-10 16:14:03,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:03,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:14:03,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621646295] [2021-06-10 16:14:03,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:14:03,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:03,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:14:03,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:14:03,045 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 53 [2021-06-10 16:14:03,046 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 86 transitions, 350 flow. Second operand has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:03,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:03,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 53 [2021-06-10 16:14:03,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:03,316 INFO L129 PetriNetUnfolder]: 173/1053 cut-off events. [2021-06-10 16:14:03,316 INFO L130 PetriNetUnfolder]: For 192/205 co-relation queries the response was YES. [2021-06-10 16:14:03,321 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2141 conditions, 1053 events. 173/1053 cut-off events. For 192/205 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8767 event pairs, 57 based on Foata normal form. 11/1039 useless extension candidates. Maximal degree in co-relation 1991. Up to 121 conditions per place. [2021-06-10 16:14:03,326 INFO L132 encePairwiseOnDemand]: 45/53 looper letters, 30 selfloop transitions, 22 changer transitions 2/116 dead transitions. [2021-06-10 16:14:03,326 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 116 transitions, 577 flow [2021-06-10 16:14:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-10 16:14:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-06-10 16:14:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 523 transitions. [2021-06-10 16:14:03,328 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8970840480274442 [2021-06-10 16:14:03,328 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 523 transitions. [2021-06-10 16:14:03,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 523 transitions. [2021-06-10 16:14:03,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:03,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 523 transitions. [2021-06-10 16:14:03,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 47.54545454545455) internal successors, (523), 11 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:03,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:03,332 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:03,333 INFO L185 Difference]: Start difference. First operand has 79 places, 86 transitions, 350 flow. Second operand 11 states and 523 transitions. [2021-06-10 16:14:03,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 116 transitions, 577 flow [2021-06-10 16:14:03,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 116 transitions, 573 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 16:14:03,338 INFO L241 Difference]: Finished difference. Result has 92 places, 101 transitions, 502 flow [2021-06-10 16:14:03,338 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=502, PETRI_PLACES=92, PETRI_TRANSITIONS=101} [2021-06-10 16:14:03,338 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 34 predicate places. [2021-06-10 16:14:03,338 INFO L480 AbstractCegarLoop]: Abstraction has has 92 places, 101 transitions, 502 flow [2021-06-10 16:14:03,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:03,339 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:03,339 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:03,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-10 16:14:03,340 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:03,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:03,340 INFO L82 PathProgramCache]: Analyzing trace with hash -822706686, now seen corresponding path program 6 times [2021-06-10 16:14:03,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:03,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494164863] [2021-06-10 16:14:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:03,434 INFO L142 QuantifierPusher]: treesize reduction 21, result has 54.3 percent of original size [2021-06-10 16:14:03,435 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 16:14:03,455 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:03,457 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:03,462 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:03,463 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 16:14:03,467 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:03,468 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 16:14:03,475 INFO L142 QuantifierPusher]: treesize reduction 22, result has 37.1 percent of original size [2021-06-10 16:14:03,476 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:14:03,490 INFO L142 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-06-10 16:14:03,491 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:03,500 INFO L142 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size [2021-06-10 16:14:03,500 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:14:03,513 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:03,514 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:03,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494164863] [2021-06-10 16:14:03,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:03,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:14:03,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328724020] [2021-06-10 16:14:03,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:14:03,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:03,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:14:03,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:14:03,518 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:14:03,519 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 101 transitions, 502 flow. Second operand has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:03,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:03,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:14:03,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:04,116 INFO L129 PetriNetUnfolder]: 1824/4799 cut-off events. [2021-06-10 16:14:04,117 INFO L130 PetriNetUnfolder]: For 2209/2328 co-relation queries the response was YES. [2021-06-10 16:14:04,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11740 conditions, 4799 events. 1824/4799 cut-off events. For 2209/2328 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 42831 event pairs, 494 based on Foata normal form. 46/4665 useless extension candidates. Maximal degree in co-relation 11684. Up to 1263 conditions per place. [2021-06-10 16:14:04,163 INFO L132 encePairwiseOnDemand]: 44/53 looper letters, 87 selfloop transitions, 24 changer transitions 0/171 dead transitions. [2021-06-10 16:14:04,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 171 transitions, 969 flow [2021-06-10 16:14:04,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 16:14:04,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 16:14:04,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 338 transitions. [2021-06-10 16:14:04,165 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7971698113207547 [2021-06-10 16:14:04,165 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 338 transitions. [2021-06-10 16:14:04,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 338 transitions. [2021-06-10 16:14:04,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:04,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 338 transitions. [2021-06-10 16:14:04,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 42.25) internal successors, (338), 8 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:04,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:04,167 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:04,167 INFO L185 Difference]: Start difference. First operand has 92 places, 101 transitions, 502 flow. Second operand 8 states and 338 transitions. [2021-06-10 16:14:04,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 171 transitions, 969 flow [2021-06-10 16:14:04,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 171 transitions, 955 flow, removed 7 selfloop flow, removed 1 redundant places. [2021-06-10 16:14:04,191 INFO L241 Difference]: Finished difference. Result has 101 places, 116 transitions, 649 flow [2021-06-10 16:14:04,191 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=649, PETRI_PLACES=101, PETRI_TRANSITIONS=116} [2021-06-10 16:14:04,192 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 43 predicate places. [2021-06-10 16:14:04,192 INFO L480 AbstractCegarLoop]: Abstraction has has 101 places, 116 transitions, 649 flow [2021-06-10 16:14:04,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:04,192 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:04,192 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:04,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-10 16:14:04,192 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:04,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:04,193 INFO L82 PathProgramCache]: Analyzing trace with hash -563361684, now seen corresponding path program 7 times [2021-06-10 16:14:04,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:04,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715086219] [2021-06-10 16:14:04,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:04,219 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:04,220 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:04,220 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:04,220 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:04,223 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:04,223 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:04,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715086219] [2021-06-10 16:14:04,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:04,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 16:14:04,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502160072] [2021-06-10 16:14:04,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 16:14:04,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:04,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 16:14:04,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 16:14:04,225 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 53 [2021-06-10 16:14:04,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 116 transitions, 649 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:04,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:04,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 53 [2021-06-10 16:14:04,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:04,375 INFO L129 PetriNetUnfolder]: 331/1764 cut-off events. [2021-06-10 16:14:04,376 INFO L130 PetriNetUnfolder]: For 789/837 co-relation queries the response was YES. [2021-06-10 16:14:04,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4210 conditions, 1764 events. 331/1764 cut-off events. For 789/837 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 16408 event pairs, 69 based on Foata normal form. 42/1750 useless extension candidates. Maximal degree in co-relation 4044. Up to 210 conditions per place. [2021-06-10 16:14:04,393 INFO L132 encePairwiseOnDemand]: 49/53 looper letters, 3 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2021-06-10 16:14:04,393 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 116 transitions, 659 flow [2021-06-10 16:14:04,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 16:14:04,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 16:14:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2021-06-10 16:14:04,394 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9308176100628931 [2021-06-10 16:14:04,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2021-06-10 16:14:04,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2021-06-10 16:14:04,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:04,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2021-06-10 16:14:04,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:04,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:04,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:04,397 INFO L185 Difference]: Start difference. First operand has 101 places, 116 transitions, 649 flow. Second operand 3 states and 148 transitions. [2021-06-10 16:14:04,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 116 transitions, 659 flow [2021-06-10 16:14:04,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 116 transitions, 658 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-10 16:14:04,409 INFO L241 Difference]: Finished difference. Result has 103 places, 116 transitions, 658 flow [2021-06-10 16:14:04,409 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=658, PETRI_PLACES=103, PETRI_TRANSITIONS=116} [2021-06-10 16:14:04,410 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 45 predicate places. [2021-06-10 16:14:04,410 INFO L480 AbstractCegarLoop]: Abstraction has has 103 places, 116 transitions, 658 flow [2021-06-10 16:14:04,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:04,410 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:04,410 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:04,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-10 16:14:04,410 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:04,411 INFO L82 PathProgramCache]: Analyzing trace with hash 233591496, now seen corresponding path program 8 times [2021-06-10 16:14:04,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:04,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380453946] [2021-06-10 16:14:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:04,494 INFO L142 QuantifierPusher]: treesize reduction 21, result has 54.3 percent of original size [2021-06-10 16:14:04,495 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 16:14:04,513 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:04,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:04,519 INFO L142 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-06-10 16:14:04,520 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:04,520 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:04,521 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:04,528 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:04,529 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:14:04,539 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:04,540 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:04,542 INFO L142 QuantifierPusher]: treesize reduction 22, result has 37.1 percent of original size [2021-06-10 16:14:04,543 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:14:04,547 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:04,550 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:04,558 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:04,560 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:04,569 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:04,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:04,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380453946] [2021-06-10 16:14:04,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:04,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 16:14:04,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770986715] [2021-06-10 16:14:04,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 16:14:04,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:04,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 16:14:04,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-10 16:14:04,573 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:14:04,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 116 transitions, 658 flow. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:04,573 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:04,573 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:14:04,573 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:05,372 INFO L129 PetriNetUnfolder]: 2580/6624 cut-off events. [2021-06-10 16:14:05,372 INFO L130 PetriNetUnfolder]: For 5652/5802 co-relation queries the response was YES. [2021-06-10 16:14:05,419 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19125 conditions, 6624 events. 2580/6624 cut-off events. For 5652/5802 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 61958 event pairs, 766 based on Foata normal form. 64/6356 useless extension candidates. Maximal degree in co-relation 18854. Up to 2760 conditions per place. [2021-06-10 16:14:05,460 INFO L132 encePairwiseOnDemand]: 38/53 looper letters, 101 selfloop transitions, 37 changer transitions 0/198 dead transitions. [2021-06-10 16:14:05,460 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 198 transitions, 1262 flow [2021-06-10 16:14:05,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 16:14:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 16:14:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 433 transitions. [2021-06-10 16:14:05,462 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8169811320754717 [2021-06-10 16:14:05,462 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 433 transitions. [2021-06-10 16:14:05,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 433 transitions. [2021-06-10 16:14:05,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:05,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 433 transitions. [2021-06-10 16:14:05,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 43.3) internal successors, (433), 10 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:05,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:05,466 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:05,466 INFO L185 Difference]: Start difference. First operand has 103 places, 116 transitions, 658 flow. Second operand 10 states and 433 transitions. [2021-06-10 16:14:05,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 198 transitions, 1262 flow [2021-06-10 16:14:05,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 198 transitions, 1258 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 16:14:05,527 INFO L241 Difference]: Finished difference. Result has 117 places, 144 transitions, 960 flow [2021-06-10 16:14:05,528 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=960, PETRI_PLACES=117, PETRI_TRANSITIONS=144} [2021-06-10 16:14:05,528 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 59 predicate places. [2021-06-10 16:14:05,528 INFO L480 AbstractCegarLoop]: Abstraction has has 117 places, 144 transitions, 960 flow [2021-06-10 16:14:05,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:05,528 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:05,529 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:05,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-10 16:14:05,529 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:05,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:05,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1694215192, now seen corresponding path program 9 times [2021-06-10 16:14:05,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:05,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290728600] [2021-06-10 16:14:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:05,549 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:05,549 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:05,554 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:05,555 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:05,560 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:05,561 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:05,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:05,568 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:05,576 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:05,576 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:05,585 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:05,585 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:05,603 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-06-10 16:14:05,603 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:05,613 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:05,613 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:05,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290728600] [2021-06-10 16:14:05,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:05,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:14:05,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432089452] [2021-06-10 16:14:05,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:14:05,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:05,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:14:05,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:14:05,618 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 53 [2021-06-10 16:14:05,618 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 144 transitions, 960 flow. Second operand has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:05,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:05,618 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 53 [2021-06-10 16:14:05,618 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:06,172 INFO L129 PetriNetUnfolder]: 970/3917 cut-off events. [2021-06-10 16:14:06,172 INFO L130 PetriNetUnfolder]: For 4672/4857 co-relation queries the response was YES. [2021-06-10 16:14:06,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12295 conditions, 3917 events. 970/3917 cut-off events. For 4672/4857 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 40589 event pairs, 199 based on Foata normal form. 63/3819 useless extension candidates. Maximal degree in co-relation 11956. Up to 453 conditions per place. [2021-06-10 16:14:06,219 INFO L132 encePairwiseOnDemand]: 45/53 looper letters, 32 selfloop transitions, 31 changer transitions 0/168 dead transitions. [2021-06-10 16:14:06,219 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 168 transitions, 1214 flow [2021-06-10 16:14:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-10 16:14:06,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-06-10 16:14:06,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 523 transitions. [2021-06-10 16:14:06,221 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8970840480274442 [2021-06-10 16:14:06,221 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 523 transitions. [2021-06-10 16:14:06,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 523 transitions. [2021-06-10 16:14:06,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:06,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 523 transitions. [2021-06-10 16:14:06,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 47.54545454545455) internal successors, (523), 11 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:06,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:06,224 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:06,224 INFO L185 Difference]: Start difference. First operand has 117 places, 144 transitions, 960 flow. Second operand 11 states and 523 transitions. [2021-06-10 16:14:06,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 168 transitions, 1214 flow [2021-06-10 16:14:06,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 168 transitions, 1188 flow, removed 10 selfloop flow, removed 1 redundant places. [2021-06-10 16:14:06,274 INFO L241 Difference]: Finished difference. Result has 131 places, 156 transitions, 1115 flow [2021-06-10 16:14:06,275 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1115, PETRI_PLACES=131, PETRI_TRANSITIONS=156} [2021-06-10 16:14:06,275 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 73 predicate places. [2021-06-10 16:14:06,275 INFO L480 AbstractCegarLoop]: Abstraction has has 131 places, 156 transitions, 1115 flow [2021-06-10 16:14:06,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:06,275 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:06,275 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:06,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-10 16:14:06,276 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:06,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:06,276 INFO L82 PathProgramCache]: Analyzing trace with hash -302080194, now seen corresponding path program 10 times [2021-06-10 16:14:06,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:06,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343306452] [2021-06-10 16:14:06,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:06,304 INFO L142 QuantifierPusher]: treesize reduction 20, result has 56.5 percent of original size [2021-06-10 16:14:06,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-06-10 16:14:06,324 INFO L142 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-06-10 16:14:06,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:06,330 INFO L142 QuantifierPusher]: treesize reduction 3, result has 76.9 percent of original size [2021-06-10 16:14:06,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:14:06,339 INFO L142 QuantifierPusher]: treesize reduction 3, result has 80.0 percent of original size [2021-06-10 16:14:06,339 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:14:06,348 INFO L142 QuantifierPusher]: treesize reduction 4, result has 75.0 percent of original size [2021-06-10 16:14:06,349 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:14:06,351 INFO L142 QuantifierPusher]: treesize reduction 5, result has 64.3 percent of original size [2021-06-10 16:14:06,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:14:06,369 INFO L142 QuantifierPusher]: treesize reduction 15, result has 46.4 percent of original size [2021-06-10 16:14:06,370 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:14:06,380 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-06-10 16:14:06,380 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:06,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:06,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:06,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343306452] [2021-06-10 16:14:06,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:06,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 16:14:06,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741658235] [2021-06-10 16:14:06,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 16:14:06,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:06,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 16:14:06,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-10 16:14:06,387 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:14:06,388 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 156 transitions, 1115 flow. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:06,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:06,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:14:06,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:07,567 INFO L129 PetriNetUnfolder]: 2996/8047 cut-off events. [2021-06-10 16:14:07,568 INFO L130 PetriNetUnfolder]: For 17458/17820 co-relation queries the response was YES. [2021-06-10 16:14:07,621 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28943 conditions, 8047 events. 2996/8047 cut-off events. For 17458/17820 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 79810 event pairs, 1178 based on Foata normal form. 67/7677 useless extension candidates. Maximal degree in co-relation 28725. Up to 4245 conditions per place. [2021-06-10 16:14:07,656 INFO L132 encePairwiseOnDemand]: 42/53 looper letters, 122 selfloop transitions, 29 changer transitions 0/223 dead transitions. [2021-06-10 16:14:07,656 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 223 transitions, 1861 flow [2021-06-10 16:14:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-10 16:14:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-10 16:14:07,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 296 transitions. [2021-06-10 16:14:07,658 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7978436657681941 [2021-06-10 16:14:07,658 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 296 transitions. [2021-06-10 16:14:07,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 296 transitions. [2021-06-10 16:14:07,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:07,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 296 transitions. [2021-06-10 16:14:07,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 42.285714285714285) internal successors, (296), 7 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:07,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 53.0) internal successors, (424), 8 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:07,661 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 53.0) internal successors, (424), 8 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:07,661 INFO L185 Difference]: Start difference. First operand has 131 places, 156 transitions, 1115 flow. Second operand 7 states and 296 transitions. [2021-06-10 16:14:07,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 223 transitions, 1861 flow [2021-06-10 16:14:07,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 223 transitions, 1832 flow, removed 7 selfloop flow, removed 3 redundant places. [2021-06-10 16:14:07,839 INFO L241 Difference]: Finished difference. Result has 136 places, 173 transitions, 1296 flow [2021-06-10 16:14:07,839 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1296, PETRI_PLACES=136, PETRI_TRANSITIONS=173} [2021-06-10 16:14:07,839 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 78 predicate places. [2021-06-10 16:14:07,839 INFO L480 AbstractCegarLoop]: Abstraction has has 136 places, 173 transitions, 1296 flow [2021-06-10 16:14:07,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:07,840 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:07,840 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:07,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-10 16:14:07,840 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:07,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:07,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1194314402, now seen corresponding path program 11 times [2021-06-10 16:14:07,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:07,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61019436] [2021-06-10 16:14:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:07,873 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:07,874 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:14:07,887 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:07,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:14:07,901 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:07,901 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:14:07,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:07,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:07,922 INFO L142 QuantifierPusher]: treesize reduction 7, result has 68.2 percent of original size [2021-06-10 16:14:07,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:14:07,935 INFO L142 QuantifierPusher]: treesize reduction 7, result has 68.2 percent of original size [2021-06-10 16:14:07,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:14:07,942 INFO L142 QuantifierPusher]: treesize reduction 7, result has 68.2 percent of original size [2021-06-10 16:14:07,944 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:14:07,958 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:07,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-06-10 16:14:07,977 INFO L142 QuantifierPusher]: treesize reduction 9, result has 69.0 percent of original size [2021-06-10 16:14:07,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-06-10 16:14:07,998 INFO L142 QuantifierPusher]: treesize reduction 36, result has 18.2 percent of original size [2021-06-10 16:14:07,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-06-10 16:14:08,011 INFO L142 QuantifierPusher]: treesize reduction 37, result has 24.5 percent of original size [2021-06-10 16:14:08,011 INFO L147 QuantifierPusher]: treesize reduction 4, result has 66.7 percent of original size 8 [2021-06-10 16:14:08,030 INFO L142 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-06-10 16:14:08,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:08,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:08,032 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:08,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61019436] [2021-06-10 16:14:08,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:08,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-06-10 16:14:08,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527387146] [2021-06-10 16:14:08,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-10 16:14:08,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:08,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-10 16:14:08,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-10 16:14:08,034 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:14:08,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 173 transitions, 1296 flow. Second operand has 12 states, 12 states have (on average 34.583333333333336) internal successors, (415), 12 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:08,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:08,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:14:08,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:10,457 INFO L129 PetriNetUnfolder]: 4489/12046 cut-off events. [2021-06-10 16:14:10,457 INFO L130 PetriNetUnfolder]: For 31072/31689 co-relation queries the response was YES. [2021-06-10 16:14:10,610 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45597 conditions, 12046 events. 4489/12046 cut-off events. For 31072/31689 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 127493 event pairs, 422 based on Foata normal form. 272/11919 useless extension candidates. Maximal degree in co-relation 45184. Up to 1580 conditions per place. [2021-06-10 16:14:10,657 INFO L132 encePairwiseOnDemand]: 36/53 looper letters, 271 selfloop transitions, 208 changer transitions 0/551 dead transitions. [2021-06-10 16:14:10,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 551 transitions, 4970 flow [2021-06-10 16:14:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-10 16:14:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-06-10 16:14:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 936 transitions. [2021-06-10 16:14:10,660 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8409703504043127 [2021-06-10 16:14:10,660 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 936 transitions. [2021-06-10 16:14:10,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 936 transitions. [2021-06-10 16:14:10,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:10,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 936 transitions. [2021-06-10 16:14:10,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 44.57142857142857) internal successors, (936), 21 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:10,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 53.0) internal successors, (1166), 22 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:10,665 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 53.0) internal successors, (1166), 22 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:10,666 INFO L185 Difference]: Start difference. First operand has 136 places, 173 transitions, 1296 flow. Second operand 21 states and 936 transitions. [2021-06-10 16:14:10,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 551 transitions, 4970 flow [2021-06-10 16:14:10,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 551 transitions, 4941 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-06-10 16:14:10,929 INFO L241 Difference]: Finished difference. Result has 169 places, 355 transitions, 3693 flow [2021-06-10 16:14:10,929 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3693, PETRI_PLACES=169, PETRI_TRANSITIONS=355} [2021-06-10 16:14:10,929 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 111 predicate places. [2021-06-10 16:14:10,930 INFO L480 AbstractCegarLoop]: Abstraction has has 169 places, 355 transitions, 3693 flow [2021-06-10 16:14:10,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 34.583333333333336) internal successors, (415), 12 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:10,930 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:10,930 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:10,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-10 16:14:10,930 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:10,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:10,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1294125284, now seen corresponding path program 12 times [2021-06-10 16:14:10,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:10,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199485713] [2021-06-10 16:14:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:10,973 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:10,973 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:10,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:10,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:10,986 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:10,986 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:10,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:10,993 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:11,000 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:11,001 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:11,013 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:11,014 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:11,023 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-06-10 16:14:11,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:11,037 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:11,038 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:11,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199485713] [2021-06-10 16:14:11,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:11,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:14:11,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072478293] [2021-06-10 16:14:11,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:14:11,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:11,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:14:11,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:14:11,040 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 53 [2021-06-10 16:14:11,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 355 transitions, 3693 flow. Second operand has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:11,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:11,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 53 [2021-06-10 16:14:11,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:12,894 INFO L129 PetriNetUnfolder]: 3472/10804 cut-off events. [2021-06-10 16:14:12,894 INFO L130 PetriNetUnfolder]: For 49495/50476 co-relation queries the response was YES. [2021-06-10 16:14:12,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48613 conditions, 10804 events. 3472/10804 cut-off events. For 49495/50476 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 121886 event pairs, 496 based on Foata normal form. 375/10731 useless extension candidates. Maximal degree in co-relation 48022. Up to 1371 conditions per place. [2021-06-10 16:14:13,041 INFO L132 encePairwiseOnDemand]: 45/53 looper letters, 40 selfloop transitions, 31 changer transitions 4/375 dead transitions. [2021-06-10 16:14:13,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 375 transitions, 3960 flow [2021-06-10 16:14:13,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-10 16:14:13,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-06-10 16:14:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 523 transitions. [2021-06-10 16:14:13,043 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8970840480274442 [2021-06-10 16:14:13,043 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 523 transitions. [2021-06-10 16:14:13,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 523 transitions. [2021-06-10 16:14:13,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:13,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 523 transitions. [2021-06-10 16:14:13,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 47.54545454545455) internal successors, (523), 11 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:13,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:13,046 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:13,046 INFO L185 Difference]: Start difference. First operand has 169 places, 355 transitions, 3693 flow. Second operand 11 states and 523 transitions. [2021-06-10 16:14:13,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 375 transitions, 3960 flow [2021-06-10 16:14:13,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 375 transitions, 3721 flow, removed 117 selfloop flow, removed 2 redundant places. [2021-06-10 16:14:13,543 INFO L241 Difference]: Finished difference. Result has 182 places, 362 transitions, 3587 flow [2021-06-10 16:14:13,544 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3587, PETRI_PLACES=182, PETRI_TRANSITIONS=362} [2021-06-10 16:14:13,544 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 124 predicate places. [2021-06-10 16:14:13,544 INFO L480 AbstractCegarLoop]: Abstraction has has 182 places, 362 transitions, 3587 flow [2021-06-10 16:14:13,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:13,547 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:13,547 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:13,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-10 16:14:13,547 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:13,548 INFO L82 PathProgramCache]: Analyzing trace with hash 6967100, now seen corresponding path program 13 times [2021-06-10 16:14:13,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:13,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955132062] [2021-06-10 16:14:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:13,586 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:13,587 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:14:13,600 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:13,601 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:14:13,603 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:13,604 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:14:13,611 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:13,611 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:14:13,616 INFO L142 QuantifierPusher]: treesize reduction 23, result has 52.1 percent of original size [2021-06-10 16:14:13,617 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 16:14:13,621 INFO L142 QuantifierPusher]: treesize reduction 4, result has 77.8 percent of original size [2021-06-10 16:14:13,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 16:14:13,634 INFO L142 QuantifierPusher]: treesize reduction 13, result has 48.0 percent of original size [2021-06-10 16:14:13,635 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:14:13,645 INFO L142 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-06-10 16:14:13,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:13,645 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:13,646 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:13,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955132062] [2021-06-10 16:14:13,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:13,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 16:14:13,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799151044] [2021-06-10 16:14:13,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 16:14:13,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:13,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 16:14:13,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-10 16:14:13,648 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:14:13,648 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 362 transitions, 3587 flow. Second operand has 6 states, 6 states have (on average 36.166666666666664) internal successors, (217), 6 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:13,648 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:13,648 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:14:13,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:15,507 INFO L129 PetriNetUnfolder]: 4381/11851 cut-off events. [2021-06-10 16:14:15,508 INFO L130 PetriNetUnfolder]: For 75391/76758 co-relation queries the response was YES. [2021-06-10 16:14:15,577 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58386 conditions, 11851 events. 4381/11851 cut-off events. For 75391/76758 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 124968 event pairs, 983 based on Foata normal form. 213/11640 useless extension candidates. Maximal degree in co-relation 57893. Up to 6169 conditions per place. [2021-06-10 16:14:15,613 INFO L132 encePairwiseOnDemand]: 41/53 looper letters, 298 selfloop transitions, 64 changer transitions 7/452 dead transitions. [2021-06-10 16:14:15,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 452 transitions, 5264 flow [2021-06-10 16:14:15,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-10 16:14:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-10 16:14:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 299 transitions. [2021-06-10 16:14:15,614 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8059299191374663 [2021-06-10 16:14:15,614 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 299 transitions. [2021-06-10 16:14:15,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 299 transitions. [2021-06-10 16:14:15,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:15,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 299 transitions. [2021-06-10 16:14:15,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 42.714285714285715) internal successors, (299), 7 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:15,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 53.0) internal successors, (424), 8 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:15,616 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 53.0) internal successors, (424), 8 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:15,616 INFO L185 Difference]: Start difference. First operand has 182 places, 362 transitions, 3587 flow. Second operand 7 states and 299 transitions. [2021-06-10 16:14:15,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 452 transitions, 5264 flow [2021-06-10 16:14:15,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 452 transitions, 5229 flow, removed 10 selfloop flow, removed 3 redundant places. [2021-06-10 16:14:15,995 INFO L241 Difference]: Finished difference. Result has 188 places, 385 transitions, 4066 flow [2021-06-10 16:14:15,995 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3408, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4066, PETRI_PLACES=188, PETRI_TRANSITIONS=385} [2021-06-10 16:14:15,995 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 130 predicate places. [2021-06-10 16:14:15,996 INFO L480 AbstractCegarLoop]: Abstraction has has 188 places, 385 transitions, 4066 flow [2021-06-10 16:14:15,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 36.166666666666664) internal successors, (217), 6 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:15,996 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:15,996 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:15,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-10 16:14:15,996 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:15,996 INFO L82 PathProgramCache]: Analyzing trace with hash -584011144, now seen corresponding path program 14 times [2021-06-10 16:14:15,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:15,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219467035] [2021-06-10 16:14:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:16,048 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:16,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:14:16,060 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:16,061 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-06-10 16:14:16,078 INFO L142 QuantifierPusher]: treesize reduction 17, result has 63.0 percent of original size [2021-06-10 16:14:16,079 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-06-10 16:14:16,084 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:16,085 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:14:16,093 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:16,093 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:14:16,097 INFO L142 QuantifierPusher]: treesize reduction 7, result has 65.0 percent of original size [2021-06-10 16:14:16,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:14:16,103 INFO L142 QuantifierPusher]: treesize reduction 7, result has 70.8 percent of original size [2021-06-10 16:14:16,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 16:14:16,117 INFO L142 QuantifierPusher]: treesize reduction 7, result has 68.2 percent of original size [2021-06-10 16:14:16,120 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:14:16,133 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:16,133 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:16,156 INFO L142 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size [2021-06-10 16:14:16,157 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 16:14:16,166 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:16,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:16,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219467035] [2021-06-10 16:14:16,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:16,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 16:14:16,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071372101] [2021-06-10 16:14:16,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 16:14:16,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:16,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 16:14:16,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-10 16:14:16,168 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:14:16,169 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 385 transitions, 4066 flow. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:16,169 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:16,169 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:14:16,169 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:18,124 INFO L129 PetriNetUnfolder]: 4169/11368 cut-off events. [2021-06-10 16:14:18,124 INFO L130 PetriNetUnfolder]: For 79049/80652 co-relation queries the response was YES. [2021-06-10 16:14:18,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56905 conditions, 11368 events. 4169/11368 cut-off events. For 79049/80652 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 119663 event pairs, 1016 based on Foata normal form. 248/11181 useless extension candidates. Maximal degree in co-relation 56457. Up to 5846 conditions per place. [2021-06-10 16:14:18,275 INFO L132 encePairwiseOnDemand]: 38/53 looper letters, 342 selfloop transitions, 70 changer transitions 21/516 dead transitions. [2021-06-10 16:14:18,276 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 516 transitions, 6258 flow [2021-06-10 16:14:18,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-10 16:14:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-06-10 16:14:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 501 transitions. [2021-06-10 16:14:18,277 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7877358490566038 [2021-06-10 16:14:18,277 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 501 transitions. [2021-06-10 16:14:18,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 501 transitions. [2021-06-10 16:14:18,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:18,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 501 transitions. [2021-06-10 16:14:18,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 41.75) internal successors, (501), 12 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:18,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:18,280 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:18,280 INFO L185 Difference]: Start difference. First operand has 188 places, 385 transitions, 4066 flow. Second operand 12 states and 501 transitions. [2021-06-10 16:14:18,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 516 transitions, 6258 flow [2021-06-10 16:14:18,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 516 transitions, 6212 flow, removed 17 selfloop flow, removed 2 redundant places. [2021-06-10 16:14:18,652 INFO L241 Difference]: Finished difference. Result has 205 places, 426 transitions, 4786 flow [2021-06-10 16:14:18,652 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3964, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4786, PETRI_PLACES=205, PETRI_TRANSITIONS=426} [2021-06-10 16:14:18,652 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 147 predicate places. [2021-06-10 16:14:18,652 INFO L480 AbstractCegarLoop]: Abstraction has has 205 places, 426 transitions, 4786 flow [2021-06-10 16:14:18,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:18,653 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:18,653 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:18,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-10 16:14:18,653 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:18,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:18,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1153496930, now seen corresponding path program 15 times [2021-06-10 16:14:18,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:18,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571677356] [2021-06-10 16:14:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:18,681 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:18,682 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:18,687 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:18,687 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 16:14:18,691 INFO L142 QuantifierPusher]: treesize reduction 4, result has 73.3 percent of original size [2021-06-10 16:14:18,691 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 16:14:18,702 INFO L142 QuantifierPusher]: treesize reduction 23, result has 39.5 percent of original size [2021-06-10 16:14:18,704 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:14:18,716 INFO L142 QuantifierPusher]: treesize reduction 4, result has 69.2 percent of original size [2021-06-10 16:14:18,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:14:18,725 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-06-10 16:14:18,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:14:18,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:18,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:18,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571677356] [2021-06-10 16:14:18,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:18,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 16:14:18,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173131880] [2021-06-10 16:14:18,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 16:14:18,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:18,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 16:14:18,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-10 16:14:18,849 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:14:18,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 426 transitions, 4786 flow. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:18,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:18,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:14:18,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:21,240 INFO L129 PetriNetUnfolder]: 5186/14364 cut-off events. [2021-06-10 16:14:21,240 INFO L130 PetriNetUnfolder]: For 118874/120810 co-relation queries the response was YES. [2021-06-10 16:14:21,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74418 conditions, 14364 events. 5186/14364 cut-off events. For 118874/120810 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 158530 event pairs, 805 based on Foata normal form. 661/14530 useless extension candidates. Maximal degree in co-relation 73795. Up to 2460 conditions per place. [2021-06-10 16:14:21,416 INFO L132 encePairwiseOnDemand]: 38/53 looper letters, 320 selfloop transitions, 311 changer transitions 2/716 dead transitions. [2021-06-10 16:14:21,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 716 transitions, 9398 flow [2021-06-10 16:14:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 16:14:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 16:14:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 451 transitions. [2021-06-10 16:14:21,418 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8509433962264151 [2021-06-10 16:14:21,418 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 451 transitions. [2021-06-10 16:14:21,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 451 transitions. [2021-06-10 16:14:21,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:21,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 451 transitions. [2021-06-10 16:14:21,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 45.1) internal successors, (451), 10 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:21,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:21,420 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:21,420 INFO L185 Difference]: Start difference. First operand has 205 places, 426 transitions, 4786 flow. Second operand 10 states and 451 transitions. [2021-06-10 16:14:21,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 716 transitions, 9398 flow [2021-06-10 16:14:22,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 716 transitions, 9165 flow, removed 110 selfloop flow, removed 3 redundant places. [2021-06-10 16:14:22,051 INFO L241 Difference]: Finished difference. Result has 218 places, 556 transitions, 7520 flow [2021-06-10 16:14:22,052 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4544, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7520, PETRI_PLACES=218, PETRI_TRANSITIONS=556} [2021-06-10 16:14:22,052 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 160 predicate places. [2021-06-10 16:14:22,052 INFO L480 AbstractCegarLoop]: Abstraction has has 218 places, 556 transitions, 7520 flow [2021-06-10 16:14:22,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:22,053 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:22,053 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:22,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-10 16:14:22,053 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:22,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:22,053 INFO L82 PathProgramCache]: Analyzing trace with hash 806246878, now seen corresponding path program 16 times [2021-06-10 16:14:22,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:22,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911465531] [2021-06-10 16:14:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:22,067 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:22,068 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:22,073 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:22,073 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:22,079 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:22,079 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:22,086 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:22,087 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:22,094 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:22,095 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:22,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:22,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:22,115 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-06-10 16:14:22,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:22,126 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:22,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:22,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911465531] [2021-06-10 16:14:22,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:22,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:14:22,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552102800] [2021-06-10 16:14:22,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:14:22,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:22,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:14:22,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:14:22,128 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 53 [2021-06-10 16:14:22,129 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 556 transitions, 7520 flow. Second operand has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:22,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:22,129 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 53 [2021-06-10 16:14:22,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:24,563 INFO L129 PetriNetUnfolder]: 3758/12321 cut-off events. [2021-06-10 16:14:24,564 INFO L130 PetriNetUnfolder]: For 112418/114530 co-relation queries the response was YES. [2021-06-10 16:14:24,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66006 conditions, 12321 events. 3758/12321 cut-off events. For 112418/114530 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 144284 event pairs, 602 based on Foata normal form. 624/12350 useless extension candidates. Maximal degree in co-relation 65208. Up to 1510 conditions per place. [2021-06-10 16:14:24,687 INFO L132 encePairwiseOnDemand]: 45/53 looper letters, 50 selfloop transitions, 39 changer transitions 1/583 dead transitions. [2021-06-10 16:14:24,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 583 transitions, 7918 flow [2021-06-10 16:14:24,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-10 16:14:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-06-10 16:14:24,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 523 transitions. [2021-06-10 16:14:24,690 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8970840480274442 [2021-06-10 16:14:24,690 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 523 transitions. [2021-06-10 16:14:24,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 523 transitions. [2021-06-10 16:14:24,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:24,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 523 transitions. [2021-06-10 16:14:24,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 47.54545454545455) internal successors, (523), 11 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:24,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:24,693 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:24,694 INFO L185 Difference]: Start difference. First operand has 218 places, 556 transitions, 7520 flow. Second operand 11 states and 523 transitions. [2021-06-10 16:14:24,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 583 transitions, 7918 flow [2021-06-10 16:14:25,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 583 transitions, 7831 flow, removed 43 selfloop flow, removed 1 redundant places. [2021-06-10 16:14:25,311 INFO L241 Difference]: Finished difference. Result has 230 places, 569 transitions, 7656 flow [2021-06-10 16:14:25,311 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=7433, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7656, PETRI_PLACES=230, PETRI_TRANSITIONS=569} [2021-06-10 16:14:25,311 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 172 predicate places. [2021-06-10 16:14:25,312 INFO L480 AbstractCegarLoop]: Abstraction has has 230 places, 569 transitions, 7656 flow [2021-06-10 16:14:25,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:25,312 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:25,312 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:25,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-10 16:14:25,312 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2046836352, now seen corresponding path program 17 times [2021-06-10 16:14:25,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:25,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262791902] [2021-06-10 16:14:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:25,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:25,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:14:25,344 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:25,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:14:25,357 INFO L142 QuantifierPusher]: treesize reduction 15, result has 70.6 percent of original size [2021-06-10 16:14:25,358 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-06-10 16:14:25,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:25,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-06-10 16:14:25,397 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:25,398 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-06-10 16:14:25,413 INFO L142 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-06-10 16:14:25,413 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-06-10 16:14:25,428 INFO L142 QuantifierPusher]: treesize reduction 11, result has 52.2 percent of original size [2021-06-10 16:14:25,428 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:14:25,439 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-06-10 16:14:25,439 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:25,440 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:25,440 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:25,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262791902] [2021-06-10 16:14:25,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:25,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:14:25,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462168920] [2021-06-10 16:14:25,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:14:25,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:25,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:14:25,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:14:25,442 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:14:25,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 569 transitions, 7656 flow. Second operand has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:25,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:25,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:14:25,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:28,563 INFO L129 PetriNetUnfolder]: 5231/15167 cut-off events. [2021-06-10 16:14:28,563 INFO L130 PetriNetUnfolder]: For 179833/182835 co-relation queries the response was YES. [2021-06-10 16:14:28,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89126 conditions, 15167 events. 5231/15167 cut-off events. For 179833/182835 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 173187 event pairs, 1359 based on Foata normal form. 545/15187 useless extension candidates. Maximal degree in co-relation 88304. Up to 7670 conditions per place. [2021-06-10 16:14:28,712 INFO L132 encePairwiseOnDemand]: 40/53 looper letters, 483 selfloop transitions, 92 changer transitions 5/677 dead transitions. [2021-06-10 16:14:28,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 677 transitions, 10299 flow [2021-06-10 16:14:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 16:14:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 16:14:28,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 412 transitions. [2021-06-10 16:14:28,724 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7773584905660378 [2021-06-10 16:14:28,724 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 412 transitions. [2021-06-10 16:14:28,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 412 transitions. [2021-06-10 16:14:28,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:28,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 412 transitions. [2021-06-10 16:14:28,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 41.2) internal successors, (412), 10 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:28,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:28,726 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:28,726 INFO L185 Difference]: Start difference. First operand has 230 places, 569 transitions, 7656 flow. Second operand 10 states and 412 transitions. [2021-06-10 16:14:28,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 677 transitions, 10299 flow [2021-06-10 16:14:29,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 677 transitions, 10159 flow, removed 36 selfloop flow, removed 9 redundant places. [2021-06-10 16:14:29,626 INFO L241 Difference]: Finished difference. Result has 236 places, 606 transitions, 8434 flow [2021-06-10 16:14:29,626 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=7332, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8434, PETRI_PLACES=236, PETRI_TRANSITIONS=606} [2021-06-10 16:14:29,626 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 178 predicate places. [2021-06-10 16:14:29,627 INFO L480 AbstractCegarLoop]: Abstraction has has 236 places, 606 transitions, 8434 flow [2021-06-10 16:14:29,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:29,627 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:29,627 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:29,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-10 16:14:29,627 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:29,627 INFO L82 PathProgramCache]: Analyzing trace with hash -725551576, now seen corresponding path program 18 times [2021-06-10 16:14:29,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:29,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120113500] [2021-06-10 16:14:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:29,644 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:29,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:14:29,654 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:29,655 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:14:29,661 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:29,661 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:29,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:29,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:29,668 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:29,669 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:14:29,675 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:29,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:29,676 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:29,677 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:29,683 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:29,684 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:29,691 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-06-10 16:14:29,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:29,701 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:29,701 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:29,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120113500] [2021-06-10 16:14:29,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:29,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:14:29,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622486403] [2021-06-10 16:14:29,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:14:29,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:29,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:14:29,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:14:29,703 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:14:29,703 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 606 transitions, 8434 flow. Second operand has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:29,703 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:29,703 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:14:29,703 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:33,527 INFO L129 PetriNetUnfolder]: 5707/17864 cut-off events. [2021-06-10 16:14:33,537 INFO L130 PetriNetUnfolder]: For 226075/229057 co-relation queries the response was YES. [2021-06-10 16:14:33,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104342 conditions, 17864 events. 5707/17864 cut-off events. For 226075/229057 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 216538 event pairs, 694 based on Foata normal form. 1352/18692 useless extension candidates. Maximal degree in co-relation 103229. Up to 2650 conditions per place. [2021-06-10 16:14:33,846 INFO L132 encePairwiseOnDemand]: 40/53 looper letters, 492 selfloop transitions, 376 changer transitions 14/979 dead transitions. [2021-06-10 16:14:33,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 979 transitions, 15653 flow [2021-06-10 16:14:34,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-10 16:14:34,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-06-10 16:14:34,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 518 transitions. [2021-06-10 16:14:34,070 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8144654088050315 [2021-06-10 16:14:34,070 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 518 transitions. [2021-06-10 16:14:34,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 518 transitions. [2021-06-10 16:14:34,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:34,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 518 transitions. [2021-06-10 16:14:34,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 43.166666666666664) internal successors, (518), 12 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:34,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:34,072 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:34,072 INFO L185 Difference]: Start difference. First operand has 236 places, 606 transitions, 8434 flow. Second operand 12 states and 518 transitions. [2021-06-10 16:14:34,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 979 transitions, 15653 flow [2021-06-10 16:14:35,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 979 transitions, 15475 flow, removed 79 selfloop flow, removed 2 redundant places. [2021-06-10 16:14:35,390 INFO L241 Difference]: Finished difference. Result has 255 places, 773 transitions, 12457 flow [2021-06-10 16:14:35,391 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=8161, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12457, PETRI_PLACES=255, PETRI_TRANSITIONS=773} [2021-06-10 16:14:35,391 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 197 predicate places. [2021-06-10 16:14:35,391 INFO L480 AbstractCegarLoop]: Abstraction has has 255 places, 773 transitions, 12457 flow [2021-06-10 16:14:35,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:35,391 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:35,391 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:35,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-10 16:14:35,391 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:35,392 INFO L82 PathProgramCache]: Analyzing trace with hash 897093404, now seen corresponding path program 19 times [2021-06-10 16:14:35,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:35,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353352330] [2021-06-10 16:14:35,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:35,404 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:35,405 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:35,409 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:35,410 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:35,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:35,416 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:35,422 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:35,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:35,430 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:35,430 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:35,439 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:35,439 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:35,448 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-06-10 16:14:35,449 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:35,459 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:35,459 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:35,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353352330] [2021-06-10 16:14:35,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:35,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:14:35,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411700870] [2021-06-10 16:14:35,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:14:35,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:35,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:14:35,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:14:35,461 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 53 [2021-06-10 16:14:35,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 773 transitions, 12457 flow. Second operand has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:35,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:35,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 53 [2021-06-10 16:14:35,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:39,223 INFO L129 PetriNetUnfolder]: 4290/15148 cut-off events. [2021-06-10 16:14:39,223 INFO L130 PetriNetUnfolder]: For 206273/208796 co-relation queries the response was YES. [2021-06-10 16:14:39,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89991 conditions, 15148 events. 4290/15148 cut-off events. For 206273/208796 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 189161 event pairs, 750 based on Foata normal form. 1008/15425 useless extension candidates. Maximal degree in co-relation 88735. Up to 1713 conditions per place. [2021-06-10 16:14:39,408 INFO L132 encePairwiseOnDemand]: 45/53 looper letters, 50 selfloop transitions, 41 changer transitions 30/788 dead transitions. [2021-06-10 16:14:39,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 788 transitions, 12754 flow [2021-06-10 16:14:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-10 16:14:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-06-10 16:14:39,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 523 transitions. [2021-06-10 16:14:39,409 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8970840480274442 [2021-06-10 16:14:39,410 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 523 transitions. [2021-06-10 16:14:39,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 523 transitions. [2021-06-10 16:14:39,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:39,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 523 transitions. [2021-06-10 16:14:39,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 47.54545454545455) internal successors, (523), 11 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:39,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:39,412 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:39,412 INFO L185 Difference]: Start difference. First operand has 255 places, 773 transitions, 12457 flow. Second operand 11 states and 523 transitions. [2021-06-10 16:14:39,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 788 transitions, 12754 flow [2021-06-10 16:14:40,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 788 transitions, 12531 flow, removed 111 selfloop flow, removed 1 redundant places. [2021-06-10 16:14:40,866 INFO L241 Difference]: Finished difference. Result has 264 places, 745 transitions, 11777 flow [2021-06-10 16:14:40,866 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=12234, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11777, PETRI_PLACES=264, PETRI_TRANSITIONS=745} [2021-06-10 16:14:40,867 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 206 predicate places. [2021-06-10 16:14:40,867 INFO L480 AbstractCegarLoop]: Abstraction has has 264 places, 745 transitions, 11777 flow [2021-06-10 16:14:40,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 44.888888888888886) internal successors, (404), 9 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:40,867 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:40,867 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:40,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-10 16:14:40,867 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:40,868 INFO L82 PathProgramCache]: Analyzing trace with hash 258723094, now seen corresponding path program 20 times [2021-06-10 16:14:40,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:40,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515705949] [2021-06-10 16:14:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:40,886 INFO L142 QuantifierPusher]: treesize reduction 26, result has 52.7 percent of original size [2021-06-10 16:14:40,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-06-10 16:14:40,902 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:40,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:14:40,914 INFO L142 QuantifierPusher]: treesize reduction 66, result has 28.3 percent of original size [2021-06-10 16:14:40,915 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-06-10 16:14:40,919 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:40,920 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:14:40,926 INFO L142 QuantifierPusher]: treesize reduction 13, result has 63.9 percent of original size [2021-06-10 16:14:40,927 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 16:14:40,941 INFO L142 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-06-10 16:14:40,941 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:40,949 INFO L142 QuantifierPusher]: treesize reduction 16, result has 40.7 percent of original size [2021-06-10 16:14:40,951 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 16:14:40,963 INFO L142 QuantifierPusher]: treesize reduction 13, result has 7.1 percent of original size [2021-06-10 16:14:40,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:40,963 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:40,964 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:40,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515705949] [2021-06-10 16:14:40,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:40,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 16:14:40,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905700048] [2021-06-10 16:14:40,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 16:14:40,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:40,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 16:14:40,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-10 16:14:40,965 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:14:40,966 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 745 transitions, 11777 flow. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:40,966 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:40,966 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:14:40,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:45,426 INFO L129 PetriNetUnfolder]: 6048/18586 cut-off events. [2021-06-10 16:14:45,426 INFO L130 PetriNetUnfolder]: For 299698/303912 co-relation queries the response was YES. [2021-06-10 16:14:45,624 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118930 conditions, 18586 events. 6048/18586 cut-off events. For 299698/303912 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 225576 event pairs, 1432 based on Foata normal form. 775/18742 useless extension candidates. Maximal degree in co-relation 117677. Up to 7635 conditions per place. [2021-06-10 16:14:45,689 INFO L132 encePairwiseOnDemand]: 41/53 looper letters, 725 selfloop transitions, 129 changer transitions 1/954 dead transitions. [2021-06-10 16:14:45,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 954 transitions, 16890 flow [2021-06-10 16:14:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 16:14:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 16:14:45,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 341 transitions. [2021-06-10 16:14:45,690 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8042452830188679 [2021-06-10 16:14:45,691 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 341 transitions. [2021-06-10 16:14:45,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 341 transitions. [2021-06-10 16:14:45,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:45,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 341 transitions. [2021-06-10 16:14:45,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 42.625) internal successors, (341), 8 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:45,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:45,692 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:45,692 INFO L185 Difference]: Start difference. First operand has 264 places, 745 transitions, 11777 flow. Second operand 8 states and 341 transitions. [2021-06-10 16:14:45,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 954 transitions, 16890 flow [2021-06-10 16:14:47,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 954 transitions, 16651 flow, removed 54 selfloop flow, removed 12 redundant places. [2021-06-10 16:14:47,578 INFO L241 Difference]: Finished difference. Result has 263 places, 819 transitions, 13331 flow [2021-06-10 16:14:47,579 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=11528, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13331, PETRI_PLACES=263, PETRI_TRANSITIONS=819} [2021-06-10 16:14:47,579 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 205 predicate places. [2021-06-10 16:14:47,579 INFO L480 AbstractCegarLoop]: Abstraction has has 263 places, 819 transitions, 13331 flow [2021-06-10 16:14:47,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:47,579 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:47,579 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:47,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-10 16:14:47,579 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:47,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:47,580 INFO L82 PathProgramCache]: Analyzing trace with hash -236700810, now seen corresponding path program 21 times [2021-06-10 16:14:47,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:47,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574404337] [2021-06-10 16:14:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:47,597 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:47,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:14:47,610 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:47,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:14:47,621 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:47,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:14:47,630 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:47,631 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:47,638 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:47,638 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:14:47,647 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:47,647 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:47,649 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:47,649 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:47,656 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:47,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:47,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:47,665 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:14:47,675 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:47,675 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:47,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574404337] [2021-06-10 16:14:47,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:47,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-10 16:14:47,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225964988] [2021-06-10 16:14:47,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-10 16:14:47,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:47,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-10 16:14:47,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-10 16:14:47,678 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:14:47,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 819 transitions, 13331 flow. Second operand has 10 states, 10 states have (on average 34.9) internal successors, (349), 10 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:47,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:47,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:14:47,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:52,061 INFO L129 PetriNetUnfolder]: 5651/18112 cut-off events. [2021-06-10 16:14:52,061 INFO L130 PetriNetUnfolder]: For 304490/308632 co-relation queries the response was YES. [2021-06-10 16:14:52,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113946 conditions, 18112 events. 5651/18112 cut-off events. For 304490/308632 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 222972 event pairs, 896 based on Foata normal form. 1593/19189 useless extension candidates. Maximal degree in co-relation 112652. Up to 4219 conditions per place. [2021-06-10 16:14:52,260 INFO L132 encePairwiseOnDemand]: 38/53 looper letters, 547 selfloop transitions, 399 changer transitions 129/1174 dead transitions. [2021-06-10 16:14:52,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 1174 transitions, 21706 flow [2021-06-10 16:14:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-10 16:14:52,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-06-10 16:14:52,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 520 transitions. [2021-06-10 16:14:52,261 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8176100628930818 [2021-06-10 16:14:52,261 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 520 transitions. [2021-06-10 16:14:52,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 520 transitions. [2021-06-10 16:14:52,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:52,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 520 transitions. [2021-06-10 16:14:52,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 43.333333333333336) internal successors, (520), 12 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:52,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:52,264 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:52,264 INFO L185 Difference]: Start difference. First operand has 263 places, 819 transitions, 13331 flow. Second operand 12 states and 520 transitions. [2021-06-10 16:14:52,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 1174 transitions, 21706 flow [2021-06-10 16:14:53,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 1174 transitions, 21321 flow, removed 123 selfloop flow, removed 2 redundant places. [2021-06-10 16:14:53,686 INFO L241 Difference]: Finished difference. Result has 279 places, 884 transitions, 16036 flow [2021-06-10 16:14:53,686 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=13074, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16036, PETRI_PLACES=279, PETRI_TRANSITIONS=884} [2021-06-10 16:14:53,686 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 221 predicate places. [2021-06-10 16:14:53,686 INFO L480 AbstractCegarLoop]: Abstraction has has 279 places, 884 transitions, 16036 flow [2021-06-10 16:14:53,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 34.9) internal successors, (349), 10 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:53,687 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:14:53,687 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:14:53,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-10 16:14:53,687 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:14:53,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:14:53,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1914821430, now seen corresponding path program 22 times [2021-06-10 16:14:53,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:14:53,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790372710] [2021-06-10 16:14:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:14:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:14:53,703 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:53,704 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:14:53,714 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:53,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:14:53,721 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:53,722 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:53,728 INFO L142 QuantifierPusher]: treesize reduction 21, result has 34.4 percent of original size [2021-06-10 16:14:53,729 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 16:14:53,733 INFO L142 QuantifierPusher]: treesize reduction 21, result has 46.2 percent of original size [2021-06-10 16:14:53,733 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-06-10 16:14:53,749 INFO L142 QuantifierPusher]: treesize reduction 16, result has 60.0 percent of original size [2021-06-10 16:14:53,750 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-06-10 16:14:53,767 INFO L142 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-06-10 16:14:53,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:53,775 INFO L142 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-06-10 16:14:53,775 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:14:53,784 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-06-10 16:14:53,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:14:53,793 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:14:53,794 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:14:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:14:53,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790372710] [2021-06-10 16:14:53,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:14:53,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-10 16:14:53,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122290659] [2021-06-10 16:14:53,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-10 16:14:53,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:14:53,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-10 16:14:53,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-10 16:14:53,795 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:14:53,796 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 884 transitions, 16036 flow. Second operand has 10 states, 10 states have (on average 34.9) internal successors, (349), 10 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:53,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:14:53,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:14:53,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:14:58,231 INFO L129 PetriNetUnfolder]: 4797/16196 cut-off events. [2021-06-10 16:14:58,231 INFO L130 PetriNetUnfolder]: For 327037/330342 co-relation queries the response was YES. [2021-06-10 16:14:58,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108271 conditions, 16196 events. 4797/16196 cut-off events. For 327037/330342 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 199911 event pairs, 704 based on Foata normal form. 1283/17053 useless extension candidates. Maximal degree in co-relation 106924. Up to 3039 conditions per place. [2021-06-10 16:14:58,417 INFO L132 encePairwiseOnDemand]: 40/53 looper letters, 507 selfloop transitions, 376 changer transitions 87/1069 dead transitions. [2021-06-10 16:14:58,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1069 transitions, 21422 flow [2021-06-10 16:14:58,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-10 16:14:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-06-10 16:14:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 512 transitions. [2021-06-10 16:14:58,418 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8050314465408805 [2021-06-10 16:14:58,418 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 512 transitions. [2021-06-10 16:14:58,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 512 transitions. [2021-06-10 16:14:58,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:14:58,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 512 transitions. [2021-06-10 16:14:58,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 42.666666666666664) internal successors, (512), 12 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:58,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:58,419 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:14:58,420 INFO L185 Difference]: Start difference. First operand has 279 places, 884 transitions, 16036 flow. Second operand 12 states and 512 transitions. [2021-06-10 16:14:58,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1069 transitions, 21422 flow [2021-06-10 16:15:00,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 1069 transitions, 20691 flow, removed 365 selfloop flow, removed 2 redundant places. [2021-06-10 16:15:00,326 INFO L241 Difference]: Finished difference. Result has 294 places, 833 transitions, 15631 flow [2021-06-10 16:15:00,326 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=14752, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15631, PETRI_PLACES=294, PETRI_TRANSITIONS=833} [2021-06-10 16:15:00,327 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 236 predicate places. [2021-06-10 16:15:00,327 INFO L480 AbstractCegarLoop]: Abstraction has has 294 places, 833 transitions, 15631 flow [2021-06-10 16:15:00,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 34.9) internal successors, (349), 10 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:00,327 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:00,327 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:00,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-10 16:15:00,327 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:00,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:00,327 INFO L82 PathProgramCache]: Analyzing trace with hash 670393400, now seen corresponding path program 23 times [2021-06-10 16:15:00,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:00,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497337894] [2021-06-10 16:15:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:00,344 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:00,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:00,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:00,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:00,354 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:00,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:00,361 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:00,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:00,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:00,363 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:00,370 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:00,370 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-06-10 16:15:00,374 INFO L142 QuantifierPusher]: treesize reduction 14, result has 33.3 percent of original size [2021-06-10 16:15:00,375 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:00,382 INFO L142 QuantifierPusher]: treesize reduction 16, result has 36.0 percent of original size [2021-06-10 16:15:00,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:00,390 INFO L142 QuantifierPusher]: treesize reduction 24, result has 27.3 percent of original size [2021-06-10 16:15:00,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:00,400 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-06-10 16:15:00,401 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:00,401 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:00,401 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:00,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497337894] [2021-06-10 16:15:00,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:00,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 16:15:00,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420303175] [2021-06-10 16:15:00,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 16:15:00,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:00,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 16:15:00,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-10 16:15:00,405 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:00,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 833 transitions, 15631 flow. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:00,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:00,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:00,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:15:04,041 INFO L129 PetriNetUnfolder]: 4090/14449 cut-off events. [2021-06-10 16:15:04,041 INFO L130 PetriNetUnfolder]: For 296535/299503 co-relation queries the response was YES. [2021-06-10 16:15:04,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97418 conditions, 14449 events. 4090/14449 cut-off events. For 296535/299503 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 177494 event pairs, 990 based on Foata normal form. 614/14652 useless extension candidates. Maximal degree in co-relation 96072. Up to 6639 conditions per place. [2021-06-10 16:15:04,219 INFO L132 encePairwiseOnDemand]: 40/53 looper letters, 562 selfloop transitions, 76 changer transitions 125/862 dead transitions. [2021-06-10 16:15:04,219 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 862 transitions, 17484 flow [2021-06-10 16:15:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 16:15:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 16:15:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 426 transitions. [2021-06-10 16:15:04,220 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8037735849056604 [2021-06-10 16:15:04,220 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 426 transitions. [2021-06-10 16:15:04,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 426 transitions. [2021-06-10 16:15:04,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:15:04,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 426 transitions. [2021-06-10 16:15:04,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 42.6) internal successors, (426), 10 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:04,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:04,221 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:04,221 INFO L185 Difference]: Start difference. First operand has 294 places, 833 transitions, 15631 flow. Second operand 10 states and 426 transitions. [2021-06-10 16:15:04,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 862 transitions, 17484 flow [2021-06-10 16:15:06,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 862 transitions, 16995 flow, removed 129 selfloop flow, removed 8 redundant places. [2021-06-10 16:15:06,347 INFO L241 Difference]: Finished difference. Result has 299 places, 697 transitions, 12411 flow [2021-06-10 16:15:06,347 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=13653, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12411, PETRI_PLACES=299, PETRI_TRANSITIONS=697} [2021-06-10 16:15:06,347 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 241 predicate places. [2021-06-10 16:15:06,347 INFO L480 AbstractCegarLoop]: Abstraction has has 299 places, 697 transitions, 12411 flow [2021-06-10 16:15:06,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:06,348 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:06,348 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:06,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-10 16:15:06,348 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:06,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:06,348 INFO L82 PathProgramCache]: Analyzing trace with hash 211367926, now seen corresponding path program 24 times [2021-06-10 16:15:06,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:06,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395317184] [2021-06-10 16:15:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:06,366 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:06,380 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 16:15:06,402 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:06,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-06-10 16:15:06,419 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:06,419 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-06-10 16:15:06,433 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:06,433 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:06,447 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:06,448 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:06,461 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:06,462 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:06,472 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:06,472 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:06,483 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:06,483 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:06,491 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:06,491 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:06,500 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-06-10 16:15:06,501 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:06,510 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:06,511 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:06,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395317184] [2021-06-10 16:15:06,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:06,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-06-10 16:15:06,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128863452] [2021-06-10 16:15:06,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-10 16:15:06,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:06,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-10 16:15:06,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-10 16:15:06,512 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:06,512 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 697 transitions, 12411 flow. Second operand has 12 states, 12 states have (on average 34.583333333333336) internal successors, (415), 12 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:06,512 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:06,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:06,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:15:10,159 INFO L129 PetriNetUnfolder]: 3388/12431 cut-off events. [2021-06-10 16:15:10,159 INFO L130 PetriNetUnfolder]: For 234570/236752 co-relation queries the response was YES. [2021-06-10 16:15:10,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82315 conditions, 12431 events. 3388/12431 cut-off events. For 234570/236752 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 150434 event pairs, 519 based on Foata normal form. 840/12964 useless extension candidates. Maximal degree in co-relation 81861. Up to 1910 conditions per place. [2021-06-10 16:15:10,346 INFO L132 encePairwiseOnDemand]: 35/53 looper letters, 417 selfloop transitions, 298 changer transitions 115/929 dead transitions. [2021-06-10 16:15:10,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 929 transitions, 18292 flow [2021-06-10 16:15:10,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-10 16:15:10,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-06-10 16:15:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 764 transitions. [2021-06-10 16:15:10,348 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.80083857442348 [2021-06-10 16:15:10,348 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 764 transitions. [2021-06-10 16:15:10,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 764 transitions. [2021-06-10 16:15:10,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:15:10,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 764 transitions. [2021-06-10 16:15:10,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 42.44444444444444) internal successors, (764), 18 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:10,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 53.0) internal successors, (1007), 19 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:10,350 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 53.0) internal successors, (1007), 19 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:10,350 INFO L185 Difference]: Start difference. First operand has 299 places, 697 transitions, 12411 flow. Second operand 18 states and 764 transitions. [2021-06-10 16:15:10,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 929 transitions, 18292 flow [2021-06-10 16:15:11,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 929 transitions, 17756 flow, removed 267 selfloop flow, removed 4 redundant places. [2021-06-10 16:15:11,956 INFO L241 Difference]: Finished difference. Result has 323 places, 691 transitions, 12944 flow [2021-06-10 16:15:11,957 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=11523, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=12944, PETRI_PLACES=323, PETRI_TRANSITIONS=691} [2021-06-10 16:15:11,957 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 265 predicate places. [2021-06-10 16:15:11,957 INFO L480 AbstractCegarLoop]: Abstraction has has 323 places, 691 transitions, 12944 flow [2021-06-10 16:15:11,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 34.583333333333336) internal successors, (415), 12 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:11,958 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:11,958 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:11,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-10 16:15:11,958 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:11,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:11,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1567063320, now seen corresponding path program 25 times [2021-06-10 16:15:11,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:11,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364424734] [2021-06-10 16:15:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:11,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:11,977 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:12,000 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:12,001 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:12,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:12,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:12,021 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:12,021 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:12,029 INFO L142 QuantifierPusher]: treesize reduction 28, result has 33.3 percent of original size [2021-06-10 16:15:12,029 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 16:15:12,043 INFO L142 QuantifierPusher]: treesize reduction 4, result has 85.7 percent of original size [2021-06-10 16:15:12,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-06-10 16:15:12,058 INFO L142 QuantifierPusher]: treesize reduction 12, result has 36.8 percent of original size [2021-06-10 16:15:12,058 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:12,059 INFO L142 QuantifierPusher]: treesize reduction 12, result has 36.8 percent of original size [2021-06-10 16:15:12,059 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:12,068 INFO L142 QuantifierPusher]: treesize reduction 12, result has 36.8 percent of original size [2021-06-10 16:15:12,069 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:12,077 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:12,077 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:12,086 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:12,087 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:12,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364424734] [2021-06-10 16:15:12,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:12,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-06-10 16:15:12,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969864582] [2021-06-10 16:15:12,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-10 16:15:12,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:12,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-10 16:15:12,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-10 16:15:12,088 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:12,088 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 691 transitions, 12944 flow. Second operand has 11 states, 11 states have (on average 34.72727272727273) internal successors, (382), 11 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:12,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:12,089 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:12,089 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:15:14,660 INFO L129 PetriNetUnfolder]: 2150/7534 cut-off events. [2021-06-10 16:15:14,660 INFO L130 PetriNetUnfolder]: For 179262/180401 co-relation queries the response was YES. [2021-06-10 16:15:14,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55059 conditions, 7534 events. 2150/7534 cut-off events. For 179262/180401 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 83608 event pairs, 374 based on Foata normal form. 636/7963 useless extension candidates. Maximal degree in co-relation 54944. Up to 1244 conditions per place. [2021-06-10 16:15:14,782 INFO L132 encePairwiseOnDemand]: 37/53 looper letters, 325 selfloop transitions, 321 changer transitions 54/765 dead transitions. [2021-06-10 16:15:14,782 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 765 transitions, 16092 flow [2021-06-10 16:15:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-10 16:15:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-06-10 16:15:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 712 transitions. [2021-06-10 16:15:14,783 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7902330743618202 [2021-06-10 16:15:14,783 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 712 transitions. [2021-06-10 16:15:14,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 712 transitions. [2021-06-10 16:15:14,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:15:14,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 712 transitions. [2021-06-10 16:15:14,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 41.88235294117647) internal successors, (712), 17 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:14,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 53.0) internal successors, (954), 18 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:14,786 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 53.0) internal successors, (954), 18 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:14,786 INFO L185 Difference]: Start difference. First operand has 323 places, 691 transitions, 12944 flow. Second operand 17 states and 712 transitions. [2021-06-10 16:15:14,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 765 transitions, 16092 flow [2021-06-10 16:15:16,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 765 transitions, 15387 flow, removed 221 selfloop flow, removed 14 redundant places. [2021-06-10 16:15:16,209 INFO L241 Difference]: Finished difference. Result has 323 places, 618 transitions, 12161 flow [2021-06-10 16:15:16,209 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=11427, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=12161, PETRI_PLACES=323, PETRI_TRANSITIONS=618} [2021-06-10 16:15:16,209 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 265 predicate places. [2021-06-10 16:15:16,209 INFO L480 AbstractCegarLoop]: Abstraction has has 323 places, 618 transitions, 12161 flow [2021-06-10 16:15:16,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 34.72727272727273) internal successors, (382), 11 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:16,210 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:16,210 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:16,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-10 16:15:16,210 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:16,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:16,210 INFO L82 PathProgramCache]: Analyzing trace with hash 536930372, now seen corresponding path program 26 times [2021-06-10 16:15:16,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:16,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25929188] [2021-06-10 16:15:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:16,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:16,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:16,238 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:16,239 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:16,239 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:16,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:16,247 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:16,248 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:16,255 INFO L142 QuantifierPusher]: treesize reduction 9, result has 60.9 percent of original size [2021-06-10 16:15:16,255 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 16:15:16,264 INFO L142 QuantifierPusher]: treesize reduction 9, result has 64.0 percent of original size [2021-06-10 16:15:16,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:16,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:16,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:16,293 INFO L142 QuantifierPusher]: treesize reduction 17, result has 52.8 percent of original size [2021-06-10 16:15:16,293 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-06-10 16:15:16,307 INFO L142 QuantifierPusher]: treesize reduction 3, result has 89.3 percent of original size [2021-06-10 16:15:16,307 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 16:15:16,324 INFO L142 QuantifierPusher]: treesize reduction 1, result has 93.3 percent of original size [2021-06-10 16:15:16,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 16:15:16,335 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:16,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:16,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25929188] [2021-06-10 16:15:16,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:16,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-06-10 16:15:16,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668531653] [2021-06-10 16:15:16,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-10 16:15:16,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:16,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-10 16:15:16,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-10 16:15:16,337 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:16,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 618 transitions, 12161 flow. Second operand has 11 states, 11 states have (on average 34.72727272727273) internal successors, (382), 11 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:16,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:16,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:16,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:15:18,631 INFO L129 PetriNetUnfolder]: 2142/7673 cut-off events. [2021-06-10 16:15:18,631 INFO L130 PetriNetUnfolder]: For 183780/184934 co-relation queries the response was YES. [2021-06-10 16:15:18,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56292 conditions, 7673 events. 2142/7673 cut-off events. For 183780/184934 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 86107 event pairs, 461 based on Foata normal form. 408/7855 useless extension candidates. Maximal degree in co-relation 56181. Up to 3116 conditions per place. [2021-06-10 16:15:18,740 INFO L132 encePairwiseOnDemand]: 35/53 looper letters, 488 selfloop transitions, 196 changer transitions 35/784 dead transitions. [2021-06-10 16:15:18,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 784 transitions, 16825 flow [2021-06-10 16:15:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-10 16:15:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-06-10 16:15:18,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 563 transitions. [2021-06-10 16:15:18,741 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8171262699564587 [2021-06-10 16:15:18,741 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 563 transitions. [2021-06-10 16:15:18,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 563 transitions. [2021-06-10 16:15:18,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:15:18,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 563 transitions. [2021-06-10 16:15:18,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 43.30769230769231) internal successors, (563), 13 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:18,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 53.0) internal successors, (742), 14 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:18,743 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 53.0) internal successors, (742), 14 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:18,743 INFO L185 Difference]: Start difference. First operand has 323 places, 618 transitions, 12161 flow. Second operand 13 states and 563 transitions. [2021-06-10 16:15:18,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 784 transitions, 16825 flow [2021-06-10 16:15:20,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 784 transitions, 16251 flow, removed 125 selfloop flow, removed 13 redundant places. [2021-06-10 16:15:20,099 INFO L241 Difference]: Finished difference. Result has 324 places, 674 transitions, 13633 flow [2021-06-10 16:15:20,099 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=11401, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13633, PETRI_PLACES=324, PETRI_TRANSITIONS=674} [2021-06-10 16:15:20,100 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 266 predicate places. [2021-06-10 16:15:20,100 INFO L480 AbstractCegarLoop]: Abstraction has has 324 places, 674 transitions, 13633 flow [2021-06-10 16:15:20,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 34.72727272727273) internal successors, (382), 11 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:20,100 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:20,100 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:20,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-10 16:15:20,100 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:20,100 INFO L82 PathProgramCache]: Analyzing trace with hash 548771670, now seen corresponding path program 27 times [2021-06-10 16:15:20,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:20,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252313221] [2021-06-10 16:15:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:20,124 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:20,125 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:20,129 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:20,130 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 16:15:20,133 INFO L142 QuantifierPusher]: treesize reduction 7, result has 73.1 percent of original size [2021-06-10 16:15:20,134 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-06-10 16:15:20,147 INFO L142 QuantifierPusher]: treesize reduction 14, result has 39.1 percent of original size [2021-06-10 16:15:20,147 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:20,155 INFO L142 QuantifierPusher]: treesize reduction 26, result has 21.2 percent of original size [2021-06-10 16:15:20,155 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:20,164 INFO L142 QuantifierPusher]: treesize reduction 14, result has 39.1 percent of original size [2021-06-10 16:15:20,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:20,173 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:20,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:20,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252313221] [2021-06-10 16:15:20,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:20,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 16:15:20,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289380069] [2021-06-10 16:15:20,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 16:15:20,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:20,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 16:15:20,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-10 16:15:20,175 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:20,175 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 674 transitions, 13633 flow. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:20,175 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:20,175 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:20,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:15:22,719 INFO L129 PetriNetUnfolder]: 2466/8789 cut-off events. [2021-06-10 16:15:22,719 INFO L130 PetriNetUnfolder]: For 224025/225317 co-relation queries the response was YES. [2021-06-10 16:15:22,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65538 conditions, 8789 events. 2466/8789 cut-off events. For 224025/225317 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 101904 event pairs, 506 based on Foata normal form. 474/8983 useless extension candidates. Maximal degree in co-relation 65424. Up to 2161 conditions per place. [2021-06-10 16:15:22,854 INFO L132 encePairwiseOnDemand]: 38/53 looper letters, 437 selfloop transitions, 352 changer transitions 9/863 dead transitions. [2021-06-10 16:15:22,854 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 863 transitions, 18977 flow [2021-06-10 16:15:22,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-10 16:15:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-06-10 16:15:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 516 transitions. [2021-06-10 16:15:22,855 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8113207547169812 [2021-06-10 16:15:22,855 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 516 transitions. [2021-06-10 16:15:22,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 516 transitions. [2021-06-10 16:15:22,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:15:22,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 516 transitions. [2021-06-10 16:15:22,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 43.0) internal successors, (516), 12 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:22,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:22,861 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:22,862 INFO L185 Difference]: Start difference. First operand has 324 places, 674 transitions, 13633 flow. Second operand 12 states and 516 transitions. [2021-06-10 16:15:22,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 863 transitions, 18977 flow [2021-06-10 16:15:24,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 863 transitions, 18436 flow, removed 160 selfloop flow, removed 5 redundant places. [2021-06-10 16:15:24,382 INFO L241 Difference]: Finished difference. Result has 333 places, 716 transitions, 15186 flow [2021-06-10 16:15:24,383 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=13235, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15186, PETRI_PLACES=333, PETRI_TRANSITIONS=716} [2021-06-10 16:15:24,383 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 275 predicate places. [2021-06-10 16:15:24,383 INFO L480 AbstractCegarLoop]: Abstraction has has 333 places, 716 transitions, 15186 flow [2021-06-10 16:15:24,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:24,383 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:24,384 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:24,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-10 16:15:24,384 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:24,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:24,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2130583314, now seen corresponding path program 28 times [2021-06-10 16:15:24,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:24,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036527120] [2021-06-10 16:15:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:24,401 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:24,401 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-06-10 16:15:24,416 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:24,417 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-06-10 16:15:24,419 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:24,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:24,422 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:24,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:24,434 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:24,434 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:24,442 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:24,442 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:24,449 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:24,450 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:24,457 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:24,457 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:24,465 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:24,465 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:24,474 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:24,474 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:24,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036527120] [2021-06-10 16:15:24,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:24,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:15:24,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619710613] [2021-06-10 16:15:24,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:15:24,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:24,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:15:24,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:15:24,476 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:24,476 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 716 transitions, 15186 flow. Second operand has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:24,476 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:24,476 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:24,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:15:26,636 INFO L129 PetriNetUnfolder]: 1956/7067 cut-off events. [2021-06-10 16:15:26,636 INFO L130 PetriNetUnfolder]: For 190371/191327 co-relation queries the response was YES. [2021-06-10 16:15:26,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53951 conditions, 7067 events. 1956/7067 cut-off events. For 190371/191327 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 80234 event pairs, 463 based on Foata normal form. 393/7201 useless extension candidates. Maximal degree in co-relation 53836. Up to 1577 conditions per place. [2021-06-10 16:15:26,737 INFO L132 encePairwiseOnDemand]: 38/53 looper letters, 333 selfloop transitions, 225 changer transitions 137/752 dead transitions. [2021-06-10 16:15:26,737 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 752 transitions, 17194 flow [2021-06-10 16:15:26,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-10 16:15:26,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-06-10 16:15:26,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 665 transitions. [2021-06-10 16:15:26,738 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7841981132075472 [2021-06-10 16:15:26,738 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 665 transitions. [2021-06-10 16:15:26,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 665 transitions. [2021-06-10 16:15:26,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:15:26,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 665 transitions. [2021-06-10 16:15:26,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 41.5625) internal successors, (665), 16 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:26,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 53.0) internal successors, (901), 17 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:26,741 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 53.0) internal successors, (901), 17 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:26,741 INFO L185 Difference]: Start difference. First operand has 333 places, 716 transitions, 15186 flow. Second operand 16 states and 665 transitions. [2021-06-10 16:15:26,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 752 transitions, 17194 flow [2021-06-10 16:15:28,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 752 transitions, 16994 flow, removed 78 selfloop flow, removed 7 redundant places. [2021-06-10 16:15:28,107 INFO L241 Difference]: Finished difference. Result has 347 places, 560 transitions, 12035 flow [2021-06-10 16:15:28,108 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=13699, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12035, PETRI_PLACES=347, PETRI_TRANSITIONS=560} [2021-06-10 16:15:28,108 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 289 predicate places. [2021-06-10 16:15:28,108 INFO L480 AbstractCegarLoop]: Abstraction has has 347 places, 560 transitions, 12035 flow [2021-06-10 16:15:28,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:28,108 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:28,108 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:28,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-10 16:15:28,108 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:28,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:28,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1920373896, now seen corresponding path program 29 times [2021-06-10 16:15:28,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:28,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124189951] [2021-06-10 16:15:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:28,127 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:28,128 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:28,133 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:28,134 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:28,139 INFO L142 QuantifierPusher]: treesize reduction 13, result has 66.7 percent of original size [2021-06-10 16:15:28,139 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-06-10 16:15:28,143 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:28,143 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 16:15:28,147 INFO L142 QuantifierPusher]: treesize reduction 15, result has 31.8 percent of original size [2021-06-10 16:15:28,148 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:28,154 INFO L142 QuantifierPusher]: treesize reduction 15, result has 37.5 percent of original size [2021-06-10 16:15:28,154 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:28,161 INFO L142 QuantifierPusher]: treesize reduction 16, result has 30.4 percent of original size [2021-06-10 16:15:28,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:28,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:28,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:28,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124189951] [2021-06-10 16:15:28,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:28,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 16:15:28,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711243608] [2021-06-10 16:15:28,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 16:15:28,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:28,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 16:15:28,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-06-10 16:15:28,171 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:28,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 560 transitions, 12035 flow. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:28,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:28,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:28,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:15:30,131 INFO L129 PetriNetUnfolder]: 1756/6656 cut-off events. [2021-06-10 16:15:30,131 INFO L130 PetriNetUnfolder]: For 191574/192354 co-relation queries the response was YES. [2021-06-10 16:15:30,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52008 conditions, 6656 events. 1756/6656 cut-off events. For 191574/192354 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 75437 event pairs, 399 based on Foata normal form. 297/6737 useless extension candidates. Maximal degree in co-relation 51889. Up to 1187 conditions per place. [2021-06-10 16:15:30,214 INFO L132 encePairwiseOnDemand]: 41/53 looper letters, 369 selfloop transitions, 215 changer transitions 116/756 dead transitions. [2021-06-10 16:15:30,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 756 transitions, 17849 flow [2021-06-10 16:15:30,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 16:15:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 16:15:30,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 443 transitions. [2021-06-10 16:15:30,216 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8358490566037736 [2021-06-10 16:15:30,216 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 443 transitions. [2021-06-10 16:15:30,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 443 transitions. [2021-06-10 16:15:30,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:15:30,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 443 transitions. [2021-06-10 16:15:30,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 44.3) internal successors, (443), 10 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:30,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:30,217 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:30,217 INFO L185 Difference]: Start difference. First operand has 347 places, 560 transitions, 12035 flow. Second operand 10 states and 443 transitions. [2021-06-10 16:15:30,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 756 transitions, 17849 flow [2021-06-10 16:15:31,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 756 transitions, 17377 flow, removed 91 selfloop flow, removed 10 redundant places. [2021-06-10 16:15:31,342 INFO L241 Difference]: Finished difference. Result has 349 places, 570 transitions, 12887 flow [2021-06-10 16:15:31,343 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=11648, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12887, PETRI_PLACES=349, PETRI_TRANSITIONS=570} [2021-06-10 16:15:31,343 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 291 predicate places. [2021-06-10 16:15:31,344 INFO L480 AbstractCegarLoop]: Abstraction has has 349 places, 570 transitions, 12887 flow [2021-06-10 16:15:31,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:31,344 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:31,344 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:31,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-10 16:15:31,344 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:31,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:31,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2105272602, now seen corresponding path program 30 times [2021-06-10 16:15:31,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:31,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783260782] [2021-06-10 16:15:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:31,374 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:31,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:31,385 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:31,386 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:31,386 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:31,386 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:31,397 INFO L142 QuantifierPusher]: treesize reduction 4, result has 84.0 percent of original size [2021-06-10 16:15:31,398 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 16:15:31,420 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:31,421 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 16:15:31,444 INFO L142 QuantifierPusher]: treesize reduction 4, result has 88.2 percent of original size [2021-06-10 16:15:31,445 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-06-10 16:15:31,476 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:31,477 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-06-10 16:15:31,512 INFO L142 QuantifierPusher]: treesize reduction 14, result has 75.9 percent of original size [2021-06-10 16:15:31,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-06-10 16:15:31,544 INFO L142 QuantifierPusher]: treesize reduction 12, result has 68.4 percent of original size [2021-06-10 16:15:31,545 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-06-10 16:15:31,578 INFO L142 QuantifierPusher]: treesize reduction 23, result has 65.2 percent of original size [2021-06-10 16:15:31,580 INFO L147 QuantifierPusher]: treesize reduction 5, result has 88.4 percent of original size 38 [2021-06-10 16:15:31,612 INFO L142 QuantifierPusher]: treesize reduction 27, result has 27.0 percent of original size [2021-06-10 16:15:31,612 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:31,625 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-06-10 16:15:31,627 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:31,627 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:31,627 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:31,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783260782] [2021-06-10 16:15:31,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:31,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-06-10 16:15:31,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745821639] [2021-06-10 16:15:31,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-10 16:15:31,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:31,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-10 16:15:31,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-10 16:15:31,629 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:31,629 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 570 transitions, 12887 flow. Second operand has 12 states, 12 states have (on average 34.583333333333336) internal successors, (415), 12 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:31,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:31,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:31,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:15:34,852 INFO L129 PetriNetUnfolder]: 1916/7246 cut-off events. [2021-06-10 16:15:34,852 INFO L130 PetriNetUnfolder]: For 233698/234633 co-relation queries the response was YES. [2021-06-10 16:15:34,929 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58955 conditions, 7246 events. 1916/7246 cut-off events. For 233698/234633 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 83251 event pairs, 601 based on Foata normal form. 298/7314 useless extension candidates. Maximal degree in co-relation 58834. Up to 2802 conditions per place. [2021-06-10 16:15:34,956 INFO L132 encePairwiseOnDemand]: 38/53 looper letters, 448 selfloop transitions, 263 changer transitions 53/820 dead transitions. [2021-06-10 16:15:34,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 820 transitions, 20562 flow [2021-06-10 16:15:34,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-10 16:15:34,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-06-10 16:15:34,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1290 transitions. [2021-06-10 16:15:34,957 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7375643224699828 [2021-06-10 16:15:34,958 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1290 transitions. [2021-06-10 16:15:34,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1290 transitions. [2021-06-10 16:15:34,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:15:34,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1290 transitions. [2021-06-10 16:15:34,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 39.09090909090909) internal successors, (1290), 33 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:34,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 53.0) internal successors, (1802), 34 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:34,961 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 53.0) internal successors, (1802), 34 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:34,961 INFO L185 Difference]: Start difference. First operand has 349 places, 570 transitions, 12887 flow. Second operand 33 states and 1290 transitions. [2021-06-10 16:15:34,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 820 transitions, 20562 flow [2021-06-10 16:15:36,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 820 transitions, 20269 flow, removed 86 selfloop flow, removed 7 redundant places. [2021-06-10 16:15:36,285 INFO L241 Difference]: Finished difference. Result has 394 places, 702 transitions, 17253 flow [2021-06-10 16:15:36,286 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=12389, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=17253, PETRI_PLACES=394, PETRI_TRANSITIONS=702} [2021-06-10 16:15:36,286 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 336 predicate places. [2021-06-10 16:15:36,286 INFO L480 AbstractCegarLoop]: Abstraction has has 394 places, 702 transitions, 17253 flow [2021-06-10 16:15:36,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 34.583333333333336) internal successors, (415), 12 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:36,287 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:36,287 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:36,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-10 16:15:36,287 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:36,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:36,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2123704910, now seen corresponding path program 31 times [2021-06-10 16:15:36,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:36,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101586748] [2021-06-10 16:15:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:36,317 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:36,317 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:36,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:36,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:36,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:36,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:36,342 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:36,343 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:36,349 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:36,350 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:36,350 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:36,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 16:15:36,360 INFO L142 QuantifierPusher]: treesize reduction 28, result has 30.0 percent of original size [2021-06-10 16:15:36,360 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:15:36,368 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:36,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 16:15:36,382 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:36,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:15:36,391 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:36,391 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:36,401 INFO L142 QuantifierPusher]: treesize reduction 9, result has 66.7 percent of original size [2021-06-10 16:15:36,402 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-06-10 16:15:36,415 INFO L142 QuantifierPusher]: treesize reduction 8, result has 55.6 percent of original size [2021-06-10 16:15:36,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:36,425 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:36,426 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:36,426 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:36,426 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:36,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101586748] [2021-06-10 16:15:36,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:36,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-06-10 16:15:36,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567960495] [2021-06-10 16:15:36,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-10 16:15:36,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:36,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-10 16:15:36,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-10 16:15:36,428 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:36,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 702 transitions, 17253 flow. Second operand has 12 states, 12 states have (on average 34.583333333333336) internal successors, (415), 12 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:36,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:36,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:36,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:15:39,103 INFO L129 PetriNetUnfolder]: 1967/7329 cut-off events. [2021-06-10 16:15:39,103 INFO L130 PetriNetUnfolder]: For 276454/277552 co-relation queries the response was YES. [2021-06-10 16:15:39,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62931 conditions, 7329 events. 1967/7329 cut-off events. For 276454/277552 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 84157 event pairs, 612 based on Foata normal form. 322/7405 useless extension candidates. Maximal degree in co-relation 62793. Up to 3076 conditions per place. [2021-06-10 16:15:39,212 INFO L132 encePairwiseOnDemand]: 38/53 looper letters, 516 selfloop transitions, 221 changer transitions 19/812 dead transitions. [2021-06-10 16:15:39,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 812 transitions, 21683 flow [2021-06-10 16:15:39,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-10 16:15:39,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-06-10 16:15:39,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 569 transitions. [2021-06-10 16:15:39,213 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7668463611859838 [2021-06-10 16:15:39,213 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 569 transitions. [2021-06-10 16:15:39,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 569 transitions. [2021-06-10 16:15:39,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:15:39,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 569 transitions. [2021-06-10 16:15:39,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 40.642857142857146) internal successors, (569), 14 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:39,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 53.0) internal successors, (795), 15 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:39,216 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 53.0) internal successors, (795), 15 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:39,216 INFO L185 Difference]: Start difference. First operand has 394 places, 702 transitions, 17253 flow. Second operand 14 states and 569 transitions. [2021-06-10 16:15:39,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 812 transitions, 21683 flow [2021-06-10 16:15:40,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 812 transitions, 20653 flow, removed 428 selfloop flow, removed 11 redundant places. [2021-06-10 16:15:40,893 INFO L241 Difference]: Finished difference. Result has 395 places, 752 transitions, 18606 flow [2021-06-10 16:15:40,893 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=16320, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18606, PETRI_PLACES=395, PETRI_TRANSITIONS=752} [2021-06-10 16:15:40,893 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 337 predicate places. [2021-06-10 16:15:40,893 INFO L480 AbstractCegarLoop]: Abstraction has has 395 places, 752 transitions, 18606 flow [2021-06-10 16:15:40,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 34.583333333333336) internal successors, (415), 12 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:40,894 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:40,894 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:40,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-10 16:15:40,894 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:40,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1136369414, now seen corresponding path program 32 times [2021-06-10 16:15:40,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:40,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719308583] [2021-06-10 16:15:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:40,921 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:40,921 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:40,934 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:40,934 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:40,934 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:40,935 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:40,945 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:40,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:40,953 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:40,953 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:40,954 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:40,956 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 16:15:40,964 INFO L142 QuantifierPusher]: treesize reduction 4, result has 75.0 percent of original size [2021-06-10 16:15:40,964 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:15:40,971 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:40,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 16:15:40,979 INFO L142 QuantifierPusher]: treesize reduction 4, result has 75.0 percent of original size [2021-06-10 16:15:40,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:15:41,166 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-10 16:15:41,167 INFO L142 QuantifierPusher]: treesize reduction 5, result has 64.3 percent of original size [2021-06-10 16:15:41,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:41,176 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-06-10 16:15:41,177 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:41,177 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:41,177 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:41,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719308583] [2021-06-10 16:15:41,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:41,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-10 16:15:41,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205562038] [2021-06-10 16:15:41,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-10 16:15:41,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:41,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-10 16:15:41,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-10 16:15:41,178 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:41,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 752 transitions, 18606 flow. Second operand has 10 states, 10 states have (on average 34.9) internal successors, (349), 10 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:41,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:41,179 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:41,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:15:43,381 INFO L129 PetriNetUnfolder]: 1827/6900 cut-off events. [2021-06-10 16:15:43,381 INFO L130 PetriNetUnfolder]: For 269413/270489 co-relation queries the response was YES. [2021-06-10 16:15:43,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59678 conditions, 6900 events. 1827/6900 cut-off events. For 269413/270489 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 78887 event pairs, 621 based on Foata normal form. 249/6922 useless extension candidates. Maximal degree in co-relation 59538. Up to 3213 conditions per place. [2021-06-10 16:15:43,503 INFO L132 encePairwiseOnDemand]: 41/53 looper letters, 537 selfloop transitions, 163 changer transitions 10/766 dead transitions. [2021-06-10 16:15:43,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 766 transitions, 20191 flow [2021-06-10 16:15:43,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-10 16:15:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-06-10 16:15:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 482 transitions. [2021-06-10 16:15:43,504 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7578616352201258 [2021-06-10 16:15:43,504 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 482 transitions. [2021-06-10 16:15:43,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 482 transitions. [2021-06-10 16:15:43,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:15:43,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 482 transitions. [2021-06-10 16:15:43,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 40.166666666666664) internal successors, (482), 12 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:43,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:43,506 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:43,506 INFO L185 Difference]: Start difference. First operand has 395 places, 752 transitions, 18606 flow. Second operand 12 states and 482 transitions. [2021-06-10 16:15:43,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 766 transitions, 20191 flow [2021-06-10 16:15:44,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 766 transitions, 20017 flow, removed 75 selfloop flow, removed 2 redundant places. [2021-06-10 16:15:45,007 INFO L241 Difference]: Finished difference. Result has 406 places, 722 transitions, 17891 flow [2021-06-10 16:15:45,007 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=17682, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17891, PETRI_PLACES=406, PETRI_TRANSITIONS=722} [2021-06-10 16:15:45,007 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 348 predicate places. [2021-06-10 16:15:45,007 INFO L480 AbstractCegarLoop]: Abstraction has has 406 places, 722 transitions, 17891 flow [2021-06-10 16:15:45,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 34.9) internal successors, (349), 10 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:45,008 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:45,008 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:45,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-10 16:15:45,008 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:45,008 INFO L82 PathProgramCache]: Analyzing trace with hash -945667578, now seen corresponding path program 33 times [2021-06-10 16:15:45,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:45,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269507809] [2021-06-10 16:15:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:45,024 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:45,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:45,037 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:45,037 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:45,038 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:45,038 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:45,048 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:45,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:45,056 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:45,056 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:45,063 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:45,063 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:45,070 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:45,071 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:45,084 INFO L142 QuantifierPusher]: treesize reduction 29, result has 35.6 percent of original size [2021-06-10 16:15:45,084 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:45,094 INFO L142 QuantifierPusher]: treesize reduction 7, result has 72.0 percent of original size [2021-06-10 16:15:45,095 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-06-10 16:15:45,109 INFO L142 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-06-10 16:15:45,109 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:45,117 INFO L142 QuantifierPusher]: treesize reduction 4, result has 69.2 percent of original size [2021-06-10 16:15:45,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:45,125 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:45,125 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:45,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269507809] [2021-06-10 16:15:45,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:45,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-06-10 16:15:45,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857602480] [2021-06-10 16:15:45,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-10 16:15:45,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:45,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-10 16:15:45,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-10 16:15:45,127 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:45,127 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 722 transitions, 17891 flow. Second operand has 12 states, 12 states have (on average 34.583333333333336) internal successors, (415), 12 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:45,127 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:45,127 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:45,127 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:15:47,511 INFO L129 PetriNetUnfolder]: 1733/6655 cut-off events. [2021-06-10 16:15:47,511 INFO L130 PetriNetUnfolder]: For 262155/263165 co-relation queries the response was YES. [2021-06-10 16:15:47,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57613 conditions, 6655 events. 1733/6655 cut-off events. For 262155/263165 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 76502 event pairs, 579 based on Foata normal form. 321/6768 useless extension candidates. Maximal degree in co-relation 57471. Up to 2680 conditions per place. [2021-06-10 16:15:47,615 INFO L132 encePairwiseOnDemand]: 38/53 looper letters, 482 selfloop transitions, 217 changer transitions 19/771 dead transitions. [2021-06-10 16:15:47,615 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 771 transitions, 20575 flow [2021-06-10 16:15:47,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-10 16:15:47,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-06-10 16:15:47,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 602 transitions. [2021-06-10 16:15:47,616 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7572327044025158 [2021-06-10 16:15:47,616 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 602 transitions. [2021-06-10 16:15:47,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 602 transitions. [2021-06-10 16:15:47,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:15:47,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 602 transitions. [2021-06-10 16:15:47,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 40.13333333333333) internal successors, (602), 15 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:47,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 53.0) internal successors, (848), 16 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:47,619 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 53.0) internal successors, (848), 16 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:47,619 INFO L185 Difference]: Start difference. First operand has 406 places, 722 transitions, 17891 flow. Second operand 15 states and 602 transitions. [2021-06-10 16:15:47,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 771 transitions, 20575 flow [2021-06-10 16:15:48,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 771 transitions, 20118 flow, removed 30 selfloop flow, removed 14 redundant places. [2021-06-10 16:15:48,972 INFO L241 Difference]: Finished difference. Result has 411 places, 701 transitions, 17593 flow [2021-06-10 16:15:48,973 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=16907, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=17593, PETRI_PLACES=411, PETRI_TRANSITIONS=701} [2021-06-10 16:15:48,973 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 353 predicate places. [2021-06-10 16:15:48,973 INFO L480 AbstractCegarLoop]: Abstraction has has 411 places, 701 transitions, 17593 flow [2021-06-10 16:15:48,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 34.583333333333336) internal successors, (415), 12 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:48,974 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:48,974 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:48,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-10 16:15:48,974 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:48,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:48,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1557406938, now seen corresponding path program 34 times [2021-06-10 16:15:48,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:48,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130773414] [2021-06-10 16:15:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:48,991 INFO L142 QuantifierPusher]: treesize reduction 16, result has 56.8 percent of original size [2021-06-10 16:15:48,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 16:15:49,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:49,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:49,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:49,011 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:49,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:49,014 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:49,016 INFO L142 QuantifierPusher]: treesize reduction 7, result has 58.8 percent of original size [2021-06-10 16:15:49,017 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:49,019 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:49,019 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 16:15:49,026 INFO L142 QuantifierPusher]: treesize reduction 7, result has 63.2 percent of original size [2021-06-10 16:15:49,027 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:15:49,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:49,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:49,041 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:49,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:49,050 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:49,050 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:49,058 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:49,058 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:49,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130773414] [2021-06-10 16:15:49,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:49,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 16:15:49,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502237929] [2021-06-10 16:15:49,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 16:15:49,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:49,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 16:15:49,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-10 16:15:49,060 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:49,060 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 701 transitions, 17593 flow. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:49,060 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:49,060 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:49,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:15:51,189 INFO L129 PetriNetUnfolder]: 1686/6458 cut-off events. [2021-06-10 16:15:51,190 INFO L130 PetriNetUnfolder]: For 257801/258733 co-relation queries the response was YES. [2021-06-10 16:15:51,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56588 conditions, 6458 events. 1686/6458 cut-off events. For 257801/258733 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 73795 event pairs, 640 based on Foata normal form. 151/6402 useless extension candidates. Maximal degree in co-relation 56442. Up to 3264 conditions per place. [2021-06-10 16:15:51,276 INFO L132 encePairwiseOnDemand]: 42/53 looper letters, 625 selfloop transitions, 36 changer transitions 11/725 dead transitions. [2021-06-10 16:15:51,276 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 725 transitions, 19536 flow [2021-06-10 16:15:51,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 16:15:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 16:15:51,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 328 transitions. [2021-06-10 16:15:51,277 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7735849056603774 [2021-06-10 16:15:51,277 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 328 transitions. [2021-06-10 16:15:51,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 328 transitions. [2021-06-10 16:15:51,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:15:51,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 328 transitions. [2021-06-10 16:15:51,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 41.0) internal successors, (328), 8 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:51,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:51,279 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:51,279 INFO L185 Difference]: Start difference. First operand has 411 places, 701 transitions, 17593 flow. Second operand 8 states and 328 transitions. [2021-06-10 16:15:51,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 725 transitions, 19536 flow [2021-06-10 16:15:52,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 725 transitions, 19219 flow, removed 26 selfloop flow, removed 10 redundant places. [2021-06-10 16:15:52,708 INFO L241 Difference]: Finished difference. Result has 411 places, 701 transitions, 17344 flow [2021-06-10 16:15:52,709 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=17276, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17344, PETRI_PLACES=411, PETRI_TRANSITIONS=701} [2021-06-10 16:15:52,709 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 353 predicate places. [2021-06-10 16:15:52,709 INFO L480 AbstractCegarLoop]: Abstraction has has 411 places, 701 transitions, 17344 flow [2021-06-10 16:15:52,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:52,709 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:52,709 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:52,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-10 16:15:52,710 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:52,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:52,710 INFO L82 PathProgramCache]: Analyzing trace with hash 867548394, now seen corresponding path program 35 times [2021-06-10 16:15:52,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:52,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567925335] [2021-06-10 16:15:52,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:52,730 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:52,730 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:52,736 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:52,737 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:52,742 INFO L142 QuantifierPusher]: treesize reduction 20, result has 51.2 percent of original size [2021-06-10 16:15:52,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 16:15:52,754 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:52,755 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 16:15:52,766 INFO L142 QuantifierPusher]: treesize reduction 27, result has 38.6 percent of original size [2021-06-10 16:15:52,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 16:15:52,767 INFO L142 QuantifierPusher]: treesize reduction 10, result has 67.7 percent of original size [2021-06-10 16:15:52,768 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 16:15:52,781 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-06-10 16:15:52,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 16:15:52,786 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-06-10 16:15:52,787 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 16:15:52,801 INFO L142 QuantifierPusher]: treesize reduction 12, result has 60.0 percent of original size [2021-06-10 16:15:52,802 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-06-10 16:15:52,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:52,820 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:52,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567925335] [2021-06-10 16:15:52,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:52,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:15:52,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127473320] [2021-06-10 16:15:52,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:15:52,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:52,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:15:52,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:15:52,822 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:52,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 701 transitions, 17344 flow. Second operand has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:52,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:52,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:52,822 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:15:54,994 INFO L129 PetriNetUnfolder]: 1517/5907 cut-off events. [2021-06-10 16:15:54,994 INFO L130 PetriNetUnfolder]: For 235662/236444 co-relation queries the response was YES. [2021-06-10 16:15:55,083 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51633 conditions, 5907 events. 1517/5907 cut-off events. For 235662/236444 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 67874 event pairs, 431 based on Foata normal form. 314/6022 useless extension candidates. Maximal degree in co-relation 51487. Up to 1115 conditions per place. [2021-06-10 16:15:55,099 INFO L132 encePairwiseOnDemand]: 39/53 looper letters, 234 selfloop transitions, 127 changer transitions 375/781 dead transitions. [2021-06-10 16:15:55,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 781 transitions, 20689 flow [2021-06-10 16:15:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-10 16:15:55,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-06-10 16:15:55,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 578 transitions. [2021-06-10 16:15:55,101 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7789757412398922 [2021-06-10 16:15:55,101 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 578 transitions. [2021-06-10 16:15:55,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 578 transitions. [2021-06-10 16:15:55,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:15:55,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 578 transitions. [2021-06-10 16:15:55,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 41.285714285714285) internal successors, (578), 14 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:55,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 53.0) internal successors, (795), 15 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:55,102 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 53.0) internal successors, (795), 15 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:55,102 INFO L185 Difference]: Start difference. First operand has 411 places, 701 transitions, 17344 flow. Second operand 14 states and 578 transitions. [2021-06-10 16:15:55,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 781 transitions, 20689 flow [2021-06-10 16:15:56,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 781 transitions, 20357 flow, removed 63 selfloop flow, removed 10 redundant places. [2021-06-10 16:15:56,632 INFO L241 Difference]: Finished difference. Result has 413 places, 377 transitions, 9392 flow [2021-06-10 16:15:56,633 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=15731, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9392, PETRI_PLACES=413, PETRI_TRANSITIONS=377} [2021-06-10 16:15:56,633 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 355 predicate places. [2021-06-10 16:15:56,633 INFO L480 AbstractCegarLoop]: Abstraction has has 413 places, 377 transitions, 9392 flow [2021-06-10 16:15:56,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:56,633 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:56,633 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:56,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-10 16:15:56,633 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:56,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:56,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1180035222, now seen corresponding path program 36 times [2021-06-10 16:15:56,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:56,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47239533] [2021-06-10 16:15:56,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:56,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:56,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:15:56,671 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:56,672 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:56,683 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:56,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:56,684 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:56,684 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:56,685 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:56,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 16:15:56,697 INFO L142 QuantifierPusher]: treesize reduction 7, result has 68.2 percent of original size [2021-06-10 16:15:56,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:15:56,710 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:56,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:15:56,721 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:56,721 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:15:56,732 INFO L142 QuantifierPusher]: treesize reduction 7, result has 70.8 percent of original size [2021-06-10 16:15:56,733 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 16:15:56,745 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:56,745 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-06-10 16:15:56,759 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:56,759 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:56,769 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:56,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:56,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47239533] [2021-06-10 16:15:56,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:56,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-06-10 16:15:56,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942255090] [2021-06-10 16:15:56,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-10 16:15:56,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:56,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-10 16:15:56,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-10 16:15:56,773 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:56,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 377 transitions, 9392 flow. Second operand has 11 states, 11 states have (on average 34.72727272727273) internal successors, (382), 11 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:56,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:56,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:56,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:15:57,985 INFO L129 PetriNetUnfolder]: 784/3113 cut-off events. [2021-06-10 16:15:57,985 INFO L130 PetriNetUnfolder]: For 130429/130759 co-relation queries the response was YES. [2021-06-10 16:15:58,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27916 conditions, 3113 events. 784/3113 cut-off events. For 130429/130759 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 30709 event pairs, 356 based on Foata normal form. 58/3042 useless extension candidates. Maximal degree in co-relation 27768. Up to 1490 conditions per place. [2021-06-10 16:15:58,022 INFO L132 encePairwiseOnDemand]: 41/53 looper letters, 320 selfloop transitions, 35 changer transitions 2/402 dead transitions. [2021-06-10 16:15:58,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 402 transitions, 10774 flow [2021-06-10 16:15:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 16:15:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 16:15:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 397 transitions. [2021-06-10 16:15:58,023 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7490566037735849 [2021-06-10 16:15:58,023 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 397 transitions. [2021-06-10 16:15:58,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 397 transitions. [2021-06-10 16:15:58,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:15:58,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 397 transitions. [2021-06-10 16:15:58,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 39.7) internal successors, (397), 10 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:58,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:58,024 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:58,024 INFO L185 Difference]: Start difference. First operand has 413 places, 377 transitions, 9392 flow. Second operand 10 states and 397 transitions. [2021-06-10 16:15:58,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 402 transitions, 10774 flow [2021-06-10 16:15:58,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 402 transitions, 9546 flow, removed 155 selfloop flow, removed 57 redundant places. [2021-06-10 16:15:58,496 INFO L241 Difference]: Finished difference. Result has 342 places, 382 transitions, 8505 flow [2021-06-10 16:15:58,496 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=8281, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8505, PETRI_PLACES=342, PETRI_TRANSITIONS=382} [2021-06-10 16:15:58,496 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 284 predicate places. [2021-06-10 16:15:58,497 INFO L480 AbstractCegarLoop]: Abstraction has has 342 places, 382 transitions, 8505 flow [2021-06-10 16:15:58,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 34.72727272727273) internal successors, (382), 11 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:58,497 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:58,497 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:58,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-10 16:15:58,497 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:58,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:58,497 INFO L82 PathProgramCache]: Analyzing trace with hash -871382368, now seen corresponding path program 37 times [2021-06-10 16:15:58,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:58,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958752954] [2021-06-10 16:15:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:58,514 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:58,514 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:58,520 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:58,520 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:58,525 INFO L142 QuantifierPusher]: treesize reduction 4, result has 81.0 percent of original size [2021-06-10 16:15:58,526 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 16:15:58,529 INFO L142 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-06-10 16:15:58,529 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:58,530 INFO L142 QuantifierPusher]: treesize reduction 6, result has 60.0 percent of original size [2021-06-10 16:15:58,530 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:58,536 INFO L142 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-06-10 16:15:58,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:58,543 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:58,544 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:58,550 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:58,550 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:58,557 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:58,557 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:58,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958752954] [2021-06-10 16:15:58,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:58,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 16:15:58,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376447327] [2021-06-10 16:15:58,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 16:15:58,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:58,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 16:15:58,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-10 16:15:58,558 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:58,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 382 transitions, 8505 flow. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:58,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:58,559 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:58,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:15:59,361 INFO L129 PetriNetUnfolder]: 799/3225 cut-off events. [2021-06-10 16:15:59,361 INFO L130 PetriNetUnfolder]: For 97840/98201 co-relation queries the response was YES. [2021-06-10 16:15:59,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25723 conditions, 3225 events. 799/3225 cut-off events. For 97840/98201 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 32151 event pairs, 349 based on Foata normal form. 76/3165 useless extension candidates. Maximal degree in co-relation 25604. Up to 1582 conditions per place. [2021-06-10 16:15:59,407 INFO L132 encePairwiseOnDemand]: 43/53 looper letters, 318 selfloop transitions, 11 changer transitions 54/428 dead transitions. [2021-06-10 16:15:59,407 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 428 transitions, 10210 flow [2021-06-10 16:15:59,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-10 16:15:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-10 16:15:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 357 transitions. [2021-06-10 16:15:59,408 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7484276729559748 [2021-06-10 16:15:59,408 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 357 transitions. [2021-06-10 16:15:59,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 357 transitions. [2021-06-10 16:15:59,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:15:59,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 357 transitions. [2021-06-10 16:15:59,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:59,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:59,409 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:59,409 INFO L185 Difference]: Start difference. First operand has 342 places, 382 transitions, 8505 flow. Second operand 9 states and 357 transitions. [2021-06-10 16:15:59,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 428 transitions, 10210 flow [2021-06-10 16:15:59,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 428 transitions, 10067 flow, removed 29 selfloop flow, removed 7 redundant places. [2021-06-10 16:15:59,846 INFO L241 Difference]: Finished difference. Result has 350 places, 365 transitions, 7991 flow [2021-06-10 16:15:59,846 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=8318, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7991, PETRI_PLACES=350, PETRI_TRANSITIONS=365} [2021-06-10 16:15:59,846 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 292 predicate places. [2021-06-10 16:15:59,846 INFO L480 AbstractCegarLoop]: Abstraction has has 350 places, 365 transitions, 7991 flow [2021-06-10 16:15:59,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:59,846 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:15:59,847 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:15:59,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-10 16:15:59,847 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:15:59,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:15:59,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1932109640, now seen corresponding path program 38 times [2021-06-10 16:15:59,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:15:59,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153068719] [2021-06-10 16:15:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:15:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:15:59,863 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:59,863 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:59,870 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:59,871 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-06-10 16:15:59,873 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:59,874 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:15:59,874 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:59,874 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:15:59,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:59,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 16:15:59,890 INFO L142 QuantifierPusher]: treesize reduction 7, result has 63.2 percent of original size [2021-06-10 16:15:59,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:15:59,898 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:59,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:59,905 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:59,906 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:15:59,915 INFO L142 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-06-10 16:15:59,916 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:59,923 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:59,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:59,932 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:59,932 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:15:59,942 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:15:59,943 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:15:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:15:59,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153068719] [2021-06-10 16:15:59,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:15:59,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-06-10 16:15:59,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914334496] [2021-06-10 16:15:59,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-10 16:15:59,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:15:59,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-10 16:15:59,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-10 16:15:59,945 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:15:59,945 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 365 transitions, 7991 flow. Second operand has 11 states, 11 states have (on average 34.72727272727273) internal successors, (382), 11 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:15:59,945 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:15:59,945 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:15:59,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:00,765 INFO L129 PetriNetUnfolder]: 729/2923 cut-off events. [2021-06-10 16:16:00,765 INFO L130 PetriNetUnfolder]: For 87785/88063 co-relation queries the response was YES. [2021-06-10 16:16:00,800 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23455 conditions, 2923 events. 729/2923 cut-off events. For 87785/88063 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 28379 event pairs, 327 based on Foata normal form. 47/2852 useless extension candidates. Maximal degree in co-relation 23330. Up to 1364 conditions per place. [2021-06-10 16:16:00,810 INFO L132 encePairwiseOnDemand]: 43/53 looper letters, 296 selfloop transitions, 22 changer transitions 13/376 dead transitions. [2021-06-10 16:16:00,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 376 transitions, 8879 flow [2021-06-10 16:16:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 16:16:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 16:16:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 318 transitions. [2021-06-10 16:16:00,813 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-06-10 16:16:00,813 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 318 transitions. [2021-06-10 16:16:00,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 318 transitions. [2021-06-10 16:16:00,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:00,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 318 transitions. [2021-06-10 16:16:00,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 39.75) internal successors, (318), 8 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:00,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:00,815 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:00,815 INFO L185 Difference]: Start difference. First operand has 350 places, 365 transitions, 7991 flow. Second operand 8 states and 318 transitions. [2021-06-10 16:16:00,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 376 transitions, 8879 flow [2021-06-10 16:16:01,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 376 transitions, 8765 flow, removed 27 selfloop flow, removed 14 redundant places. [2021-06-10 16:16:01,182 INFO L241 Difference]: Finished difference. Result has 336 places, 354 transitions, 7701 flow [2021-06-10 16:16:01,182 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=7774, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7701, PETRI_PLACES=336, PETRI_TRANSITIONS=354} [2021-06-10 16:16:01,182 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 278 predicate places. [2021-06-10 16:16:01,182 INFO L480 AbstractCegarLoop]: Abstraction has has 336 places, 354 transitions, 7701 flow [2021-06-10 16:16:01,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 34.72727272727273) internal successors, (382), 11 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:01,183 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:01,183 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:01,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-06-10 16:16:01,183 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:01,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:01,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1645192310, now seen corresponding path program 39 times [2021-06-10 16:16:01,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:01,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812191288] [2021-06-10 16:16:01,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:01,197 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:01,198 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 16:16:01,200 INFO L142 QuantifierPusher]: treesize reduction 4, result has 73.3 percent of original size [2021-06-10 16:16:01,201 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 16:16:01,203 INFO L142 QuantifierPusher]: treesize reduction 29, result has 34.1 percent of original size [2021-06-10 16:16:01,204 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:16:01,214 INFO L142 QuantifierPusher]: treesize reduction 4, result has 81.0 percent of original size [2021-06-10 16:16:01,215 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 16:16:01,227 INFO L142 QuantifierPusher]: treesize reduction 11, result has 57.7 percent of original size [2021-06-10 16:16:01,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:16:01,240 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:01,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-06-10 16:16:01,254 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:01,254 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:01,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812191288] [2021-06-10 16:16:01,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:01,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-10 16:16:01,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16849006] [2021-06-10 16:16:01,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-10 16:16:01,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:01,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-10 16:16:01,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-10 16:16:01,256 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 53 [2021-06-10 16:16:01,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 354 transitions, 7701 flow. Second operand has 7 states, 7 states have (on average 37.42857142857143) internal successors, (262), 7 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:01,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:01,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 53 [2021-06-10 16:16:01,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:01,864 INFO L129 PetriNetUnfolder]: 718/2896 cut-off events. [2021-06-10 16:16:01,864 INFO L130 PetriNetUnfolder]: For 86300/86574 co-relation queries the response was YES. [2021-06-10 16:16:01,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22767 conditions, 2896 events. 718/2896 cut-off events. For 86300/86574 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 28230 event pairs, 229 based on Foata normal form. 70/2849 useless extension candidates. Maximal degree in co-relation 22651. Up to 758 conditions per place. [2021-06-10 16:16:01,968 INFO L132 encePairwiseOnDemand]: 45/53 looper letters, 201 selfloop transitions, 70 changer transitions 36/397 dead transitions. [2021-06-10 16:16:01,968 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 397 transitions, 9230 flow [2021-06-10 16:16:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-10 16:16:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-10 16:16:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 301 transitions. [2021-06-10 16:16:01,969 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8113207547169812 [2021-06-10 16:16:01,969 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 301 transitions. [2021-06-10 16:16:01,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 301 transitions. [2021-06-10 16:16:01,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:01,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 301 transitions. [2021-06-10 16:16:01,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 43.0) internal successors, (301), 7 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:01,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 53.0) internal successors, (424), 8 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:01,970 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 53.0) internal successors, (424), 8 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:01,970 INFO L185 Difference]: Start difference. First operand has 336 places, 354 transitions, 7701 flow. Second operand 7 states and 301 transitions. [2021-06-10 16:16:01,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 397 transitions, 9230 flow [2021-06-10 16:16:02,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 397 transitions, 9090 flow, removed 31 selfloop flow, removed 14 redundant places. [2021-06-10 16:16:02,261 INFO L241 Difference]: Finished difference. Result has 326 places, 346 transitions, 7778 flow [2021-06-10 16:16:02,262 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=7600, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7778, PETRI_PLACES=326, PETRI_TRANSITIONS=346} [2021-06-10 16:16:02,262 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 268 predicate places. [2021-06-10 16:16:02,262 INFO L480 AbstractCegarLoop]: Abstraction has has 326 places, 346 transitions, 7778 flow [2021-06-10 16:16:02,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 37.42857142857143) internal successors, (262), 7 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:02,262 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:02,262 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:02,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-06-10 16:16:02,262 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:02,262 INFO L82 PathProgramCache]: Analyzing trace with hash 92994780, now seen corresponding path program 40 times [2021-06-10 16:16:02,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:02,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602479812] [2021-06-10 16:16:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:02,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:02,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:02,285 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:02,285 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:02,285 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:02,286 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:02,286 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:02,286 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 16:16:02,293 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:02,293 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:02,301 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:02,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:02,302 INFO L142 QuantifierPusher]: treesize reduction 21, result has 32.3 percent of original size [2021-06-10 16:16:02,302 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:02,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:02,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:02,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:02,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 16:16:02,326 INFO L142 QuantifierPusher]: treesize reduction 9, result has 57.1 percent of original size [2021-06-10 16:16:02,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:02,335 INFO L142 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-06-10 16:16:02,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:02,335 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:02,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:02,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602479812] [2021-06-10 16:16:02,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:02,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:16:02,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396382441] [2021-06-10 16:16:02,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:16:02,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:02,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:16:02,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:16:02,336 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:16:02,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 346 transitions, 7778 flow. Second operand has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:02,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:02,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:16:02,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:02,936 INFO L129 PetriNetUnfolder]: 650/2628 cut-off events. [2021-06-10 16:16:02,937 INFO L130 PetriNetUnfolder]: For 79629/79910 co-relation queries the response was YES. [2021-06-10 16:16:02,965 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21133 conditions, 2628 events. 650/2628 cut-off events. For 79629/79910 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 25042 event pairs, 298 based on Foata normal form. 46/2568 useless extension candidates. Maximal degree in co-relation 21018. Up to 1262 conditions per place. [2021-06-10 16:16:02,973 INFO L132 encePairwiseOnDemand]: 44/53 looper letters, 279 selfloop transitions, 18 changer transitions 22/364 dead transitions. [2021-06-10 16:16:02,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 364 transitions, 8764 flow [2021-06-10 16:16:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-10 16:16:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-10 16:16:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 361 transitions. [2021-06-10 16:16:02,974 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7568134171907757 [2021-06-10 16:16:02,974 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 361 transitions. [2021-06-10 16:16:02,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 361 transitions. [2021-06-10 16:16:02,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:02,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 361 transitions. [2021-06-10 16:16:02,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 40.111111111111114) internal successors, (361), 9 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:02,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:02,975 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:02,975 INFO L185 Difference]: Start difference. First operand has 326 places, 346 transitions, 7778 flow. Second operand 9 states and 361 transitions. [2021-06-10 16:16:02,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 364 transitions, 8764 flow [2021-06-10 16:16:03,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 364 transitions, 8661 flow, removed 14 selfloop flow, removed 8 redundant places. [2021-06-10 16:16:03,273 INFO L241 Difference]: Finished difference. Result has 326 places, 333 transitions, 7445 flow [2021-06-10 16:16:03,273 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=7617, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7445, PETRI_PLACES=326, PETRI_TRANSITIONS=333} [2021-06-10 16:16:03,273 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 268 predicate places. [2021-06-10 16:16:03,274 INFO L480 AbstractCegarLoop]: Abstraction has has 326 places, 333 transitions, 7445 flow [2021-06-10 16:16:03,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:03,274 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:03,274 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:03,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-10 16:16:03,274 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:03,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:03,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1719926556, now seen corresponding path program 41 times [2021-06-10 16:16:03,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:03,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667746372] [2021-06-10 16:16:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:03,291 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:03,291 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:03,343 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:03,343 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:03,343 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:03,344 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:03,344 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:03,346 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 16:16:03,358 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:03,359 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:03,369 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:03,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:03,369 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:03,370 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 16:16:03,378 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:03,378 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:16:03,387 INFO L142 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-06-10 16:16:03,387 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:03,396 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:03,396 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:16:03,409 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:03,409 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:03,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667746372] [2021-06-10 16:16:03,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:03,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:16:03,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674077117] [2021-06-10 16:16:03,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:16:03,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:03,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:16:03,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:16:03,411 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:16:03,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 333 transitions, 7445 flow. Second operand has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:03,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:03,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:16:03,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:04,027 INFO L129 PetriNetUnfolder]: 616/2456 cut-off events. [2021-06-10 16:16:04,027 INFO L130 PetriNetUnfolder]: For 73662/73934 co-relation queries the response was YES. [2021-06-10 16:16:04,052 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19861 conditions, 2456 events. 616/2456 cut-off events. For 73662/73934 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 22933 event pairs, 285 based on Foata normal form. 49/2401 useless extension candidates. Maximal degree in co-relation 19749. Up to 1197 conditions per place. [2021-06-10 16:16:04,059 INFO L132 encePairwiseOnDemand]: 43/53 looper letters, 274 selfloop transitions, 23 changer transitions 13/355 dead transitions. [2021-06-10 16:16:04,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 355 transitions, 8506 flow [2021-06-10 16:16:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-10 16:16:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-10 16:16:04,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 364 transitions. [2021-06-10 16:16:04,060 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7631027253668763 [2021-06-10 16:16:04,060 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 364 transitions. [2021-06-10 16:16:04,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 364 transitions. [2021-06-10 16:16:04,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:04,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 364 transitions. [2021-06-10 16:16:04,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 40.44444444444444) internal successors, (364), 9 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:04,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:04,061 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:04,061 INFO L185 Difference]: Start difference. First operand has 326 places, 333 transitions, 7445 flow. Second operand 9 states and 364 transitions. [2021-06-10 16:16:04,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 355 transitions, 8506 flow [2021-06-10 16:16:04,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 355 transitions, 8233 flow, removed 34 selfloop flow, removed 10 redundant places. [2021-06-10 16:16:04,306 INFO L241 Difference]: Finished difference. Result has 321 places, 326 transitions, 7073 flow [2021-06-10 16:16:04,306 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=7070, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7073, PETRI_PLACES=321, PETRI_TRANSITIONS=326} [2021-06-10 16:16:04,306 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 263 predicate places. [2021-06-10 16:16:04,306 INFO L480 AbstractCegarLoop]: Abstraction has has 321 places, 326 transitions, 7073 flow [2021-06-10 16:16:04,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:04,306 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:04,306 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:04,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-10 16:16:04,307 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:04,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:04,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1459022992, now seen corresponding path program 42 times [2021-06-10 16:16:04,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:04,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511203968] [2021-06-10 16:16:04,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:04,326 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:04,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:04,336 INFO L142 QuantifierPusher]: treesize reduction 24, result has 46.7 percent of original size [2021-06-10 16:16:04,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 16:16:04,352 INFO L142 QuantifierPusher]: treesize reduction 23, result has 39.5 percent of original size [2021-06-10 16:16:04,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:16:04,368 INFO L142 QuantifierPusher]: treesize reduction 8, result has 65.2 percent of original size [2021-06-10 16:16:04,368 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:16:04,384 INFO L142 QuantifierPusher]: treesize reduction 27, result has 28.9 percent of original size [2021-06-10 16:16:04,384 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 16:16:04,397 INFO L142 QuantifierPusher]: treesize reduction 13, result has 50.0 percent of original size [2021-06-10 16:16:04,397 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:04,411 INFO L142 QuantifierPusher]: treesize reduction 11, result has 50.0 percent of original size [2021-06-10 16:16:04,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 16:16:04,423 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:04,424 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:04,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511203968] [2021-06-10 16:16:04,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:04,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:16:04,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251136697] [2021-06-10 16:16:04,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:16:04,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:04,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:16:04,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:16:04,425 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:16:04,425 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 326 transitions, 7073 flow. Second operand has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:04,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:04,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:16:04,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:05,045 INFO L129 PetriNetUnfolder]: 654/2614 cut-off events. [2021-06-10 16:16:05,045 INFO L130 PetriNetUnfolder]: For 74060/74350 co-relation queries the response was YES. [2021-06-10 16:16:05,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20440 conditions, 2614 events. 654/2614 cut-off events. For 74060/74350 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 24648 event pairs, 286 based on Foata normal form. 64/2574 useless extension candidates. Maximal degree in co-relation 20333. Up to 772 conditions per place. [2021-06-10 16:16:05,080 INFO L132 encePairwiseOnDemand]: 41/53 looper letters, 204 selfloop transitions, 130 changer transitions 13/392 dead transitions. [2021-06-10 16:16:05,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 392 transitions, 9140 flow [2021-06-10 16:16:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 16:16:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 16:16:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 409 transitions. [2021-06-10 16:16:05,081 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7716981132075472 [2021-06-10 16:16:05,081 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 409 transitions. [2021-06-10 16:16:05,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 409 transitions. [2021-06-10 16:16:05,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:05,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 409 transitions. [2021-06-10 16:16:05,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 40.9) internal successors, (409), 10 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:05,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:05,082 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:05,082 INFO L185 Difference]: Start difference. First operand has 321 places, 326 transitions, 7073 flow. Second operand 10 states and 409 transitions. [2021-06-10 16:16:05,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 392 transitions, 9140 flow [2021-06-10 16:16:05,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 392 transitions, 9014 flow, removed 13 selfloop flow, removed 7 redundant places. [2021-06-10 16:16:05,349 INFO L241 Difference]: Finished difference. Result has 327 places, 342 transitions, 7681 flow [2021-06-10 16:16:05,349 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=6965, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7681, PETRI_PLACES=327, PETRI_TRANSITIONS=342} [2021-06-10 16:16:05,349 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 269 predicate places. [2021-06-10 16:16:05,350 INFO L480 AbstractCegarLoop]: Abstraction has has 327 places, 342 transitions, 7681 flow [2021-06-10 16:16:05,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:05,350 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:05,350 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:05,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-06-10 16:16:05,350 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:05,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:05,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1434939558, now seen corresponding path program 43 times [2021-06-10 16:16:05,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:05,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541158129] [2021-06-10 16:16:05,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:05,374 INFO L142 QuantifierPusher]: treesize reduction 27, result has 51.8 percent of original size [2021-06-10 16:16:05,375 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-06-10 16:16:05,391 INFO L142 QuantifierPusher]: treesize reduction 3, result has 84.2 percent of original size [2021-06-10 16:16:05,392 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:16:05,394 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:05,395 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:16:05,397 INFO L142 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-06-10 16:16:05,397 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:05,405 INFO L142 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-06-10 16:16:05,406 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:05,415 INFO L142 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size [2021-06-10 16:16:05,416 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-06-10 16:16:05,448 INFO L142 QuantifierPusher]: treesize reduction 21, result has 41.7 percent of original size [2021-06-10 16:16:05,449 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:16:05,466 INFO L142 QuantifierPusher]: treesize reduction 19, result has 40.6 percent of original size [2021-06-10 16:16:05,467 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:05,483 INFO L142 QuantifierPusher]: treesize reduction 11, result has 38.9 percent of original size [2021-06-10 16:16:05,483 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:05,492 INFO L142 QuantifierPusher]: treesize reduction 4, result has 85.2 percent of original size [2021-06-10 16:16:05,493 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 16:16:05,512 INFO L142 QuantifierPusher]: treesize reduction 6, result has 68.4 percent of original size [2021-06-10 16:16:05,512 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:05,526 INFO L142 QuantifierPusher]: treesize reduction 8, result has 46.7 percent of original size [2021-06-10 16:16:05,526 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:05,537 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:05,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:05,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541158129] [2021-06-10 16:16:05,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:05,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-06-10 16:16:05,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514020486] [2021-06-10 16:16:05,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-10 16:16:05,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:05,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-10 16:16:05,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-10 16:16:05,540 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:16:05,540 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 342 transitions, 7681 flow. Second operand has 12 states, 12 states have (on average 34.583333333333336) internal successors, (415), 12 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:05,540 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:05,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:16:05,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:06,227 INFO L129 PetriNetUnfolder]: 662/2669 cut-off events. [2021-06-10 16:16:06,227 INFO L130 PetriNetUnfolder]: For 80264/80570 co-relation queries the response was YES. [2021-06-10 16:16:06,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21136 conditions, 2669 events. 662/2669 cut-off events. For 80264/80570 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25400 event pairs, 321 based on Foata normal form. 42/2598 useless extension candidates. Maximal degree in co-relation 21026. Up to 1386 conditions per place. [2021-06-10 16:16:06,262 INFO L132 encePairwiseOnDemand]: 41/53 looper letters, 289 selfloop transitions, 13 changer transitions 24/371 dead transitions. [2021-06-10 16:16:06,262 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 371 transitions, 8896 flow [2021-06-10 16:16:06,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 16:16:06,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 16:16:06,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 385 transitions. [2021-06-10 16:16:06,263 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7264150943396226 [2021-06-10 16:16:06,263 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 385 transitions. [2021-06-10 16:16:06,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 385 transitions. [2021-06-10 16:16:06,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:06,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 385 transitions. [2021-06-10 16:16:06,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 38.5) internal successors, (385), 10 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:06,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:06,264 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:06,264 INFO L185 Difference]: Start difference. First operand has 327 places, 342 transitions, 7681 flow. Second operand 10 states and 385 transitions. [2021-06-10 16:16:06,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 371 transitions, 8896 flow [2021-06-10 16:16:06,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 371 transitions, 8795 flow, removed 40 selfloop flow, removed 1 redundant places. [2021-06-10 16:16:06,547 INFO L241 Difference]: Finished difference. Result has 341 places, 343 transitions, 7696 flow [2021-06-10 16:16:06,547 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=7610, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7696, PETRI_PLACES=341, PETRI_TRANSITIONS=343} [2021-06-10 16:16:06,548 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 283 predicate places. [2021-06-10 16:16:06,548 INFO L480 AbstractCegarLoop]: Abstraction has has 341 places, 343 transitions, 7696 flow [2021-06-10 16:16:06,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 34.583333333333336) internal successors, (415), 12 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:06,548 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:06,548 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:06,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-10 16:16:06,548 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:06,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:06,549 INFO L82 PathProgramCache]: Analyzing trace with hash -553927452, now seen corresponding path program 44 times [2021-06-10 16:16:06,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:06,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181167339] [2021-06-10 16:16:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:06,565 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:06,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-06-10 16:16:06,579 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:06,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:16:06,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:06,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-06-10 16:16:06,592 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:06,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:06,600 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:06,601 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:06,609 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:06,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:06,619 INFO L142 QuantifierPusher]: treesize reduction 7, result has 58.8 percent of original size [2021-06-10 16:16:06,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:06,628 INFO L142 QuantifierPusher]: treesize reduction 7, result has 58.8 percent of original size [2021-06-10 16:16:06,628 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:06,639 INFO L142 QuantifierPusher]: treesize reduction 7, result has 68.2 percent of original size [2021-06-10 16:16:06,639 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:16:06,652 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:06,653 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:16:06,663 INFO L142 QuantifierPusher]: treesize reduction 4, result has 75.0 percent of original size [2021-06-10 16:16:06,663 INFO L147 QuantifierPusher]: treesize reduction 4, result has 66.7 percent of original size 8 [2021-06-10 16:16:06,677 INFO L142 QuantifierPusher]: treesize reduction 4, result has 75.0 percent of original size [2021-06-10 16:16:06,678 INFO L147 QuantifierPusher]: treesize reduction 4, result has 66.7 percent of original size 8 [2021-06-10 16:16:06,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:06,693 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:06,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181167339] [2021-06-10 16:16:06,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:06,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-06-10 16:16:06,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907423227] [2021-06-10 16:16:06,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-10 16:16:06,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:06,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-10 16:16:06,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-10 16:16:06,694 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:16:06,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 343 transitions, 7696 flow. Second operand has 13 states, 13 states have (on average 34.46153846153846) internal successors, (448), 13 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:06,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:06,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:16:06,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:07,438 INFO L129 PetriNetUnfolder]: 627/2474 cut-off events. [2021-06-10 16:16:07,439 INFO L130 PetriNetUnfolder]: For 74395/74666 co-relation queries the response was YES. [2021-06-10 16:16:07,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19665 conditions, 2474 events. 627/2474 cut-off events. For 74395/74666 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 23131 event pairs, 289 based on Foata normal form. 52/2419 useless extension candidates. Maximal degree in co-relation 19549. Up to 1208 conditions per place. [2021-06-10 16:16:07,474 INFO L132 encePairwiseOnDemand]: 41/53 looper letters, 249 selfloop transitions, 7 changer transitions 53/352 dead transitions. [2021-06-10 16:16:07,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 352 transitions, 8396 flow [2021-06-10 16:16:07,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-10 16:16:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-06-10 16:16:07,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 462 transitions. [2021-06-10 16:16:07,475 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7264150943396226 [2021-06-10 16:16:07,475 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 462 transitions. [2021-06-10 16:16:07,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 462 transitions. [2021-06-10 16:16:07,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:07,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 462 transitions. [2021-06-10 16:16:07,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 38.5) internal successors, (462), 12 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) [2021-06-10 16:16:07,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:07,476 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:07,477 INFO L185 Difference]: Start difference. First operand has 341 places, 343 transitions, 7696 flow. Second operand 12 states and 462 transitions. [2021-06-10 16:16:07,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 352 transitions, 8396 flow [2021-06-10 16:16:07,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 352 transitions, 8153 flow, removed 29 selfloop flow, removed 14 redundant places. [2021-06-10 16:16:07,743 INFO L241 Difference]: Finished difference. Result has 335 places, 296 transitions, 6477 flow [2021-06-10 16:16:07,743 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=7162, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6477, PETRI_PLACES=335, PETRI_TRANSITIONS=296} [2021-06-10 16:16:07,743 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 277 predicate places. [2021-06-10 16:16:07,743 INFO L480 AbstractCegarLoop]: Abstraction has has 335 places, 296 transitions, 6477 flow [2021-06-10 16:16:07,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 34.46153846153846) internal successors, (448), 13 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:07,744 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:07,744 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:07,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-10 16:16:07,744 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:07,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:07,744 INFO L82 PathProgramCache]: Analyzing trace with hash -958262138, now seen corresponding path program 45 times [2021-06-10 16:16:07,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:07,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730488202] [2021-06-10 16:16:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:07,760 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:07,760 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:07,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:07,771 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:07,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:07,771 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:07,772 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:07,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 16:16:07,783 INFO L142 QuantifierPusher]: treesize reduction 4, result has 78.9 percent of original size [2021-06-10 16:16:07,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:16:07,796 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:07,796 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:07,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:07,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:07,816 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:07,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:07,825 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:07,825 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:16:07,833 INFO L142 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-06-10 16:16:07,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:07,842 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:07,843 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:16:07,852 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:07,852 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:07,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730488202] [2021-06-10 16:16:07,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:07,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-06-10 16:16:07,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992470555] [2021-06-10 16:16:07,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-10 16:16:07,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:07,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-10 16:16:07,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-10 16:16:07,854 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:16:07,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 296 transitions, 6477 flow. Second operand has 11 states, 11 states have (on average 34.72727272727273) internal successors, (382), 11 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:07,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:07,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:16:07,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:08,394 INFO L129 PetriNetUnfolder]: 583/2256 cut-off events. [2021-06-10 16:16:08,395 INFO L130 PetriNetUnfolder]: For 67924/68165 co-relation queries the response was YES. [2021-06-10 16:16:08,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18004 conditions, 2256 events. 583/2256 cut-off events. For 67924/68165 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 20523 event pairs, 268 based on Foata normal form. 40/2209 useless extension candidates. Maximal degree in co-relation 17896. Up to 1159 conditions per place. [2021-06-10 16:16:08,425 INFO L132 encePairwiseOnDemand]: 43/53 looper letters, 240 selfloop transitions, 8 changer transitions 21/311 dead transitions. [2021-06-10 16:16:08,425 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 311 transitions, 7367 flow [2021-06-10 16:16:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 16:16:08,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 16:16:08,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 380 transitions. [2021-06-10 16:16:08,426 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7169811320754716 [2021-06-10 16:16:08,426 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 380 transitions. [2021-06-10 16:16:08,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 380 transitions. [2021-06-10 16:16:08,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:08,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 380 transitions. [2021-06-10 16:16:08,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 38.0) internal successors, (380), 10 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:08,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:08,427 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:08,427 INFO L185 Difference]: Start difference. First operand has 335 places, 296 transitions, 6477 flow. Second operand 10 states and 380 transitions. [2021-06-10 16:16:08,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 311 transitions, 7367 flow [2021-06-10 16:16:08,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 311 transitions, 6685 flow, removed 54 selfloop flow, removed 34 redundant places. [2021-06-10 16:16:08,620 INFO L241 Difference]: Finished difference. Result has 286 places, 286 transitions, 5706 flow [2021-06-10 16:16:08,621 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5842, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5706, PETRI_PLACES=286, PETRI_TRANSITIONS=286} [2021-06-10 16:16:08,621 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 228 predicate places. [2021-06-10 16:16:08,621 INFO L480 AbstractCegarLoop]: Abstraction has has 286 places, 286 transitions, 5706 flow [2021-06-10 16:16:08,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 34.72727272727273) internal successors, (382), 11 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:08,621 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:08,621 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:08,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-10 16:16:08,621 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:08,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:08,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1442482208, now seen corresponding path program 46 times [2021-06-10 16:16:08,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:08,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451386409] [2021-06-10 16:16:08,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:08,635 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:08,636 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:08,646 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:08,646 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:08,647 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:08,647 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:08,648 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:08,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 16:16:08,659 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:08,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:08,668 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:08,669 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:08,675 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:08,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:08,684 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:08,684 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:08,693 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:08,694 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:08,702 INFO L142 QuantifierPusher]: treesize reduction 11, result has 50.0 percent of original size [2021-06-10 16:16:08,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-10 16:16:08,708 INFO L142 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-06-10 16:16:08,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:08,718 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:08,718 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:16:08,727 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:08,728 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:08,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451386409] [2021-06-10 16:16:08,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:08,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-06-10 16:16:08,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632880624] [2021-06-10 16:16:08,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-10 16:16:08,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:08,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-10 16:16:08,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-10 16:16:08,729 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:16:08,729 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 286 transitions, 5706 flow. Second operand has 11 states, 11 states have (on average 34.72727272727273) internal successors, (382), 11 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:08,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:08,729 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:16:08,730 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:09,192 INFO L129 PetriNetUnfolder]: 548/2108 cut-off events. [2021-06-10 16:16:09,192 INFO L130 PetriNetUnfolder]: For 52368/52596 co-relation queries the response was YES. [2021-06-10 16:16:09,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15906 conditions, 2108 events. 548/2108 cut-off events. For 52368/52596 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18791 event pairs, 253 based on Foata normal form. 30/2055 useless extension candidates. Maximal degree in co-relation 15813. Up to 1090 conditions per place. [2021-06-10 16:16:09,217 INFO L132 encePairwiseOnDemand]: 43/53 looper letters, 238 selfloop transitions, 11 changer transitions 4/295 dead transitions. [2021-06-10 16:16:09,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 295 transitions, 6412 flow [2021-06-10 16:16:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 16:16:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 16:16:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 376 transitions. [2021-06-10 16:16:09,218 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7094339622641509 [2021-06-10 16:16:09,218 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 376 transitions. [2021-06-10 16:16:09,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 376 transitions. [2021-06-10 16:16:09,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:09,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 376 transitions. [2021-06-10 16:16:09,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 37.6) internal successors, (376), 10 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:09,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:09,219 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:09,219 INFO L185 Difference]: Start difference. First operand has 286 places, 286 transitions, 5706 flow. Second operand 10 states and 376 transitions. [2021-06-10 16:16:09,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 295 transitions, 6412 flow [2021-06-10 16:16:09,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 295 transitions, 6069 flow, removed 42 selfloop flow, removed 22 redundant places. [2021-06-10 16:16:09,392 INFO L241 Difference]: Finished difference. Result has 261 places, 286 transitions, 5414 flow [2021-06-10 16:16:09,392 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5385, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5414, PETRI_PLACES=261, PETRI_TRANSITIONS=286} [2021-06-10 16:16:09,392 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 203 predicate places. [2021-06-10 16:16:09,392 INFO L480 AbstractCegarLoop]: Abstraction has has 261 places, 286 transitions, 5414 flow [2021-06-10 16:16:09,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 34.72727272727273) internal successors, (382), 11 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:09,392 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:09,392 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:09,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-10 16:16:09,392 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:09,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1200363730, now seen corresponding path program 47 times [2021-06-10 16:16:09,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:09,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856866833] [2021-06-10 16:16:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:09,406 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:09,407 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:09,417 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:09,418 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:09,418 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:09,418 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:09,419 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:09,419 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-06-10 16:16:09,431 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:09,431 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:09,440 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:09,441 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:09,441 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:09,441 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:09,450 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:09,450 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:09,459 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:09,460 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:16:09,468 INFO L142 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-06-10 16:16:09,468 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:09,477 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:09,477 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:16:09,487 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:09,487 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:09,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856866833] [2021-06-10 16:16:09,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:09,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-10 16:16:09,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657338413] [2021-06-10 16:16:09,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-10 16:16:09,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:09,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-10 16:16:09,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-10 16:16:09,489 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:16:09,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 286 transitions, 5414 flow. Second operand has 10 states, 10 states have (on average 34.9) internal successors, (349), 10 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:09,489 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:09,489 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:16:09,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:09,942 INFO L129 PetriNetUnfolder]: 545/2050 cut-off events. [2021-06-10 16:16:09,942 INFO L130 PetriNetUnfolder]: For 44121/44345 co-relation queries the response was YES. [2021-06-10 16:16:09,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14554 conditions, 2050 events. 545/2050 cut-off events. For 44121/44345 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18247 event pairs, 253 based on Foata normal form. 31/1998 useless extension candidates. Maximal degree in co-relation 14472. Up to 1083 conditions per place. [2021-06-10 16:16:09,961 INFO L132 encePairwiseOnDemand]: 45/53 looper letters, 224 selfloop transitions, 2 changer transitions 24/283 dead transitions. [2021-06-10 16:16:09,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 283 transitions, 5901 flow [2021-06-10 16:16:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-10 16:16:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-10 16:16:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 337 transitions. [2021-06-10 16:16:09,962 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7064989517819706 [2021-06-10 16:16:09,963 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 337 transitions. [2021-06-10 16:16:09,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 337 transitions. [2021-06-10 16:16:09,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:09,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 337 transitions. [2021-06-10 16:16:09,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 37.44444444444444) internal successors, (337), 9 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:09,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:09,964 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:09,964 INFO L185 Difference]: Start difference. First operand has 261 places, 286 transitions, 5414 flow. Second operand 9 states and 337 transitions. [2021-06-10 16:16:09,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 283 transitions, 5901 flow [2021-06-10 16:16:10,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 283 transitions, 5529 flow, removed 8 selfloop flow, removed 17 redundant places. [2021-06-10 16:16:10,102 INFO L241 Difference]: Finished difference. Result has 246 places, 259 transitions, 4739 flow [2021-06-10 16:16:10,102 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4905, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4739, PETRI_PLACES=246, PETRI_TRANSITIONS=259} [2021-06-10 16:16:10,102 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 188 predicate places. [2021-06-10 16:16:10,102 INFO L480 AbstractCegarLoop]: Abstraction has has 246 places, 259 transitions, 4739 flow [2021-06-10 16:16:10,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 34.9) internal successors, (349), 10 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:10,102 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:10,102 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:10,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-10 16:16:10,102 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:10,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:10,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2039565080, now seen corresponding path program 48 times [2021-06-10 16:16:10,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:10,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487093869] [2021-06-10 16:16:10,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:10,125 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:10,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:10,131 INFO L142 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-06-10 16:16:10,132 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:10,134 INFO L142 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-06-10 16:16:10,134 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:10,136 INFO L142 QuantifierPusher]: treesize reduction 21, result has 56.3 percent of original size [2021-06-10 16:16:10,137 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-06-10 16:16:10,164 INFO L142 QuantifierPusher]: treesize reduction 7, result has 86.8 percent of original size [2021-06-10 16:16:10,165 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-06-10 16:16:10,200 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:10,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-06-10 16:16:10,233 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:10,234 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-06-10 16:16:10,263 INFO L142 QuantifierPusher]: treesize reduction 10, result has 47.4 percent of original size [2021-06-10 16:16:10,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:16:10,275 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:10,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:10,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487093869] [2021-06-10 16:16:10,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:10,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 16:16:10,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136052540] [2021-06-10 16:16:10,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 16:16:10,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:10,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 16:16:10,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-10 16:16:10,277 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:16:10,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 259 transitions, 4739 flow. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:10,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:10,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:16:10,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:10,767 INFO L129 PetriNetUnfolder]: 513/1956 cut-off events. [2021-06-10 16:16:10,767 INFO L130 PetriNetUnfolder]: For 37715/37867 co-relation queries the response was YES. [2021-06-10 16:16:10,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13585 conditions, 1956 events. 513/1956 cut-off events. For 37715/37867 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17366 event pairs, 121 based on Foata normal form. 79/1970 useless extension candidates. Maximal degree in co-relation 13507. Up to 560 conditions per place. [2021-06-10 16:16:10,786 INFO L132 encePairwiseOnDemand]: 40/53 looper letters, 113 selfloop transitions, 71 changer transitions 86/303 dead transitions. [2021-06-10 16:16:10,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 303 transitions, 6161 flow [2021-06-10 16:16:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-10 16:16:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-06-10 16:16:10,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 468 transitions. [2021-06-10 16:16:10,787 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7358490566037735 [2021-06-10 16:16:10,787 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 468 transitions. [2021-06-10 16:16:10,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 468 transitions. [2021-06-10 16:16:10,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:10,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 468 transitions. [2021-06-10 16:16:10,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 39.0) internal successors, (468), 12 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:10,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:10,788 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:10,788 INFO L185 Difference]: Start difference. First operand has 246 places, 259 transitions, 4739 flow. Second operand 12 states and 468 transitions. [2021-06-10 16:16:10,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 303 transitions, 6161 flow [2021-06-10 16:16:10,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 303 transitions, 6015 flow, removed 18 selfloop flow, removed 16 redundant places. [2021-06-10 16:16:10,906 INFO L241 Difference]: Finished difference. Result has 229 places, 199 transitions, 3559 flow [2021-06-10 16:16:10,906 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4524, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3559, PETRI_PLACES=229, PETRI_TRANSITIONS=199} [2021-06-10 16:16:10,906 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 171 predicate places. [2021-06-10 16:16:10,906 INFO L480 AbstractCegarLoop]: Abstraction has has 229 places, 199 transitions, 3559 flow [2021-06-10 16:16:10,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:10,906 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:10,906 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:10,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-06-10 16:16:10,906 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:10,907 INFO L82 PathProgramCache]: Analyzing trace with hash -551627994, now seen corresponding path program 49 times [2021-06-10 16:16:10,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:10,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294115708] [2021-06-10 16:16:10,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:10,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:10,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:10,934 INFO L142 QuantifierPusher]: treesize reduction 3, result has 76.9 percent of original size [2021-06-10 16:16:10,935 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:10,937 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:10,937 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:10,939 INFO L142 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size [2021-06-10 16:16:10,940 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 16:16:10,949 INFO L142 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-06-10 16:16:10,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:10,955 INFO L142 QuantifierPusher]: treesize reduction 4, result has 71.4 percent of original size [2021-06-10 16:16:10,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:10,962 INFO L142 QuantifierPusher]: treesize reduction 8, result has 55.6 percent of original size [2021-06-10 16:16:10,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:10,967 INFO L142 QuantifierPusher]: treesize reduction 8, result has 60.0 percent of original size [2021-06-10 16:16:10,968 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:10,977 INFO L142 QuantifierPusher]: treesize reduction 15, result has 60.5 percent of original size [2021-06-10 16:16:10,977 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 16:16:10,995 INFO L142 QuantifierPusher]: treesize reduction 11, result has 52.2 percent of original size [2021-06-10 16:16:10,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:10,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:10,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:10,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294115708] [2021-06-10 16:16:10,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:10,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 16:16:10,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917627372] [2021-06-10 16:16:10,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-10 16:16:10,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:10,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-10 16:16:10,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-10 16:16:10,998 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:16:10,998 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 199 transitions, 3559 flow. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:10,998 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:10,998 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:16:10,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:11,388 INFO L129 PetriNetUnfolder]: 484/1915 cut-off events. [2021-06-10 16:16:11,389 INFO L130 PetriNetUnfolder]: For 37352/37502 co-relation queries the response was YES. [2021-06-10 16:16:11,404 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12888 conditions, 1915 events. 484/1915 cut-off events. For 37352/37502 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16724 event pairs, 151 based on Foata normal form. 36/1877 useless extension candidates. Maximal degree in co-relation 12811. Up to 470 conditions per place. [2021-06-10 16:16:11,409 INFO L132 encePairwiseOnDemand]: 41/53 looper letters, 99 selfloop transitions, 62 changer transitions 52/246 dead transitions. [2021-06-10 16:16:11,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 246 transitions, 4826 flow [2021-06-10 16:16:11,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 16:16:11,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 16:16:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 326 transitions. [2021-06-10 16:16:11,410 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7688679245283019 [2021-06-10 16:16:11,410 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 326 transitions. [2021-06-10 16:16:11,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 326 transitions. [2021-06-10 16:16:11,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:11,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 326 transitions. [2021-06-10 16:16:11,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 40.75) internal successors, (326), 8 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:11,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:11,411 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:11,411 INFO L185 Difference]: Start difference. First operand has 229 places, 199 transitions, 3559 flow. Second operand 8 states and 326 transitions. [2021-06-10 16:16:11,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 246 transitions, 4826 flow [2021-06-10 16:16:11,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 246 transitions, 4288 flow, removed 39 selfloop flow, removed 22 redundant places. [2021-06-10 16:16:11,518 INFO L241 Difference]: Finished difference. Result has 213 places, 174 transitions, 2811 flow [2021-06-10 16:16:11,518 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3121, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2811, PETRI_PLACES=213, PETRI_TRANSITIONS=174} [2021-06-10 16:16:11,519 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 155 predicate places. [2021-06-10 16:16:11,519 INFO L480 AbstractCegarLoop]: Abstraction has has 213 places, 174 transitions, 2811 flow [2021-06-10 16:16:11,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:11,519 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:11,519 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:11,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-06-10 16:16:11,519 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:11,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:11,520 INFO L82 PathProgramCache]: Analyzing trace with hash -63868386, now seen corresponding path program 50 times [2021-06-10 16:16:11,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:11,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570739374] [2021-06-10 16:16:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:11,543 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:11,543 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:11,549 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:11,550 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:11,551 INFO L142 QuantifierPusher]: treesize reduction 4, result has 85.2 percent of original size [2021-06-10 16:16:11,551 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 16:16:11,564 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:11,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-06-10 16:16:11,578 INFO L142 QuantifierPusher]: treesize reduction 11, result has 67.6 percent of original size [2021-06-10 16:16:11,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 16:16:11,595 INFO L142 QuantifierPusher]: treesize reduction 13, result has 66.7 percent of original size [2021-06-10 16:16:11,595 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-06-10 16:16:11,620 INFO L142 QuantifierPusher]: treesize reduction 15, result has 61.5 percent of original size [2021-06-10 16:16:11,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-06-10 16:16:11,640 INFO L142 QuantifierPusher]: treesize reduction 42, result has 44.0 percent of original size [2021-06-10 16:16:11,641 INFO L147 QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size 28 [2021-06-10 16:16:11,672 INFO L142 QuantifierPusher]: treesize reduction 23, result has 30.3 percent of original size [2021-06-10 16:16:11,672 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:11,674 INFO L142 QuantifierPusher]: treesize reduction 38, result has 24.0 percent of original size [2021-06-10 16:16:11,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 16:16:11,675 INFO L142 QuantifierPusher]: treesize reduction 27, result has 3.6 percent of original size [2021-06-10 16:16:11,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:11,676 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:11,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:11,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570739374] [2021-06-10 16:16:11,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:11,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:16:11,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881060952] [2021-06-10 16:16:11,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:16:11,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:11,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:16:11,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:16:11,678 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:16:11,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 174 transitions, 2811 flow. Second operand has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:11,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:11,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:16:11,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:11,968 INFO L129 PetriNetUnfolder]: 254/1015 cut-off events. [2021-06-10 16:16:11,968 INFO L130 PetriNetUnfolder]: For 21601/21709 co-relation queries the response was YES. [2021-06-10 16:16:11,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6935 conditions, 1015 events. 254/1015 cut-off events. For 21601/21709 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7604 event pairs, 64 based on Foata normal form. 114/1106 useless extension candidates. Maximal degree in co-relation 6866. Up to 191 conditions per place. [2021-06-10 16:16:11,977 INFO L132 encePairwiseOnDemand]: 44/53 looper letters, 30 selfloop transitions, 9 changer transitions 96/168 dead transitions. [2021-06-10 16:16:11,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 168 transitions, 2941 flow [2021-06-10 16:16:11,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 16:16:11,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 16:16:11,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 312 transitions. [2021-06-10 16:16:11,978 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7358490566037735 [2021-06-10 16:16:11,978 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 312 transitions. [2021-06-10 16:16:11,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 312 transitions. [2021-06-10 16:16:11,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:11,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 312 transitions. [2021-06-10 16:16:11,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 39.0) internal successors, (312), 8 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:11,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:11,979 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:11,979 INFO L185 Difference]: Start difference. First operand has 213 places, 174 transitions, 2811 flow. Second operand 8 states and 312 transitions. [2021-06-10 16:16:11,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 168 transitions, 2941 flow [2021-06-10 16:16:12,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 168 transitions, 2485 flow, removed 100 selfloop flow, removed 24 redundant places. [2021-06-10 16:16:12,053 INFO L241 Difference]: Finished difference. Result has 189 places, 72 transitions, 663 flow [2021-06-10 16:16:12,053 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=663, PETRI_PLACES=189, PETRI_TRANSITIONS=72} [2021-06-10 16:16:12,053 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 131 predicate places. [2021-06-10 16:16:12,053 INFO L480 AbstractCegarLoop]: Abstraction has has 189 places, 72 transitions, 663 flow [2021-06-10 16:16:12,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:12,053 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:12,053 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:12,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-06-10 16:16:12,054 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:12,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:12,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1155370432, now seen corresponding path program 51 times [2021-06-10 16:16:12,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:12,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411626903] [2021-06-10 16:16:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:12,070 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:12,071 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 16:16:12,081 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:12,082 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:12,091 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:12,091 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:12,098 INFO L142 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-06-10 16:16:12,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:12,099 INFO L142 QuantifierPusher]: treesize reduction 4, result has 71.4 percent of original size [2021-06-10 16:16:12,099 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:12,107 INFO L142 QuantifierPusher]: treesize reduction 4, result has 71.4 percent of original size [2021-06-10 16:16:12,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:12,116 INFO L142 QuantifierPusher]: treesize reduction 8, result has 55.6 percent of original size [2021-06-10 16:16:12,116 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:12,117 INFO L142 QuantifierPusher]: treesize reduction 8, result has 55.6 percent of original size [2021-06-10 16:16:12,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 16:16:12,131 INFO L142 QuantifierPusher]: treesize reduction 12, result has 42.9 percent of original size [2021-06-10 16:16:12,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 16:16:12,140 INFO L142 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-06-10 16:16:12,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:12,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:12,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:12,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411626903] [2021-06-10 16:16:12,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:12,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-10 16:16:12,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221604123] [2021-06-10 16:16:12,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 16:16:12,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:12,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 16:16:12,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-10 16:16:12,143 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 53 [2021-06-10 16:16:12,143 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 72 transitions, 663 flow. Second operand has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:12,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:12,143 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 53 [2021-06-10 16:16:12,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:12,273 INFO L129 PetriNetUnfolder]: 20/123 cut-off events. [2021-06-10 16:16:12,273 INFO L130 PetriNetUnfolder]: For 1515/1521 co-relation queries the response was YES. [2021-06-10 16:16:12,274 INFO L84 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 123 events. 20/123 cut-off events. For 1515/1521 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 417 event pairs, 9 based on Foata normal form. 9/131 useless extension candidates. Maximal degree in co-relation 726. Up to 28 conditions per place. [2021-06-10 16:16:12,274 INFO L132 encePairwiseOnDemand]: 44/53 looper letters, 0 selfloop transitions, 0 changer transitions 56/56 dead transitions. [2021-06-10 16:16:12,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 56 transitions, 681 flow [2021-06-10 16:16:12,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-10 16:16:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-06-10 16:16:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 393 transitions. [2021-06-10 16:16:12,275 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6740994854202401 [2021-06-10 16:16:12,275 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 393 transitions. [2021-06-10 16:16:12,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 393 transitions. [2021-06-10 16:16:12,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:12,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 393 transitions. [2021-06-10 16:16:12,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 35.72727272727273) internal successors, (393), 11 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:12,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:12,276 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:12,277 INFO L185 Difference]: Start difference. First operand has 189 places, 72 transitions, 663 flow. Second operand 11 states and 393 transitions. [2021-06-10 16:16:12,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 56 transitions, 681 flow [2021-06-10 16:16:12,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 56 transitions, 391 flow, removed 71 selfloop flow, removed 50 redundant places. [2021-06-10 16:16:12,281 INFO L241 Difference]: Finished difference. Result has 96 places, 0 transitions, 0 flow [2021-06-10 16:16:12,281 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=96, PETRI_TRANSITIONS=0} [2021-06-10 16:16:12,281 INFO L343 CegarLoopForPetriNet]: 58 programPoint places, 38 predicate places. [2021-06-10 16:16:12,281 INFO L480 AbstractCegarLoop]: Abstraction has has 96 places, 0 transitions, 0 flow [2021-06-10 16:16:12,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 35.111111111111114) internal successors, (316), 9 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 16:16:12,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-06-10 16:16:12,287 INFO L202 PluginConnector]: Adding new model bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 04:16:12 BasicIcfg [2021-06-10 16:16:12,287 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 16:16:12,287 INFO L168 Benchmark]: Toolchain (without parser) took 131645.82 ms. Allocated memory was 356.5 MB in the beginning and 14.0 GB in the end (delta: 13.6 GB). Free memory was 335.8 MB in the beginning and 6.0 GB in the end (delta: -5.7 GB). Peak memory consumption was 8.0 GB. Max. memory is 16.0 GB. [2021-06-10 16:16:12,287 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 356.5 MB. Free memory was 337.0 MB in the beginning and 336.9 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 16:16:12,287 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.23 ms. Allocated memory is still 356.5 MB. Free memory was 335.7 MB in the beginning and 334.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 16:16:12,288 INFO L168 Benchmark]: Boogie Preprocessor took 18.51 ms. Allocated memory is still 356.5 MB. Free memory was 334.2 MB in the beginning and 333.2 MB in the end (delta: 977.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 16:16:12,288 INFO L168 Benchmark]: RCFGBuilder took 237.45 ms. Allocated memory is still 356.5 MB. Free memory was 333.1 MB in the beginning and 319.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-10 16:16:12,288 INFO L168 Benchmark]: TraceAbstraction took 131357.61 ms. Allocated memory was 356.5 MB in the beginning and 14.0 GB in the end (delta: 13.6 GB). Free memory was 318.8 MB in the beginning and 6.0 GB in the end (delta: -5.7 GB). Peak memory consumption was 7.9 GB. Max. memory is 16.0 GB. [2021-06-10 16:16:12,288 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 356.5 MB. Free memory was 337.0 MB in the beginning and 336.9 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.23 ms. Allocated memory is still 356.5 MB. Free memory was 335.7 MB in the beginning and 334.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.51 ms. Allocated memory is still 356.5 MB. Free memory was 334.2 MB in the beginning and 333.2 MB in the end (delta: 977.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 237.45 ms. Allocated memory is still 356.5 MB. Free memory was 333.1 MB in the beginning and 319.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 131357.61 ms. Allocated memory was 356.5 MB in the beginning and 14.0 GB in the end (delta: 13.6 GB). Free memory was 318.8 MB in the beginning and 6.0 GB in the end (delta: -5.7 GB). Peak memory consumption was 7.9 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 82]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 26.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 131263.9ms, OverallIterations: 51, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 124743.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 53.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 646 SDtfs, 1904 SDslu, 417 SDs, 0 SdLazy, 11726 SolverSat, 1939 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6144.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 726 GetRequests, 107 SyntacticMatches, 33 SemanticMatches, 586 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 7907.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18606occurred in iteration=31, InterpolantAutomatonStates: 556, 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: 59.2ms SsaConstructionTime, 329.9ms SatisfiabilityAnalysisTime, 5732.8ms InterpolantComputationTime, 2448 NumberOfCodeBlocks, 2448 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 2397 ConstructedInterpolants, 0 QuantifiedInterpolants, 15595 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 51 InterpolantComputations, 51 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...