/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-13 11:30:19,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-13 11:30:19,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-13 11:30:19,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-13 11:30:19,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-13 11:30:19,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-13 11:30:19,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-13 11:30:19,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-13 11:30:19,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-13 11:30:19,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-13 11:30:19,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-13 11:30:19,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-13 11:30:19,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-13 11:30:19,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-13 11:30:19,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-13 11:30:19,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-13 11:30:19,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-13 11:30:19,087 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-06-13 11:30:19,137 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-13 11:30:19,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-13 11:30:19,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-13 11:30:19,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-13 11:30:19,140 INFO L138 SettingsManager]: * Use SBE=true [2021-06-13 11:30:19,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-13 11:30:19,141 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-13 11:30:19,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-13 11:30:19,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-13 11:30:19,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-13 11:30:19,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-13 11:30:19,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-13 11:30:19,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-13 11:30:19,142 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-13 11:30:19,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-13 11:30:19,143 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-13 11:30:19,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-13 11:30:19,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-13 11:30:19,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-13 11:30:19,143 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-13 11:30:19,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-13 11:30:19,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 11:30:19,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-13 11:30:19,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-13 11:30:19,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-13 11:30:19,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-13 11:30:19,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-13 11:30:19,144 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-13 11:30:19,144 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-13 11:30:19,145 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-13 11:30:19,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-13 11:30:19,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-13 11:30:19,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-13 11:30:19,491 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-13 11:30:19,492 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-13 11:30:19,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl [2021-06-13 11:30:19,492 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl' [2021-06-13 11:30:19,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-13 11:30:19,518 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-13 11:30:19,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-13 11:30:19,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-13 11:30:19,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-13 11:30:19,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:19" (1/1) ... [2021-06-13 11:30:19,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:19" (1/1) ... [2021-06-13 11:30:19,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-13 11:30:19,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-13 11:30:19,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-13 11:30:19,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-13 11:30:19,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:19" (1/1) ... [2021-06-13 11:30:19,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:19" (1/1) ... [2021-06-13 11:30:19,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:19" (1/1) ... [2021-06-13 11:30:19,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:19" (1/1) ... [2021-06-13 11:30:19,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:19" (1/1) ... [2021-06-13 11:30:19,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:19" (1/1) ... [2021-06-13 11:30:19,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:19" (1/1) ... [2021-06-13 11:30:19,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-13 11:30:19,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-13 11:30:19,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-13 11:30:19,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-13 11:30:19,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 11:30:19,636 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-13 11:30:19,636 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-13 11:30:19,636 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-13 11:30:19,636 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-13 11:30:19,636 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-13 11:30:19,636 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-13 11:30:19,637 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-13 11:30:19,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-13 11:30:19,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-13 11:30:19,638 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-13 11:30:19,792 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-13 11:30:19,793 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-13 11:30:19,794 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 11:30:19 BoogieIcfgContainer [2021-06-13 11:30:19,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-13 11:30:19,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-13 11:30:19,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-13 11:30:19,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-13 11:30:19,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 11:30:19" (1/2) ... [2021-06-13 11:30:19,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a5ef45 and model type easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 11:30:19, skipping insertion in model container [2021-06-13 11:30:19,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 11:30:19" (2/2) ... [2021-06-13 11:30:19,801 INFO L111 eAbstractionObserver]: Analyzing ICFG easy6.wvr.bpl [2021-06-13 11:30:19,805 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-13 11:30:19,805 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-13 11:30:19,806 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-13 11:30:19,837 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-13 11:30:19,856 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-13 11:30:19,874 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 11:30:19,874 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 11:30:19,874 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 11:30:19,874 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 11:30:19,875 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 11:30:19,875 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 11:30:19,875 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 11:30:19,875 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-13 11:30:19,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 42 places, 35 transitions, 86 flow [2021-06-13 11:30:19,942 INFO L129 PetriNetUnfolder]: 0/33 cut-off events. [2021-06-13 11:30:19,942 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-13 11:30:19,944 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. [2021-06-13 11:30:19,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 35 transitions, 86 flow [2021-06-13 11:30:19,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 31 transitions, 74 flow [2021-06-13 11:30:19,979 INFO L129 PetriNetUnfolder]: 0/30 cut-off events. [2021-06-13 11:30:19,979 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-13 11:30:19,979 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:19,980 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:19,997 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:20,002 INFO L82 PathProgramCache]: Analyzing trace with hash 227240445, now seen corresponding path program 1 times [2021-06-13 11:30:20,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:20,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107592406] [2021-06-13 11:30:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:20,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,247 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:20,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:20,276 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,277 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:20,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,292 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:20,310 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-06-13 11:30:20,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:20,327 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,327 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:20,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:20,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107592406] [2021-06-13 11:30:20,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107592406] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:20,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:20,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-13 11:30:20,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532861022] [2021-06-13 11:30:20,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 11:30:20,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:20,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 11:30:20,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 11:30:20,365 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 35 [2021-06-13 11:30:20,369 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) [2021-06-13 11:30:20,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:20,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 35 [2021-06-13 11:30:20,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:20,566 INFO L129 PetriNetUnfolder]: 1/63 cut-off events. [2021-06-13 11:30:20,566 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-06-13 11:30:20,567 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 160 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. [2021-06-13 11:30:20,571 INFO L132 encePairwiseOnDemand]: 29/35 looper letters, 7 selfloop transitions, 7 changer transitions 2/41 dead transitions. [2021-06-13 11:30:20,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 126 flow [2021-06-13 11:30:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-13 11:30:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-13 11:30:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2021-06-13 11:30:20,582 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8607142857142858 [2021-06-13 11:30:20,583 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 241 transitions. [2021-06-13 11:30:20,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 241 transitions. [2021-06-13 11:30:20,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:20,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 241 transitions. [2021-06-13 11:30:20,594 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) [2021-06-13 11:30:20,603 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) [2021-06-13 11:30:20,603 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) [2021-06-13 11:30:20,605 INFO L185 Difference]: Start difference. First operand has 38 places, 31 transitions, 74 flow. Second operand 8 states and 241 transitions. [2021-06-13 11:30:20,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 126 flow [2021-06-13 11:30:20,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 118 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-13 11:30:20,614 INFO L241 Difference]: Finished difference. Result has 44 places, 36 transitions, 104 flow [2021-06-13 11:30:20,616 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2021-06-13 11:30:20,617 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2021-06-13 11:30:20,617 INFO L482 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 104 flow [2021-06-13 11:30:20,617 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) [2021-06-13 11:30:20,617 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:20,618 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:20,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-13 11:30:20,618 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:20,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1422356439, now seen corresponding path program 2 times [2021-06-13 11:30:20,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:20,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421386969] [2021-06-13 11:30:20,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:20,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:20,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 11:30:20,670 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 11:30:20,674 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 11:30:20,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:20,688 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,688 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 11:30:20,697 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:20,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:20,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421386969] [2021-06-13 11:30:20,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421386969] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:20,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:20,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-13 11:30:20,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849549443] [2021-06-13 11:30:20,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 11:30:20,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:20,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 11:30:20,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-13 11:30:20,702 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-13 11:30:20,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 104 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) [2021-06-13 11:30:20,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:20,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-13 11:30:20,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:20,882 INFO L129 PetriNetUnfolder]: 33/232 cut-off events. [2021-06-13 11:30:20,882 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-13 11:30:20,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 232 events. 33/232 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1286 event pairs, 4 based on Foata normal form. 2/229 useless extension candidates. Maximal degree in co-relation 372. Up to 25 conditions per place. [2021-06-13 11:30:20,885 INFO L132 encePairwiseOnDemand]: 26/35 looper letters, 17 selfloop transitions, 13 changer transitions 7/63 dead transitions. [2021-06-13 11:30:20,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 63 transitions, 232 flow [2021-06-13 11:30:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-13 11:30:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-13 11:30:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2021-06-13 11:30:20,888 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8063492063492064 [2021-06-13 11:30:20,888 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 254 transitions. [2021-06-13 11:30:20,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 254 transitions. [2021-06-13 11:30:20,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:20,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 254 transitions. [2021-06-13 11:30:20,889 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) [2021-06-13 11:30:20,890 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) [2021-06-13 11:30:20,891 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) [2021-06-13 11:30:20,891 INFO L185 Difference]: Start difference. First operand has 44 places, 36 transitions, 104 flow. Second operand 9 states and 254 transitions. [2021-06-13 11:30:20,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 63 transitions, 232 flow [2021-06-13 11:30:20,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 63 transitions, 230 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-06-13 11:30:20,895 INFO L241 Difference]: Finished difference. Result has 56 places, 48 transitions, 199 flow [2021-06-13 11:30:20,896 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=199, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2021-06-13 11:30:20,896 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2021-06-13 11:30:20,896 INFO L482 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 199 flow [2021-06-13 11:30:20,897 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) [2021-06-13 11:30:20,897 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:20,897 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:20,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-13 11:30:20,897 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:20,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:20,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1266626549, now seen corresponding path program 3 times [2021-06-13 11:30:20,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:20,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158550643] [2021-06-13 11:30:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:20,951 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:20,958 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:20,970 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:20,978 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:20,987 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-06-13 11:30:20,987 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:20,997 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:20,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:21,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:21,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158550643] [2021-06-13 11:30:21,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158550643] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:21,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:21,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-13 11:30:21,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131997923] [2021-06-13 11:30:21,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 11:30:21,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:21,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 11:30:21,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 11:30:21,004 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 35 [2021-06-13 11:30:21,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 199 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) [2021-06-13 11:30:21,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:21,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 35 [2021-06-13 11:30:21,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:21,117 INFO L129 PetriNetUnfolder]: 19/183 cut-off events. [2021-06-13 11:30:21,117 INFO L130 PetriNetUnfolder]: For 87/93 co-relation queries the response was YES. [2021-06-13 11:30:21,118 INFO L84 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 183 events. 19/183 cut-off events. For 87/93 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 919 event pairs, 2 based on Foata normal form. 8/188 useless extension candidates. Maximal degree in co-relation 357. Up to 19 conditions per place. [2021-06-13 11:30:21,119 INFO L132 encePairwiseOnDemand]: 29/35 looper letters, 4 selfloop transitions, 7 changer transitions 3/51 dead transitions. [2021-06-13 11:30:21,119 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 239 flow [2021-06-13 11:30:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-13 11:30:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-13 11:30:21,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2021-06-13 11:30:21,121 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.85 [2021-06-13 11:30:21,121 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 238 transitions. [2021-06-13 11:30:21,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 238 transitions. [2021-06-13 11:30:21,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:21,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 238 transitions. [2021-06-13 11:30:21,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 29.75) internal successors, (238), 8 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:21,123 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) [2021-06-13 11:30:21,123 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) [2021-06-13 11:30:21,123 INFO L185 Difference]: Start difference. First operand has 56 places, 48 transitions, 199 flow. Second operand 8 states and 238 transitions. [2021-06-13 11:30:21,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 239 flow [2021-06-13 11:30:21,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 51 transitions, 237 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-06-13 11:30:21,128 INFO L241 Difference]: Finished difference. Result has 61 places, 46 transitions, 205 flow [2021-06-13 11:30:21,129 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=205, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2021-06-13 11:30:21,129 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2021-06-13 11:30:21,129 INFO L482 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 205 flow [2021-06-13 11:30:21,129 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) [2021-06-13 11:30:21,129 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:21,129 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:21,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-13 11:30:21,130 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:21,130 INFO L82 PathProgramCache]: Analyzing trace with hash 71816639, now seen corresponding path program 4 times [2021-06-13 11:30:21,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:21,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395561830] [2021-06-13 11:30:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:21,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,142 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:21,142 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,143 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:21,145 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:21,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:21,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395561830] [2021-06-13 11:30:21,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395561830] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:21,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:21,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-13 11:30:21,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769020996] [2021-06-13 11:30:21,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 11:30:21,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:21,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 11:30:21,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 11:30:21,148 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2021-06-13 11:30:21,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 46 transitions, 205 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) [2021-06-13 11:30:21,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:21,148 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2021-06-13 11:30:21,148 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:21,161 INFO L129 PetriNetUnfolder]: 6/107 cut-off events. [2021-06-13 11:30:21,161 INFO L130 PetriNetUnfolder]: For 34/36 co-relation queries the response was YES. [2021-06-13 11:30:21,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 107 events. 6/107 cut-off events. For 34/36 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 386 event pairs, 0 based on Foata normal form. 3/108 useless extension candidates. Maximal degree in co-relation 210. Up to 11 conditions per place. [2021-06-13 11:30:21,164 INFO L132 encePairwiseOnDemand]: 32/35 looper letters, 2 selfloop transitions, 2 changer transitions 2/45 dead transitions. [2021-06-13 11:30:21,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 45 transitions, 207 flow [2021-06-13 11:30:21,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 11:30:21,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 11:30:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2021-06-13 11:30:21,166 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-06-13 11:30:21,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2021-06-13 11:30:21,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2021-06-13 11:30:21,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:21,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2021-06-13 11:30:21,167 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) [2021-06-13 11:30:21,168 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) [2021-06-13 11:30:21,169 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) [2021-06-13 11:30:21,169 INFO L185 Difference]: Start difference. First operand has 61 places, 46 transitions, 205 flow. Second operand 3 states and 95 transitions. [2021-06-13 11:30:21,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 45 transitions, 207 flow [2021-06-13 11:30:21,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 177 flow, removed 5 selfloop flow, removed 10 redundant places. [2021-06-13 11:30:21,178 INFO L241 Difference]: Finished difference. Result has 52 places, 43 transitions, 165 flow [2021-06-13 11:30:21,178 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2021-06-13 11:30:21,178 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2021-06-13 11:30:21,179 INFO L482 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 165 flow [2021-06-13 11:30:21,179 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) [2021-06-13 11:30:21,179 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:21,179 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:21,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-13 11:30:21,179 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:21,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1985255709, now seen corresponding path program 5 times [2021-06-13 11:30:21,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:21,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156546371] [2021-06-13 11:30:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:21,216 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,216 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:21,217 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 11:30:21,220 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,220 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,226 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,226 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,232 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,233 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,240 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,252 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,265 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,266 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,275 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,276 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:21,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:21,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156546371] [2021-06-13 11:30:21,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156546371] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:21,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:21,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-13 11:30:21,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560650544] [2021-06-13 11:30:21,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-13 11:30:21,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:21,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-13 11:30:21,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-13 11:30:21,279 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-13 11:30:21,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 165 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) [2021-06-13 11:30:21,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:21,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-13 11:30:21,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:21,415 INFO L129 PetriNetUnfolder]: 25/221 cut-off events. [2021-06-13 11:30:21,415 INFO L130 PetriNetUnfolder]: For 135/143 co-relation queries the response was YES. [2021-06-13 11:30:21,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 221 events. 25/221 cut-off events. For 135/143 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1216 event pairs, 0 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 264. Up to 27 conditions per place. [2021-06-13 11:30:21,417 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 21 selfloop transitions, 18 changer transitions 3/66 dead transitions. [2021-06-13 11:30:21,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 66 transitions, 359 flow [2021-06-13 11:30:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-13 11:30:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-13 11:30:21,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 272 transitions. [2021-06-13 11:30:21,418 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7771428571428571 [2021-06-13 11:30:21,419 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 272 transitions. [2021-06-13 11:30:21,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 272 transitions. [2021-06-13 11:30:21,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:21,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 272 transitions. [2021-06-13 11:30:21,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 27.2) internal successors, (272), 10 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:21,420 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) [2021-06-13 11:30:21,421 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) [2021-06-13 11:30:21,421 INFO L185 Difference]: Start difference. First operand has 52 places, 43 transitions, 165 flow. Second operand 10 states and 272 transitions. [2021-06-13 11:30:21,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 66 transitions, 359 flow [2021-06-13 11:30:21,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 355 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-13 11:30:21,424 INFO L241 Difference]: Finished difference. Result has 64 places, 53 transitions, 288 flow [2021-06-13 11:30:21,424 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=288, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2021-06-13 11:30:21,424 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2021-06-13 11:30:21,424 INFO L482 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 288 flow [2021-06-13 11:30:21,425 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) [2021-06-13 11:30:21,425 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:21,425 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:21,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-13 11:30:21,425 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:21,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:21,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1856594967, now seen corresponding path program 6 times [2021-06-13 11:30:21,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:21,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166554091] [2021-06-13 11:30:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:21,452 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,452 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:21,453 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,453 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:21,456 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,456 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:21,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:21,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166554091] [2021-06-13 11:30:21,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166554091] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:21,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:21,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-13 11:30:21,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711032551] [2021-06-13 11:30:21,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 11:30:21,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:21,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 11:30:21,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 11:30:21,459 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2021-06-13 11:30:21,459 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 288 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) [2021-06-13 11:30:21,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:21,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2021-06-13 11:30:21,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:21,477 INFO L129 PetriNetUnfolder]: 12/168 cut-off events. [2021-06-13 11:30:21,477 INFO L130 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2021-06-13 11:30:21,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 392 conditions, 168 events. 12/168 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 831 event pairs, 1 based on Foata normal form. 4/169 useless extension candidates. Maximal degree in co-relation 193. Up to 17 conditions per place. [2021-06-13 11:30:21,478 INFO L132 encePairwiseOnDemand]: 32/35 looper letters, 2 selfloop transitions, 2 changer transitions 1/52 dead transitions. [2021-06-13 11:30:21,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 52 transitions, 286 flow [2021-06-13 11:30:21,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 11:30:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 11:30:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2021-06-13 11:30:21,479 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-06-13 11:30:21,479 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2021-06-13 11:30:21,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2021-06-13 11:30:21,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:21,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2021-06-13 11:30:21,480 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) [2021-06-13 11:30:21,480 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) [2021-06-13 11:30:21,481 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) [2021-06-13 11:30:21,481 INFO L185 Difference]: Start difference. First operand has 64 places, 53 transitions, 288 flow. Second operand 3 states and 95 transitions. [2021-06-13 11:30:21,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 52 transitions, 286 flow [2021-06-13 11:30:21,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 277 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-06-13 11:30:21,484 INFO L241 Difference]: Finished difference. Result has 64 places, 51 transitions, 273 flow [2021-06-13 11:30:21,484 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2021-06-13 11:30:21,484 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2021-06-13 11:30:21,484 INFO L482 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 273 flow [2021-06-13 11:30:21,484 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) [2021-06-13 11:30:21,485 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:21,485 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:21,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-13 11:30:21,485 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:21,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:21,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1391376941, now seen corresponding path program 7 times [2021-06-13 11:30:21,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:21,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057733742] [2021-06-13 11:30:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:21,503 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:21,504 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,504 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 11:30:21,507 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,507 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,513 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,522 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,523 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,531 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,533 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,542 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,543 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,555 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,555 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 11:30:21,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,568 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:21,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:21,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057733742] [2021-06-13 11:30:21,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057733742] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:21,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:21,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-13 11:30:21,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718388233] [2021-06-13 11:30:21,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-13 11:30:21,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:21,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-13 11:30:21,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-13 11:30:21,574 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-13 11:30:21,575 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 273 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) [2021-06-13 11:30:21,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:21,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-13 11:30:21,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:21,743 INFO L129 PetriNetUnfolder]: 18/196 cut-off events. [2021-06-13 11:30:21,743 INFO L130 PetriNetUnfolder]: For 267/269 co-relation queries the response was YES. [2021-06-13 11:30:21,744 INFO L84 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 196 events. 18/196 cut-off events. For 267/269 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1004 event pairs, 3 based on Foata normal form. 1/197 useless extension candidates. Maximal degree in co-relation 271. Up to 20 conditions per place. [2021-06-13 11:30:21,745 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 21 selfloop transitions, 21 changer transitions 0/65 dead transitions. [2021-06-13 11:30:21,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 444 flow [2021-06-13 11:30:21,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-13 11:30:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-13 11:30:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 275 transitions. [2021-06-13 11:30:21,746 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-06-13 11:30:21,746 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 275 transitions. [2021-06-13 11:30:21,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 275 transitions. [2021-06-13 11:30:21,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:21,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 275 transitions. [2021-06-13 11:30:21,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 27.5) internal successors, (275), 10 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:21,748 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) [2021-06-13 11:30:21,749 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) [2021-06-13 11:30:21,749 INFO L185 Difference]: Start difference. First operand has 64 places, 51 transitions, 273 flow. Second operand 10 states and 275 transitions. [2021-06-13 11:30:21,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 444 flow [2021-06-13 11:30:21,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 438 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-06-13 11:30:21,753 INFO L241 Difference]: Finished difference. Result has 76 places, 60 transitions, 406 flow [2021-06-13 11:30:21,753 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=406, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2021-06-13 11:30:21,753 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 38 predicate places. [2021-06-13 11:30:21,753 INFO L482 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 406 flow [2021-06-13 11:30:21,753 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) [2021-06-13 11:30:21,754 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:21,754 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:21,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-13 11:30:21,754 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:21,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:21,754 INFO L82 PathProgramCache]: Analyzing trace with hash 160575997, now seen corresponding path program 8 times [2021-06-13 11:30:21,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:21,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113863146] [2021-06-13 11:30:21,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:21,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,771 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:21,772 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 11:30:21,775 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,776 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,782 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,792 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,799 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,800 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,810 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,811 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:21,822 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-06-13 11:30:21,823 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 11:30:21,836 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:21,838 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:21,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:21,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113863146] [2021-06-13 11:30:21,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113863146] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:21,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:21,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-13 11:30:21,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994666995] [2021-06-13 11:30:21,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-13 11:30:21,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:21,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-13 11:30:21,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-13 11:30:21,841 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-13 11:30:21,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 406 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) [2021-06-13 11:30:21,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:21,842 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-13 11:30:21,842 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:22,015 INFO L129 PetriNetUnfolder]: 14/186 cut-off events. [2021-06-13 11:30:22,015 INFO L130 PetriNetUnfolder]: For 431/433 co-relation queries the response was YES. [2021-06-13 11:30:22,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 186 events. 14/186 cut-off events. For 431/433 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 952 event pairs, 3 based on Foata normal form. 1/187 useless extension candidates. Maximal degree in co-relation 441. Up to 20 conditions per place. [2021-06-13 11:30:22,017 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 20 selfloop transitions, 16 changer transitions 4/63 dead transitions. [2021-06-13 11:30:22,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 63 transitions, 505 flow [2021-06-13 11:30:22,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-13 11:30:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-13 11:30:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2021-06-13 11:30:22,018 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.78 [2021-06-13 11:30:22,018 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 273 transitions. [2021-06-13 11:30:22,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 273 transitions. [2021-06-13 11:30:22,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:22,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 273 transitions. [2021-06-13 11:30:22,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 27.3) internal successors, (273), 10 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:22,020 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) [2021-06-13 11:30:22,020 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) [2021-06-13 11:30:22,021 INFO L185 Difference]: Start difference. First operand has 76 places, 60 transitions, 406 flow. Second operand 10 states and 273 transitions. [2021-06-13 11:30:22,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 63 transitions, 505 flow [2021-06-13 11:30:22,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 63 transitions, 448 flow, removed 9 selfloop flow, removed 5 redundant places. [2021-06-13 11:30:22,025 INFO L241 Difference]: Finished difference. Result has 81 places, 55 transitions, 339 flow [2021-06-13 11:30:22,025 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=339, PETRI_PLACES=81, PETRI_TRANSITIONS=55} [2021-06-13 11:30:22,026 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2021-06-13 11:30:22,026 INFO L482 AbstractCegarLoop]: Abstraction has has 81 places, 55 transitions, 339 flow [2021-06-13 11:30:22,026 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) [2021-06-13 11:30:22,026 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:22,026 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:22,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-13 11:30:22,026 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:22,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:22,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2087195573, now seen corresponding path program 9 times [2021-06-13 11:30:22,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:22,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345353646] [2021-06-13 11:30:22,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:22,041 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:22,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 11:30:22,046 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,046 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,052 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,053 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,060 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,060 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,067 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,068 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,087 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,087 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,096 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-06-13 11:30:22,097 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:22,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:22,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345353646] [2021-06-13 11:30:22,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345353646] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:22,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:22,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-13 11:30:22,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227806054] [2021-06-13 11:30:22,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-13 11:30:22,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:22,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-13 11:30:22,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-13 11:30:22,110 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-13 11:30:22,111 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 55 transitions, 339 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) [2021-06-13 11:30:22,111 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:22,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-13 11:30:22,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:22,239 INFO L129 PetriNetUnfolder]: 13/177 cut-off events. [2021-06-13 11:30:22,239 INFO L130 PetriNetUnfolder]: For 305/305 co-relation queries the response was YES. [2021-06-13 11:30:22,239 INFO L84 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 177 events. 13/177 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 881 event pairs, 2 based on Foata normal form. 1/178 useless extension candidates. Maximal degree in co-relation 409. Up to 20 conditions per place. [2021-06-13 11:30:22,240 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 17 selfloop transitions, 19 changer transitions 0/59 dead transitions. [2021-06-13 11:30:22,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 59 transitions, 435 flow [2021-06-13 11:30:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-13 11:30:22,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-13 11:30:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 271 transitions. [2021-06-13 11:30:22,242 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7742857142857142 [2021-06-13 11:30:22,242 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 271 transitions. [2021-06-13 11:30:22,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 271 transitions. [2021-06-13 11:30:22,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:22,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 271 transitions. [2021-06-13 11:30:22,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 27.1) internal successors, (271), 10 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:22,244 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) [2021-06-13 11:30:22,244 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) [2021-06-13 11:30:22,244 INFO L185 Difference]: Start difference. First operand has 81 places, 55 transitions, 339 flow. Second operand 10 states and 271 transitions. [2021-06-13 11:30:22,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 59 transitions, 435 flow [2021-06-13 11:30:22,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 59 transitions, 397 flow, removed 3 selfloop flow, removed 10 redundant places. [2021-06-13 11:30:22,247 INFO L241 Difference]: Finished difference. Result has 77 places, 56 transitions, 350 flow [2021-06-13 11:30:22,247 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=350, PETRI_PLACES=77, PETRI_TRANSITIONS=56} [2021-06-13 11:30:22,247 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2021-06-13 11:30:22,248 INFO L482 AbstractCegarLoop]: Abstraction has has 77 places, 56 transitions, 350 flow [2021-06-13 11:30:22,248 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) [2021-06-13 11:30:22,248 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:22,248 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:22,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-13 11:30:22,248 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:22,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:22,249 INFO L82 PathProgramCache]: Analyzing trace with hash -2076730765, now seen corresponding path program 10 times [2021-06-13 11:30:22,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:22,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998850565] [2021-06-13 11:30:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:22,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:22,264 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 11:30:22,267 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,267 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,273 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,273 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,287 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,287 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,294 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,295 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,304 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,315 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,316 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,326 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:22,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:22,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998850565] [2021-06-13 11:30:22,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998850565] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:22,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:22,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-13 11:30:22,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70525492] [2021-06-13 11:30:22,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-13 11:30:22,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:22,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-13 11:30:22,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-13 11:30:22,329 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-13 11:30:22,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 56 transitions, 350 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) [2021-06-13 11:30:22,329 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:22,329 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-13 11:30:22,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:22,445 INFO L129 PetriNetUnfolder]: 11/147 cut-off events. [2021-06-13 11:30:22,446 INFO L130 PetriNetUnfolder]: For 272/278 co-relation queries the response was YES. [2021-06-13 11:30:22,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 147 events. 11/147 cut-off events. For 272/278 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 650 event pairs, 2 based on Foata normal form. 2/149 useless extension candidates. Maximal degree in co-relation 399. Up to 20 conditions per place. [2021-06-13 11:30:22,447 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 15 selfloop transitions, 11 changer transitions 6/55 dead transitions. [2021-06-13 11:30:22,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 55 transitions, 398 flow [2021-06-13 11:30:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-13 11:30:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-13 11:30:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 267 transitions. [2021-06-13 11:30:22,448 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7628571428571429 [2021-06-13 11:30:22,448 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 267 transitions. [2021-06-13 11:30:22,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 267 transitions. [2021-06-13 11:30:22,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:22,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 267 transitions. [2021-06-13 11:30:22,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 26.7) internal successors, (267), 10 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:22,450 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) [2021-06-13 11:30:22,450 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) [2021-06-13 11:30:22,450 INFO L185 Difference]: Start difference. First operand has 77 places, 56 transitions, 350 flow. Second operand 10 states and 267 transitions. [2021-06-13 11:30:22,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 55 transitions, 398 flow [2021-06-13 11:30:22,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 55 transitions, 366 flow, removed 1 selfloop flow, removed 8 redundant places. [2021-06-13 11:30:22,453 INFO L241 Difference]: Finished difference. Result has 78 places, 46 transitions, 256 flow [2021-06-13 11:30:22,454 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=256, PETRI_PLACES=78, PETRI_TRANSITIONS=46} [2021-06-13 11:30:22,454 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 40 predicate places. [2021-06-13 11:30:22,454 INFO L482 AbstractCegarLoop]: Abstraction has has 78 places, 46 transitions, 256 flow [2021-06-13 11:30:22,454 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) [2021-06-13 11:30:22,454 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:22,454 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:22,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-13 11:30:22,454 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:22,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:22,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1036845817, now seen corresponding path program 11 times [2021-06-13 11:30:22,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:22,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328602060] [2021-06-13 11:30:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:22,483 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,483 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:22,484 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,484 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 11:30:22,499 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,499 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,505 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,505 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,511 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,511 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,518 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,519 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,528 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,528 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,537 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-06-13 11:30:22,538 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,548 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,548 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:22,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:22,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328602060] [2021-06-13 11:30:22,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328602060] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:22,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:22,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-13 11:30:22,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883063316] [2021-06-13 11:30:22,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-13 11:30:22,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:22,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-13 11:30:22,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-13 11:30:22,550 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-13 11:30:22,551 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 46 transitions, 256 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) [2021-06-13 11:30:22,551 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:22,551 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-13 11:30:22,551 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:22,665 INFO L129 PetriNetUnfolder]: 7/126 cut-off events. [2021-06-13 11:30:22,665 INFO L130 PetriNetUnfolder]: For 209/211 co-relation queries the response was YES. [2021-06-13 11:30:22,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 126 events. 7/126 cut-off events. For 209/211 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 506 event pairs, 2 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 328. Up to 18 conditions per place. [2021-06-13 11:30:22,666 INFO L132 encePairwiseOnDemand]: 26/35 looper letters, 11 selfloop transitions, 9 changer transitions 4/47 dead transitions. [2021-06-13 11:30:22,666 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 47 transitions, 310 flow [2021-06-13 11:30:22,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-13 11:30:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-13 11:30:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2021-06-13 11:30:22,667 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7428571428571429 [2021-06-13 11:30:22,667 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 234 transitions. [2021-06-13 11:30:22,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 234 transitions. [2021-06-13 11:30:22,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:22,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 234 transitions. [2021-06-13 11:30:22,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 26.0) internal successors, (234), 9 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:22,669 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) [2021-06-13 11:30:22,669 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) [2021-06-13 11:30:22,669 INFO L185 Difference]: Start difference. First operand has 78 places, 46 transitions, 256 flow. Second operand 9 states and 234 transitions. [2021-06-13 11:30:22,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 47 transitions, 310 flow [2021-06-13 11:30:22,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 47 transitions, 246 flow, removed 7 selfloop flow, removed 12 redundant places. [2021-06-13 11:30:22,671 INFO L241 Difference]: Finished difference. Result has 66 places, 41 transitions, 184 flow [2021-06-13 11:30:22,671 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=184, PETRI_PLACES=66, PETRI_TRANSITIONS=41} [2021-06-13 11:30:22,671 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 28 predicate places. [2021-06-13 11:30:22,672 INFO L482 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 184 flow [2021-06-13 11:30:22,672 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) [2021-06-13 11:30:22,672 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:22,672 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:22,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-13 11:30:22,672 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:22,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:22,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1436527467, now seen corresponding path program 12 times [2021-06-13 11:30:22,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:22,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341915863] [2021-06-13 11:30:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:22,684 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,684 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:22,685 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 11:30:22,688 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,688 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,693 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,694 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,700 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,701 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,722 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,723 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,733 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,733 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 11:30:22,744 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,745 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:22,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:22,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341915863] [2021-06-13 11:30:22,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341915863] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:22,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:22,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-13 11:30:22,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645618042] [2021-06-13 11:30:22,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-13 11:30:22,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:22,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-13 11:30:22,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-13 11:30:22,747 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-13 11:30:22,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 184 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) [2021-06-13 11:30:22,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:22,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-13 11:30:22,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:22,853 INFO L129 PetriNetUnfolder]: 6/113 cut-off events. [2021-06-13 11:30:22,854 INFO L130 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2021-06-13 11:30:22,854 INFO L84 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 113 events. 6/113 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 435 event pairs, 1 based on Foata normal form. 1/114 useless extension candidates. Maximal degree in co-relation 260. Up to 27 conditions per place. [2021-06-13 11:30:22,854 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 10 selfloop transitions, 11 changer transitions 0/44 dead transitions. [2021-06-13 11:30:22,854 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 44 transitions, 245 flow [2021-06-13 11:30:22,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-13 11:30:22,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-13 11:30:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2021-06-13 11:30:22,856 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2021-06-13 11:30:22,856 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 235 transitions. [2021-06-13 11:30:22,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 235 transitions. [2021-06-13 11:30:22,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:22,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 235 transitions. [2021-06-13 11:30:22,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 26.11111111111111) internal successors, (235), 9 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:22,857 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) [2021-06-13 11:30:22,858 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) [2021-06-13 11:30:22,858 INFO L185 Difference]: Start difference. First operand has 66 places, 41 transitions, 184 flow. Second operand 9 states and 235 transitions. [2021-06-13 11:30:22,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 44 transitions, 245 flow [2021-06-13 11:30:22,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 44 transitions, 206 flow, removed 7 selfloop flow, removed 10 redundant places. [2021-06-13 11:30:22,860 INFO L241 Difference]: Finished difference. Result has 62 places, 43 transitions, 195 flow [2021-06-13 11:30:22,860 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=195, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2021-06-13 11:30:22,860 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2021-06-13 11:30:22,860 INFO L482 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 195 flow [2021-06-13 11:30:22,860 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) [2021-06-13 11:30:22,861 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:22,861 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:22,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-13 11:30:22,861 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:22,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:22,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1478377095, now seen corresponding path program 13 times [2021-06-13 11:30:22,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:22,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636563804] [2021-06-13 11:30:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:22,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:22,873 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 11:30:22,875 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,876 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 11:30:22,879 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,879 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 11:30:22,883 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,884 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:22,891 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 11:30:22,900 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,901 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:22,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:22,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636563804] [2021-06-13 11:30:22,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636563804] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:22,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:22,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-13 11:30:22,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799151879] [2021-06-13 11:30:22,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 11:30:22,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:22,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 11:30:22,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-13 11:30:22,903 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-13 11:30:22,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 195 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) [2021-06-13 11:30:22,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:22,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-13 11:30:22,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:22,971 INFO L129 PetriNetUnfolder]: 5/70 cut-off events. [2021-06-13 11:30:22,972 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2021-06-13 11:30:22,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 70 events. 5/70 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 1 based on Foata normal form. 3/73 useless extension candidates. Maximal degree in co-relation 178. Up to 8 conditions per place. [2021-06-13 11:30:22,972 INFO L132 encePairwiseOnDemand]: 27/35 looper letters, 5 selfloop transitions, 7 changer transitions 6/41 dead transitions. [2021-06-13 11:30:22,972 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 41 transitions, 217 flow [2021-06-13 11:30:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-13 11:30:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-13 11:30:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2021-06-13 11:30:22,973 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7464285714285714 [2021-06-13 11:30:22,974 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 209 transitions. [2021-06-13 11:30:22,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 209 transitions. [2021-06-13 11:30:22,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:22,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 209 transitions. [2021-06-13 11:30:22,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:22,975 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) [2021-06-13 11:30:22,976 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) [2021-06-13 11:30:22,976 INFO L185 Difference]: Start difference. First operand has 62 places, 43 transitions, 195 flow. Second operand 8 states and 209 transitions. [2021-06-13 11:30:22,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 41 transitions, 217 flow [2021-06-13 11:30:22,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 41 transitions, 199 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-06-13 11:30:22,978 INFO L241 Difference]: Finished difference. Result has 61 places, 35 transitions, 151 flow [2021-06-13 11:30:22,978 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=151, PETRI_PLACES=61, PETRI_TRANSITIONS=35} [2021-06-13 11:30:22,978 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2021-06-13 11:30:22,978 INFO L482 AbstractCegarLoop]: Abstraction has has 61 places, 35 transitions, 151 flow [2021-06-13 11:30:22,980 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) [2021-06-13 11:30:22,980 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 11:30:22,980 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 11:30:22,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-13 11:30:22,980 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 11:30:22,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 11:30:22,981 INFO L82 PathProgramCache]: Analyzing trace with hash 966059713, now seen corresponding path program 14 times [2021-06-13 11:30:22,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 11:30:22,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233982074] [2021-06-13 11:30:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 11:30:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 11:30:22,992 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:22,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,993 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 11:30:22,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:22,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:23,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:23,002 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:23,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:23,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:23,016 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:23,017 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:23,025 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:23,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 11:30:23,036 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-06-13 11:30:23,037 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 11:30:23,048 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 11:30:23,048 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 11:30:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 11:30:23,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 11:30:23,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233982074] [2021-06-13 11:30:23,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233982074] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 11:30:23,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 11:30:23,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-13 11:30:23,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539111169] [2021-06-13 11:30:23,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-13 11:30:23,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 11:30:23,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-13 11:30:23,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-13 11:30:23,050 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-13 11:30:23,050 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 35 transitions, 151 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) [2021-06-13 11:30:23,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 11:30:23,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-13 11:30:23,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 11:30:23,130 INFO L129 PetriNetUnfolder]: 0/21 cut-off events. [2021-06-13 11:30:23,130 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-06-13 11:30:23,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 21 events. 0/21 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 1/22 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-13 11:30:23,131 INFO L132 encePairwiseOnDemand]: 27/35 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2021-06-13 11:30:23,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 21 transitions, 106 flow [2021-06-13 11:30:23,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-13 11:30:23,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-13 11:30:23,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2021-06-13 11:30:23,132 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2021-06-13 11:30:23,132 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 225 transitions. [2021-06-13 11:30:23,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 225 transitions. [2021-06-13 11:30:23,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 11:30:23,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 225 transitions. [2021-06-13 11:30:23,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 25.0) internal successors, (225), 9 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 11:30:23,133 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) [2021-06-13 11:30:23,134 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) [2021-06-13 11:30:23,134 INFO L185 Difference]: Start difference. First operand has 61 places, 35 transitions, 151 flow. Second operand 9 states and 225 transitions. [2021-06-13 11:30:23,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 21 transitions, 106 flow [2021-06-13 11:30:23,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 21 transitions, 76 flow, removed 0 selfloop flow, removed 15 redundant places. [2021-06-13 11:30:23,134 INFO L241 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2021-06-13 11:30:23,134 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2021-06-13 11:30:23,135 INFO L335 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2021-06-13 11:30:23,135 INFO L482 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2021-06-13 11:30:23,135 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) [2021-06-13 11:30:23,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-13 11:30:23,137 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-13 11:30:23,139 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.06 11:30:23 BasicIcfg [2021-06-13 11:30:23,139 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-13 11:30:23,140 INFO L168 Benchmark]: Toolchain (without parser) took 3622.09 ms. Allocated memory was 205.5 MB in the beginning and 292.6 MB in the end (delta: 87.0 MB). Free memory was 186.0 MB in the beginning and 143.0 MB in the end (delta: 43.0 MB). Peak memory consumption was 130.0 MB. Max. memory is 8.0 GB. [2021-06-13 11:30:23,140 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 205.5 MB. Free memory is still 187.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 11:30:23,140 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.46 ms. Allocated memory is still 205.5 MB. Free memory was 185.9 MB in the beginning and 184.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 11:30:23,140 INFO L168 Benchmark]: Boogie Preprocessor took 16.79 ms. Allocated memory is still 205.5 MB. Free memory was 184.5 MB in the beginning and 183.5 MB in the end (delta: 938.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 11:30:23,141 INFO L168 Benchmark]: RCFGBuilder took 229.91 ms. Allocated memory is still 205.5 MB. Free memory was 183.5 MB in the beginning and 172.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-06-13 11:30:23,141 INFO L168 Benchmark]: TraceAbstraction took 3343.63 ms. Allocated memory was 205.5 MB in the beginning and 292.6 MB in the end (delta: 87.0 MB). Free memory was 171.5 MB in the beginning and 143.0 MB in the end (delta: 28.5 MB). Peak memory consumption was 115.3 MB. Max. memory is 8.0 GB. [2021-06-13 11:30:23,142 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 205.5 MB. Free memory is still 187.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.46 ms. Allocated memory is still 205.5 MB. Free memory was 185.9 MB in the beginning and 184.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.79 ms. Allocated memory is still 205.5 MB. Free memory was 184.5 MB in the beginning and 183.5 MB in the end (delta: 938.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 229.91 ms. Allocated memory is still 205.5 MB. Free memory was 183.5 MB in the beginning and 172.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3343.63 ms. Allocated memory was 205.5 MB in the beginning and 292.6 MB in the end (delta: 87.0 MB). Free memory was 171.5 MB in the beginning and 143.0 MB in the end (delta: 28.5 MB). Peak memory consumption was 115.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 60]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 60 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 14.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3265.4ms, OverallIterations: 14, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1816.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 89.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 85 SDtfs, 304 SDslu, 102 SDs, 0 SdLazy, 565 SolverSat, 151 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 389.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 162 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1300.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=406occurred in iteration=7, InterpolantAutomatonStates: 116, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 30.3ms SsaConstructionTime, 106.0ms SatisfiabilityAnalysisTime, 996.2ms InterpolantComputationTime, 434 NumberOfCodeBlocks, 434 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 420 ConstructedInterpolants, 0 QuantifiedInterpolants, 1610 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...