/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 22:45:32,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 22:45:32,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 22:45:32,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 22:45:32,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 22:45:32,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 22:45:32,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 22:45:32,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 22:45:32,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 22:45:32,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 22:45:32,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 22:45:32,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 22:45:32,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 22:45:32,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 22:45:32,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 22:45:32,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 22:45:32,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 22:45:32,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 22:45:32,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 22:45:32,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 22:45:32,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 22:45:32,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 22:45:32,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 22:45:32,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 22:45:32,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 22:45:32,107 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-03-11 22:45:32,126 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 22:45:32,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 22:45:32,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 22:45:32,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 22:45:32,129 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 22:45:32,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 22:45:32,129 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 22:45:32,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 22:45:32,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 22:45:32,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 22:45:32,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 22:45:32,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 22:45:32,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 22:45:32,130 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 22:45:32,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 22:45:32,130 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 22:45:32,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 22:45:32,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 22:45:32,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 22:45:32,131 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 22:45:32,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 22:45:32,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 22:45:32,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 22:45:32,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 22:45:32,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 22:45:32,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 22:45:32,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 22:45:32,131 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 22:45:32,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 22:45:32,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 22:45:32,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 22:45:32,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 22:45:32,376 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 22:45:32,377 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 22:45:32,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl [2021-03-11 22:45:32,378 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl' [2021-03-11 22:45:32,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 22:45:32,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 22:45:32,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 22:45:32,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 22:45:32,414 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 22:45:32,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:45:32" (1/1) ... [2021-03-11 22:45:32,425 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:45:32" (1/1) ... [2021-03-11 22:45:32,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 22:45:32,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 22:45:32,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 22:45:32,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 22:45:32,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:45:32" (1/1) ... [2021-03-11 22:45:32,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:45:32" (1/1) ... [2021-03-11 22:45:32,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:45:32" (1/1) ... [2021-03-11 22:45:32,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:45:32" (1/1) ... [2021-03-11 22:45:32,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:45:32" (1/1) ... [2021-03-11 22:45:32,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:45:32" (1/1) ... [2021-03-11 22:45:32,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:45:32" (1/1) ... [2021-03-11 22:45:32,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 22:45:32,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 22:45:32,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 22:45:32,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 22:45:32,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:45:32" (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 [2021-03-11 22:45:32,496 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-03-11 22:45:32,496 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-03-11 22:45:32,496 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-03-11 22:45:32,497 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2021-03-11 22:45:32,497 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2021-03-11 22:45:32,497 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2021-03-11 22:45:32,497 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-03-11 22:45:32,497 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-03-11 22:45:32,497 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-03-11 22:45:32,497 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 22:45:32,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 22:45:32,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 22:45:32,498 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 22:45:32,577 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 22:45:32,577 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 22:45:32,578 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 10:45:32 BoogieIcfgContainer [2021-03-11 22:45:32,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 22:45:32,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 22:45:32,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 22:45:32,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 22:45:32,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:45:32" (1/2) ... [2021-03-11 22:45:32,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12270e58 and model type example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 10:45:32, skipping insertion in model container [2021-03-11 22:45:32,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 10:45:32" (2/2) ... [2021-03-11 22:45:32,582 INFO L111 eAbstractionObserver]: Analyzing ICFG example_3.bpl [2021-03-11 22:45:32,586 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 22:45:32,588 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 22:45:32,588 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 22:45:32,612 INFO L149 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2021-03-11 22:45:32,623 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 22:45:32,636 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 22:45:32,636 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 22:45:32,636 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 22:45:32,636 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 22:45:32,636 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 22:45:32,637 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 22:45:32,637 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 22:45:32,637 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 22:45:32,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 90 flow [2021-03-11 22:45:32,658 INFO L129 PetriNetUnfolder]: 5/24 cut-off events. [2021-03-11 22:45:32,658 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-03-11 22:45:32,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 24 events. 5/24 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 6 conditions per place. [2021-03-11 22:45:32,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 90 flow [2021-03-11 22:45:32,663 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 19 transitions, 74 flow [2021-03-11 22:45:32,665 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 22:45:32,671 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 23 places, 19 transitions, 74 flow [2021-03-11 22:45:32,673 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 23 places, 19 transitions, 74 flow [2021-03-11 22:45:32,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 23 places, 19 transitions, 74 flow [2021-03-11 22:45:32,689 INFO L129 PetriNetUnfolder]: 5/22 cut-off events. [2021-03-11 22:45:32,689 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-03-11 22:45:32,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 22 events. 5/22 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 6 conditions per place. [2021-03-11 22:45:32,691 INFO L116 LiptonReduction]: Number of co-enabled transitions 84 [2021-03-11 22:45:32,719 INFO L131 LiptonReduction]: Checked pairs total: 171 [2021-03-11 22:45:32,719 INFO L133 LiptonReduction]: Total number of compositions: 3 [2021-03-11 22:45:32,720 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 57 [2021-03-11 22:45:32,728 INFO L129 PetriNetUnfolder]: 5/18 cut-off events. [2021-03-11 22:45:32,728 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-03-11 22:45:32,728 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:45:32,729 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:45:32,729 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:45:32,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:45:32,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1779864332, now seen corresponding path program 1 times [2021-03-11 22:45:32,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:45:32,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575657849] [2021-03-11 22:45:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:45:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:45:32,804 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:32,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:45:32,811 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:32,812 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:45:32,816 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:32,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:45:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:45:32,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575657849] [2021-03-11 22:45:32,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:45:32,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 22:45:32,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915538721] [2021-03-11 22:45:32,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 22:45:32,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:45:32,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 22:45:32,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 22:45:32,832 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 27 [2021-03-11 22:45:32,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:32,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:45:32,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 27 [2021-03-11 22:45:32,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:45:32,843 INFO L129 PetriNetUnfolder]: 1/12 cut-off events. [2021-03-11 22:45:32,844 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-03-11 22:45:32,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 12 events. 1/12 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 3/15 useless extension candidates. Maximal degree in co-relation 11. Up to 3 conditions per place. [2021-03-11 22:45:32,844 INFO L132 encePairwiseOnDemand]: 24/27 looper letters, 1 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2021-03-11 22:45:32,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 12 transitions, 52 flow [2021-03-11 22:45:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 22:45:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 22:45:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2021-03-11 22:45:32,851 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9012345679012346 [2021-03-11 22:45:32,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 73 transitions. [2021-03-11 22:45:32,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 73 transitions. [2021-03-11 22:45:32,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:45:32,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 73 transitions. [2021-03-11 22:45:32,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:32,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:32,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:32,858 INFO L185 Difference]: Start difference. First operand has 20 places, 16 transitions, 68 flow. Second operand 3 states and 73 transitions. [2021-03-11 22:45:32,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 12 transitions, 52 flow [2021-03-11 22:45:32,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 12 transitions, 36 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-11 22:45:32,861 INFO L241 Difference]: Finished difference. Result has 16 places, 12 transitions, 34 flow [2021-03-11 22:45:32,862 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=34, PETRI_PLACES=16, PETRI_TRANSITIONS=12} [2021-03-11 22:45:32,863 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, -4 predicate places. [2021-03-11 22:45:32,863 INFO L480 AbstractCegarLoop]: Abstraction has has 16 places, 12 transitions, 34 flow [2021-03-11 22:45:32,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:32,863 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:45:32,863 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:45:32,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 22:45:32,863 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:45:32,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:45:32,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1780007552, now seen corresponding path program 1 times [2021-03-11 22:45:32,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:45:32,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894923236] [2021-03-11 22:45:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:45:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:45:32,899 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:32,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:45:32,903 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:32,904 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:45:32,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:32,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 22:45:32,925 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-03-11 22:45:32,926 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 22:45:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:45:32,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894923236] [2021-03-11 22:45:32,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:45:32,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 22:45:32,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958593300] [2021-03-11 22:45:32,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 22:45:32,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:45:32,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 22:45:32,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 22:45:32,941 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2021-03-11 22:45:32,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 12 transitions, 34 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:32,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:45:32,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2021-03-11 22:45:32,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:45:32,994 INFO L129 PetriNetUnfolder]: 6/33 cut-off events. [2021-03-11 22:45:32,994 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:45:32,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 33 events. 6/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 87 event pairs, 1 based on Foata normal form. 1/32 useless extension candidates. Maximal degree in co-relation 45. Up to 7 conditions per place. [2021-03-11 22:45:32,995 INFO L132 encePairwiseOnDemand]: 23/27 looper letters, 5 selfloop transitions, 2 changer transitions 1/16 dead transitions. [2021-03-11 22:45:32,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 16 transitions, 58 flow [2021-03-11 22:45:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 22:45:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 22:45:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2021-03-11 22:45:32,998 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2021-03-11 22:45:32,998 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2021-03-11 22:45:32,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2021-03-11 22:45:32,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:45:32,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2021-03-11 22:45:33,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.8) internal successors, (104), 5 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) [2021-03-11 22:45:33,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,001 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,001 INFO L185 Difference]: Start difference. First operand has 16 places, 12 transitions, 34 flow. Second operand 5 states and 104 transitions. [2021-03-11 22:45:33,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 16 transitions, 58 flow [2021-03-11 22:45:33,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 16 transitions, 57 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 22:45:33,002 INFO L241 Difference]: Finished difference. Result has 22 places, 13 transitions, 48 flow [2021-03-11 22:45:33,002 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=48, PETRI_PLACES=22, PETRI_TRANSITIONS=13} [2021-03-11 22:45:33,002 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2021-03-11 22:45:33,003 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 13 transitions, 48 flow [2021-03-11 22:45:33,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,003 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:45:33,003 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:45:33,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 22:45:33,003 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:45:33,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:45:33,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1719614002, now seen corresponding path program 2 times [2021-03-11 22:45:33,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:45:33,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101972723] [2021-03-11 22:45:33,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:45:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:45:33,045 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:33,047 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:45:33,048 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:33,048 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:45:33,055 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-11 22:45:33,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-11 22:45:33,065 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-03-11 22:45:33,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 22:45:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:45:33,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101972723] [2021-03-11 22:45:33,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:45:33,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 22:45:33,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262867785] [2021-03-11 22:45:33,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 22:45:33,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:45:33,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 22:45:33,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 22:45:33,078 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2021-03-11 22:45:33,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 13 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:45:33,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2021-03-11 22:45:33,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:45:33,115 INFO L129 PetriNetUnfolder]: 5/33 cut-off events. [2021-03-11 22:45:33,115 INFO L130 PetriNetUnfolder]: For 24/27 co-relation queries the response was YES. [2021-03-11 22:45:33,116 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 33 events. 5/33 cut-off events. For 24/27 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 99 event pairs, 0 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 63. Up to 7 conditions per place. [2021-03-11 22:45:33,116 INFO L132 encePairwiseOnDemand]: 23/27 looper letters, 5 selfloop transitions, 2 changer transitions 3/18 dead transitions. [2021-03-11 22:45:33,116 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 18 transitions, 92 flow [2021-03-11 22:45:33,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 22:45:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 22:45:33,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2021-03-11 22:45:33,120 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2021-03-11 22:45:33,120 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2021-03-11 22:45:33,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2021-03-11 22:45:33,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:45:33,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2021-03-11 22:45:33,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.8) internal successors, (104), 5 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) [2021-03-11 22:45:33,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,122 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,122 INFO L185 Difference]: Start difference. First operand has 22 places, 13 transitions, 48 flow. Second operand 5 states and 104 transitions. [2021-03-11 22:45:33,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 18 transitions, 92 flow [2021-03-11 22:45:33,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 18 transitions, 85 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-11 22:45:33,124 INFO L241 Difference]: Finished difference. Result has 26 places, 13 transitions, 58 flow [2021-03-11 22:45:33,124 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=58, PETRI_PLACES=26, PETRI_TRANSITIONS=13} [2021-03-11 22:45:33,124 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2021-03-11 22:45:33,124 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 13 transitions, 58 flow [2021-03-11 22:45:33,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,124 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:45:33,124 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:45:33,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 22:45:33,125 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:45:33,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:45:33,125 INFO L82 PathProgramCache]: Analyzing trace with hash 864307348, now seen corresponding path program 3 times [2021-03-11 22:45:33,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:45:33,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545641324] [2021-03-11 22:45:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:45:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:45:33,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:33,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:45:33,171 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:33,172 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:45:33,177 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-11 22:45:33,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-11 22:45:33,188 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-03-11 22:45:33,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 22:45:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:45:33,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545641324] [2021-03-11 22:45:33,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:45:33,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 22:45:33,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540731824] [2021-03-11 22:45:33,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 22:45:33,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:45:33,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 22:45:33,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 22:45:33,200 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2021-03-11 22:45:33,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 13 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:45:33,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2021-03-11 22:45:33,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:45:33,223 INFO L129 PetriNetUnfolder]: 4/30 cut-off events. [2021-03-11 22:45:33,223 INFO L130 PetriNetUnfolder]: For 42/45 co-relation queries the response was YES. [2021-03-11 22:45:33,224 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 30 events. 4/30 cut-off events. For 42/45 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 82 event pairs, 1 based on Foata normal form. 1/30 useless extension candidates. Maximal degree in co-relation 64. Up to 6 conditions per place. [2021-03-11 22:45:33,225 INFO L132 encePairwiseOnDemand]: 23/27 looper letters, 5 selfloop transitions, 3 changer transitions 1/17 dead transitions. [2021-03-11 22:45:33,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 17 transitions, 99 flow [2021-03-11 22:45:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 22:45:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 22:45:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2021-03-11 22:45:33,228 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2021-03-11 22:45:33,228 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2021-03-11 22:45:33,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2021-03-11 22:45:33,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:45:33,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2021-03-11 22:45:33,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.8) internal successors, (104), 5 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) [2021-03-11 22:45:33,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,231 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,231 INFO L185 Difference]: Start difference. First operand has 26 places, 13 transitions, 58 flow. Second operand 5 states and 104 transitions. [2021-03-11 22:45:33,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 17 transitions, 99 flow [2021-03-11 22:45:33,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 81 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-03-11 22:45:33,233 INFO L241 Difference]: Finished difference. Result has 28 places, 14 transitions, 69 flow [2021-03-11 22:45:33,233 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=69, PETRI_PLACES=28, PETRI_TRANSITIONS=14} [2021-03-11 22:45:33,233 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2021-03-11 22:45:33,233 INFO L480 AbstractCegarLoop]: Abstraction has has 28 places, 14 transitions, 69 flow [2021-03-11 22:45:33,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,233 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:45:33,233 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:45:33,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 22:45:33,234 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:45:33,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:45:33,234 INFO L82 PathProgramCache]: Analyzing trace with hash 71195792, now seen corresponding path program 4 times [2021-03-11 22:45:33,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:45:33,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452872473] [2021-03-11 22:45:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:45:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:45:33,264 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:33,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:45:33,266 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:33,267 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:45:33,280 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:33,281 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 22:45:33,294 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-03-11 22:45:33,296 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 22:45:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:45:33,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452872473] [2021-03-11 22:45:33,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:45:33,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 22:45:33,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178963597] [2021-03-11 22:45:33,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 22:45:33,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:45:33,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 22:45:33,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 22:45:33,307 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2021-03-11 22:45:33,307 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 14 transitions, 69 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,307 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:45:33,307 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2021-03-11 22:45:33,307 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:45:33,346 INFO L129 PetriNetUnfolder]: 4/27 cut-off events. [2021-03-11 22:45:33,346 INFO L130 PetriNetUnfolder]: For 34/36 co-relation queries the response was YES. [2021-03-11 22:45:33,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 27 events. 4/27 cut-off events. For 34/36 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 66 event pairs, 1 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 63. Up to 6 conditions per place. [2021-03-11 22:45:33,347 INFO L132 encePairwiseOnDemand]: 23/27 looper letters, 3 selfloop transitions, 1 changer transitions 4/16 dead transitions. [2021-03-11 22:45:33,347 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 16 transitions, 99 flow [2021-03-11 22:45:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 22:45:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 22:45:33,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2021-03-11 22:45:33,349 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.762962962962963 [2021-03-11 22:45:33,349 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 103 transitions. [2021-03-11 22:45:33,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 103 transitions. [2021-03-11 22:45:33,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:45:33,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 103 transitions. [2021-03-11 22:45:33,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,350 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,351 INFO L185 Difference]: Start difference. First operand has 28 places, 14 transitions, 69 flow. Second operand 5 states and 103 transitions. [2021-03-11 22:45:33,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 16 transitions, 99 flow [2021-03-11 22:45:33,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 16 transitions, 95 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-11 22:45:33,353 INFO L241 Difference]: Finished difference. Result has 31 places, 12 transitions, 56 flow [2021-03-11 22:45:33,354 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=56, PETRI_PLACES=31, PETRI_TRANSITIONS=12} [2021-03-11 22:45:33,354 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2021-03-11 22:45:33,354 INFO L480 AbstractCegarLoop]: Abstraction has has 31 places, 12 transitions, 56 flow [2021-03-11 22:45:33,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,354 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:45:33,354 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:45:33,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 22:45:33,354 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:45:33,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:45:33,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1816650482, now seen corresponding path program 5 times [2021-03-11 22:45:33,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:45:33,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758827615] [2021-03-11 22:45:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:45:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:45:33,384 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:33,385 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:45:33,386 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:33,389 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:45:33,400 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-11 22:45:33,400 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-11 22:45:33,408 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-03-11 22:45:33,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 22:45:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:45:33,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758827615] [2021-03-11 22:45:33,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:45:33,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 22:45:33,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682645625] [2021-03-11 22:45:33,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 22:45:33,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:45:33,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 22:45:33,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 22:45:33,417 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2021-03-11 22:45:33,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 12 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:45:33,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2021-03-11 22:45:33,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:45:33,435 INFO L129 PetriNetUnfolder]: 2/20 cut-off events. [2021-03-11 22:45:33,435 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-11 22:45:33,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 20 events. 2/20 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2021-03-11 22:45:33,435 INFO L132 encePairwiseOnDemand]: 23/27 looper letters, 3 selfloop transitions, 1 changer transitions 2/14 dead transitions. [2021-03-11 22:45:33,435 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 14 transitions, 87 flow [2021-03-11 22:45:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 22:45:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 22:45:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2021-03-11 22:45:33,436 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7555555555555555 [2021-03-11 22:45:33,436 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 102 transitions. [2021-03-11 22:45:33,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 102 transitions. [2021-03-11 22:45:33,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:45:33,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 102 transitions. [2021-03-11 22:45:33,437 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) [2021-03-11 22:45:33,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,438 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,438 INFO L185 Difference]: Start difference. First operand has 31 places, 12 transitions, 56 flow. Second operand 5 states and 102 transitions. [2021-03-11 22:45:33,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 14 transitions, 87 flow [2021-03-11 22:45:33,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 14 transitions, 59 flow, removed 5 selfloop flow, removed 9 redundant places. [2021-03-11 22:45:33,439 INFO L241 Difference]: Finished difference. Result has 26 places, 12 transitions, 46 flow [2021-03-11 22:45:33,439 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=46, PETRI_PLACES=26, PETRI_TRANSITIONS=12} [2021-03-11 22:45:33,439 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2021-03-11 22:45:33,439 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 12 transitions, 46 flow [2021-03-11 22:45:33,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,439 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:45:33,439 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:45:33,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 22:45:33,440 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:45:33,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:45:33,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1776243384, now seen corresponding path program 1 times [2021-03-11 22:45:33,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:45:33,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054347726] [2021-03-11 22:45:33,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:45:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:45:33,446 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:33,446 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:45:33,447 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:33,447 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:45:33,449 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:33,450 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:45:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:45:33,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054347726] [2021-03-11 22:45:33,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:45:33,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 22:45:33,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321927530] [2021-03-11 22:45:33,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 22:45:33,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:45:33,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 22:45:33,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 22:45:33,451 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 27 [2021-03-11 22:45:33,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 12 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:45:33,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 27 [2021-03-11 22:45:33,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:45:33,454 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-11 22:45:33,454 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-03-11 22:45:33,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 11 events. 0/11 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/12 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 22:45:33,455 INFO L132 encePairwiseOnDemand]: 25/27 looper letters, 1 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2021-03-11 22:45:33,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 10 transitions, 44 flow [2021-03-11 22:45:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 22:45:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 22:45:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2021-03-11 22:45:33,455 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2021-03-11 22:45:33,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 72 transitions. [2021-03-11 22:45:33,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 72 transitions. [2021-03-11 22:45:33,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:45:33,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 72 transitions. [2021-03-11 22:45:33,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,457 INFO L185 Difference]: Start difference. First operand has 26 places, 12 transitions, 46 flow. Second operand 3 states and 72 transitions. [2021-03-11 22:45:33,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 10 transitions, 44 flow [2021-03-11 22:45:33,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 10 transitions, 35 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-03-11 22:45:33,457 INFO L241 Difference]: Finished difference. Result has 21 places, 10 transitions, 33 flow [2021-03-11 22:45:33,457 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=31, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=33, PETRI_PLACES=21, PETRI_TRANSITIONS=10} [2021-03-11 22:45:33,458 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2021-03-11 22:45:33,458 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 10 transitions, 33 flow [2021-03-11 22:45:33,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,458 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:45:33,458 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:45:33,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 22:45:33,458 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:45:33,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:45:33,458 INFO L82 PathProgramCache]: Analyzing trace with hash 957775952, now seen corresponding path program 6 times [2021-03-11 22:45:33,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:45:33,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467570213] [2021-03-11 22:45:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:45:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:45:33,469 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:33,469 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:45:33,469 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:45:33,470 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:45:33,474 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-11 22:45:33,475 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-11 22:45:33,483 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-03-11 22:45:33,483 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 22:45:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:45:33,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467570213] [2021-03-11 22:45:33,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:45:33,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 22:45:33,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085619891] [2021-03-11 22:45:33,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 22:45:33,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:45:33,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 22:45:33,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 22:45:33,492 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2021-03-11 22:45:33,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 10 transitions, 33 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:45:33,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2021-03-11 22:45:33,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:45:33,507 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-11 22:45:33,507 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 22:45:33,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 10 events. 0/10 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 22:45:33,507 INFO L132 encePairwiseOnDemand]: 23/27 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-03-11 22:45:33,507 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 10 transitions, 43 flow [2021-03-11 22:45:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 22:45:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 22:45:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2021-03-11 22:45:33,508 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2021-03-11 22:45:33,508 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 100 transitions. [2021-03-11 22:45:33,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 100 transitions. [2021-03-11 22:45:33,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:45:33,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 100 transitions. [2021-03-11 22:45:33,509 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) [2021-03-11 22:45:33,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,509 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,509 INFO L185 Difference]: Start difference. First operand has 21 places, 10 transitions, 33 flow. Second operand 5 states and 100 transitions. [2021-03-11 22:45:33,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 10 transitions, 43 flow [2021-03-11 22:45:33,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 10 transitions, 42 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 22:45:33,510 INFO L241 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2021-03-11 22:45:33,510 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2021-03-11 22:45:33,510 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2021-03-11 22:45:33,510 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2021-03-11 22:45:33,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:45:33,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 22:45:33,512 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 10:45:33 BasicIcfg [2021-03-11 22:45:33,513 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 22:45:33,513 INFO L168 Benchmark]: Toolchain (without parser) took 1102.97 ms. Allocated memory is still 364.9 MB. Free memory was 345.7 MB in the beginning and 241.6 MB in the end (delta: 104.1 MB). Peak memory consumption was 106.9 MB. Max. memory is 16.0 GB. [2021-03-11 22:45:33,513 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 364.9 MB. Free memory was 346.7 MB in the beginning and 346.6 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 22:45:33,514 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.35 ms. Allocated memory is still 364.9 MB. Free memory was 345.2 MB in the beginning and 343.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-03-11 22:45:33,514 INFO L168 Benchmark]: Boogie Preprocessor took 9.00 ms. Allocated memory is still 364.9 MB. Free memory was 343.7 MB in the beginning and 342.8 MB in the end (delta: 857.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 22:45:33,514 INFO L168 Benchmark]: RCFGBuilder took 136.89 ms. Allocated memory is still 364.9 MB. Free memory was 342.7 MB in the beginning and 333.9 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-11 22:45:33,514 INFO L168 Benchmark]: TraceAbstraction took 933.48 ms. Allocated memory is still 364.9 MB. Free memory was 333.5 MB in the beginning and 241.6 MB in the end (delta: 91.9 MB). Peak memory consumption was 92.3 MB. Max. memory is 16.0 GB. [2021-03-11 22:45:33,515 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 364.9 MB. Free memory was 346.7 MB in the beginning and 346.6 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.35 ms. Allocated memory is still 364.9 MB. Free memory was 345.2 MB in the beginning and 343.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.00 ms. Allocated memory is still 364.9 MB. Free memory was 343.7 MB in the beginning and 342.8 MB in the end (delta: 857.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 136.89 ms. Allocated memory is still 364.9 MB. Free memory was 342.7 MB in the beginning and 333.9 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 933.48 ms. Allocated memory is still 364.9 MB. Free memory was 333.5 MB in the beginning and 241.6 MB in the end (delta: 91.9 MB). Peak memory consumption was 92.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 46.3ms, 23 PlacesBefore, 20 PlacesAfterwards, 19 TransitionsBefore, 16 TransitionsAfterwards, 84 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 171 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 171, positive: 171, positive conditional: 0, positive unconditional: 171, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 54, positive: 54, positive conditional: 0, positive unconditional: 54, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 54, positive: 54, positive conditional: 0, positive unconditional: 54, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.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] , SemanticIndependenceRelation.Query Time [ms]: [ 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: 171, positive: 117, positive conditional: 0, positive unconditional: 117, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 54, unknown conditional: 0, unknown unconditional: 54] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 19]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 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: 877.0ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 272.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 87.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 34 SDtfs, 29 SDslu, 15 SDs, 0 SdLazy, 53 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 49.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 216.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=4, InterpolantAutomatonStates: 36, 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: 11.4ms SsaConstructionTime, 23.1ms SatisfiabilityAnalysisTime, 383.8ms InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 614 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...