/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-RepeatedVariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/Bakery.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 07:54:47,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 07:54:47,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 07:54:47,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-25 07:54:47,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-25 07:54:47,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-25 07:54:47,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-25 07:54:47,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-25 07:54:47,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-25 07:54:47,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-25 07:54:47,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-25 07:54:47,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-25 07:54:47,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-25 07:54:47,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-25 07:54:47,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-25 07:54:47,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-25 07:54:47,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-25 07:54:47,269 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-RepeatedVariableLbe.epf [2021-03-25 07:54:47,299 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 07:54:47,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 07:54:47,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 07:54:47,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 07:54:47,301 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 07:54:47,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 07:54:47,302 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 07:54:47,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 07:54:47,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 07:54:47,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 07:54:47,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 07:54:47,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 07:54:47,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 07:54:47,303 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 07:54:47,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 07:54:47,304 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 07:54:47,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 07:54:47,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 07:54:47,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 07:54:47,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 07:54:47,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 07:54:47,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 07:54:47,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 07:54:47,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 07:54:47,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 07:54:47,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 07:54:47,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 07:54:47,306 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-25 07:54:47,306 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 07:54:47,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 07:54:47,306 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=true WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 07:54:47,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 07:54:47,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 07:54:47,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 07:54:47,592 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 07:54:47,593 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 07:54:47,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Bakery.bpl [2021-03-25 07:54:47,605 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Bakery.bpl' [2021-03-25 07:54:47,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 07:54:47,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 07:54:47,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 07:54:47,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 07:54:47,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 07:54:47,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:47" (1/1) ... [2021-03-25 07:54:47,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:47" (1/1) ... [2021-03-25 07:54:47,655 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 07:54:47,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 07:54:47,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 07:54:47,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 07:54:47,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:47" (1/1) ... [2021-03-25 07:54:47,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:47" (1/1) ... [2021-03-25 07:54:47,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:47" (1/1) ... [2021-03-25 07:54:47,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:47" (1/1) ... [2021-03-25 07:54:47,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:47" (1/1) ... [2021-03-25 07:54:47,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:47" (1/1) ... [2021-03-25 07:54:47,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:47" (1/1) ... [2021-03-25 07:54:47,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 07:54:47,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 07:54:47,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 07:54:47,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 07:54:47,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 07:54:47,736 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2021-03-25 07:54:47,737 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2021-03-25 07:54:47,738 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2021-03-25 07:54:47,738 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-03-25 07:54:47,738 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-03-25 07:54:47,738 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-03-25 07:54:47,738 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-25 07:54:47,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 07:54:47,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 07:54:47,739 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-25 07:54:47,914 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 07:54:47,915 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-25 07:54:47,916 INFO L202 PluginConnector]: Adding new model Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:54:47 BoogieIcfgContainer [2021-03-25 07:54:47,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 07:54:47,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 07:54:47,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 07:54:47,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 07:54:47,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:47" (1/2) ... [2021-03-25 07:54:47,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3158f33c and model type Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 07:54:47, skipping insertion in model container [2021-03-25 07:54:47,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:54:47" (2/2) ... [2021-03-25 07:54:47,930 INFO L111 eAbstractionObserver]: Analyzing ICFG Bakery.bpl [2021-03-25 07:54:47,937 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 07:54:47,940 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-03-25 07:54:47,941 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 07:54:47,988 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-25 07:54:48,004 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-25 07:54:48,033 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 07:54:48,033 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 07:54:48,033 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 07:54:48,033 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 07:54:48,033 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 07:54:48,034 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 07:54:48,034 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 07:54:48,034 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 07:54:48,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 62 flow [2021-03-25 07:54:48,067 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-03-25 07:54:48,067 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 07:54:48,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 24 events. 2/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 45 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2021-03-25 07:54:48,072 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 62 flow [2021-03-25 07:54:48,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 24 transitions, 54 flow [2021-03-25 07:54:48,077 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:48,087 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 29 places, 24 transitions, 54 flow [2021-03-25 07:54:48,090 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 29 places, 24 transitions, 54 flow [2021-03-25 07:54:48,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 24 transitions, 54 flow [2021-03-25 07:54:48,100 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-03-25 07:54:48,100 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 07:54:48,101 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 24 events. 2/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 46 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2021-03-25 07:54:48,104 INFO L142 LiptonReduction]: Number of co-enabled transitions 216 [2021-03-25 07:54:48,245 INFO L154 LiptonReduction]: Checked pairs total: 139 [2021-03-25 07:54:48,245 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-25 07:54:48,247 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 171 [2021-03-25 07:54:48,254 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-25 07:54:48,255 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 07:54:48,255 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:48,255 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-25 07:54:48,256 INFO L428 AbstractCegarLoop]: === Iteration 1 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 07:54:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash 103815741, now seen corresponding path program 1 times [2021-03-25 07:54:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:48,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641894557] [2021-03-25 07:54:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:48,370 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:48,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:48,383 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:48,383 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:54:48,392 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:48,392 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:54:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:48,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641894557] [2021-03-25 07:54:48,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:48,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 07:54:48,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208260446] [2021-03-25 07:54:48,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-25 07:54:48,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:48,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-25 07:54:48,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-25 07:54:48,413 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 30 [2021-03-25 07:54:48,414 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:48,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 30 [2021-03-25 07:54:48,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:48,457 INFO L129 PetriNetUnfolder]: 17/71 cut-off events. [2021-03-25 07:54:48,457 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 07:54:48,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 71 events. 17/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 237 event pairs, 4 based on Foata normal form. 3/64 useless extension candidates. Maximal degree in co-relation 106. Up to 24 conditions per place. [2021-03-25 07:54:48,459 INFO L132 encePairwiseOnDemand]: 23/30 looper letters, 10 selfloop transitions, 6 changer transitions 0/27 dead transitions. [2021-03-25 07:54:48,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 92 flow [2021-03-25 07:54:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 07:54:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 07:54:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2021-03-25 07:54:48,469 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2021-03-25 07:54:48,469 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 86 transitions. [2021-03-25 07:54:48,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 86 transitions. [2021-03-25 07:54:48,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:48,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 86 transitions. [2021-03-25 07:54:48,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,477 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,479 INFO L185 Difference]: Start difference. First operand has 25 places, 20 transitions, 46 flow. Second operand 4 states and 86 transitions. [2021-03-25 07:54:48,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 92 flow [2021-03-25 07:54:48,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 90 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-25 07:54:48,483 INFO L241 Difference]: Finished difference. Result has 26 places, 23 transitions, 78 flow [2021-03-25 07:54:48,484 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2021-03-25 07:54:48,485 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2021-03-25 07:54:48,485 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:48,485 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 26 places, 23 transitions, 78 flow [2021-03-25 07:54:48,486 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 26 places, 23 transitions, 78 flow [2021-03-25 07:54:48,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 26 places, 23 transitions, 78 flow [2021-03-25 07:54:48,492 INFO L129 PetriNetUnfolder]: 5/37 cut-off events. [2021-03-25 07:54:48,492 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 07:54:48,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 37 events. 5/37 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 86 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 56. Up to 7 conditions per place. [2021-03-25 07:54:48,494 INFO L142 LiptonReduction]: Number of co-enabled transitions 160 [2021-03-25 07:54:48,496 INFO L154 LiptonReduction]: Checked pairs total: 45 [2021-03-25 07:54:48,496 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:48,496 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 11 [2021-03-25 07:54:48,497 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 78 flow [2021-03-25 07:54:48,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,498 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:48,498 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-25 07:54:48,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 07:54:48,498 INFO L428 AbstractCegarLoop]: === Iteration 2 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 07:54:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:48,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1076046703, now seen corresponding path program 1 times [2021-03-25 07:54:48,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:48,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747915415] [2021-03-25 07:54:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:48,510 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:48,511 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:48,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747915415] [2021-03-25 07:54:48,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:48,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-25 07:54:48,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963378038] [2021-03-25 07:54:48,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-25 07:54:48,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:48,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-25 07:54:48,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-25 07:54:48,516 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 30 [2021-03-25 07:54:48,517 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,517 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:48,517 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 30 [2021-03-25 07:54:48,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:48,548 INFO L129 PetriNetUnfolder]: 37/122 cut-off events. [2021-03-25 07:54:48,549 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-25 07:54:48,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 122 events. 37/122 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 483 event pairs, 8 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 239. Up to 49 conditions per place. [2021-03-25 07:54:48,550 INFO L132 encePairwiseOnDemand]: 21/30 looper letters, 8 selfloop transitions, 7 changer transitions 0/29 dead transitions. [2021-03-25 07:54:48,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 120 flow [2021-03-25 07:54:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-25 07:54:48,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-25 07:54:48,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2021-03-25 07:54:48,552 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2021-03-25 07:54:48,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2021-03-25 07:54:48,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2021-03-25 07:54:48,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:48,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2021-03-25 07:54:48,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,554 INFO L185 Difference]: Start difference. First operand has 26 places, 23 transitions, 78 flow. Second operand 3 states and 65 transitions. [2021-03-25 07:54:48,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 120 flow [2021-03-25 07:54:48,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-25 07:54:48,557 INFO L241 Difference]: Finished difference. Result has 30 places, 29 transitions, 134 flow [2021-03-25 07:54:48,557 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2021-03-25 07:54:48,557 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2021-03-25 07:54:48,557 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:48,558 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 30 places, 29 transitions, 134 flow [2021-03-25 07:54:48,558 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 30 places, 29 transitions, 134 flow [2021-03-25 07:54:48,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 134 flow [2021-03-25 07:54:48,574 INFO L129 PetriNetUnfolder]: 38/122 cut-off events. [2021-03-25 07:54:48,574 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-03-25 07:54:48,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 122 events. 38/122 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 488 event pairs, 6 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 283. Up to 50 conditions per place. [2021-03-25 07:54:48,582 INFO L142 LiptonReduction]: Number of co-enabled transitions 140 [2021-03-25 07:54:48,586 INFO L154 LiptonReduction]: Checked pairs total: 9 [2021-03-25 07:54:48,586 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:48,587 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 30 [2021-03-25 07:54:48,587 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 134 flow [2021-03-25 07:54:48,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,588 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:48,588 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 07:54:48,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-25 07:54:48,589 INFO L428 AbstractCegarLoop]: === Iteration 3 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 07:54:48,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:48,590 INFO L82 PathProgramCache]: Analyzing trace with hash 381295873, now seen corresponding path program 1 times [2021-03-25 07:54:48,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:48,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492362382] [2021-03-25 07:54:48,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:48,609 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:48,609 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:48,612 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:48,613 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:48,617 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:48,618 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:54:48,625 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:48,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:54:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:48,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492362382] [2021-03-25 07:54:48,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:48,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 07:54:48,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706254824] [2021-03-25 07:54:48,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 07:54:48,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:48,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 07:54:48,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-25 07:54:48,629 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 30 [2021-03-25 07:54:48,629 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:48,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 30 [2021-03-25 07:54:48,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:48,690 INFO L129 PetriNetUnfolder]: 55/174 cut-off events. [2021-03-25 07:54:48,690 INFO L130 PetriNetUnfolder]: For 42/46 co-relation queries the response was YES. [2021-03-25 07:54:48,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 174 events. 55/174 cut-off events. For 42/46 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 496 event pairs, 13 based on Foata normal form. 10/181 useless extension candidates. Maximal degree in co-relation 456. Up to 64 conditions per place. [2021-03-25 07:54:48,693 INFO L132 encePairwiseOnDemand]: 23/30 looper letters, 10 selfloop transitions, 14 changer transitions 0/41 dead transitions. [2021-03-25 07:54:48,693 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 222 flow [2021-03-25 07:54:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-25 07:54:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-25 07:54:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2021-03-25 07:54:48,694 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2021-03-25 07:54:48,695 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 118 transitions. [2021-03-25 07:54:48,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 118 transitions. [2021-03-25 07:54:48,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:48,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 118 transitions. [2021-03-25 07:54:48,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,697 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,697 INFO L185 Difference]: Start difference. First operand has 30 places, 29 transitions, 134 flow. Second operand 6 states and 118 transitions. [2021-03-25 07:54:48,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 222 flow [2021-03-25 07:54:48,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 41 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-25 07:54:48,701 INFO L241 Difference]: Finished difference. Result has 37 places, 37 transitions, 211 flow [2021-03-25 07:54:48,701 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2021-03-25 07:54:48,701 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 12 predicate places. [2021-03-25 07:54:48,702 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:48,702 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 37 places, 37 transitions, 211 flow [2021-03-25 07:54:48,702 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 37 places, 37 transitions, 211 flow [2021-03-25 07:54:48,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 37 places, 37 transitions, 211 flow [2021-03-25 07:54:48,721 INFO L129 PetriNetUnfolder]: 47/154 cut-off events. [2021-03-25 07:54:48,721 INFO L130 PetriNetUnfolder]: For 63/64 co-relation queries the response was YES. [2021-03-25 07:54:48,722 INFO L84 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 154 events. 47/154 cut-off events. For 63/64 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 431 event pairs, 6 based on Foata normal form. 1/147 useless extension candidates. Maximal degree in co-relation 381. Up to 60 conditions per place. [2021-03-25 07:54:48,724 INFO L142 LiptonReduction]: Number of co-enabled transitions 184 [2021-03-25 07:54:48,727 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 07:54:48,727 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:48,727 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 25 [2021-03-25 07:54:48,728 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 211 flow [2021-03-25 07:54:48,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,728 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:48,729 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 07:54:48,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-25 07:54:48,729 INFO L428 AbstractCegarLoop]: === Iteration 4 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 07:54:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash 310846171, now seen corresponding path program 2 times [2021-03-25 07:54:48,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:48,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056213131] [2021-03-25 07:54:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:48,744 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:48,745 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:48,748 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:48,748 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:48,753 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:48,754 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:54:48,762 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:48,764 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:54:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:48,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056213131] [2021-03-25 07:54:48,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:48,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 07:54:48,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529310108] [2021-03-25 07:54:48,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 07:54:48,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:48,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 07:54:48,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-25 07:54:48,766 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 30 [2021-03-25 07:54:48,767 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:48,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 30 [2021-03-25 07:54:48,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:48,856 INFO L129 PetriNetUnfolder]: 59/200 cut-off events. [2021-03-25 07:54:48,858 INFO L130 PetriNetUnfolder]: For 185/191 co-relation queries the response was YES. [2021-03-25 07:54:48,860 INFO L84 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 200 events. 59/200 cut-off events. For 185/191 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 794 event pairs, 11 based on Foata normal form. 12/205 useless extension candidates. Maximal degree in co-relation 565. Up to 71 conditions per place. [2021-03-25 07:54:48,861 INFO L132 encePairwiseOnDemand]: 24/30 looper letters, 15 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2021-03-25 07:54:48,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 317 flow [2021-03-25 07:54:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 07:54:48,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 07:54:48,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2021-03-25 07:54:48,868 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.68 [2021-03-25 07:54:48,868 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 102 transitions. [2021-03-25 07:54:48,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 102 transitions. [2021-03-25 07:54:48,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:48,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 102 transitions. [2021-03-25 07:54:48,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,870 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,870 INFO L185 Difference]: Start difference. First operand has 37 places, 37 transitions, 211 flow. Second operand 5 states and 102 transitions. [2021-03-25 07:54:48,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 317 flow [2021-03-25 07:54:48,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 47 transitions, 306 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-03-25 07:54:48,874 INFO L241 Difference]: Finished difference. Result has 44 places, 40 transitions, 286 flow [2021-03-25 07:54:48,875 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2021-03-25 07:54:48,875 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 19 predicate places. [2021-03-25 07:54:48,875 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:48,875 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 40 transitions, 286 flow [2021-03-25 07:54:48,875 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 40 transitions, 286 flow [2021-03-25 07:54:48,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 40 transitions, 286 flow [2021-03-25 07:54:48,897 INFO L129 PetriNetUnfolder]: 49/166 cut-off events. [2021-03-25 07:54:48,898 INFO L130 PetriNetUnfolder]: For 184/185 co-relation queries the response was YES. [2021-03-25 07:54:48,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 166 events. 49/166 cut-off events. For 184/185 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 627 event pairs, 6 based on Foata normal form. 1/155 useless extension candidates. Maximal degree in co-relation 475. Up to 63 conditions per place. [2021-03-25 07:54:48,901 INFO L142 LiptonReduction]: Number of co-enabled transitions 198 [2021-03-25 07:54:48,907 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 07:54:48,907 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:48,907 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 32 [2021-03-25 07:54:48,911 INFO L480 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 286 flow [2021-03-25 07:54:48,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:48,911 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:48,911 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 07:54:48,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-25 07:54:48,911 INFO L428 AbstractCegarLoop]: === Iteration 5 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 07:54:48,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:48,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1382202857, now seen corresponding path program 1 times [2021-03-25 07:54:48,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:48,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996519995] [2021-03-25 07:54:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:48,965 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:48,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:48,984 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:48,984 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:48,989 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:48,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:49,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:49,002 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:54:49,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:49,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:54:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:49,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996519995] [2021-03-25 07:54:49,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:49,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-25 07:54:49,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957808901] [2021-03-25 07:54:49,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-25 07:54:49,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:49,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-25 07:54:49,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-25 07:54:49,018 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 30 [2021-03-25 07:54:49,019 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 286 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:49,019 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:49,019 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 30 [2021-03-25 07:54:49,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:49,096 INFO L129 PetriNetUnfolder]: 39/144 cut-off events. [2021-03-25 07:54:49,097 INFO L130 PetriNetUnfolder]: For 363/373 co-relation queries the response was YES. [2021-03-25 07:54:49,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 144 events. 39/144 cut-off events. For 363/373 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 452 event pairs, 6 based on Foata normal form. 12/152 useless extension candidates. Maximal degree in co-relation 504. Up to 47 conditions per place. [2021-03-25 07:54:49,099 INFO L132 encePairwiseOnDemand]: 24/30 looper letters, 11 selfloop transitions, 20 changer transitions 0/48 dead transitions. [2021-03-25 07:54:49,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 398 flow [2021-03-25 07:54:49,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-25 07:54:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-25 07:54:49,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2021-03-25 07:54:49,103 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2021-03-25 07:54:49,103 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 135 transitions. [2021-03-25 07:54:49,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 135 transitions. [2021-03-25 07:54:49,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:49,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 135 transitions. [2021-03-25 07:54:49,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:49,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:49,107 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:49,108 INFO L185 Difference]: Start difference. First operand has 44 places, 40 transitions, 286 flow. Second operand 7 states and 135 transitions. [2021-03-25 07:54:49,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 398 flow [2021-03-25 07:54:49,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 381 flow, removed 6 selfloop flow, removed 1 redundant places. [2021-03-25 07:54:49,117 INFO L241 Difference]: Finished difference. Result has 50 places, 42 transitions, 336 flow [2021-03-25 07:54:49,117 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=336, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2021-03-25 07:54:49,117 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 25 predicate places. [2021-03-25 07:54:49,118 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:49,118 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 50 places, 42 transitions, 336 flow [2021-03-25 07:54:49,118 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 50 places, 42 transitions, 336 flow [2021-03-25 07:54:49,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 50 places, 42 transitions, 336 flow [2021-03-25 07:54:49,131 INFO L129 PetriNetUnfolder]: 32/117 cut-off events. [2021-03-25 07:54:49,131 INFO L130 PetriNetUnfolder]: For 195/196 co-relation queries the response was YES. [2021-03-25 07:54:49,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 117 events. 32/117 cut-off events. For 195/196 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 328 event pairs, 3 based on Foata normal form. 1/112 useless extension candidates. Maximal degree in co-relation 370. Up to 40 conditions per place. [2021-03-25 07:54:49,133 INFO L142 LiptonReduction]: Number of co-enabled transitions 176 [2021-03-25 07:54:49,137 INFO L154 LiptonReduction]: Checked pairs total: 11 [2021-03-25 07:54:49,137 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:49,137 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 19 [2021-03-25 07:54:49,140 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 336 flow [2021-03-25 07:54:49,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:49,141 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:49,141 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 07:54:49,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-25 07:54:49,141 INFO L428 AbstractCegarLoop]: === Iteration 6 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 07:54:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:49,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1265854829, now seen corresponding path program 2 times [2021-03-25 07:54:49,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:49,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471929861] [2021-03-25 07:54:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:49,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:49,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:54:49,164 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:49,165 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:49,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:49,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:49,173 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:49,174 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:54:49,181 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:49,181 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:54:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:49,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471929861] [2021-03-25 07:54:49,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:49,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-25 07:54:49,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727553963] [2021-03-25 07:54:49,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 07:54:49,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:49,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 07:54:49,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-25 07:54:49,194 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 30 [2021-03-25 07:54:49,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 336 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:49,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:49,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 30 [2021-03-25 07:54:49,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:49,247 INFO L129 PetriNetUnfolder]: 37/139 cut-off events. [2021-03-25 07:54:49,247 INFO L130 PetriNetUnfolder]: For 478/493 co-relation queries the response was YES. [2021-03-25 07:54:49,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 139 events. 37/139 cut-off events. For 478/493 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 397 event pairs, 5 based on Foata normal form. 13/148 useless extension candidates. Maximal degree in co-relation 510. Up to 45 conditions per place. [2021-03-25 07:54:49,249 INFO L132 encePairwiseOnDemand]: 24/30 looper letters, 16 selfloop transitions, 16 changer transitions 0/49 dead transitions. [2021-03-25 07:54:49,249 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 49 transitions, 444 flow [2021-03-25 07:54:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 07:54:49,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 07:54:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2021-03-25 07:54:49,251 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2021-03-25 07:54:49,251 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 100 transitions. [2021-03-25 07:54:49,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 100 transitions. [2021-03-25 07:54:49,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:49,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 100 transitions. [2021-03-25 07:54:49,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:49,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:49,252 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:49,252 INFO L185 Difference]: Start difference. First operand has 50 places, 42 transitions, 336 flow. Second operand 5 states and 100 transitions. [2021-03-25 07:54:49,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 49 transitions, 444 flow [2021-03-25 07:54:49,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 389 flow, removed 7 selfloop flow, removed 6 redundant places. [2021-03-25 07:54:49,257 INFO L241 Difference]: Finished difference. Result has 49 places, 43 transitions, 334 flow [2021-03-25 07:54:49,257 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=334, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2021-03-25 07:54:49,257 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 24 predicate places. [2021-03-25 07:54:49,258 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:49,258 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 49 places, 43 transitions, 334 flow [2021-03-25 07:54:49,258 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 49 places, 43 transitions, 334 flow [2021-03-25 07:54:49,259 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 49 places, 43 transitions, 334 flow [2021-03-25 07:54:49,267 INFO L129 PetriNetUnfolder]: 29/114 cut-off events. [2021-03-25 07:54:49,267 INFO L130 PetriNetUnfolder]: For 215/218 co-relation queries the response was YES. [2021-03-25 07:54:49,267 INFO L84 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 114 events. 29/114 cut-off events. For 215/218 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 303 event pairs, 3 based on Foata normal form. 1/110 useless extension candidates. Maximal degree in co-relation 352. Up to 39 conditions per place. [2021-03-25 07:54:49,268 INFO L142 LiptonReduction]: Number of co-enabled transitions 176 [2021-03-25 07:54:49,272 INFO L154 LiptonReduction]: Checked pairs total: 10 [2021-03-25 07:54:49,272 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:49,272 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 14 [2021-03-25 07:54:49,274 INFO L480 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 334 flow [2021-03-25 07:54:49,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:49,274 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:49,274 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 07:54:49,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-25 07:54:49,274 INFO L428 AbstractCegarLoop]: === Iteration 7 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 07:54:49,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:49,275 INFO L82 PathProgramCache]: Analyzing trace with hash 234156435, now seen corresponding path program 1 times [2021-03-25 07:54:49,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:49,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20369504] [2021-03-25 07:54:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:49,309 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:49,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:54:49,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:49,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:49,313 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:49,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:49,316 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:49,317 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:49,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:49,322 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:54:49,329 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:49,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:54:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:49,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20369504] [2021-03-25 07:54:49,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:49,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-25 07:54:49,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462357862] [2021-03-25 07:54:49,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-25 07:54:49,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:49,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-25 07:54:49,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-25 07:54:49,331 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 30 [2021-03-25 07:54:49,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 334 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:49,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:49,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 30 [2021-03-25 07:54:49,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:49,369 INFO L129 PetriNetUnfolder]: 17/83 cut-off events. [2021-03-25 07:54:49,370 INFO L130 PetriNetUnfolder]: For 346/358 co-relation queries the response was YES. [2021-03-25 07:54:49,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 83 events. 17/83 cut-off events. For 346/358 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 175 event pairs, 1 based on Foata normal form. 11/94 useless extension candidates. Maximal degree in co-relation 336. Up to 21 conditions per place. [2021-03-25 07:54:49,370 INFO L132 encePairwiseOnDemand]: 24/30 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2021-03-25 07:54:49,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 425 flow [2021-03-25 07:54:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-25 07:54:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-25 07:54:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2021-03-25 07:54:49,371 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2021-03-25 07:54:49,372 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 133 transitions. [2021-03-25 07:54:49,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 133 transitions. [2021-03-25 07:54:49,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:49,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 133 transitions. [2021-03-25 07:54:49,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:49,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:49,373 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:49,373 INFO L185 Difference]: Start difference. First operand has 49 places, 43 transitions, 334 flow. Second operand 7 states and 133 transitions. [2021-03-25 07:54:49,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 425 flow [2021-03-25 07:54:49,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 43 transitions, 401 flow, removed 5 selfloop flow, removed 3 redundant places. [2021-03-25 07:54:49,376 INFO L241 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2021-03-25 07:54:49,376 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2021-03-25 07:54:49,376 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 25 predicate places. [2021-03-25 07:54:49,376 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:49,376 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 50 places, 0 transitions, 0 flow [2021-03-25 07:54:49,376 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 50 places, 0 transitions, 0 flow [2021-03-25 07:54:49,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 0 places, 0 transitions, 0 flow [2021-03-25 07:54:49,377 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-03-25 07:54:49,377 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 07:54:49,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 0 conditions, 0 events. 0/0 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 0. Compared 0 event pairs, 0 based on Foata normal form. 0/0 useless extension candidates. Maximal degree in co-relation 0. Up to 0 conditions per place. [2021-03-25 07:54:49,377 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 07:54:49,377 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 07:54:49,377 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:49,377 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1 [2021-03-25 07:54:49,377 INFO L480 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2021-03-25 07:54:49,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:49,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-25 07:54:49,381 INFO L202 PluginConnector]: Adding new model Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 07:54:49 BasicIcfg [2021-03-25 07:54:49,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 07:54:49,382 INFO L168 Benchmark]: Toolchain (without parser) took 1750.74 ms. Allocated memory was 255.9 MB in the beginning and 356.5 MB in the end (delta: 100.7 MB). Free memory was 236.5 MB in the beginning and 291.8 MB in the end (delta: -55.3 MB). Peak memory consumption was 45.6 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:49,382 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:54:49,382 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.77 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:49,383 INFO L168 Benchmark]: Boogie Preprocessor took 11.97 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:54:49,383 INFO L168 Benchmark]: RCFGBuilder took 246.16 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 239.8 MB in the end (delta: -5.9 MB). Peak memory consumption was 19.3 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:49,383 INFO L168 Benchmark]: TraceAbstraction took 1462.61 ms. Allocated memory was 255.9 MB in the beginning and 356.5 MB in the end (delta: 100.7 MB). Free memory was 239.4 MB in the beginning and 291.8 MB in the end (delta: -52.3 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:49,385 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 0.19 ms. Allocated memory is still 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.77 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.97 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 246.16 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 239.8 MB in the end (delta: -5.9 MB). Peak memory consumption was 19.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1462.61 ms. Allocated memory was 255.9 MB in the beginning and 356.5 MB in the end (delta: 100.7 MB). Free memory was 239.4 MB in the beginning and 291.8 MB in the end (delta: -52.3 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 154.6ms, 29 PlacesBefore, 25 PlacesAfterwards, 24 TransitionsBefore, 20 TransitionsAfterwards, 216 CoEnabledTransitionPairs, 3 FixpointIterations, 2 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 139 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 61, positive: 49, positive conditional: 0, positive unconditional: 49, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 33, positive: 29, positive conditional: 0, positive unconditional: 29, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 33, positive: 29, positive conditional: 0, positive unconditional: 29, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 61, positive: 20, positive conditional: 0, positive unconditional: 20, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 33, unknown conditional: 0, unknown unconditional: 33] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 9, Positive conditional cache size: 0, Positive unconditional cache size: 9, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10.6ms, 26 PlacesBefore, 26 PlacesAfterwards, 23 TransitionsBefore, 23 TransitionsAfterwards, 160 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 45 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 3, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 12, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 3, unknown conditional: 0, unknown unconditional: 3] , Statistics on independence cache: Total cache size (in pairs): 16, Positive cache size: 11, Positive conditional cache size: 0, Positive unconditional cache size: 11, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 28.7ms, 30 PlacesBefore, 30 PlacesAfterwards, 29 TransitionsBefore, 29 TransitionsAfterwards, 140 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 9 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , Statistics on independence cache: Total cache size (in pairs): 17, Positive cache size: 12, Positive conditional cache size: 0, Positive unconditional cache size: 12, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 25.2ms, 37 PlacesBefore, 37 PlacesAfterwards, 37 TransitionsBefore, 37 TransitionsAfterwards, 184 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 17, Positive cache size: 12, Positive conditional cache size: 0, Positive unconditional cache size: 12, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 31.4ms, 44 PlacesBefore, 44 PlacesAfterwards, 40 TransitionsBefore, 40 TransitionsAfterwards, 198 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 17, Positive cache size: 12, Positive conditional cache size: 0, Positive unconditional cache size: 12, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 19.4ms, 50 PlacesBefore, 50 PlacesAfterwards, 42 TransitionsBefore, 42 TransitionsAfterwards, 176 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 11 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 17, Positive cache size: 12, Positive conditional cache size: 0, Positive unconditional cache size: 12, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 14.2ms, 49 PlacesBefore, 49 PlacesAfterwards, 43 TransitionsBefore, 43 TransitionsAfterwards, 176 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 10 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 17, Positive cache size: 12, Positive conditional cache size: 0, Positive unconditional cache size: 12, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.7ms, 50 PlacesBefore, 0 PlacesAfterwards, 0 TransitionsBefore, 0 TransitionsAfterwards, 0 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 17, Positive cache size: 12, Positive conditional cache size: 0, Positive unconditional cache size: 12, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5 - PositiveResult [Line: 38]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 53]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1349.5ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 514.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 216.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 40 SDtfs, 65 SDslu, 18 SDs, 0 SdLazy, 134 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 116.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 142.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=336occurred in iteration=5, InterpolantAutomatonStates: 37, 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: 19.1ms SsaConstructionTime, 61.6ms SatisfiabilityAnalysisTime, 248.5ms InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 226 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 15/15 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...