/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-OGIterative-CovSimpl.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-13 09:22:35,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-13 09:22:35,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-13 09:22:35,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-13 09:22:35,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-13 09:22:35,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-13 09:22:35,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-13 09:22:35,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-13 09:22:35,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-13 09:22:35,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-13 09:22:35,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-13 09:22:35,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-13 09:22:35,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-13 09:22:35,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-13 09:22:35,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-13 09:22:35,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-13 09:22:35,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-13 09:22:35,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-13 09:22:35,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-13 09:22:35,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-13 09:22:35,260 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-OGIterative-CovSimpl.epf [2021-08-13 09:22:35,286 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-13 09:22:35,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-13 09:22:35,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-13 09:22:35,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-13 09:22:35,287 INFO L138 SettingsManager]: * Use SBE=true [2021-08-13 09:22:35,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-13 09:22:35,288 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-13 09:22:35,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-13 09:22:35,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-13 09:22:35,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-13 09:22:35,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-13 09:22:35,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-13 09:22:35,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-13 09:22:35,288 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-13 09:22:35,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-13 09:22:35,288 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-13 09:22:35,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-13 09:22:35,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-13 09:22:35,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-13 09:22:35,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-13 09:22:35,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-13 09:22:35,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 09:22:35,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-13 09:22:35,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-13 09:22:35,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-13 09:22:35,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-13 09:22:35,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-13 09:22:35,290 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-13 09:22:35,290 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-08-13 09:22:35,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-13 09:22:35,290 INFO L138 SettingsManager]: * Compute cosets for OwickiGries annotation iteratively=true [2021-08-13 09:22:35,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-13 09:22:35,290 INFO L138 SettingsManager]: * Simplify away covered predicates in OwickiGries annotation=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-13 09:22:35,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-13 09:22:35,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-13 09:22:35,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-13 09:22:35,554 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-13 09:22:35,554 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-13 09:22:35,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl [2021-08-13 09:22:35,555 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl' [2021-08-13 09:22:35,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-13 09:22:35,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-13 09:22:35,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-13 09:22:35,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-13 09:22:35,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-13 09:22:35,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 09:22:35" (1/1) ... [2021-08-13 09:22:35,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 09:22:35" (1/1) ... [2021-08-13 09:22:35,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-13 09:22:35,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-13 09:22:35,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-13 09:22:35,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-13 09:22:35,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 09:22:35" (1/1) ... [2021-08-13 09:22:35,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 09:22:35" (1/1) ... [2021-08-13 09:22:35,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 09:22:35" (1/1) ... [2021-08-13 09:22:35,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 09:22:35" (1/1) ... [2021-08-13 09:22:35,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 09:22:35" (1/1) ... [2021-08-13 09:22:35,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 09:22:35" (1/1) ... [2021-08-13 09:22:35,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 09:22:35" (1/1) ... [2021-08-13 09:22:35,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-13 09:22:35,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-13 09:22:35,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-13 09:22:35,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-13 09:22:35,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 09:22:35" (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 [2021-08-13 09:22:35,675 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-13 09:22:35,675 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-13 09:22:35,676 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-13 09:22:35,676 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-13 09:22:35,676 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-13 09:22:35,676 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-13 09:22:35,676 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-13 09:22:35,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-13 09:22:35,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-13 09:22:35,677 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-13 09:22:35,796 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-13 09:22:35,796 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-13 09:22:35,797 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 09:22:35 BoogieIcfgContainer [2021-08-13 09:22:35,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-13 09:22:35,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-13 09:22:35,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-13 09:22:35,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-13 09:22:35,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 09:22:35" (1/2) ... [2021-08-13 09:22:35,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a9b4151 and model type easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.08 09:22:35, skipping insertion in model container [2021-08-13 09:22:35,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 09:22:35" (2/2) ... [2021-08-13 09:22:35,802 INFO L111 eAbstractionObserver]: Analyzing ICFG easy6.wvr.bpl [2021-08-13 09:22:35,805 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-13 09:22:35,805 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-13 09:22:35,806 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-13 09:22:35,840 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-13 09:22:35,854 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-13 09:22:35,868 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 09:22:35,868 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 09:22:35,868 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 09:22:35,868 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 09:22:35,869 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 09:22:35,869 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 09:22:35,869 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 09:22:35,869 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 09:22:35,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 42 places, 35 transitions, 86 flow [2021-08-13 09:22:35,907 INFO L129 PetriNetUnfolder]: 0/33 cut-off events. [2021-08-13 09:22:35,907 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-08-13 09:22:35,909 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 0/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-08-13 09:22:35,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 35 transitions, 86 flow [2021-08-13 09:22:35,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 31 transitions, 74 flow [2021-08-13 09:22:35,931 INFO L129 PetriNetUnfolder]: 0/30 cut-off events. [2021-08-13 09:22:35,931 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-08-13 09:22:35,931 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 09:22:35,932 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 09:22:35,932 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 09:22:35,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 09:22:35,935 INFO L82 PathProgramCache]: Analyzing trace with hash 227240445, now seen corresponding path program 1 times [2021-08-13 09:22:35,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 09:22:35,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414621093] [2021-08-13 09:22:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 09:22:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 09:22:36,044 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:36,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,056 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:36,067 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,068 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:36,076 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,076 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:36,087 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-08-13 09:22:36,087 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:36,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,097 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 09:22:36,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 09:22:36,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414621093] [2021-08-13 09:22:36,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414621093] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 09:22:36,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 09:22:36,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 09:22:36,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055748065] [2021-08-13 09:22:36,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 09:22:36,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 09:22:36,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 09:22:36,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-13 09:22:36,116 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 35 [2021-08-13 09:22:36,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 28.857142857142858) internal successors, (202), 7 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 09:22:36,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 35 [2021-08-13 09:22:36,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 09:22:36,208 INFO L129 PetriNetUnfolder]: 1/63 cut-off events. [2021-08-13 09:22:36,209 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-08-13 09:22:36,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 63 events. 1/63 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 162 event pairs, 0 based on Foata normal form. 1/64 useless extension candidates. Maximal degree in co-relation 64. Up to 5 conditions per place. [2021-08-13 09:22:36,210 INFO L132 encePairwiseOnDemand]: 29/35 looper letters, 7 selfloop transitions, 7 changer transitions 2/41 dead transitions. [2021-08-13 09:22:36,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 126 flow [2021-08-13 09:22:36,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-13 09:22:36,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-08-13 09:22:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2021-08-13 09:22:36,220 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8607142857142858 [2021-08-13 09:22:36,220 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 241 transitions. [2021-08-13 09:22:36,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 241 transitions. [2021-08-13 09:22:36,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 09:22:36,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 241 transitions. [2021-08-13 09:22:36,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 30.125) internal successors, (241), 8 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 35.0) internal successors, (315), 9 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,236 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 35.0) internal successors, (315), 9 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,237 INFO L348 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2021-08-13 09:22:36,237 INFO L482 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 126 flow [2021-08-13 09:22:36,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 28.857142857142858) internal successors, (202), 7 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,237 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 09:22:36,238 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 09:22:36,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-13 09:22:36,238 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 09:22:36,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 09:22:36,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1955713021, now seen corresponding path program 2 times [2021-08-13 09:22:36,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 09:22:36,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097750305] [2021-08-13 09:22:36,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 09:22:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 09:22:36,288 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:36,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,291 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 09:22:36,294 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,294 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 09:22:36,298 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,298 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 09:22:36,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:36,314 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,316 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 09:22:36,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 09:22:36,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 09:22:36,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097750305] [2021-08-13 09:22:36,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097750305] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 09:22:36,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 09:22:36,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-13 09:22:36,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171569490] [2021-08-13 09:22:36,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 09:22:36,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 09:22:36,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 09:22:36,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-13 09:22:36,333 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-08-13 09:22:36,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 126 flow. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 09:22:36,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-08-13 09:22:36,334 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 09:22:36,489 INFO L129 PetriNetUnfolder]: 40/257 cut-off events. [2021-08-13 09:22:36,490 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-08-13 09:22:36,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 257 events. 40/257 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1473 event pairs, 4 based on Foata normal form. 2/255 useless extension candidates. Maximal degree in co-relation 401. Up to 29 conditions per place. [2021-08-13 09:22:36,493 INFO L132 encePairwiseOnDemand]: 26/35 looper letters, 18 selfloop transitions, 17 changer transitions 4/68 dead transitions. [2021-08-13 09:22:36,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 68 transitions, 254 flow [2021-08-13 09:22:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-13 09:22:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-08-13 09:22:36,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2021-08-13 09:22:36,495 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8063492063492064 [2021-08-13 09:22:36,495 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 254 transitions. [2021-08-13 09:22:36,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 254 transitions. [2021-08-13 09:22:36,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 09:22:36,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 254 transitions. [2021-08-13 09:22:36,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 28.22222222222222) internal successors, (254), 9 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) [2021-08-13 09:22:36,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2021-08-13 09:22:36,498 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2021-08-13 09:22:36,498 INFO L348 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2021-08-13 09:22:36,498 INFO L482 AbstractCegarLoop]: Abstraction has has 53 places, 68 transitions, 254 flow [2021-08-13 09:22:36,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,499 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 09:22:36,499 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 09:22:36,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-13 09:22:36,499 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 09:22:36,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 09:22:36,499 INFO L82 PathProgramCache]: Analyzing trace with hash 123548063, now seen corresponding path program 3 times [2021-08-13 09:22:36,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 09:22:36,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725929873] [2021-08-13 09:22:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 09:22:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 09:22:36,509 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,509 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:36,510 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,510 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:36,513 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,514 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 09:22:36,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 09:22:36,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725929873] [2021-08-13 09:22:36,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725929873] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 09:22:36,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 09:22:36,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 09:22:36,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049939642] [2021-08-13 09:22:36,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 09:22:36,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 09:22:36,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 09:22:36,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 09:22:36,516 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2021-08-13 09:22:36,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 68 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 09:22:36,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2021-08-13 09:22:36,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 09:22:36,548 INFO L129 PetriNetUnfolder]: 39/264 cut-off events. [2021-08-13 09:22:36,548 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-08-13 09:22:36,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 264 events. 39/264 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1516 event pairs, 5 based on Foata normal form. 4/262 useless extension candidates. Maximal degree in co-relation 426. Up to 28 conditions per place. [2021-08-13 09:22:36,555 INFO L132 encePairwiseOnDemand]: 32/35 looper letters, 2 selfloop transitions, 2 changer transitions 4/68 dead transitions. [2021-08-13 09:22:36,556 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 68 transitions, 262 flow [2021-08-13 09:22:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 09:22:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 09:22:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2021-08-13 09:22:36,559 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-08-13 09:22:36,559 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2021-08-13 09:22:36,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2021-08-13 09:22:36,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 09:22:36,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2021-08-13 09:22:36,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,561 INFO L348 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2021-08-13 09:22:36,562 INFO L482 AbstractCegarLoop]: Abstraction has has 55 places, 68 transitions, 262 flow [2021-08-13 09:22:36,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,562 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 09:22:36,562 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 09:22:36,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-13 09:22:36,562 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 09:22:36,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 09:22:36,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1481902567, now seen corresponding path program 4 times [2021-08-13 09:22:36,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 09:22:36,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059121711] [2021-08-13 09:22:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 09:22:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 09:22:36,595 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,595 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:36,596 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,596 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 09:22:36,598 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,599 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 09:22:36,601 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,602 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 09:22:36,606 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,606 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:36,613 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,614 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 09:22:36,621 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,622 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 09:22:36,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 09:22:36,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059121711] [2021-08-13 09:22:36,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059121711] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 09:22:36,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 09:22:36,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-13 09:22:36,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23662720] [2021-08-13 09:22:36,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 09:22:36,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 09:22:36,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 09:22:36,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-13 09:22:36,624 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-08-13 09:22:36,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 68 transitions, 262 flow. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 09:22:36,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-08-13 09:22:36,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 09:22:36,726 INFO L129 PetriNetUnfolder]: 30/228 cut-off events. [2021-08-13 09:22:36,726 INFO L130 PetriNetUnfolder]: For 70/92 co-relation queries the response was YES. [2021-08-13 09:22:36,726 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 228 events. 30/228 cut-off events. For 70/92 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1241 event pairs, 1 based on Foata normal form. 11/236 useless extension candidates. Maximal degree in co-relation 462. Up to 35 conditions per place. [2021-08-13 09:22:36,727 INFO L132 encePairwiseOnDemand]: 26/35 looper letters, 21 selfloop transitions, 20 changer transitions 17/87 dead transitions. [2021-08-13 09:22:36,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 450 flow [2021-08-13 09:22:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-13 09:22:36,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-08-13 09:22:36,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2021-08-13 09:22:36,729 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7968253968253968 [2021-08-13 09:22:36,730 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 251 transitions. [2021-08-13 09:22:36,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 251 transitions. [2021-08-13 09:22:36,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 09:22:36,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 251 transitions. [2021-08-13 09:22:36,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 27.88888888888889) internal successors, (251), 9 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2021-08-13 09:22:36,733 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 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) [2021-08-13 09:22:36,733 INFO L348 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2021-08-13 09:22:36,733 INFO L482 AbstractCegarLoop]: Abstraction has has 63 places, 87 transitions, 450 flow [2021-08-13 09:22:36,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,733 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 09:22:36,734 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 09:22:36,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-13 09:22:36,734 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 09:22:36,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 09:22:36,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1182978785, now seen corresponding path program 5 times [2021-08-13 09:22:36,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 09:22:36,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041050907] [2021-08-13 09:22:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 09:22:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 09:22:36,762 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,763 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:36,763 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,765 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:36,767 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,768 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 09:22:36,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 09:22:36,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041050907] [2021-08-13 09:22:36,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041050907] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 09:22:36,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 09:22:36,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 09:22:36,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114399108] [2021-08-13 09:22:36,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 09:22:36,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 09:22:36,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 09:22:36,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 09:22:36,770 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2021-08-13 09:22:36,770 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 87 transitions, 450 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,770 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 09:22:36,770 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2021-08-13 09:22:36,770 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 09:22:36,803 INFO L129 PetriNetUnfolder]: 20/195 cut-off events. [2021-08-13 09:22:36,803 INFO L130 PetriNetUnfolder]: For 53/69 co-relation queries the response was YES. [2021-08-13 09:22:36,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 195 events. 20/195 cut-off events. For 53/69 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1000 event pairs, 2 based on Foata normal form. 3/197 useless extension candidates. Maximal degree in co-relation 402. Up to 27 conditions per place. [2021-08-13 09:22:36,804 INFO L132 encePairwiseOnDemand]: 32/35 looper letters, 2 selfloop transitions, 2 changer transitions 20/85 dead transitions. [2021-08-13 09:22:36,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 446 flow [2021-08-13 09:22:36,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 09:22:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 09:22:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2021-08-13 09:22:36,805 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-08-13 09:22:36,805 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2021-08-13 09:22:36,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2021-08-13 09:22:36,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 09:22:36,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2021-08-13 09:22:36,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,806 INFO L348 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2021-08-13 09:22:36,806 INFO L482 AbstractCegarLoop]: Abstraction has has 65 places, 85 transitions, 446 flow [2021-08-13 09:22:36,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,806 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 09:22:36,806 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 09:22:36,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-13 09:22:36,807 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 09:22:36,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 09:22:36,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1404838709, now seen corresponding path program 6 times [2021-08-13 09:22:36,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 09:22:36,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531151959] [2021-08-13 09:22:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 09:22:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 09:22:36,843 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,844 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:36,845 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,845 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 09:22:36,848 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:36,853 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:36,865 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,865 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:36,873 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:36,895 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,896 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:36,903 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-08-13 09:22:36,905 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 09:22:36,914 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:36,914 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 09:22:36,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 09:22:36,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531151959] [2021-08-13 09:22:36,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531151959] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 09:22:36,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 09:22:36,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-13 09:22:36,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851875274] [2021-08-13 09:22:36,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-13 09:22:36,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 09:22:36,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-13 09:22:36,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-13 09:22:36,917 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-08-13 09:22:36,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 85 transitions, 446 flow. Second operand has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:36,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 09:22:36,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-08-13 09:22:36,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 09:22:37,065 INFO L129 PetriNetUnfolder]: 38/309 cut-off events. [2021-08-13 09:22:37,066 INFO L130 PetriNetUnfolder]: For 236/298 co-relation queries the response was YES. [2021-08-13 09:22:37,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 309 events. 38/309 cut-off events. For 236/298 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1951 event pairs, 2 based on Foata normal form. 9/316 useless extension candidates. Maximal degree in co-relation 755. Up to 46 conditions per place. [2021-08-13 09:22:37,068 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 28 selfloop transitions, 27 changer transitions 24/108 dead transitions. [2021-08-13 09:22:37,068 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 108 transitions, 738 flow [2021-08-13 09:22:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 09:22:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 09:22:37,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 280 transitions. [2021-08-13 09:22:37,070 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8 [2021-08-13 09:22:37,070 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 280 transitions. [2021-08-13 09:22:37,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 280 transitions. [2021-08-13 09:22:37,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 09:22:37,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 280 transitions. [2021-08-13 09:22:37,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:37,071 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:37,071 INFO L348 CegarLoopForPetriNet]: 38 programPoint places, 36 predicate places. [2021-08-13 09:22:37,071 INFO L482 AbstractCegarLoop]: Abstraction has has 74 places, 108 transitions, 738 flow [2021-08-13 09:22:37,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,072 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 09:22:37,072 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 09:22:37,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-13 09:22:37,072 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 09:22:37,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 09:22:37,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1942577855, now seen corresponding path program 7 times [2021-08-13 09:22:37,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 09:22:37,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568935237] [2021-08-13 09:22:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 09:22:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 09:22:37,109 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:37,110 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 09:22:37,112 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,117 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,121 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,122 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,126 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,131 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,132 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,139 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 09:22:37,146 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,146 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 09:22:37,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 09:22:37,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568935237] [2021-08-13 09:22:37,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568935237] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 09:22:37,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 09:22:37,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-13 09:22:37,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093934240] [2021-08-13 09:22:37,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-13 09:22:37,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 09:22:37,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-13 09:22:37,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-13 09:22:37,148 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-08-13 09:22:37,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 108 transitions, 738 flow. Second operand has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 09:22:37,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-08-13 09:22:37,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 09:22:37,290 INFO L129 PetriNetUnfolder]: 29/287 cut-off events. [2021-08-13 09:22:37,290 INFO L130 PetriNetUnfolder]: For 403/487 co-relation queries the response was YES. [2021-08-13 09:22:37,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 287 events. 29/287 cut-off events. For 403/487 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1785 event pairs, 2 based on Foata normal form. 3/289 useless extension candidates. Maximal degree in co-relation 802. Up to 42 conditions per place. [2021-08-13 09:22:37,291 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 27 selfloop transitions, 25 changer transitions 24/105 dead transitions. [2021-08-13 09:22:37,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 105 transitions, 862 flow [2021-08-13 09:22:37,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 09:22:37,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 09:22:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 279 transitions. [2021-08-13 09:22:37,292 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7971428571428572 [2021-08-13 09:22:37,292 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 279 transitions. [2021-08-13 09:22:37,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 279 transitions. [2021-08-13 09:22:37,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 09:22:37,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 279 transitions. [2021-08-13 09:22:37,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 27.9) internal successors, (279), 10 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:37,294 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:37,294 INFO L348 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2021-08-13 09:22:37,294 INFO L482 AbstractCegarLoop]: Abstraction has has 83 places, 105 transitions, 862 flow [2021-08-13 09:22:37,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,294 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 09:22:37,295 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 09:22:37,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-13 09:22:37,295 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 09:22:37,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 09:22:37,295 INFO L82 PathProgramCache]: Analyzing trace with hash -530629941, now seen corresponding path program 8 times [2021-08-13 09:22:37,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 09:22:37,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719117248] [2021-08-13 09:22:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 09:22:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 09:22:37,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,313 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,337 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-08-13 09:22:37,338 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 09:22:37,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 09:22:37,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719117248] [2021-08-13 09:22:37,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719117248] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 09:22:37,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 09:22:37,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 09:22:37,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081499100] [2021-08-13 09:22:37,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 09:22:37,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 09:22:37,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 09:22:37,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-13 09:22:37,347 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 35 [2021-08-13 09:22:37,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 105 transitions, 862 flow. Second operand has 7 states, 7 states have (on average 28.857142857142858) internal successors, (202), 7 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 09:22:37,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 35 [2021-08-13 09:22:37,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 09:22:37,433 INFO L129 PetriNetUnfolder]: 29/281 cut-off events. [2021-08-13 09:22:37,433 INFO L130 PetriNetUnfolder]: For 430/516 co-relation queries the response was YES. [2021-08-13 09:22:37,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 281 events. 29/281 cut-off events. For 430/516 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1753 event pairs, 2 based on Foata normal form. 3/283 useless extension candidates. Maximal degree in co-relation 858. Up to 42 conditions per place. [2021-08-13 09:22:37,434 INFO L132 encePairwiseOnDemand]: 29/35 looper letters, 4 selfloop transitions, 8 changer transitions 51/106 dead transitions. [2021-08-13 09:22:37,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 106 transitions, 900 flow [2021-08-13 09:22:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-13 09:22:37,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-08-13 09:22:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2021-08-13 09:22:37,435 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8571428571428571 [2021-08-13 09:22:37,435 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 240 transitions. [2021-08-13 09:22:37,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 240 transitions. [2021-08-13 09:22:37,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 09:22:37,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 240 transitions. [2021-08-13 09:22:37,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 35.0) internal successors, (315), 9 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,436 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 35.0) internal successors, (315), 9 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,437 INFO L348 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2021-08-13 09:22:37,437 INFO L482 AbstractCegarLoop]: Abstraction has has 90 places, 106 transitions, 900 flow [2021-08-13 09:22:37,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 28.857142857142858) internal successors, (202), 7 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,437 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 09:22:37,437 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 09:22:37,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-13 09:22:37,437 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 09:22:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 09:22:37,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1020076079, now seen corresponding path program 9 times [2021-08-13 09:22:37,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 09:22:37,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378559153] [2021-08-13 09:22:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 09:22:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 09:22:37,459 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,461 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:37,464 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,464 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 09:22:37,466 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,467 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,470 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,471 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,478 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,479 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,483 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,485 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,493 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,493 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,501 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,502 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,511 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,511 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 09:22:37,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 09:22:37,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378559153] [2021-08-13 09:22:37,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378559153] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 09:22:37,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 09:22:37,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-13 09:22:37,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013893051] [2021-08-13 09:22:37,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-13 09:22:37,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 09:22:37,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-13 09:22:37,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-13 09:22:37,517 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-08-13 09:22:37,517 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 106 transitions, 900 flow. Second operand has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,517 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 09:22:37,517 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-08-13 09:22:37,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 09:22:37,628 INFO L129 PetriNetUnfolder]: 28/282 cut-off events. [2021-08-13 09:22:37,629 INFO L130 PetriNetUnfolder]: For 693/813 co-relation queries the response was YES. [2021-08-13 09:22:37,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1037 conditions, 282 events. 28/282 cut-off events. For 693/813 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1751 event pairs, 2 based on Foata normal form. 7/288 useless extension candidates. Maximal degree in co-relation 964. Up to 42 conditions per place. [2021-08-13 09:22:37,630 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 11 selfloop transitions, 15 changer transitions 52/105 dead transitions. [2021-08-13 09:22:37,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 105 transitions, 1036 flow [2021-08-13 09:22:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 09:22:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 09:22:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 282 transitions. [2021-08-13 09:22:37,631 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8057142857142857 [2021-08-13 09:22:37,631 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 282 transitions. [2021-08-13 09:22:37,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 282 transitions. [2021-08-13 09:22:37,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 09:22:37,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 282 transitions. [2021-08-13 09:22:37,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 28.2) internal successors, (282), 10 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:37,632 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:37,632 INFO L348 CegarLoopForPetriNet]: 38 programPoint places, 61 predicate places. [2021-08-13 09:22:37,632 INFO L482 AbstractCegarLoop]: Abstraction has has 99 places, 105 transitions, 1036 flow [2021-08-13 09:22:37,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,633 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 09:22:37,633 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 09:22:37,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-13 09:22:37,633 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 09:22:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 09:22:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1608246209, now seen corresponding path program 10 times [2021-08-13 09:22:37,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 09:22:37,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435664548] [2021-08-13 09:22:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 09:22:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 09:22:37,641 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,641 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:37,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,642 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 09:22:37,644 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,644 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,649 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,650 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,654 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,658 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,681 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,689 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,689 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,698 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-08-13 09:22:37,699 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,706 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,707 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 09:22:37,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 09:22:37,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435664548] [2021-08-13 09:22:37,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435664548] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 09:22:37,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 09:22:37,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-13 09:22:37,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707286987] [2021-08-13 09:22:37,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-13 09:22:37,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 09:22:37,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-13 09:22:37,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-13 09:22:37,708 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-08-13 09:22:37,709 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 105 transitions, 1036 flow. Second operand has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 09:22:37,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-08-13 09:22:37,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 09:22:37,820 INFO L129 PetriNetUnfolder]: 21/236 cut-off events. [2021-08-13 09:22:37,821 INFO L130 PetriNetUnfolder]: For 849/965 co-relation queries the response was YES. [2021-08-13 09:22:37,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 236 events. 21/236 cut-off events. For 849/965 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1361 event pairs, 2 based on Foata normal form. 1/236 useless extension candidates. Maximal degree in co-relation 912. Up to 33 conditions per place. [2021-08-13 09:22:37,821 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 9 selfloop transitions, 7 changer transitions 59/102 dead transitions. [2021-08-13 09:22:37,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 102 transitions, 1140 flow [2021-08-13 09:22:37,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 09:22:37,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 09:22:37,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 281 transitions. [2021-08-13 09:22:37,822 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8028571428571428 [2021-08-13 09:22:37,822 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 281 transitions. [2021-08-13 09:22:37,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 281 transitions. [2021-08-13 09:22:37,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 09:22:37,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 281 transitions. [2021-08-13 09:22:37,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 28.1) internal successors, (281), 10 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:37,824 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:37,824 INFO L348 CegarLoopForPetriNet]: 38 programPoint places, 70 predicate places. [2021-08-13 09:22:37,824 INFO L482 AbstractCegarLoop]: Abstraction has has 108 places, 102 transitions, 1140 flow [2021-08-13 09:22:37,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,824 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 09:22:37,824 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 09:22:37,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-13 09:22:37,825 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 09:22:37,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 09:22:37,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2039470923, now seen corresponding path program 11 times [2021-08-13 09:22:37,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 09:22:37,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234441488] [2021-08-13 09:22:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 09:22:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 09:22:37,838 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,838 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:37,839 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,839 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 09:22:37,841 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,864 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:37,872 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-08-13 09:22:37,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 09:22:37,880 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:37,880 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 09:22:37,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 09:22:37,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234441488] [2021-08-13 09:22:37,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234441488] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 09:22:37,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 09:22:37,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-13 09:22:37,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177054154] [2021-08-13 09:22:37,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-13 09:22:37,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 09:22:37,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-13 09:22:37,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-13 09:22:37,883 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-08-13 09:22:37,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 102 transitions, 1140 flow. Second operand has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:37,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 09:22:37,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-08-13 09:22:37,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 09:22:37,998 INFO L129 PetriNetUnfolder]: 30/272 cut-off events. [2021-08-13 09:22:37,999 INFO L130 PetriNetUnfolder]: For 1426/1554 co-relation queries the response was YES. [2021-08-13 09:22:37,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1239 conditions, 272 events. 30/272 cut-off events. For 1426/1554 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1631 event pairs, 2 based on Foata normal form. 11/282 useless extension candidates. Maximal degree in co-relation 1170. Up to 45 conditions per place. [2021-08-13 09:22:38,000 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 8 selfloop transitions, 12 changer transitions 64/111 dead transitions. [2021-08-13 09:22:38,000 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 111 transitions, 1424 flow [2021-08-13 09:22:38,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 09:22:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 09:22:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 281 transitions. [2021-08-13 09:22:38,001 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8028571428571428 [2021-08-13 09:22:38,001 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 281 transitions. [2021-08-13 09:22:38,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 281 transitions. [2021-08-13 09:22:38,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 09:22:38,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 281 transitions. [2021-08-13 09:22:38,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 28.1) internal successors, (281), 10 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:38,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:38,002 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:38,002 INFO L348 CegarLoopForPetriNet]: 38 programPoint places, 79 predicate places. [2021-08-13 09:22:38,002 INFO L482 AbstractCegarLoop]: Abstraction has has 117 places, 111 transitions, 1424 flow [2021-08-13 09:22:38,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:38,003 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 09:22:38,003 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 09:22:38,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-13 09:22:38,003 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 09:22:38,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 09:22:38,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1714403733, now seen corresponding path program 12 times [2021-08-13 09:22:38,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 09:22:38,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027948332] [2021-08-13 09:22:38,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 09:22:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 09:22:38,012 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,016 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:38,016 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,016 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 09:22:38,018 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,019 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,028 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,028 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,033 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,033 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,039 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,040 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,047 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,047 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 09:22:38,058 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,058 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 09:22:38,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 09:22:38,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027948332] [2021-08-13 09:22:38,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027948332] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 09:22:38,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 09:22:38,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-13 09:22:38,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671476906] [2021-08-13 09:22:38,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-13 09:22:38,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 09:22:38,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-13 09:22:38,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-13 09:22:38,060 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-08-13 09:22:38,060 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 111 transitions, 1424 flow. Second operand has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:38,060 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 09:22:38,060 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-08-13 09:22:38,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 09:22:38,192 INFO L129 PetriNetUnfolder]: 21/250 cut-off events. [2021-08-13 09:22:38,192 INFO L130 PetriNetUnfolder]: For 1544/1634 co-relation queries the response was YES. [2021-08-13 09:22:38,192 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1231 conditions, 250 events. 21/250 cut-off events. For 1544/1634 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1483 event pairs, 2 based on Foata normal form. 5/254 useless extension candidates. Maximal degree in co-relation 1159. Up to 36 conditions per place. [2021-08-13 09:22:38,193 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 7 selfloop transitions, 7 changer transitions 67/108 dead transitions. [2021-08-13 09:22:38,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 108 transitions, 1528 flow [2021-08-13 09:22:38,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 09:22:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 09:22:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 280 transitions. [2021-08-13 09:22:38,194 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8 [2021-08-13 09:22:38,194 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 280 transitions. [2021-08-13 09:22:38,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 280 transitions. [2021-08-13 09:22:38,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 09:22:38,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 280 transitions. [2021-08-13 09:22:38,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:38,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:38,196 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:38,196 INFO L348 CegarLoopForPetriNet]: 38 programPoint places, 88 predicate places. [2021-08-13 09:22:38,197 INFO L482 AbstractCegarLoop]: Abstraction has has 126 places, 108 transitions, 1528 flow [2021-08-13 09:22:38,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:38,197 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 09:22:38,197 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 09:22:38,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-13 09:22:38,197 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 09:22:38,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 09:22:38,197 INFO L82 PathProgramCache]: Analyzing trace with hash 773312577, now seen corresponding path program 13 times [2021-08-13 09:22:38,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 09:22:38,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358476989] [2021-08-13 09:22:38,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 09:22:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 09:22:38,209 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,209 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:38,209 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,210 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 09:22:38,212 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,213 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,219 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,219 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,223 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,225 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,230 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,236 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,236 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,250 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,251 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 09:22:38,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 09:22:38,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358476989] [2021-08-13 09:22:38,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358476989] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 09:22:38,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 09:22:38,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-13 09:22:38,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610034893] [2021-08-13 09:22:38,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-13 09:22:38,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 09:22:38,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-13 09:22:38,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-13 09:22:38,252 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-08-13 09:22:38,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 108 transitions, 1528 flow. Second operand has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:38,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 09:22:38,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-08-13 09:22:38,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 09:22:38,363 INFO L129 PetriNetUnfolder]: 20/251 cut-off events. [2021-08-13 09:22:38,363 INFO L130 PetriNetUnfolder]: For 1930/2012 co-relation queries the response was YES. [2021-08-13 09:22:38,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1324 conditions, 251 events. 20/251 cut-off events. For 1930/2012 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1495 event pairs, 2 based on Foata normal form. 9/259 useless extension candidates. Maximal degree in co-relation 1249. Up to 36 conditions per place. [2021-08-13 09:22:38,364 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 2 selfloop transitions, 10 changer transitions 69/107 dead transitions. [2021-08-13 09:22:38,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 107 transitions, 1660 flow [2021-08-13 09:22:38,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 09:22:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 09:22:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 279 transitions. [2021-08-13 09:22:38,365 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7971428571428572 [2021-08-13 09:22:38,365 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 279 transitions. [2021-08-13 09:22:38,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 279 transitions. [2021-08-13 09:22:38,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 09:22:38,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 279 transitions. [2021-08-13 09:22:38,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 27.9) internal successors, (279), 10 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:38,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:38,367 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:38,367 INFO L348 CegarLoopForPetriNet]: 38 programPoint places, 97 predicate places. [2021-08-13 09:22:38,367 INFO L482 AbstractCegarLoop]: Abstraction has has 135 places, 107 transitions, 1660 flow [2021-08-13 09:22:38,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:38,367 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 09:22:38,367 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 09:22:38,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-13 09:22:38,367 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 09:22:38,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 09:22:38,368 INFO L82 PathProgramCache]: Analyzing trace with hash -645640009, now seen corresponding path program 14 times [2021-08-13 09:22:38,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 09:22:38,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76085964] [2021-08-13 09:22:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 09:22:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 09:22:38,375 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,375 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:38,376 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,377 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 09:22:38,379 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,379 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,384 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,385 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,389 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,395 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,395 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,402 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,412 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-08-13 09:22:38,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 09:22:38,420 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 09:22:38,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 09:22:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 09:22:38,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 09:22:38,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76085964] [2021-08-13 09:22:38,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76085964] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 09:22:38,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 09:22:38,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-13 09:22:38,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946579381] [2021-08-13 09:22:38,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-13 09:22:38,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 09:22:38,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-13 09:22:38,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-13 09:22:38,422 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-08-13 09:22:38,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 107 transitions, 1660 flow. Second operand has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:38,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 09:22:38,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-08-13 09:22:38,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 09:22:38,523 INFO L129 PetriNetUnfolder]: 13/205 cut-off events. [2021-08-13 09:22:38,523 INFO L130 PetriNetUnfolder]: For 1880/1910 co-relation queries the response was YES. [2021-08-13 09:22:38,524 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1191 conditions, 205 events. 13/205 cut-off events. For 1880/1910 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1161 event pairs, 2 based on Foata normal form. 3/207 useless extension candidates. Maximal degree in co-relation 1125. Up to 26 conditions per place. [2021-08-13 09:22:38,524 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 0 selfloop transitions, 0 changer transitions 95/95 dead transitions. [2021-08-13 09:22:38,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 95 transitions, 1694 flow [2021-08-13 09:22:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 09:22:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 09:22:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 278 transitions. [2021-08-13 09:22:38,525 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7942857142857143 [2021-08-13 09:22:38,525 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 278 transitions. [2021-08-13 09:22:38,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 278 transitions. [2021-08-13 09:22:38,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 09:22:38,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 278 transitions. [2021-08-13 09:22:38,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:38,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:38,526 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 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) [2021-08-13 09:22:38,526 INFO L348 CegarLoopForPetriNet]: 38 programPoint places, 102 predicate places. [2021-08-13 09:22:38,527 INFO L482 AbstractCegarLoop]: Abstraction has has 140 places, 95 transitions, 1694 flow [2021-08-13 09:22:38,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 25.11111111111111) internal successors, (226), 9 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 09:22:38,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown