/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 18:51:12,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 18:51:12,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 18:51:12,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 18:51:12,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 18:51:12,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 18:51:12,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 18:51:12,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 18:51:12,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 18:51:12,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 18:51:12,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 18:51:12,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 18:51:12,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 18:51:12,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 18:51:12,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 18:51:12,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 18:51:12,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 18:51:12,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 18:51:12,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 18:51:12,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 18:51:12,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 18:51:12,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 18:51:12,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 18:51:12,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 18:51:12,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 18:51:12,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-10 18:51:12,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-10 18:51:12,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-10 18:51:12,080 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-06-10 18:51:12,092 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 18:51:12,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 18:51:12,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 18:51:12,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 18:51:12,093 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 18:51:12,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 18:51:12,094 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 18:51:12,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 18:51:12,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 18:51:12,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 18:51:12,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 18:51:12,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 18:51:12,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 18:51:12,094 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 18:51:12,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 18:51:12,094 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 18:51:12,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 18:51:12,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 18:51:12,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 18:51:12,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 18:51:12,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 18:51:12,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 18:51:12,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 18:51:12,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 18:51:12,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 18:51:12,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 18:51:12,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 18:51:12,095 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 18:51:12,096 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 18:51:12,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 18:51:12,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 18:51:12,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 18:51:12,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 18:51:12,303 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 18:51:12,304 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 18:51:12,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl [2021-06-10 18:51:12,304 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl' [2021-06-10 18:51:12,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 18:51:12,336 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 18:51:12,337 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 18:51:12,337 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 18:51:12,337 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 18:51:12,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:51:12" (1/1) ... [2021-06-10 18:51:12,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:51:12" (1/1) ... [2021-06-10 18:51:12,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 18:51:12,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 18:51:12,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 18:51:12,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 18:51:12,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:51:12" (1/1) ... [2021-06-10 18:51:12,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:51:12" (1/1) ... [2021-06-10 18:51:12,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:51:12" (1/1) ... [2021-06-10 18:51:12,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:51:12" (1/1) ... [2021-06-10 18:51:12,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:51:12" (1/1) ... [2021-06-10 18:51:12,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:51:12" (1/1) ... [2021-06-10 18:51:12,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:51:12" (1/1) ... [2021-06-10 18:51:12,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 18:51:12,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 18:51:12,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 18:51:12,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 18:51:12,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:51:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 18:51:12,412 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-10 18:51:12,413 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-10 18:51:12,414 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-10 18:51:12,414 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-10 18:51:12,414 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-10 18:51:12,414 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-10 18:51:12,414 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 18:51:12,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 18:51:12,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 18:51:12,415 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-10 18:51:12,562 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 18:51:12,562 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 18:51:12,564 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 06:51:12 BoogieIcfgContainer [2021-06-10 18:51:12,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 18:51:12,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 18:51:12,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 18:51:12,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 18:51:12,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 06:51:12" (1/2) ... [2021-06-10 18:51:12,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@229ed499 and model type easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 06:51:12, skipping insertion in model container [2021-06-10 18:51:12,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 06:51:12" (2/2) ... [2021-06-10 18:51:12,574 INFO L111 eAbstractionObserver]: Analyzing ICFG easy6.wvr.bpl [2021-06-10 18:51:12,578 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 18:51:12,580 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 18:51:12,581 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 18:51:12,647 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-10 18:51:12,658 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-10 18:51:12,672 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 18:51:12,672 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 18:51:12,672 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 18:51:12,672 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 18:51:12,672 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 18:51:12,672 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 18:51:12,672 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 18:51:12,672 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 18:51:12,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 42 places, 35 transitions, 86 flow [2021-06-10 18:51:12,702 INFO L129 PetriNetUnfolder]: 0/33 cut-off events. [2021-06-10 18:51:12,702 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-10 18:51:12,703 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. [2021-06-10 18:51:12,703 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 35 transitions, 86 flow [2021-06-10 18:51:12,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 31 transitions, 74 flow [2021-06-10 18:51:12,715 INFO L129 PetriNetUnfolder]: 0/30 cut-off events. [2021-06-10 18:51:12,715 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-10 18:51:12,715 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:51:12,715 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:51:12,716 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:51:12,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:51:12,719 INFO L82 PathProgramCache]: Analyzing trace with hash 227240445, now seen corresponding path program 1 times [2021-06-10 18:51:12,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:51:12,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194577533] [2021-06-10 18:51:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:51:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:51:12,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:12,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:12,866 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:12,868 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:12,883 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:12,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:12,894 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:12,895 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:12,908 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-06-10 18:51:12,909 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:12,919 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:12,920 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 18:51:12,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194577533] [2021-06-10 18:51:12,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:51:12,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-10 18:51:12,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946281178] [2021-06-10 18:51:12,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-10 18:51:12,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:51:12,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-10 18:51:12,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-10 18:51:12,950 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 35 [2021-06-10 18:51:12,953 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) [2021-06-10 18:51:12,953 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:51:12,953 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 35 [2021-06-10 18:51:12,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:51:13,081 INFO L129 PetriNetUnfolder]: 1/63 cut-off events. [2021-06-10 18:51:13,081 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-06-10 18:51:13,083 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 63 events. 1/63 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 162 event pairs, 0 based on Foata normal form. 1/64 useless extension candidates. Maximal degree in co-relation 64. Up to 5 conditions per place. [2021-06-10 18:51:13,085 INFO L132 encePairwiseOnDemand]: 29/35 looper letters, 7 selfloop transitions, 7 changer transitions 2/41 dead transitions. [2021-06-10 18:51:13,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 126 flow [2021-06-10 18:51:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 18:51:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 18:51:13,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2021-06-10 18:51:13,096 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8607142857142858 [2021-06-10 18:51:13,096 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 241 transitions. [2021-06-10 18:51:13,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 241 transitions. [2021-06-10 18:51:13,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:51:13,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 241 transitions. [2021-06-10 18:51:13,104 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) [2021-06-10 18:51:13,107 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) [2021-06-10 18:51:13,108 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) [2021-06-10 18:51:13,109 INFO L185 Difference]: Start difference. First operand has 38 places, 31 transitions, 74 flow. Second operand 8 states and 241 transitions. [2021-06-10 18:51:13,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 126 flow [2021-06-10 18:51:13,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 118 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-10 18:51:13,114 INFO L241 Difference]: Finished difference. Result has 44 places, 36 transitions, 104 flow [2021-06-10 18:51:13,115 INFO L326 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} [2021-06-10 18:51:13,116 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2021-06-10 18:51:13,116 INFO L480 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 104 flow [2021-06-10 18:51:13,116 INFO L481 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) [2021-06-10 18:51:13,116 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:51:13,117 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:51:13,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 18:51:13,117 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:51:13,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:51:13,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1955713021, now seen corresponding path program 2 times [2021-06-10 18:51:13,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:51:13,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939490405] [2021-06-10 18:51:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:51:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:51:13,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:13,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:51:13,172 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,172 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:51:13,176 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,176 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:51:13,182 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,183 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,193 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,195 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 18:51:13,204 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,204 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 18:51:13,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939490405] [2021-06-10 18:51:13,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:51:13,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 18:51:13,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833619969] [2021-06-10 18:51:13,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-10 18:51:13,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:51:13,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-10 18:51:13,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-10 18:51:13,217 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-10 18:51:13,217 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) [2021-06-10 18:51:13,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:51:13,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-10 18:51:13,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:51:13,326 INFO L129 PetriNetUnfolder]: 34/227 cut-off events. [2021-06-10 18:51:13,327 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-06-10 18:51:13,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 227 events. 34/227 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1212 event pairs, 4 based on Foata normal form. 2/226 useless extension candidates. Maximal degree in co-relation 367. Up to 26 conditions per place. [2021-06-10 18:51:13,329 INFO L132 encePairwiseOnDemand]: 26/35 looper letters, 18 selfloop transitions, 17 changer transitions 2/63 dead transitions. [2021-06-10 18:51:13,329 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 63 transitions, 232 flow [2021-06-10 18:51:13,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-10 18:51:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-10 18:51:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2021-06-10 18:51:13,331 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8063492063492064 [2021-06-10 18:51:13,331 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 254 transitions. [2021-06-10 18:51:13,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 254 transitions. [2021-06-10 18:51:13,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:51:13,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 254 transitions. [2021-06-10 18:51:13,332 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) [2021-06-10 18:51:13,333 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) [2021-06-10 18:51:13,333 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) [2021-06-10 18:51:13,333 INFO L185 Difference]: Start difference. First operand has 44 places, 36 transitions, 104 flow. Second operand 9 states and 254 transitions. [2021-06-10 18:51:13,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 63 transitions, 232 flow [2021-06-10 18:51:13,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 63 transitions, 230 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-06-10 18:51:13,336 INFO L241 Difference]: Finished difference. Result has 53 places, 53 transitions, 205 flow [2021-06-10 18:51:13,336 INFO L326 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=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=205, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2021-06-10 18:51:13,337 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2021-06-10 18:51:13,337 INFO L480 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 205 flow [2021-06-10 18:51:13,337 INFO L481 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) [2021-06-10 18:51:13,337 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:51:13,337 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:51:13,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 18:51:13,337 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:51:13,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:51:13,338 INFO L82 PathProgramCache]: Analyzing trace with hash -543355899, now seen corresponding path program 3 times [2021-06-10 18:51:13,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:51:13,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671632930] [2021-06-10 18:51:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:51:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:51:13,347 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:13,348 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:13,350 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,350 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 18:51:13,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671632930] [2021-06-10 18:51:13,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:51:13,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 18:51:13,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213771819] [2021-06-10 18:51:13,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 18:51:13,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:51:13,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 18:51:13,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 18:51:13,352 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2021-06-10 18:51:13,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 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) [2021-06-10 18:51:13,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:51:13,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2021-06-10 18:51:13,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:51:13,369 INFO L129 PetriNetUnfolder]: 14/171 cut-off events. [2021-06-10 18:51:13,369 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2021-06-10 18:51:13,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 171 events. 14/171 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 852 event pairs, 1 based on Foata normal form. 4/169 useless extension candidates. Maximal degree in co-relation 255. Up to 20 conditions per place. [2021-06-10 18:51:13,370 INFO L132 encePairwiseOnDemand]: 32/35 looper letters, 2 selfloop transitions, 2 changer transitions 1/52 dead transitions. [2021-06-10 18:51:13,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 208 flow [2021-06-10 18:51:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 18:51:13,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 18:51:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2021-06-10 18:51:13,371 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-06-10 18:51:13,371 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2021-06-10 18:51:13,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2021-06-10 18:51:13,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:51:13,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2021-06-10 18:51:13,372 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) [2021-06-10 18:51:13,372 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) [2021-06-10 18:51:13,372 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) [2021-06-10 18:51:13,373 INFO L185 Difference]: Start difference. First operand has 53 places, 53 transitions, 205 flow. Second operand 3 states and 95 transitions. [2021-06-10 18:51:13,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 208 flow [2021-06-10 18:51:13,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-06-10 18:51:13,375 INFO L241 Difference]: Finished difference. Result has 56 places, 51 transitions, 202 flow [2021-06-10 18:51:13,375 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=53, 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=202, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2021-06-10 18:51:13,375 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2021-06-10 18:51:13,375 INFO L480 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 202 flow [2021-06-10 18:51:13,375 INFO L481 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) [2021-06-10 18:51:13,375 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:51:13,375 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:51:13,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 18:51:13,376 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:51:13,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:51:13,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1439395879, now seen corresponding path program 4 times [2021-06-10 18:51:13,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:51:13,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245352810] [2021-06-10 18:51:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:51:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:51:13,401 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,402 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,406 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,407 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,412 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,419 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,427 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-06-10 18:51:13,428 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,435 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,435 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 18:51:13,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245352810] [2021-06-10 18:51:13,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:51:13,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-10 18:51:13,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060664340] [2021-06-10 18:51:13,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-10 18:51:13,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:51:13,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-10 18:51:13,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-10 18:51:13,437 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 35 [2021-06-10 18:51:13,438 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 202 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) [2021-06-10 18:51:13,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:51:13,438 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 35 [2021-06-10 18:51:13,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:51:13,508 INFO L129 PetriNetUnfolder]: 15/170 cut-off events. [2021-06-10 18:51:13,508 INFO L130 PetriNetUnfolder]: For 30/32 co-relation queries the response was YES. [2021-06-10 18:51:13,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 170 events. 15/170 cut-off events. For 30/32 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 834 event pairs, 1 based on Foata normal form. 3/165 useless extension candidates. Maximal degree in co-relation 297. Up to 19 conditions per place. [2021-06-10 18:51:13,509 INFO L132 encePairwiseOnDemand]: 29/35 looper letters, 4 selfloop transitions, 6 changer transitions 9/54 dead transitions. [2021-06-10 18:51:13,509 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 54 transitions, 242 flow [2021-06-10 18:51:13,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-10 18:51:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-10 18:51:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2021-06-10 18:51:13,510 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.85 [2021-06-10 18:51:13,510 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 238 transitions. [2021-06-10 18:51:13,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 238 transitions. [2021-06-10 18:51:13,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:51:13,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 238 transitions. [2021-06-10 18:51:13,511 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) [2021-06-10 18:51:13,512 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) [2021-06-10 18:51:13,512 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) [2021-06-10 18:51:13,512 INFO L185 Difference]: Start difference. First operand has 56 places, 51 transitions, 202 flow. Second operand 8 states and 238 transitions. [2021-06-10 18:51:13,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 54 transitions, 242 flow [2021-06-10 18:51:13,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 54 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 18:51:13,514 INFO L241 Difference]: Finished difference. Result has 62 places, 43 transitions, 176 flow [2021-06-10 18:51:13,514 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=176, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2021-06-10 18:51:13,515 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2021-06-10 18:51:13,515 INFO L480 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 176 flow [2021-06-10 18:51:13,515 INFO L481 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) [2021-06-10 18:51:13,515 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:51:13,515 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:51:13,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-10 18:51:13,515 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:51:13,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:51:13,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1467795203, now seen corresponding path program 5 times [2021-06-10 18:51:13,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:51:13,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778290107] [2021-06-10 18:51:13,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:51:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:51:13,530 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,531 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:13,531 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,531 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:13,533 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,533 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 18:51:13,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778290107] [2021-06-10 18:51:13,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:51:13,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 18:51:13,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498711067] [2021-06-10 18:51:13,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 18:51:13,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:51:13,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 18:51:13,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 18:51:13,535 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2021-06-10 18:51:13,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 176 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) [2021-06-10 18:51:13,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:51:13,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2021-06-10 18:51:13,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:51:13,543 INFO L129 PetriNetUnfolder]: 6/103 cut-off events. [2021-06-10 18:51:13,544 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-06-10 18:51:13,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 103 events. 6/103 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 370 event pairs, 1 based on Foata normal form. 2/104 useless extension candidates. Maximal degree in co-relation 189. Up to 10 conditions per place. [2021-06-10 18:51:13,544 INFO L132 encePairwiseOnDemand]: 32/35 looper letters, 2 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2021-06-10 18:51:13,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 43 transitions, 184 flow [2021-06-10 18:51:13,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 18:51:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 18:51:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2021-06-10 18:51:13,545 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-06-10 18:51:13,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2021-06-10 18:51:13,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2021-06-10 18:51:13,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:51:13,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2021-06-10 18:51:13,546 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) [2021-06-10 18:51:13,546 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) [2021-06-10 18:51:13,546 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) [2021-06-10 18:51:13,546 INFO L185 Difference]: Start difference. First operand has 62 places, 43 transitions, 176 flow. Second operand 3 states and 95 transitions. [2021-06-10 18:51:13,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 43 transitions, 184 flow [2021-06-10 18:51:13,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 159 flow, removed 3 selfloop flow, removed 11 redundant places. [2021-06-10 18:51:13,548 INFO L241 Difference]: Finished difference. Result has 50 places, 43 transitions, 159 flow [2021-06-10 18:51:13,548 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2021-06-10 18:51:13,548 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2021-06-10 18:51:13,548 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 159 flow [2021-06-10 18:51:13,548 INFO L481 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) [2021-06-10 18:51:13,548 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:51:13,549 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:51:13,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-10 18:51:13,549 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:51:13,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:51:13,549 INFO L82 PathProgramCache]: Analyzing trace with hash -430789687, now seen corresponding path program 6 times [2021-06-10 18:51:13,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:51:13,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918672454] [2021-06-10 18:51:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:51:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:51:13,562 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,563 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:13,563 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,563 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:51:13,565 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:51:13,568 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,568 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:51:13,572 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,579 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 18:51:13,585 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,586 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 18:51:13,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918672454] [2021-06-10 18:51:13,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:51:13,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-10 18:51:13,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824377455] [2021-06-10 18:51:13,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-10 18:51:13,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:51:13,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-10 18:51:13,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-10 18:51:13,588 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-10 18:51:13,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 159 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) [2021-06-10 18:51:13,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:51:13,588 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-10 18:51:13,588 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:51:13,663 INFO L129 PetriNetUnfolder]: 8/84 cut-off events. [2021-06-10 18:51:13,663 INFO L130 PetriNetUnfolder]: For 31/35 co-relation queries the response was YES. [2021-06-10 18:51:13,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 84 events. 8/84 cut-off events. For 31/35 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 231 event pairs, 1 based on Foata normal form. 3/86 useless extension candidates. Maximal degree in co-relation 113. Up to 10 conditions per place. [2021-06-10 18:51:13,665 INFO L132 encePairwiseOnDemand]: 27/35 looper letters, 7 selfloop transitions, 9 changer transitions 8/47 dead transitions. [2021-06-10 18:51:13,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 221 flow [2021-06-10 18:51:13,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-10 18:51:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-10 18:51:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2021-06-10 18:51:13,667 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7587301587301587 [2021-06-10 18:51:13,667 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 239 transitions. [2021-06-10 18:51:13,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 239 transitions. [2021-06-10 18:51:13,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:51:13,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 239 transitions. [2021-06-10 18:51:13,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 26.555555555555557) internal successors, (239), 9 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 18:51:13,669 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) [2021-06-10 18:51:13,669 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) [2021-06-10 18:51:13,669 INFO L185 Difference]: Start difference. First operand has 50 places, 43 transitions, 159 flow. Second operand 9 states and 239 transitions. [2021-06-10 18:51:13,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 221 flow [2021-06-10 18:51:13,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 47 transitions, 217 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 18:51:13,675 INFO L241 Difference]: Finished difference. Result has 56 places, 36 transitions, 143 flow [2021-06-10 18:51:13,675 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=143, PETRI_PLACES=56, PETRI_TRANSITIONS=36} [2021-06-10 18:51:13,675 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2021-06-10 18:51:13,675 INFO L480 AbstractCegarLoop]: Abstraction has has 56 places, 36 transitions, 143 flow [2021-06-10 18:51:13,675 INFO L481 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) [2021-06-10 18:51:13,675 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:51:13,675 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:51:13,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-10 18:51:13,676 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:51:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:51:13,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1399085887, now seen corresponding path program 7 times [2021-06-10 18:51:13,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:51:13,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522521986] [2021-06-10 18:51:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:51:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:51:13,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:13,693 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,693 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:51:13,695 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,696 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,703 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,704 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,709 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,715 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,722 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,723 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,731 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-06-10 18:51:13,731 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,740 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,740 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 18:51:13,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522521986] [2021-06-10 18:51:13,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:51:13,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-10 18:51:13,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284255990] [2021-06-10 18:51:13,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 18:51:13,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:51:13,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 18:51:13,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-10 18:51:13,742 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-10 18:51:13,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 36 transitions, 143 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) [2021-06-10 18:51:13,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:51:13,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-10 18:51:13,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:51:13,843 INFO L129 PetriNetUnfolder]: 11/116 cut-off events. [2021-06-10 18:51:13,844 INFO L130 PetriNetUnfolder]: For 77/79 co-relation queries the response was YES. [2021-06-10 18:51:13,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 116 events. 11/116 cut-off events. For 77/79 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 420 event pairs, 1 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 155. Up to 16 conditions per place. [2021-06-10 18:51:13,846 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 14 selfloop transitions, 15 changer transitions 0/52 dead transitions. [2021-06-10 18:51:13,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 52 transitions, 292 flow [2021-06-10 18:51:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 18:51:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 18:51:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 266 transitions. [2021-06-10 18:51:13,847 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.76 [2021-06-10 18:51:13,847 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 266 transitions. [2021-06-10 18:51:13,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 266 transitions. [2021-06-10 18:51:13,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:51:13,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 266 transitions. [2021-06-10 18:51:13,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 18:51:13,849 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) [2021-06-10 18:51:13,849 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) [2021-06-10 18:51:13,849 INFO L185 Difference]: Start difference. First operand has 56 places, 36 transitions, 143 flow. Second operand 10 states and 266 transitions. [2021-06-10 18:51:13,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 52 transitions, 292 flow [2021-06-10 18:51:13,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 244 flow, removed 2 selfloop flow, removed 9 redundant places. [2021-06-10 18:51:13,853 INFO L241 Difference]: Finished difference. Result has 57 places, 46 transitions, 221 flow [2021-06-10 18:51:13,853 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=221, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2021-06-10 18:51:13,853 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2021-06-10 18:51:13,853 INFO L480 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 221 flow [2021-06-10 18:51:13,853 INFO L481 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) [2021-06-10 18:51:13,853 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:51:13,853 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:51:13,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-10 18:51:13,854 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:51:13,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:51:13,854 INFO L82 PathProgramCache]: Analyzing trace with hash -95570357, now seen corresponding path program 8 times [2021-06-10 18:51:13,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:51:13,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909068590] [2021-06-10 18:51:13,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:51:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:51:13,888 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,889 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:13,889 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,889 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:51:13,892 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,901 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,909 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,920 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,920 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,927 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,936 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:13,946 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:13,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 18:51:13,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909068590] [2021-06-10 18:51:13,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:51:13,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-10 18:51:13,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063622432] [2021-06-10 18:51:13,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 18:51:13,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:51:13,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 18:51:13,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-10 18:51:13,956 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-10 18:51:13,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 221 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) [2021-06-10 18:51:13,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:51:13,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-10 18:51:13,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:51:14,080 INFO L129 PetriNetUnfolder]: 14/133 cut-off events. [2021-06-10 18:51:14,080 INFO L130 PetriNetUnfolder]: For 133/137 co-relation queries the response was YES. [2021-06-10 18:51:14,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 133 events. 14/133 cut-off events. For 133/137 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 527 event pairs, 1 based on Foata normal form. 1/134 useless extension candidates. Maximal degree in co-relation 167. Up to 22 conditions per place. [2021-06-10 18:51:14,081 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 17 selfloop transitions, 16 changer transitions 1/57 dead transitions. [2021-06-10 18:51:14,081 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 358 flow [2021-06-10 18:51:14,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 18:51:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 18:51:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 266 transitions. [2021-06-10 18:51:14,082 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.76 [2021-06-10 18:51:14,082 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 266 transitions. [2021-06-10 18:51:14,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 266 transitions. [2021-06-10 18:51:14,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:51:14,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 266 transitions. [2021-06-10 18:51:14,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 18:51:14,083 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) [2021-06-10 18:51:14,083 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) [2021-06-10 18:51:14,083 INFO L185 Difference]: Start difference. First operand has 57 places, 46 transitions, 221 flow. Second operand 10 states and 266 transitions. [2021-06-10 18:51:14,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 358 flow [2021-06-10 18:51:14,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 335 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-06-10 18:51:14,085 INFO L241 Difference]: Finished difference. Result has 64 places, 52 transitions, 289 flow [2021-06-10 18:51:14,086 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=289, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2021-06-10 18:51:14,086 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2021-06-10 18:51:14,086 INFO L480 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 289 flow [2021-06-10 18:51:14,087 INFO L481 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) [2021-06-10 18:51:14,087 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:51:14,087 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:51:14,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-10 18:51:14,087 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:51:14,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:51:14,088 INFO L82 PathProgramCache]: Analyzing trace with hash 626038183, now seen corresponding path program 9 times [2021-06-10 18:51:14,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:51:14,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054074084] [2021-06-10 18:51:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:51:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:51:14,108 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,109 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:14,110 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,128 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:51:14,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,139 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,145 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,150 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,160 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,174 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-06-10 18:51:14,174 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,182 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,183 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 18:51:14,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054074084] [2021-06-10 18:51:14,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:51:14,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-10 18:51:14,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299677569] [2021-06-10 18:51:14,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 18:51:14,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:51:14,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 18:51:14,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-10 18:51:14,184 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-10 18:51:14,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 289 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) [2021-06-10 18:51:14,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:51:14,184 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-10 18:51:14,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:51:14,277 INFO L129 PetriNetUnfolder]: 10/123 cut-off events. [2021-06-10 18:51:14,277 INFO L130 PetriNetUnfolder]: For 162/167 co-relation queries the response was YES. [2021-06-10 18:51:14,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 123 events. 10/123 cut-off events. For 162/167 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 487 event pairs, 1 based on Foata normal form. 3/126 useless extension candidates. Maximal degree in co-relation 205. Up to 20 conditions per place. [2021-06-10 18:51:14,277 INFO L132 encePairwiseOnDemand]: 26/35 looper letters, 16 selfloop transitions, 11 changer transitions 5/55 dead transitions. [2021-06-10 18:51:14,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 55 transitions, 369 flow [2021-06-10 18:51:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 18:51:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 18:51:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2021-06-10 18:51:14,278 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7542857142857143 [2021-06-10 18:51:14,278 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 264 transitions. [2021-06-10 18:51:14,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 264 transitions. [2021-06-10 18:51:14,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:51:14,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 264 transitions. [2021-06-10 18:51:14,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 26.4) internal successors, (264), 10 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 18:51:14,280 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) [2021-06-10 18:51:14,280 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) [2021-06-10 18:51:14,280 INFO L185 Difference]: Start difference. First operand has 64 places, 52 transitions, 289 flow. Second operand 10 states and 264 transitions. [2021-06-10 18:51:14,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 55 transitions, 369 flow [2021-06-10 18:51:14,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 55 transitions, 345 flow, removed 6 selfloop flow, removed 4 redundant places. [2021-06-10 18:51:14,282 INFO L241 Difference]: Finished difference. Result has 70 places, 47 transitions, 254 flow [2021-06-10 18:51:14,282 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=254, PETRI_PLACES=70, PETRI_TRANSITIONS=47} [2021-06-10 18:51:14,282 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2021-06-10 18:51:14,282 INFO L480 AbstractCegarLoop]: Abstraction has has 70 places, 47 transitions, 254 flow [2021-06-10 18:51:14,282 INFO L481 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) [2021-06-10 18:51:14,282 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:51:14,282 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:51:14,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-10 18:51:14,282 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:51:14,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:51:14,283 INFO L82 PathProgramCache]: Analyzing trace with hash 61058879, now seen corresponding path program 10 times [2021-06-10 18:51:14,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:51:14,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346384417] [2021-06-10 18:51:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:51:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:51:14,293 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,293 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:14,293 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,293 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:51:14,295 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,296 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,300 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,300 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,305 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,315 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,316 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,323 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-06-10 18:51:14,323 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 18:51:14,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 18:51:14,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346384417] [2021-06-10 18:51:14,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:51:14,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-10 18:51:14,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125252026] [2021-06-10 18:51:14,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 18:51:14,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:51:14,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 18:51:14,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-10 18:51:14,333 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-10 18:51:14,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 47 transitions, 254 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) [2021-06-10 18:51:14,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:51:14,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-10 18:51:14,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:51:14,427 INFO L129 PetriNetUnfolder]: 9/112 cut-off events. [2021-06-10 18:51:14,427 INFO L130 PetriNetUnfolder]: For 153/159 co-relation queries the response was YES. [2021-06-10 18:51:14,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 112 events. 9/112 cut-off events. For 153/159 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 415 event pairs, 0 based on Foata normal form. 3/115 useless extension candidates. Maximal degree in co-relation 229. Up to 20 conditions per place. [2021-06-10 18:51:14,428 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 13 selfloop transitions, 14 changer transitions 1/51 dead transitions. [2021-06-10 18:51:14,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 51 transitions, 333 flow [2021-06-10 18:51:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 18:51:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 18:51:14,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2021-06-10 18:51:14,429 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7485714285714286 [2021-06-10 18:51:14,429 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 262 transitions. [2021-06-10 18:51:14,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 262 transitions. [2021-06-10 18:51:14,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:51:14,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 262 transitions. [2021-06-10 18:51:14,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 26.2) internal successors, (262), 10 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 18:51:14,430 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) [2021-06-10 18:51:14,430 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) [2021-06-10 18:51:14,430 INFO L185 Difference]: Start difference. First operand has 70 places, 47 transitions, 254 flow. Second operand 10 states and 262 transitions. [2021-06-10 18:51:14,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 51 transitions, 333 flow [2021-06-10 18:51:14,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 51 transitions, 307 flow, removed 2 selfloop flow, removed 9 redundant places. [2021-06-10 18:51:14,432 INFO L241 Difference]: Finished difference. Result has 67 places, 49 transitions, 275 flow [2021-06-10 18:51:14,432 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=275, PETRI_PLACES=67, PETRI_TRANSITIONS=49} [2021-06-10 18:51:14,432 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 29 predicate places. [2021-06-10 18:51:14,432 INFO L480 AbstractCegarLoop]: Abstraction has has 67 places, 49 transitions, 275 flow [2021-06-10 18:51:14,432 INFO L481 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) [2021-06-10 18:51:14,432 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:51:14,432 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:51:14,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-10 18:51:14,433 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:51:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:51:14,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1644065035, now seen corresponding path program 11 times [2021-06-10 18:51:14,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:51:14,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542613974] [2021-06-10 18:51:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:51:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:51:14,442 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,442 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:14,443 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,443 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:51:14,445 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,445 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,449 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,449 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,454 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,454 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,459 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,459 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,465 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,465 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,472 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,473 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 18:51:14,480 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,480 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 18:51:14,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542613974] [2021-06-10 18:51:14,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:51:14,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-10 18:51:14,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331383070] [2021-06-10 18:51:14,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 18:51:14,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:51:14,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 18:51:14,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-10 18:51:14,482 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-10 18:51:14,482 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 49 transitions, 275 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) [2021-06-10 18:51:14,482 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:51:14,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-10 18:51:14,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:51:14,557 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2021-06-10 18:51:14,557 INFO L130 PetriNetUnfolder]: For 117/121 co-relation queries the response was YES. [2021-06-10 18:51:14,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 84 events. 7/84 cut-off events. For 117/121 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 225 event pairs, 0 based on Foata normal form. 3/87 useless extension candidates. Maximal degree in co-relation 230. Up to 20 conditions per place. [2021-06-10 18:51:14,557 INFO L132 encePairwiseOnDemand]: 27/35 looper letters, 11 selfloop transitions, 6 changer transitions 7/47 dead transitions. [2021-06-10 18:51:14,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 47 transitions, 298 flow [2021-06-10 18:51:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 18:51:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 18:51:14,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2021-06-10 18:51:14,558 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7371428571428571 [2021-06-10 18:51:14,558 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 258 transitions. [2021-06-10 18:51:14,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 258 transitions. [2021-06-10 18:51:14,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:51:14,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 258 transitions. [2021-06-10 18:51:14,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 25.8) internal successors, (258), 10 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 18:51:14,559 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) [2021-06-10 18:51:14,560 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) [2021-06-10 18:51:14,560 INFO L185 Difference]: Start difference. First operand has 67 places, 49 transitions, 275 flow. Second operand 10 states and 258 transitions. [2021-06-10 18:51:14,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 47 transitions, 298 flow [2021-06-10 18:51:14,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 47 transitions, 272 flow, removed 4 selfloop flow, removed 7 redundant places. [2021-06-10 18:51:14,561 INFO L241 Difference]: Finished difference. Result has 69 places, 39 transitions, 180 flow [2021-06-10 18:51:14,561 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=180, PETRI_PLACES=69, PETRI_TRANSITIONS=39} [2021-06-10 18:51:14,561 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2021-06-10 18:51:14,561 INFO L480 AbstractCegarLoop]: Abstraction has has 69 places, 39 transitions, 180 flow [2021-06-10 18:51:14,561 INFO L481 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) [2021-06-10 18:51:14,561 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:51:14,562 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:51:14,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-10 18:51:14,562 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:51:14,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:51:14,562 INFO L82 PathProgramCache]: Analyzing trace with hash 914796105, now seen corresponding path program 12 times [2021-06-10 18:51:14,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:51:14,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408490107] [2021-06-10 18:51:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:51:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:51:14,571 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,571 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:14,571 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:51:14,573 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,574 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,578 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,578 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,582 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,583 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,588 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,588 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,594 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,595 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,601 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,602 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,612 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,613 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 18:51:14,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408490107] [2021-06-10 18:51:14,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:51:14,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-10 18:51:14,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982089173] [2021-06-10 18:51:14,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 18:51:14,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:51:14,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 18:51:14,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-10 18:51:14,614 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-10 18:51:14,614 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 39 transitions, 180 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) [2021-06-10 18:51:14,614 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:51:14,614 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-10 18:51:14,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:51:14,683 INFO L129 PetriNetUnfolder]: 3/62 cut-off events. [2021-06-10 18:51:14,683 INFO L130 PetriNetUnfolder]: For 65/67 co-relation queries the response was YES. [2021-06-10 18:51:14,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 62 events. 3/62 cut-off events. For 65/67 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 115 event pairs, 1 based on Foata normal form. 1/63 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2021-06-10 18:51:14,683 INFO L132 encePairwiseOnDemand]: 26/35 looper letters, 5 selfloop transitions, 7 changer transitions 4/39 dead transitions. [2021-06-10 18:51:14,683 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 39 transitions, 214 flow [2021-06-10 18:51:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-10 18:51:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-10 18:51:14,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2021-06-10 18:51:14,684 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2021-06-10 18:51:14,684 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 231 transitions. [2021-06-10 18:51:14,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 231 transitions. [2021-06-10 18:51:14,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:51:14,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 231 transitions. [2021-06-10 18:51:14,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 25.666666666666668) internal successors, (231), 9 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 18:51:14,685 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) [2021-06-10 18:51:14,686 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) [2021-06-10 18:51:14,686 INFO L185 Difference]: Start difference. First operand has 69 places, 39 transitions, 180 flow. Second operand 9 states and 231 transitions. [2021-06-10 18:51:14,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 39 transitions, 214 flow [2021-06-10 18:51:14,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 39 transitions, 173 flow, removed 3 selfloop flow, removed 10 redundant places. [2021-06-10 18:51:14,687 INFO L241 Difference]: Finished difference. Result has 59 places, 34 transitions, 132 flow [2021-06-10 18:51:14,687 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=132, PETRI_PLACES=59, PETRI_TRANSITIONS=34} [2021-06-10 18:51:14,687 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2021-06-10 18:51:14,687 INFO L480 AbstractCegarLoop]: Abstraction has has 59 places, 34 transitions, 132 flow [2021-06-10 18:51:14,687 INFO L481 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) [2021-06-10 18:51:14,687 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:51:14,687 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:51:14,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-10 18:51:14,688 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:51:14,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:51:14,688 INFO L82 PathProgramCache]: Analyzing trace with hash -886883617, now seen corresponding path program 13 times [2021-06-10 18:51:14,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:51:14,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607738928] [2021-06-10 18:51:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:51:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:51:14,710 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,710 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:14,710 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:51:14,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,718 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,718 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,724 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,730 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,730 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,736 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,737 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,754 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-06-10 18:51:14,755 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 18:51:14,763 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,763 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 18:51:14,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607738928] [2021-06-10 18:51:14,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:51:14,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-10 18:51:14,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232253675] [2021-06-10 18:51:14,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 18:51:14,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:51:14,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 18:51:14,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-10 18:51:14,768 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-10 18:51:14,769 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 34 transitions, 132 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) [2021-06-10 18:51:14,769 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:51:14,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-10 18:51:14,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:51:14,864 INFO L129 PetriNetUnfolder]: 2/51 cut-off events. [2021-06-10 18:51:14,864 INFO L130 PetriNetUnfolder]: For 39/43 co-relation queries the response was YES. [2021-06-10 18:51:14,864 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 51 events. 2/51 cut-off events. For 39/43 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 75 event pairs, 0 based on Foata normal form. 3/54 useless extension candidates. Maximal degree in co-relation 113. Up to 7 conditions per place. [2021-06-10 18:51:14,865 INFO L132 encePairwiseOnDemand]: 25/35 looper letters, 2 selfloop transitions, 10 changer transitions 0/35 dead transitions. [2021-06-10 18:51:14,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 35 transitions, 160 flow [2021-06-10 18:51:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-10 18:51:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-10 18:51:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2021-06-10 18:51:14,866 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.726984126984127 [2021-06-10 18:51:14,866 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 229 transitions. [2021-06-10 18:51:14,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 229 transitions. [2021-06-10 18:51:14,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:51:14,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 229 transitions. [2021-06-10 18:51:14,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 25.444444444444443) internal successors, (229), 9 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 18:51:14,867 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) [2021-06-10 18:51:14,867 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) [2021-06-10 18:51:14,867 INFO L185 Difference]: Start difference. First operand has 59 places, 34 transitions, 132 flow. Second operand 9 states and 229 transitions. [2021-06-10 18:51:14,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 35 transitions, 160 flow [2021-06-10 18:51:14,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 35 transitions, 135 flow, removed 3 selfloop flow, removed 10 redundant places. [2021-06-10 18:51:14,868 INFO L241 Difference]: Finished difference. Result has 53 places, 35 transitions, 136 flow [2021-06-10 18:51:14,868 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=136, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2021-06-10 18:51:14,868 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2021-06-10 18:51:14,868 INFO L480 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 136 flow [2021-06-10 18:51:14,869 INFO L481 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) [2021-06-10 18:51:14,869 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 18:51:14,869 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 18:51:14,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-10 18:51:14,869 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 18:51:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 18:51:14,869 INFO L82 PathProgramCache]: Analyzing trace with hash -664399081, now seen corresponding path program 14 times [2021-06-10 18:51:14,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 18:51:14,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699078819] [2021-06-10 18:51:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 18:51:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 18:51:14,878 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,878 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:14,880 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,880 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 18:51:14,882 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,887 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,893 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,893 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,899 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,900 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,906 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,906 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 18:51:14,914 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,916 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 18:51:14,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 18:51:14,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 18:51:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 18:51:14,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699078819] [2021-06-10 18:51:14,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 18:51:14,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-06-10 18:51:14,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424962026] [2021-06-10 18:51:14,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-10 18:51:14,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 18:51:14,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-10 18:51:14,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-10 18:51:14,926 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 35 [2021-06-10 18:51:14,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 136 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) [2021-06-10 18:51:14,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 18:51:14,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 35 [2021-06-10 18:51:14,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 18:51:14,990 INFO L129 PetriNetUnfolder]: 0/21 cut-off events. [2021-06-10 18:51:14,990 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-06-10 18:51:14,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 21 events. 0/21 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 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. [2021-06-10 18:51:14,991 INFO L132 encePairwiseOnDemand]: 27/35 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2021-06-10 18:51:14,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 21 transitions, 95 flow [2021-06-10 18:51:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-10 18:51:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-10 18:51:14,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2021-06-10 18:51:14,991 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2021-06-10 18:51:14,991 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 225 transitions. [2021-06-10 18:51:14,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 225 transitions. [2021-06-10 18:51:14,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 18:51:14,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 225 transitions. [2021-06-10 18:51:14,992 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) [2021-06-10 18:51:14,993 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) [2021-06-10 18:51:14,993 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) [2021-06-10 18:51:14,993 INFO L185 Difference]: Start difference. First operand has 53 places, 35 transitions, 136 flow. Second operand 9 states and 225 transitions. [2021-06-10 18:51:14,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 21 transitions, 95 flow [2021-06-10 18:51:14,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 21 transitions, 75 flow, removed 0 selfloop flow, removed 10 redundant places. [2021-06-10 18:51:14,993 INFO L241 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2021-06-10 18:51:14,993 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=31, 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=39, PETRI_TRANSITIONS=0} [2021-06-10 18:51:14,994 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2021-06-10 18:51:14,994 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2021-06-10 18:51:14,994 INFO L481 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) [2021-06-10 18:51:14,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-10 18:51:14,997 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 06:51:14 BasicIcfg [2021-06-10 18:51:14,997 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 18:51:14,998 INFO L168 Benchmark]: Toolchain (without parser) took 2661.40 ms. Allocated memory was 367.0 MB in the beginning and 440.4 MB in the end (delta: 73.4 MB). Free memory was 346.9 MB in the beginning and 368.4 MB in the end (delta: -21.5 MB). Peak memory consumption was 51.9 MB. Max. memory is 16.0 GB. [2021-06-10 18:51:14,998 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 367.0 MB. Free memory is still 348.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 18:51:14,998 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.72 ms. Allocated memory is still 367.0 MB. Free memory was 346.8 MB in the beginning and 345.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 18:51:14,998 INFO L168 Benchmark]: Boogie Preprocessor took 10.37 ms. Allocated memory is still 367.0 MB. Free memory was 345.3 MB in the beginning and 344.4 MB in the end (delta: 911.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 18:51:14,998 INFO L168 Benchmark]: RCFGBuilder took 197.49 ms. Allocated memory is still 367.0 MB. Free memory was 344.4 MB in the beginning and 332.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-10 18:51:14,999 INFO L168 Benchmark]: TraceAbstraction took 2430.66 ms. Allocated memory was 367.0 MB in the beginning and 440.4 MB in the end (delta: 73.4 MB). Free memory was 331.9 MB in the beginning and 368.4 MB in the end (delta: -36.4 MB). Peak memory consumption was 35.1 MB. Max. memory is 16.0 GB. [2021-06-10 18:51:14,999 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 0.09 ms. Allocated memory is still 367.0 MB. Free memory is still 348.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.72 ms. Allocated memory is still 367.0 MB. Free memory was 346.8 MB in the beginning and 345.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.37 ms. Allocated memory is still 367.0 MB. Free memory was 345.3 MB in the beginning and 344.4 MB in the end (delta: 911.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 197.49 ms. Allocated memory is still 367.0 MB. Free memory was 344.4 MB in the beginning and 332.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2430.66 ms. Allocated memory was 367.0 MB in the beginning and 440.4 MB in the end (delta: 73.4 MB). Free memory was 331.9 MB in the beginning and 368.4 MB in the end (delta: -36.4 MB). Peak memory consumption was 35.1 MB. Max. memory is 16.0 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 CFG has 3 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 8.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2325.3ms, OverallIterations: 14, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1263.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 76 SDtfs, 318 SDslu, 91 SDs, 0 SdLazy, 459 SolverSat, 156 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 249.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 162 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1018.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=289occurred in iteration=8, InterpolantAutomatonStates: 117, 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: 20.8ms SsaConstructionTime, 63.4ms SatisfiabilityAnalysisTime, 794.2ms InterpolantComputationTime, 434 NumberOfCodeBlocks, 434 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 420 ConstructedInterpolants, 0 QuantifiedInterpolants, 1596 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...