/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/lamport.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-12 00:17:34,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-12 00:17:34,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-12 00:17:34,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-12 00:17:34,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-12 00:17:34,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-12 00:17:34,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-12 00:17:34,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-12 00:17:34,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-12 00:17:34,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-12 00:17:34,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-12 00:17:34,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-12 00:17:34,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-12 00:17:34,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-12 00:17:34,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-12 00:17:34,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-12 00:17:34,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-12 00:17:34,894 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-03-12 00:17:34,928 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-12 00:17:34,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-12 00:17:34,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-12 00:17:34,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-12 00:17:34,932 INFO L138 SettingsManager]: * Use SBE=true [2021-03-12 00:17:34,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-12 00:17:34,932 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-12 00:17:34,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-12 00:17:34,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-12 00:17:34,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-12 00:17:34,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-12 00:17:34,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-12 00:17:34,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-12 00:17:34,934 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-12 00:17:34,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-12 00:17:34,934 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-12 00:17:34,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-12 00:17:34,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-12 00:17:34,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-12 00:17:34,935 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-12 00:17:34,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-12 00:17:34,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-12 00:17:34,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-12 00:17:34,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-12 00:17:34,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-12 00:17:34,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-12 00:17:34,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-12 00:17:34,937 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-12 00:17:34,937 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-12 00:17:35,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-12 00:17:35,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-12 00:17:35,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-12 00:17:35,267 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-12 00:17:35,269 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-12 00:17:35,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/lamport.wvr.bpl [2021-03-12 00:17:35,283 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/lamport.wvr.bpl' [2021-03-12 00:17:35,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-12 00:17:35,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-12 00:17:35,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-12 00:17:35,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-12 00:17:35,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-12 00:17:35,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:35" (1/1) ... [2021-03-12 00:17:35,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:35" (1/1) ... [2021-03-12 00:17:35,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-12 00:17:35,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-12 00:17:35,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-12 00:17:35,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-12 00:17:35,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:35" (1/1) ... [2021-03-12 00:17:35,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:35" (1/1) ... [2021-03-12 00:17:35,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:35" (1/1) ... [2021-03-12 00:17:35,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:35" (1/1) ... [2021-03-12 00:17:35,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:35" (1/1) ... [2021-03-12 00:17:35,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:35" (1/1) ... [2021-03-12 00:17:35,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:35" (1/1) ... [2021-03-12 00:17:35,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-12 00:17:35,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-12 00:17:35,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-12 00:17:35,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-12 00:17:35,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-12 00:17:35,434 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-12 00:17:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-12 00:17:35,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-12 00:17:35,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-12 00:17:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-12 00:17:35,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-12 00:17:35,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-12 00:17:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-12 00:17:35,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-12 00:17:35,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-12 00:17:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-12 00:17:35,436 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-12 00:17:35,436 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-12 00:17:35,615 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-12 00:17:35,615 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-12 00:17:35,616 INFO L202 PluginConnector]: Adding new model lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.03 12:17:35 BoogieIcfgContainer [2021-03-12 00:17:35,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-12 00:17:35,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-12 00:17:35,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-12 00:17:35,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-12 00:17:35,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 12:17:35" (1/2) ... [2021-03-12 00:17:35,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20398d31 and model type lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.03 12:17:35, skipping insertion in model container [2021-03-12 00:17:35,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.03 12:17:35" (2/2) ... [2021-03-12 00:17:35,622 INFO L111 eAbstractionObserver]: Analyzing ICFG lamport.wvr.bpl [2021-03-12 00:17:35,626 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-12 00:17:35,629 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-12 00:17:35,629 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-12 00:17:35,666 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-12 00:17:35,680 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-12 00:17:35,696 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-12 00:17:35,696 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-12 00:17:35,697 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-12 00:17:35,697 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-12 00:17:35,697 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-12 00:17:35,697 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-12 00:17:35,697 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-12 00:17:35,697 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-12 00:17:35,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 106 flow [2021-03-12 00:17:35,731 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-03-12 00:17:35,731 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-12 00:17:35,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 38 events. 0/38 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-12 00:17:35,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 106 flow [2021-03-12 00:17:35,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 36 transitions, 90 flow [2021-03-12 00:17:35,739 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-12 00:17:35,747 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 46 places, 36 transitions, 90 flow [2021-03-12 00:17:35,749 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 46 places, 36 transitions, 90 flow [2021-03-12 00:17:35,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 46 places, 36 transitions, 90 flow [2021-03-12 00:17:35,766 INFO L129 PetriNetUnfolder]: 0/36 cut-off events. [2021-03-12 00:17:35,766 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-12 00:17:35,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 0/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-12 00:17:35,768 INFO L116 LiptonReduction]: Number of co-enabled transitions 412 [2021-03-12 00:17:36,389 INFO L131 LiptonReduction]: Checked pairs total: 1378 [2021-03-12 00:17:36,389 INFO L133 LiptonReduction]: Total number of compositions: 13 [2021-03-12 00:17:36,390 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 654 [2021-03-12 00:17:36,414 INFO L129 PetriNetUnfolder]: 0/22 cut-off events. [2021-03-12 00:17:36,414 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-12 00:17:36,415 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:36,415 INFO L255 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] [2021-03-12 00:17:36,415 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:36,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:36,426 INFO L82 PathProgramCache]: Analyzing trace with hash 31769812, now seen corresponding path program 1 times [2021-03-12 00:17:36,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:36,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773944099] [2021-03-12 00:17:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:36,585 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:36,586 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:36,592 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:36,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:36,597 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:36,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:36,603 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:36,604 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:36,614 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:36,615 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:36,625 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:36,625 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:36,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773944099] [2021-03-12 00:17:36,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:36,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:17:36,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997569949] [2021-03-12 00:17:36,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:17:36,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:36,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:17:36,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:17:36,653 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 54 [2021-03-12 00:17:36,656 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 64 flow. Second operand has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:36,657 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:36,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 54 [2021-03-12 00:17:36,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:36,812 INFO L129 PetriNetUnfolder]: 15/88 cut-off events. [2021-03-12 00:17:36,813 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-03-12 00:17:36,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 88 events. 15/88 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 344 event pairs, 1 based on Foata normal form. 1/89 useless extension candidates. Maximal degree in co-relation 130. Up to 23 conditions per place. [2021-03-12 00:17:36,818 INFO L132 encePairwiseOnDemand]: 47/54 looper letters, 12 selfloop transitions, 11 changer transitions 2/41 dead transitions. [2021-03-12 00:17:36,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 41 transitions, 150 flow [2021-03-12 00:17:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:17:36,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:17:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 386 transitions. [2021-03-12 00:17:36,835 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7942386831275721 [2021-03-12 00:17:36,836 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 386 transitions. [2021-03-12 00:17:36,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 386 transitions. [2021-03-12 00:17:36,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:36,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 386 transitions. [2021-03-12 00:17:36,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 42.888888888888886) internal successors, (386), 9 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:36,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:36,856 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:36,857 INFO L185 Difference]: Start difference. First operand has 33 places, 23 transitions, 64 flow. Second operand 9 states and 386 transitions. [2021-03-12 00:17:36,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 41 transitions, 150 flow [2021-03-12 00:17:36,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-12 00:17:36,865 INFO L241 Difference]: Finished difference. Result has 39 places, 33 transitions, 117 flow [2021-03-12 00:17:36,866 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=117, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2021-03-12 00:17:36,867 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2021-03-12 00:17:36,867 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 117 flow [2021-03-12 00:17:36,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:36,868 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:36,868 INFO L255 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] [2021-03-12 00:17:36,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-12 00:17:36,868 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:36,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:36,869 INFO L82 PathProgramCache]: Analyzing trace with hash -289419308, now seen corresponding path program 2 times [2021-03-12 00:17:36,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:36,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131055860] [2021-03-12 00:17:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:36,934 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:36,934 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:36,938 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:36,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:36,943 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:36,944 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:36,952 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:36,953 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:36,970 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:36,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-12 00:17:36,981 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:36,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:36,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131055860] [2021-03-12 00:17:36,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:36,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-12 00:17:36,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494153408] [2021-03-12 00:17:36,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:17:36,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:36,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:17:36,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:17:36,990 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 54 [2021-03-12 00:17:36,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 117 flow. Second operand has 7 states, 7 states have (on average 36.285714285714285) internal successors, (254), 7 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:36,990 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:36,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 54 [2021-03-12 00:17:36,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:37,185 INFO L129 PetriNetUnfolder]: 79/300 cut-off events. [2021-03-12 00:17:37,185 INFO L130 PetriNetUnfolder]: For 10/12 co-relation queries the response was YES. [2021-03-12 00:17:37,189 INFO L84 FinitePrefix]: Finished finitePrefix Result has 590 conditions, 300 events. 79/300 cut-off events. For 10/12 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1861 event pairs, 8 based on Foata normal form. 2/285 useless extension candidates. Maximal degree in co-relation 571. Up to 48 conditions per place. [2021-03-12 00:17:37,191 INFO L132 encePairwiseOnDemand]: 45/54 looper letters, 19 selfloop transitions, 17 changer transitions 0/60 dead transitions. [2021-03-12 00:17:37,191 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 60 transitions, 243 flow [2021-03-12 00:17:37,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:17:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:17:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 352 transitions. [2021-03-12 00:17:37,194 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7242798353909465 [2021-03-12 00:17:37,194 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 352 transitions. [2021-03-12 00:17:37,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 352 transitions. [2021-03-12 00:17:37,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:37,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 352 transitions. [2021-03-12 00:17:37,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 39.111111111111114) internal successors, (352), 9 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,197 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,197 INFO L185 Difference]: Start difference. First operand has 39 places, 33 transitions, 117 flow. Second operand 9 states and 352 transitions. [2021-03-12 00:17:37,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 60 transitions, 243 flow [2021-03-12 00:17:37,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 60 transitions, 241 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-03-12 00:17:37,199 INFO L241 Difference]: Finished difference. Result has 50 places, 50 transitions, 231 flow [2021-03-12 00:17:37,200 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=231, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2021-03-12 00:17:37,200 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2021-03-12 00:17:37,200 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 231 flow [2021-03-12 00:17:37,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 36.285714285714285) internal successors, (254), 7 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,201 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:37,201 INFO L255 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] [2021-03-12 00:17:37,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-12 00:17:37,201 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:37,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1918703674, now seen corresponding path program 3 times [2021-03-12 00:17:37,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:37,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730639896] [2021-03-12 00:17:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:37,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,242 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:37,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,246 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:37,250 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,250 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:37,254 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,255 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:37,260 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,260 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:37,265 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,266 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:37,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730639896] [2021-03-12 00:17:37,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:37,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:17:37,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413552495] [2021-03-12 00:17:37,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:17:37,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:37,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:17:37,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:17:37,270 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 54 [2021-03-12 00:17:37,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 231 flow. Second operand has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:37,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 54 [2021-03-12 00:17:37,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:37,418 INFO L129 PetriNetUnfolder]: 95/387 cut-off events. [2021-03-12 00:17:37,418 INFO L130 PetriNetUnfolder]: For 181/193 co-relation queries the response was YES. [2021-03-12 00:17:37,420 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 387 events. 95/387 cut-off events. For 181/193 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2661 event pairs, 5 based on Foata normal form. 10/388 useless extension candidates. Maximal degree in co-relation 907. Up to 78 conditions per place. [2021-03-12 00:17:37,422 INFO L132 encePairwiseOnDemand]: 47/54 looper letters, 21 selfloop transitions, 11 changer transitions 2/67 dead transitions. [2021-03-12 00:17:37,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 67 transitions, 367 flow [2021-03-12 00:17:37,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:17:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:17:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 388 transitions. [2021-03-12 00:17:37,423 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7983539094650206 [2021-03-12 00:17:37,423 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 388 transitions. [2021-03-12 00:17:37,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 388 transitions. [2021-03-12 00:17:37,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:37,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 388 transitions. [2021-03-12 00:17:37,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 43.111111111111114) internal successors, (388), 9 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,426 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,426 INFO L185 Difference]: Start difference. First operand has 50 places, 50 transitions, 231 flow. Second operand 9 states and 388 transitions. [2021-03-12 00:17:37,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 67 transitions, 367 flow [2021-03-12 00:17:37,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 367 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-12 00:17:37,431 INFO L241 Difference]: Finished difference. Result has 64 places, 56 transitions, 309 flow [2021-03-12 00:17:37,431 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=309, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2021-03-12 00:17:37,432 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 31 predicate places. [2021-03-12 00:17:37,432 INFO L480 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 309 flow [2021-03-12 00:17:37,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,432 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:37,432 INFO L255 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] [2021-03-12 00:17:37,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-12 00:17:37,432 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:37,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:37,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1681230634, now seen corresponding path program 4 times [2021-03-12 00:17:37,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:37,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427016158] [2021-03-12 00:17:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:37,450 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,450 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:37,453 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,453 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:37,456 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,456 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:37,460 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,461 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:37,465 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,466 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:37,471 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,471 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:37,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427016158] [2021-03-12 00:17:37,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:37,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:17:37,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003451237] [2021-03-12 00:17:37,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:17:37,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:37,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:17:37,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:17:37,474 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 54 [2021-03-12 00:17:37,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 309 flow. Second operand has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:37,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 54 [2021-03-12 00:17:37,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:37,620 INFO L129 PetriNetUnfolder]: 100/416 cut-off events. [2021-03-12 00:17:37,620 INFO L130 PetriNetUnfolder]: For 470/496 co-relation queries the response was YES. [2021-03-12 00:17:37,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 416 events. 100/416 cut-off events. For 470/496 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2971 event pairs, 5 based on Foata normal form. 18/424 useless extension candidates. Maximal degree in co-relation 1234. Up to 136 conditions per place. [2021-03-12 00:17:37,626 INFO L132 encePairwiseOnDemand]: 47/54 looper letters, 17 selfloop transitions, 15 changer transitions 0/65 dead transitions. [2021-03-12 00:17:37,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 65 transitions, 437 flow [2021-03-12 00:17:37,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:17:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:17:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 344 transitions. [2021-03-12 00:17:37,628 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7962962962962963 [2021-03-12 00:17:37,631 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 344 transitions. [2021-03-12 00:17:37,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 344 transitions. [2021-03-12 00:17:37,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:37,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 344 transitions. [2021-03-12 00:17:37,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 43.0) internal successors, (344), 8 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,637 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,638 INFO L185 Difference]: Start difference. First operand has 64 places, 56 transitions, 309 flow. Second operand 8 states and 344 transitions. [2021-03-12 00:17:37,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 65 transitions, 437 flow [2021-03-12 00:17:37,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 408 flow, removed 10 selfloop flow, removed 4 redundant places. [2021-03-12 00:17:37,644 INFO L241 Difference]: Finished difference. Result has 68 places, 63 transitions, 384 flow [2021-03-12 00:17:37,644 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=384, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2021-03-12 00:17:37,644 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 35 predicate places. [2021-03-12 00:17:37,645 INFO L480 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 384 flow [2021-03-12 00:17:37,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,645 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:37,645 INFO L255 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] [2021-03-12 00:17:37,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-12 00:17:37,645 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:37,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:37,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1155184850, now seen corresponding path program 5 times [2021-03-12 00:17:37,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:37,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712945157] [2021-03-12 00:17:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:37,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,663 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:37,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:37,669 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:37,674 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:37,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:37,685 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:37,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712945157] [2021-03-12 00:17:37,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:37,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:17:37,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286406272] [2021-03-12 00:17:37,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:17:37,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:37,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:17:37,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:17:37,688 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 54 [2021-03-12 00:17:37,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 384 flow. Second operand has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:37,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 54 [2021-03-12 00:17:37,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:37,803 INFO L129 PetriNetUnfolder]: 97/441 cut-off events. [2021-03-12 00:17:37,804 INFO L130 PetriNetUnfolder]: For 540/568 co-relation queries the response was YES. [2021-03-12 00:17:37,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1436 conditions, 441 events. 97/441 cut-off events. For 540/568 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3271 event pairs, 5 based on Foata normal form. 20/451 useless extension candidates. Maximal degree in co-relation 1294. Up to 122 conditions per place. [2021-03-12 00:17:37,808 INFO L132 encePairwiseOnDemand]: 47/54 looper letters, 18 selfloop transitions, 17 changer transitions 0/68 dead transitions. [2021-03-12 00:17:37,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 68 transitions, 490 flow [2021-03-12 00:17:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:17:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:17:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 385 transitions. [2021-03-12 00:17:37,809 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7921810699588477 [2021-03-12 00:17:37,810 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 385 transitions. [2021-03-12 00:17:37,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 385 transitions. [2021-03-12 00:17:37,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:37,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 385 transitions. [2021-03-12 00:17:37,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 42.77777777777778) internal successors, (385), 9 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) [2021-03-12 00:17:37,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,812 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,812 INFO L185 Difference]: Start difference. First operand has 68 places, 63 transitions, 384 flow. Second operand 9 states and 385 transitions. [2021-03-12 00:17:37,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 68 transitions, 490 flow [2021-03-12 00:17:37,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 459 flow, removed 8 selfloop flow, removed 3 redundant places. [2021-03-12 00:17:37,818 INFO L241 Difference]: Finished difference. Result has 75 places, 65 transitions, 412 flow [2021-03-12 00:17:37,819 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=412, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2021-03-12 00:17:37,819 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 42 predicate places. [2021-03-12 00:17:37,819 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 412 flow [2021-03-12 00:17:37,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,819 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:37,819 INFO L255 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] [2021-03-12 00:17:37,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-12 00:17:37,820 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:37,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:37,820 INFO L82 PathProgramCache]: Analyzing trace with hash -753905790, now seen corresponding path program 6 times [2021-03-12 00:17:37,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:37,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220343180] [2021-03-12 00:17:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:37,835 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,835 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:37,838 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,838 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:37,841 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:37,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:37,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:37,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:37,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:37,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220343180] [2021-03-12 00:17:37,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:37,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:17:37,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988859608] [2021-03-12 00:17:37,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:17:37,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:37,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:17:37,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:17:37,859 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 54 [2021-03-12 00:17:37,860 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 412 flow. Second operand has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:37,860 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:37,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 54 [2021-03-12 00:17:37,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:38,013 INFO L129 PetriNetUnfolder]: 96/459 cut-off events. [2021-03-12 00:17:38,013 INFO L130 PetriNetUnfolder]: For 637/675 co-relation queries the response was YES. [2021-03-12 00:17:38,015 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1552 conditions, 459 events. 96/459 cut-off events. For 637/675 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3519 event pairs, 2 based on Foata normal form. 22/471 useless extension candidates. Maximal degree in co-relation 1428. Up to 137 conditions per place. [2021-03-12 00:17:38,017 INFO L132 encePairwiseOnDemand]: 47/54 looper letters, 17 selfloop transitions, 11 changer transitions 7/68 dead transitions. [2021-03-12 00:17:38,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 68 transitions, 513 flow [2021-03-12 00:17:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-12 00:17:38,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-03-12 00:17:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 425 transitions. [2021-03-12 00:17:38,019 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7870370370370371 [2021-03-12 00:17:38,019 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 425 transitions. [2021-03-12 00:17:38,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 425 transitions. [2021-03-12 00:17:38,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:38,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 425 transitions. [2021-03-12 00:17:38,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 42.5) internal successors, (425), 10 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 54.0) internal successors, (594), 11 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,023 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 54.0) internal successors, (594), 11 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,027 INFO L185 Difference]: Start difference. First operand has 75 places, 65 transitions, 412 flow. Second operand 10 states and 425 transitions. [2021-03-12 00:17:38,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 68 transitions, 513 flow [2021-03-12 00:17:38,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 68 transitions, 454 flow, removed 12 selfloop flow, removed 6 redundant places. [2021-03-12 00:17:38,034 INFO L241 Difference]: Finished difference. Result has 80 places, 59 transitions, 352 flow [2021-03-12 00:17:38,034 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=352, PETRI_PLACES=80, PETRI_TRANSITIONS=59} [2021-03-12 00:17:38,035 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 47 predicate places. [2021-03-12 00:17:38,035 INFO L480 AbstractCegarLoop]: Abstraction has has 80 places, 59 transitions, 352 flow [2021-03-12 00:17:38,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,035 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:38,035 INFO L255 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] [2021-03-12 00:17:38,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-12 00:17:38,035 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:38,036 INFO L82 PathProgramCache]: Analyzing trace with hash 650912478, now seen corresponding path program 7 times [2021-03-12 00:17:38,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:38,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882910579] [2021-03-12 00:17:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:38,068 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,069 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:38,084 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,084 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:38,088 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,088 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:38,095 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,095 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:38,101 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,101 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:38,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:38,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882910579] [2021-03-12 00:17:38,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:38,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:17:38,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295069845] [2021-03-12 00:17:38,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:17:38,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:38,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:17:38,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:17:38,111 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 54 [2021-03-12 00:17:38,111 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 59 transitions, 352 flow. Second operand has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:38,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 54 [2021-03-12 00:17:38,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:38,243 INFO L129 PetriNetUnfolder]: 97/551 cut-off events. [2021-03-12 00:17:38,244 INFO L130 PetriNetUnfolder]: For 824/863 co-relation queries the response was YES. [2021-03-12 00:17:38,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1762 conditions, 551 events. 97/551 cut-off events. For 824/863 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4589 event pairs, 6 based on Foata normal form. 26/564 useless extension candidates. Maximal degree in co-relation 1725. Up to 96 conditions per place. [2021-03-12 00:17:38,248 INFO L132 encePairwiseOnDemand]: 47/54 looper letters, 28 selfloop transitions, 20 changer transitions 2/83 dead transitions. [2021-03-12 00:17:38,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 83 transitions, 629 flow [2021-03-12 00:17:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:17:38,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:17:38,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 388 transitions. [2021-03-12 00:17:38,250 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7983539094650206 [2021-03-12 00:17:38,250 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 388 transitions. [2021-03-12 00:17:38,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 388 transitions. [2021-03-12 00:17:38,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:38,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 388 transitions. [2021-03-12 00:17:38,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 43.111111111111114) internal successors, (388), 9 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,252 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,253 INFO L185 Difference]: Start difference. First operand has 80 places, 59 transitions, 352 flow. Second operand 9 states and 388 transitions. [2021-03-12 00:17:38,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 83 transitions, 629 flow [2021-03-12 00:17:38,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 83 transitions, 571 flow, removed 10 selfloop flow, removed 9 redundant places. [2021-03-12 00:17:38,260 INFO L241 Difference]: Finished difference. Result has 77 places, 70 transitions, 485 flow [2021-03-12 00:17:38,260 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=485, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2021-03-12 00:17:38,260 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 44 predicate places. [2021-03-12 00:17:38,260 INFO L480 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 485 flow [2021-03-12 00:17:38,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,260 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:38,261 INFO L255 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] [2021-03-12 00:17:38,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-12 00:17:38,261 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:38,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1369443218, now seen corresponding path program 8 times [2021-03-12 00:17:38,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:38,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417532235] [2021-03-12 00:17:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:38,301 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:38,304 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:38,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:38,313 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:38,319 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,320 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:38,326 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,327 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:38,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417532235] [2021-03-12 00:17:38,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:38,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:17:38,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675043674] [2021-03-12 00:17:38,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:17:38,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:38,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:17:38,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:17:38,329 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 54 [2021-03-12 00:17:38,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 485 flow. Second operand has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:38,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 54 [2021-03-12 00:17:38,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:38,443 INFO L129 PetriNetUnfolder]: 97/539 cut-off events. [2021-03-12 00:17:38,444 INFO L130 PetriNetUnfolder]: For 1119/1167 co-relation queries the response was YES. [2021-03-12 00:17:38,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 539 events. 97/539 cut-off events. For 1119/1167 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4406 event pairs, 14 based on Foata normal form. 32/556 useless extension candidates. Maximal degree in co-relation 1715. Up to 121 conditions per place. [2021-03-12 00:17:38,447 INFO L132 encePairwiseOnDemand]: 47/54 looper letters, 21 selfloop transitions, 22 changer transitions 2/78 dead transitions. [2021-03-12 00:17:38,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 78 transitions, 630 flow [2021-03-12 00:17:38,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:17:38,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:17:38,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 385 transitions. [2021-03-12 00:17:38,449 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7921810699588477 [2021-03-12 00:17:38,449 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 385 transitions. [2021-03-12 00:17:38,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 385 transitions. [2021-03-12 00:17:38,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:38,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 385 transitions. [2021-03-12 00:17:38,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 42.77777777777778) internal successors, (385), 9 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) [2021-03-12 00:17:38,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,451 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,451 INFO L185 Difference]: Start difference. First operand has 77 places, 70 transitions, 485 flow. Second operand 9 states and 385 transitions. [2021-03-12 00:17:38,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 78 transitions, 630 flow [2021-03-12 00:17:38,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 78 transitions, 597 flow, removed 10 selfloop flow, removed 4 redundant places. [2021-03-12 00:17:38,458 INFO L241 Difference]: Finished difference. Result has 82 places, 73 transitions, 540 flow [2021-03-12 00:17:38,458 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=540, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2021-03-12 00:17:38,458 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 49 predicate places. [2021-03-12 00:17:38,458 INFO L480 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 540 flow [2021-03-12 00:17:38,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,458 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:38,458 INFO L255 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] [2021-03-12 00:17:38,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-12 00:17:38,459 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:38,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:38,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1731653932, now seen corresponding path program 9 times [2021-03-12 00:17:38,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:38,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35544377] [2021-03-12 00:17:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:38,471 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,471 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:38,473 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,473 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:38,476 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,476 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:38,480 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,480 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:38,484 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,484 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:38,489 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,489 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:38,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35544377] [2021-03-12 00:17:38,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:38,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:17:38,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260076936] [2021-03-12 00:17:38,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:17:38,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:38,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:17:38,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:17:38,491 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 54 [2021-03-12 00:17:38,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 540 flow. Second operand has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:38,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 54 [2021-03-12 00:17:38,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:38,598 INFO L129 PetriNetUnfolder]: 89/539 cut-off events. [2021-03-12 00:17:38,598 INFO L130 PetriNetUnfolder]: For 1154/1200 co-relation queries the response was YES. [2021-03-12 00:17:38,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1827 conditions, 539 events. 89/539 cut-off events. For 1154/1200 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4495 event pairs, 6 based on Foata normal form. 31/556 useless extension candidates. Maximal degree in co-relation 1728. Up to 157 conditions per place. [2021-03-12 00:17:38,602 INFO L132 encePairwiseOnDemand]: 47/54 looper letters, 27 selfloop transitions, 20 changer transitions 0/80 dead transitions. [2021-03-12 00:17:38,602 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 80 transitions, 689 flow [2021-03-12 00:17:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-12 00:17:38,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-03-12 00:17:38,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 426 transitions. [2021-03-12 00:17:38,604 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7888888888888889 [2021-03-12 00:17:38,604 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 426 transitions. [2021-03-12 00:17:38,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 426 transitions. [2021-03-12 00:17:38,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:38,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 426 transitions. [2021-03-12 00:17:38,605 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) [2021-03-12 00:17:38,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 54.0) internal successors, (594), 11 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,606 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 54.0) internal successors, (594), 11 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,606 INFO L185 Difference]: Start difference. First operand has 82 places, 73 transitions, 540 flow. Second operand 10 states and 426 transitions. [2021-03-12 00:17:38,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 80 transitions, 689 flow [2021-03-12 00:17:38,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 605 flow, removed 16 selfloop flow, removed 9 redundant places. [2021-03-12 00:17:38,614 INFO L241 Difference]: Finished difference. Result has 82 places, 78 transitions, 558 flow [2021-03-12 00:17:38,614 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=558, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2021-03-12 00:17:38,615 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 49 predicate places. [2021-03-12 00:17:38,615 INFO L480 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 558 flow [2021-03-12 00:17:38,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,615 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:38,615 INFO L255 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] [2021-03-12 00:17:38,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-12 00:17:38,615 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:38,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:38,616 INFO L82 PathProgramCache]: Analyzing trace with hash -759290604, now seen corresponding path program 10 times [2021-03-12 00:17:38,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:38,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115609718] [2021-03-12 00:17:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:38,626 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:38,628 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,629 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:38,631 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,632 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:38,635 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,635 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:38,644 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:38,649 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,650 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:38,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115609718] [2021-03-12 00:17:38,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:38,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:17:38,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775947010] [2021-03-12 00:17:38,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:17:38,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:17:38,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:17:38,655 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 54 [2021-03-12 00:17:38,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 558 flow. Second operand has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:38,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 54 [2021-03-12 00:17:38,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:38,764 INFO L129 PetriNetUnfolder]: 89/537 cut-off events. [2021-03-12 00:17:38,764 INFO L130 PetriNetUnfolder]: For 799/853 co-relation queries the response was YES. [2021-03-12 00:17:38,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 537 events. 89/537 cut-off events. For 799/853 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4499 event pairs, 6 based on Foata normal form. 37/560 useless extension candidates. Maximal degree in co-relation 1602. Up to 145 conditions per place. [2021-03-12 00:17:38,768 INFO L132 encePairwiseOnDemand]: 47/54 looper letters, 25 selfloop transitions, 22 changer transitions 0/80 dead transitions. [2021-03-12 00:17:38,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 80 transitions, 661 flow [2021-03-12 00:17:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:17:38,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:17:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 385 transitions. [2021-03-12 00:17:38,770 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7921810699588477 [2021-03-12 00:17:38,770 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 385 transitions. [2021-03-12 00:17:38,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 385 transitions. [2021-03-12 00:17:38,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:38,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 385 transitions. [2021-03-12 00:17:38,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 42.77777777777778) internal successors, (385), 9 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) [2021-03-12 00:17:38,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,772 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,772 INFO L185 Difference]: Start difference. First operand has 82 places, 78 transitions, 558 flow. Second operand 9 states and 385 transitions. [2021-03-12 00:17:38,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 80 transitions, 661 flow [2021-03-12 00:17:38,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 80 transitions, 605 flow, removed 13 selfloop flow, removed 5 redundant places. [2021-03-12 00:17:38,780 INFO L241 Difference]: Finished difference. Result has 86 places, 78 transitions, 549 flow [2021-03-12 00:17:38,780 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=549, PETRI_PLACES=86, PETRI_TRANSITIONS=78} [2021-03-12 00:17:38,780 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 53 predicate places. [2021-03-12 00:17:38,780 INFO L480 AbstractCegarLoop]: Abstraction has has 86 places, 78 transitions, 549 flow [2021-03-12 00:17:38,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,781 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:38,781 INFO L255 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] [2021-03-12 00:17:38,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-12 00:17:38,781 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:38,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:38,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1097498502, now seen corresponding path program 11 times [2021-03-12 00:17:38,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:38,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799836070] [2021-03-12 00:17:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:38,792 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,792 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:38,794 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,794 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:38,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,798 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:38,801 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,802 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-12 00:17:38,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:38,812 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,812 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:38,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799836070] [2021-03-12 00:17:38,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:38,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-12 00:17:38,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124392813] [2021-03-12 00:17:38,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:17:38,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:38,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:17:38,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:17:38,814 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 54 [2021-03-12 00:17:38,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 78 transitions, 549 flow. Second operand has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:38,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 54 [2021-03-12 00:17:38,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:38,922 INFO L129 PetriNetUnfolder]: 89/535 cut-off events. [2021-03-12 00:17:38,922 INFO L130 PetriNetUnfolder]: For 595/631 co-relation queries the response was YES. [2021-03-12 00:17:38,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1749 conditions, 535 events. 89/535 cut-off events. For 595/631 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4481 event pairs, 6 based on Foata normal form. 27/548 useless extension candidates. Maximal degree in co-relation 1608. Up to 163 conditions per place. [2021-03-12 00:17:38,926 INFO L132 encePairwiseOnDemand]: 47/54 looper letters, 24 selfloop transitions, 13 changer transitions 13/79 dead transitions. [2021-03-12 00:17:38,926 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 79 transitions, 646 flow [2021-03-12 00:17:38,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:17:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:17:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 344 transitions. [2021-03-12 00:17:38,927 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7962962962962963 [2021-03-12 00:17:38,927 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 344 transitions. [2021-03-12 00:17:38,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 344 transitions. [2021-03-12 00:17:38,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:38,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 344 transitions. [2021-03-12 00:17:38,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 43.0) internal successors, (344), 8 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,930 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,930 INFO L185 Difference]: Start difference. First operand has 86 places, 78 transitions, 549 flow. Second operand 8 states and 344 transitions. [2021-03-12 00:17:38,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 79 transitions, 646 flow [2021-03-12 00:17:38,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 533 flow, removed 11 selfloop flow, removed 12 redundant places. [2021-03-12 00:17:38,936 INFO L241 Difference]: Finished difference. Result has 82 places, 65 transitions, 398 flow [2021-03-12 00:17:38,936 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=398, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2021-03-12 00:17:38,936 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 49 predicate places. [2021-03-12 00:17:38,936 INFO L480 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 398 flow [2021-03-12 00:17:38,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,937 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:38,937 INFO L255 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] [2021-03-12 00:17:38,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-12 00:17:38,937 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:38,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1920355964, now seen corresponding path program 12 times [2021-03-12 00:17:38,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:38,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176378450] [2021-03-12 00:17:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:38,944 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,945 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:38,945 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,945 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:38,948 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:38,948 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:38,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176378450] [2021-03-12 00:17:38,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:38,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-12 00:17:38,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621503729] [2021-03-12 00:17:38,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-12 00:17:38,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:38,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-12 00:17:38,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-12 00:17:38,950 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 54 [2021-03-12 00:17:38,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 65 transitions, 398 flow. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:38,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 54 [2021-03-12 00:17:38,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:38,978 INFO L129 PetriNetUnfolder]: 34/338 cut-off events. [2021-03-12 00:17:38,978 INFO L130 PetriNetUnfolder]: For 214/214 co-relation queries the response was YES. [2021-03-12 00:17:38,979 INFO L84 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 338 events. 34/338 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2604 event pairs, 0 based on Foata normal form. 1/326 useless extension candidates. Maximal degree in co-relation 775. Up to 55 conditions per place. [2021-03-12 00:17:38,980 INFO L132 encePairwiseOnDemand]: 51/54 looper letters, 2 selfloop transitions, 4 changer transitions 2/64 dead transitions. [2021-03-12 00:17:38,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 64 transitions, 404 flow [2021-03-12 00:17:38,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 00:17:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-12 00:17:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2021-03-12 00:17:38,981 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.845679012345679 [2021-03-12 00:17:38,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2021-03-12 00:17:38,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2021-03-12 00:17:38,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:38,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2021-03-12 00:17:38,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,983 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,983 INFO L185 Difference]: Start difference. First operand has 82 places, 65 transitions, 398 flow. Second operand 3 states and 137 transitions. [2021-03-12 00:17:38,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 64 transitions, 404 flow [2021-03-12 00:17:38,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 355 flow, removed 4 selfloop flow, removed 11 redundant places. [2021-03-12 00:17:38,994 INFO L241 Difference]: Finished difference. Result has 64 places, 62 transitions, 345 flow [2021-03-12 00:17:38,994 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=345, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2021-03-12 00:17:38,994 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 31 predicate places. [2021-03-12 00:17:38,994 INFO L480 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 345 flow [2021-03-12 00:17:38,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:38,994 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:38,994 INFO L255 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] [2021-03-12 00:17:38,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-12 00:17:38,995 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:38,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1132807990, now seen corresponding path program 13 times [2021-03-12 00:17:38,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:38,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118411557] [2021-03-12 00:17:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:39,007 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,012 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,013 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,018 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,018 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,024 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,024 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,031 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,032 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,040 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,040 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,050 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:39,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118411557] [2021-03-12 00:17:39,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:39,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:17:39,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141842862] [2021-03-12 00:17:39,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:17:39,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:39,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:17:39,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:17:39,052 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 54 [2021-03-12 00:17:39,052 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 345 flow. Second operand has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:39,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 54 [2021-03-12 00:17:39,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:39,203 INFO L129 PetriNetUnfolder]: 111/695 cut-off events. [2021-03-12 00:17:39,203 INFO L130 PetriNetUnfolder]: For 589/670 co-relation queries the response was YES. [2021-03-12 00:17:39,205 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1915 conditions, 695 events. 111/695 cut-off events. For 589/670 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6206 event pairs, 2 based on Foata normal form. 18/697 useless extension candidates. Maximal degree in co-relation 1744. Up to 111 conditions per place. [2021-03-12 00:17:39,207 INFO L132 encePairwiseOnDemand]: 45/54 looper letters, 21 selfloop transitions, 18 changer transitions 7/89 dead transitions. [2021-03-12 00:17:39,207 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 89 transitions, 577 flow [2021-03-12 00:17:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:17:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:17:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 350 transitions. [2021-03-12 00:17:39,208 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.720164609053498 [2021-03-12 00:17:39,208 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 350 transitions. [2021-03-12 00:17:39,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 350 transitions. [2021-03-12 00:17:39,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:39,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 350 transitions. [2021-03-12 00:17:39,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 38.888888888888886) internal successors, (350), 9 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,211 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,211 INFO L185 Difference]: Start difference. First operand has 64 places, 62 transitions, 345 flow. Second operand 9 states and 350 transitions. [2021-03-12 00:17:39,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 89 transitions, 577 flow [2021-03-12 00:17:39,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 561 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-12 00:17:39,214 INFO L241 Difference]: Finished difference. Result has 75 places, 72 transitions, 466 flow [2021-03-12 00:17:39,214 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=466, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2021-03-12 00:17:39,215 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 42 predicate places. [2021-03-12 00:17:39,215 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 466 flow [2021-03-12 00:17:39,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,215 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:39,215 INFO L255 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] [2021-03-12 00:17:39,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-12 00:17:39,215 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:39,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:39,216 INFO L82 PathProgramCache]: Analyzing trace with hash 321214382, now seen corresponding path program 14 times [2021-03-12 00:17:39,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:39,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810932058] [2021-03-12 00:17:39,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:39,226 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,226 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,231 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,231 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,236 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,236 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,247 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,254 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,254 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,262 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,271 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,272 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:39,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810932058] [2021-03-12 00:17:39,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:39,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:17:39,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090394305] [2021-03-12 00:17:39,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:17:39,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:39,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:17:39,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:17:39,273 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 54 [2021-03-12 00:17:39,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 466 flow. Second operand has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:39,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 54 [2021-03-12 00:17:39,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:39,438 INFO L129 PetriNetUnfolder]: 136/749 cut-off events. [2021-03-12 00:17:39,438 INFO L130 PetriNetUnfolder]: For 1428/1558 co-relation queries the response was YES. [2021-03-12 00:17:39,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2459 conditions, 749 events. 136/749 cut-off events. For 1428/1558 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6667 event pairs, 13 based on Foata normal form. 32/759 useless extension candidates. Maximal degree in co-relation 2280. Up to 123 conditions per place. [2021-03-12 00:17:39,443 INFO L132 encePairwiseOnDemand]: 45/54 looper letters, 24 selfloop transitions, 17 changer transitions 3/87 dead transitions. [2021-03-12 00:17:39,443 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 87 transitions, 661 flow [2021-03-12 00:17:39,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:17:39,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:17:39,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 348 transitions. [2021-03-12 00:17:39,444 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7160493827160493 [2021-03-12 00:17:39,445 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 348 transitions. [2021-03-12 00:17:39,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 348 transitions. [2021-03-12 00:17:39,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:39,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 348 transitions. [2021-03-12 00:17:39,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 38.666666666666664) internal successors, (348), 9 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,447 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,447 INFO L185 Difference]: Start difference. First operand has 75 places, 72 transitions, 466 flow. Second operand 9 states and 348 transitions. [2021-03-12 00:17:39,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 87 transitions, 661 flow [2021-03-12 00:17:39,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 651 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-12 00:17:39,452 INFO L241 Difference]: Finished difference. Result has 83 places, 78 transitions, 555 flow [2021-03-12 00:17:39,452 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=555, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2021-03-12 00:17:39,452 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 50 predicate places. [2021-03-12 00:17:39,452 INFO L480 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 555 flow [2021-03-12 00:17:39,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,452 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:39,452 INFO L255 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] [2021-03-12 00:17:39,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-12 00:17:39,453 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:39,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1632975116, now seen corresponding path program 15 times [2021-03-12 00:17:39,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:39,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258998521] [2021-03-12 00:17:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:39,463 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,463 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,467 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,468 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,473 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,473 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,484 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,485 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,493 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,496 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,505 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-03-12 00:17:39,505 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,515 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,516 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:39,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258998521] [2021-03-12 00:17:39,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:39,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:17:39,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553939495] [2021-03-12 00:17:39,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:17:39,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:39,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:17:39,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:17:39,517 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 54 [2021-03-12 00:17:39,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 555 flow. Second operand has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,518 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:39,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 54 [2021-03-12 00:17:39,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:39,680 INFO L129 PetriNetUnfolder]: 107/677 cut-off events. [2021-03-12 00:17:39,680 INFO L130 PetriNetUnfolder]: For 1636/1752 co-relation queries the response was YES. [2021-03-12 00:17:39,682 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2273 conditions, 677 events. 107/677 cut-off events. For 1636/1752 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6038 event pairs, 15 based on Foata normal form. 31/681 useless extension candidates. Maximal degree in co-relation 2090. Up to 108 conditions per place. [2021-03-12 00:17:39,685 INFO L132 encePairwiseOnDemand]: 46/54 looper letters, 23 selfloop transitions, 12 changer transitions 4/82 dead transitions. [2021-03-12 00:17:39,685 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 82 transitions, 651 flow [2021-03-12 00:17:39,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:17:39,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:17:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 346 transitions. [2021-03-12 00:17:39,686 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7119341563786008 [2021-03-12 00:17:39,686 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 346 transitions. [2021-03-12 00:17:39,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 346 transitions. [2021-03-12 00:17:39,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:39,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 346 transitions. [2021-03-12 00:17:39,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 38.44444444444444) internal successors, (346), 9 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) [2021-03-12 00:17:39,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,689 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,689 INFO L185 Difference]: Start difference. First operand has 83 places, 78 transitions, 555 flow. Second operand 9 states and 346 transitions. [2021-03-12 00:17:39,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 82 transitions, 651 flow [2021-03-12 00:17:39,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 619 flow, removed 5 selfloop flow, removed 3 redundant places. [2021-03-12 00:17:39,695 INFO L241 Difference]: Finished difference. Result has 89 places, 73 transitions, 504 flow [2021-03-12 00:17:39,695 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=504, PETRI_PLACES=89, PETRI_TRANSITIONS=73} [2021-03-12 00:17:39,696 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 56 predicate places. [2021-03-12 00:17:39,696 INFO L480 AbstractCegarLoop]: Abstraction has has 89 places, 73 transitions, 504 flow [2021-03-12 00:17:39,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,696 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:39,696 INFO L255 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] [2021-03-12 00:17:39,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-12 00:17:39,696 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:39,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:39,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1185790488, now seen corresponding path program 16 times [2021-03-12 00:17:39,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:39,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155354743] [2021-03-12 00:17:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:39,704 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,705 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:39,705 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,705 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:39,708 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:39,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155354743] [2021-03-12 00:17:39,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:39,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-12 00:17:39,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932790265] [2021-03-12 00:17:39,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-12 00:17:39,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:39,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-12 00:17:39,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-12 00:17:39,710 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 54 [2021-03-12 00:17:39,711 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 73 transitions, 504 flow. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,711 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:39,711 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 54 [2021-03-12 00:17:39,711 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:39,749 INFO L129 PetriNetUnfolder]: 66/535 cut-off events. [2021-03-12 00:17:39,749 INFO L130 PetriNetUnfolder]: For 643/646 co-relation queries the response was YES. [2021-03-12 00:17:39,751 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1409 conditions, 535 events. 66/535 cut-off events. For 643/646 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4663 event pairs, 1 based on Foata normal form. 6/523 useless extension candidates. Maximal degree in co-relation 1230. Up to 88 conditions per place. [2021-03-12 00:17:39,752 INFO L132 encePairwiseOnDemand]: 51/54 looper letters, 2 selfloop transitions, 7 changer transitions 1/73 dead transitions. [2021-03-12 00:17:39,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 73 transitions, 522 flow [2021-03-12 00:17:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 00:17:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-12 00:17:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2021-03-12 00:17:39,753 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.845679012345679 [2021-03-12 00:17:39,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2021-03-12 00:17:39,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2021-03-12 00:17:39,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:39,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2021-03-12 00:17:39,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,755 INFO L185 Difference]: Start difference. First operand has 89 places, 73 transitions, 504 flow. Second operand 3 states and 137 transitions. [2021-03-12 00:17:39,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 73 transitions, 522 flow [2021-03-12 00:17:39,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 494 flow, removed 2 selfloop flow, removed 8 redundant places. [2021-03-12 00:17:39,759 INFO L241 Difference]: Finished difference. Result has 80 places, 72 transitions, 488 flow [2021-03-12 00:17:39,759 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=488, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2021-03-12 00:17:39,760 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 47 predicate places. [2021-03-12 00:17:39,760 INFO L480 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 488 flow [2021-03-12 00:17:39,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,760 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:39,760 INFO L255 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] [2021-03-12 00:17:39,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-12 00:17:39,760 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:39,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:39,761 INFO L82 PathProgramCache]: Analyzing trace with hash 325735346, now seen corresponding path program 17 times [2021-03-12 00:17:39,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:39,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487166703] [2021-03-12 00:17:39,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:39,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,774 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,775 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,780 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,780 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,787 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,788 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,794 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,803 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,803 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-12 00:17:39,812 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,812 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:39,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487166703] [2021-03-12 00:17:39,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:39,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:17:39,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498575697] [2021-03-12 00:17:39,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:17:39,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:39,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:17:39,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:17:39,814 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 54 [2021-03-12 00:17:39,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 488 flow. Second operand has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:39,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 54 [2021-03-12 00:17:39,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:39,962 INFO L129 PetriNetUnfolder]: 80/580 cut-off events. [2021-03-12 00:17:39,962 INFO L130 PetriNetUnfolder]: For 1029/1113 co-relation queries the response was YES. [2021-03-12 00:17:39,963 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1739 conditions, 580 events. 80/580 cut-off events. For 1029/1113 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5051 event pairs, 12 based on Foata normal form. 30/599 useless extension candidates. Maximal degree in co-relation 1568. Up to 91 conditions per place. [2021-03-12 00:17:39,965 INFO L132 encePairwiseOnDemand]: 45/54 looper letters, 19 selfloop transitions, 15 changer transitions 0/77 dead transitions. [2021-03-12 00:17:39,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 77 transitions, 587 flow [2021-03-12 00:17:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:17:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:17:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 343 transitions. [2021-03-12 00:17:39,966 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7057613168724279 [2021-03-12 00:17:39,966 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 343 transitions. [2021-03-12 00:17:39,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 343 transitions. [2021-03-12 00:17:39,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:39,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 343 transitions. [2021-03-12 00:17:39,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 38.111111111111114) internal successors, (343), 9 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,968 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,968 INFO L185 Difference]: Start difference. First operand has 80 places, 72 transitions, 488 flow. Second operand 9 states and 343 transitions. [2021-03-12 00:17:39,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 77 transitions, 587 flow [2021-03-12 00:17:39,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 77 transitions, 573 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-12 00:17:39,973 INFO L241 Difference]: Finished difference. Result has 88 places, 75 transitions, 538 flow [2021-03-12 00:17:39,973 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=538, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2021-03-12 00:17:39,973 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 55 predicate places. [2021-03-12 00:17:39,973 INFO L480 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 538 flow [2021-03-12 00:17:39,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:39,974 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:39,974 INFO L255 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] [2021-03-12 00:17:39,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-03-12 00:17:39,974 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:39,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:39,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1053317844, now seen corresponding path program 18 times [2021-03-12 00:17:39,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:39,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909944866] [2021-03-12 00:17:39,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:39,984 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,984 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,988 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:39,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:39,994 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,000 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,001 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,007 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,016 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-03-12 00:17:40,016 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-12 00:17:40,025 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:40,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909944866] [2021-03-12 00:17:40,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:40,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:17:40,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437279738] [2021-03-12 00:17:40,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:17:40,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:40,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:17:40,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:17:40,027 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 54 [2021-03-12 00:17:40,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 75 transitions, 538 flow. Second operand has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:40,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 54 [2021-03-12 00:17:40,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:40,157 INFO L129 PetriNetUnfolder]: 68/448 cut-off events. [2021-03-12 00:17:40,157 INFO L130 PetriNetUnfolder]: For 816/874 co-relation queries the response was YES. [2021-03-12 00:17:40,158 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1396 conditions, 448 events. 68/448 cut-off events. For 816/874 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3442 event pairs, 12 based on Foata normal form. 15/450 useless extension candidates. Maximal degree in co-relation 1271. Up to 84 conditions per place. [2021-03-12 00:17:40,160 INFO L132 encePairwiseOnDemand]: 47/54 looper letters, 17 selfloop transitions, 7 changer transitions 6/73 dead transitions. [2021-03-12 00:17:40,160 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 73 transitions, 570 flow [2021-03-12 00:17:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:17:40,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:17:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 339 transitions. [2021-03-12 00:17:40,161 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6975308641975309 [2021-03-12 00:17:40,161 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 339 transitions. [2021-03-12 00:17:40,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 339 transitions. [2021-03-12 00:17:40,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:40,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 339 transitions. [2021-03-12 00:17:40,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 37.666666666666664) internal successors, (339), 9 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,163 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,163 INFO L185 Difference]: Start difference. First operand has 88 places, 75 transitions, 538 flow. Second operand 9 states and 339 transitions. [2021-03-12 00:17:40,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 73 transitions, 570 flow [2021-03-12 00:17:40,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 73 transitions, 541 flow, removed 3 selfloop flow, removed 7 redundant places. [2021-03-12 00:17:40,168 INFO L241 Difference]: Finished difference. Result has 89 places, 65 transitions, 424 flow [2021-03-12 00:17:40,168 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=424, PETRI_PLACES=89, PETRI_TRANSITIONS=65} [2021-03-12 00:17:40,168 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 56 predicate places. [2021-03-12 00:17:40,168 INFO L480 AbstractCegarLoop]: Abstraction has has 89 places, 65 transitions, 424 flow [2021-03-12 00:17:40,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,169 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:40,169 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-12 00:17:40,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-03-12 00:17:40,169 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:40,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1332807924, now seen corresponding path program 19 times [2021-03-12 00:17:40,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:40,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651730775] [2021-03-12 00:17:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:40,179 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,179 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,183 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,184 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,189 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,195 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,202 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,202 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,209 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,210 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-12 00:17:40,218 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,218 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:40,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651730775] [2021-03-12 00:17:40,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:40,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:17:40,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736247833] [2021-03-12 00:17:40,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:17:40,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:40,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:17:40,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:17:40,220 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 54 [2021-03-12 00:17:40,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 65 transitions, 424 flow. Second operand has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:40,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 54 [2021-03-12 00:17:40,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:40,339 INFO L129 PetriNetUnfolder]: 67/419 cut-off events. [2021-03-12 00:17:40,339 INFO L130 PetriNetUnfolder]: For 682/750 co-relation queries the response was YES. [2021-03-12 00:17:40,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 419 events. 67/419 cut-off events. For 682/750 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3222 event pairs, 9 based on Foata normal form. 19/427 useless extension candidates. Maximal degree in co-relation 1242. Up to 120 conditions per place. [2021-03-12 00:17:40,342 INFO L132 encePairwiseOnDemand]: 45/54 looper letters, 14 selfloop transitions, 12 changer transitions 4/71 dead transitions. [2021-03-12 00:17:40,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 71 transitions, 517 flow [2021-03-12 00:17:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:17:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:17:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 303 transitions. [2021-03-12 00:17:40,343 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7013888888888888 [2021-03-12 00:17:40,343 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 303 transitions. [2021-03-12 00:17:40,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 303 transitions. [2021-03-12 00:17:40,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:40,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 303 transitions. [2021-03-12 00:17:40,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 37.875) internal successors, (303), 8 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,345 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,345 INFO L185 Difference]: Start difference. First operand has 89 places, 65 transitions, 424 flow. Second operand 8 states and 303 transitions. [2021-03-12 00:17:40,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 71 transitions, 517 flow [2021-03-12 00:17:40,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 71 transitions, 462 flow, removed 5 selfloop flow, removed 11 redundant places. [2021-03-12 00:17:40,349 INFO L241 Difference]: Finished difference. Result has 78 places, 65 transitions, 411 flow [2021-03-12 00:17:40,349 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=411, PETRI_PLACES=78, PETRI_TRANSITIONS=65} [2021-03-12 00:17:40,349 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 45 predicate places. [2021-03-12 00:17:40,349 INFO L480 AbstractCegarLoop]: Abstraction has has 78 places, 65 transitions, 411 flow [2021-03-12 00:17:40,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,350 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:40,350 INFO L255 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] [2021-03-12 00:17:40,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-03-12 00:17:40,350 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:40,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:40,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1992564214, now seen corresponding path program 20 times [2021-03-12 00:17:40,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:40,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808228457] [2021-03-12 00:17:40,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:40,359 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,359 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,369 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,370 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,376 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,376 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,383 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,383 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,393 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-03-12 00:17:40,394 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,402 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:40,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808228457] [2021-03-12 00:17:40,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:40,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:17:40,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018314618] [2021-03-12 00:17:40,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:17:40,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:40,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:17:40,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:17:40,405 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 54 [2021-03-12 00:17:40,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 65 transitions, 411 flow. Second operand has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:40,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 54 [2021-03-12 00:17:40,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:40,521 INFO L129 PetriNetUnfolder]: 36/331 cut-off events. [2021-03-12 00:17:40,521 INFO L130 PetriNetUnfolder]: For 622/684 co-relation queries the response was YES. [2021-03-12 00:17:40,522 INFO L84 FinitePrefix]: Finished finitePrefix Result has 975 conditions, 331 events. 36/331 cut-off events. For 622/684 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2504 event pairs, 1 based on Foata normal form. 13/342 useless extension candidates. Maximal degree in co-relation 958. Up to 80 conditions per place. [2021-03-12 00:17:40,523 INFO L132 encePairwiseOnDemand]: 46/54 looper letters, 12 selfloop transitions, 10 changer transitions 6/69 dead transitions. [2021-03-12 00:17:40,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 69 transitions, 488 flow [2021-03-12 00:17:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:17:40,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:17:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 299 transitions. [2021-03-12 00:17:40,524 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6921296296296297 [2021-03-12 00:17:40,524 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 299 transitions. [2021-03-12 00:17:40,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 299 transitions. [2021-03-12 00:17:40,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:40,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 299 transitions. [2021-03-12 00:17:40,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 37.375) internal successors, (299), 8 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) [2021-03-12 00:17:40,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,526 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,526 INFO L185 Difference]: Start difference. First operand has 78 places, 65 transitions, 411 flow. Second operand 8 states and 299 transitions. [2021-03-12 00:17:40,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 69 transitions, 488 flow [2021-03-12 00:17:40,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 69 transitions, 470 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-03-12 00:17:40,529 INFO L241 Difference]: Finished difference. Result has 81 places, 60 transitions, 374 flow [2021-03-12 00:17:40,529 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=374, PETRI_PLACES=81, PETRI_TRANSITIONS=60} [2021-03-12 00:17:40,529 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2021-03-12 00:17:40,530 INFO L480 AbstractCegarLoop]: Abstraction has has 81 places, 60 transitions, 374 flow [2021-03-12 00:17:40,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,530 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:40,530 INFO L255 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] [2021-03-12 00:17:40,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-03-12 00:17:40,530 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:40,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:40,530 INFO L82 PathProgramCache]: Analyzing trace with hash 263346908, now seen corresponding path program 21 times [2021-03-12 00:17:40,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:40,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708291784] [2021-03-12 00:17:40,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:40,538 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,539 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:40,541 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,541 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:40,544 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,544 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-12 00:17:40,548 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,549 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,555 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,556 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-12 00:17:40,565 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:40,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708291784] [2021-03-12 00:17:40,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:40,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-12 00:17:40,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165797602] [2021-03-12 00:17:40,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 00:17:40,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:40,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 00:17:40,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-12 00:17:40,567 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 54 [2021-03-12 00:17:40,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 60 transitions, 374 flow. Second operand has 7 states, 7 states have (on average 36.285714285714285) internal successors, (254), 7 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,568 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:40,568 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 54 [2021-03-12 00:17:40,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:40,636 INFO L129 PetriNetUnfolder]: 15/178 cut-off events. [2021-03-12 00:17:40,637 INFO L130 PetriNetUnfolder]: For 541/583 co-relation queries the response was YES. [2021-03-12 00:17:40,637 INFO L84 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 178 events. 15/178 cut-off events. For 541/583 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1081 event pairs, 1 based on Foata normal form. 17/195 useless extension candidates. Maximal degree in co-relation 587. Up to 42 conditions per place. [2021-03-12 00:17:40,638 INFO L132 encePairwiseOnDemand]: 46/54 looper letters, 4 selfloop transitions, 7 changer transitions 12/64 dead transitions. [2021-03-12 00:17:40,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 64 transitions, 446 flow [2021-03-12 00:17:40,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-12 00:17:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-12 00:17:40,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 336 transitions. [2021-03-12 00:17:40,639 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.691358024691358 [2021-03-12 00:17:40,639 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 336 transitions. [2021-03-12 00:17:40,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 336 transitions. [2021-03-12 00:17:40,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:40,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 336 transitions. [2021-03-12 00:17:40,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 37.333333333333336) internal successors, (336), 9 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,641 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,641 INFO L185 Difference]: Start difference. First operand has 81 places, 60 transitions, 374 flow. Second operand 9 states and 336 transitions. [2021-03-12 00:17:40,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 64 transitions, 446 flow [2021-03-12 00:17:40,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 64 transitions, 398 flow, removed 8 selfloop flow, removed 11 redundant places. [2021-03-12 00:17:40,644 INFO L241 Difference]: Finished difference. Result has 74 places, 52 transitions, 309 flow [2021-03-12 00:17:40,644 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=309, PETRI_PLACES=74, PETRI_TRANSITIONS=52} [2021-03-12 00:17:40,644 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 41 predicate places. [2021-03-12 00:17:40,644 INFO L480 AbstractCegarLoop]: Abstraction has has 74 places, 52 transitions, 309 flow [2021-03-12 00:17:40,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 36.285714285714285) internal successors, (254), 7 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,644 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-12 00:17:40,644 INFO L255 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] [2021-03-12 00:17:40,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-03-12 00:17:40,644 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 00:17:40,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 00:17:40,645 INFO L82 PathProgramCache]: Analyzing trace with hash 180507040, now seen corresponding path program 22 times [2021-03-12 00:17:40,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 00:17:40,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895889298] [2021-03-12 00:17:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 00:17:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 00:17:40,657 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,661 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,662 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,673 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,673 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,680 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-12 00:17:40,688 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-03-12 00:17:40,689 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-12 00:17:40,697 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 00:17:40,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-12 00:17:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 00:17:40,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895889298] [2021-03-12 00:17:40,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 00:17:40,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-12 00:17:40,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315745493] [2021-03-12 00:17:40,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 00:17:40,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 00:17:40,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 00:17:40,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-12 00:17:40,700 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 54 [2021-03-12 00:17:40,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 52 transitions, 309 flow. Second operand has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-12 00:17:40,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 54 [2021-03-12 00:17:40,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-12 00:17:40,773 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-03-12 00:17:40,773 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2021-03-12 00:17:40,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 23 events. 0/23 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 1/24 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-12 00:17:40,773 INFO L132 encePairwiseOnDemand]: 47/54 looper letters, 0 selfloop transitions, 0 changer transitions 23/23 dead transitions. [2021-03-12 00:17:40,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 23 transitions, 149 flow [2021-03-12 00:17:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-12 00:17:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-12 00:17:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 288 transitions. [2021-03-12 00:17:40,775 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2021-03-12 00:17:40,775 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 288 transitions. [2021-03-12 00:17:40,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 288 transitions. [2021-03-12 00:17:40,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-12 00:17:40,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 288 transitions. [2021-03-12 00:17:40,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 36.0) internal successors, (288), 8 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,776 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,776 INFO L185 Difference]: Start difference. First operand has 74 places, 52 transitions, 309 flow. Second operand 8 states and 288 transitions. [2021-03-12 00:17:40,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 23 transitions, 149 flow [2021-03-12 00:17:40,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 23 transitions, 102 flow, removed 0 selfloop flow, removed 21 redundant places. [2021-03-12 00:17:40,777 INFO L241 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2021-03-12 00:17:40,777 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2021-03-12 00:17:40,777 INFO L335 CegarLoopForPetriNet]: 33 programPoint places, 12 predicate places. [2021-03-12 00:17:40,777 INFO L480 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2021-03-12 00:17:40,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 36.125) internal successors, (289), 8 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 00:17:40,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-03-12 00:17:40,781 INFO L202 PluginConnector]: Adding new model lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.03 12:17:40 BasicIcfg [2021-03-12 00:17:40,781 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-12 00:17:40,782 INFO L168 Benchmark]: Toolchain (without parser) took 5467.93 ms. Allocated memory was 255.9 MB in the beginning and 421.5 MB in the end (delta: 165.7 MB). Free memory was 236.6 MB in the beginning and 178.1 MB in the end (delta: 58.5 MB). Peak memory consumption was 225.6 MB. Max. memory is 16.0 GB. [2021-03-12 00:17:40,782 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-12 00:17:40,782 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.04 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-12 00:17:40,782 INFO L168 Benchmark]: Boogie Preprocessor took 17.37 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.8 MB in the end (delta: 779.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-03-12 00:17:40,782 INFO L168 Benchmark]: RCFGBuilder took 249.34 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 235.6 MB in the end (delta: -2.0 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.0 GB. [2021-03-12 00:17:40,782 INFO L168 Benchmark]: TraceAbstraction took 5163.45 ms. Allocated memory was 255.9 MB in the beginning and 421.5 MB in the end (delta: 165.7 MB). Free memory was 234.9 MB in the beginning and 178.1 MB in the end (delta: 56.8 MB). Peak memory consumption was 222.0 MB. Max. memory is 16.0 GB. [2021-03-12 00:17:40,783 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.04 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.37 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.8 MB in the end (delta: 779.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 249.34 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 235.6 MB in the end (delta: -2.0 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 5163.45 ms. Allocated memory was 255.9 MB in the beginning and 421.5 MB in the end (delta: 165.7 MB). Free memory was 234.9 MB in the beginning and 178.1 MB in the end (delta: 56.8 MB). Peak memory consumption was 222.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 640.4ms, 46 PlacesBefore, 33 PlacesAfterwards, 36 TransitionsBefore, 23 TransitionsAfterwards, 412 CoEnabledTransitionPairs, 3 FixpointIterations, 5 TrivialSequentialCompositions, 8 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 13 TotalNumberOfCompositions, 1378 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 933, positive: 833, positive conditional: 0, positive unconditional: 833, negative: 100, negative conditional: 0, negative unconditional: 100, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 371, positive: 338, positive conditional: 0, positive unconditional: 338, negative: 33, negative conditional: 0, negative unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 371, positive: 331, positive conditional: 0, positive unconditional: 331, negative: 40, negative conditional: 0, negative unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 40, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 33, negative conditional: 0, negative unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 199, positive: 28, positive conditional: 0, positive unconditional: 28, negative: 171, negative conditional: 0, negative unconditional: 171, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 933, positive: 495, positive conditional: 0, positive unconditional: 495, negative: 67, negative conditional: 0, negative unconditional: 67, unknown: 371, unknown conditional: 0, unknown unconditional: 371] , Statistics on independence cache: Total cache size (in pairs): 165, Positive cache size: 146, Positive conditional cache size: 0, Positive unconditional cache size: 146, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19 - PositiveResult [Line: 71]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 16.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 5085.2ms, OverallIterations: 22, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 3056.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 700.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 129 SDtfs, 314 SDslu, 100 SDs, 0 SdLazy, 1365 SolverSat, 144 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 635.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 226 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1357.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=558occurred in iteration=9, InterpolantAutomatonStates: 183, 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: 26.3ms SsaConstructionTime, 104.8ms SatisfiabilityAnalysisTime, 985.1ms InterpolantComputationTime, 506 NumberOfCodeBlocks, 506 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 484 ConstructedInterpolants, 0 QuantifiedInterpolants, 1840 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 22 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...