/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/weaver-benchmarks/generated/test/easy6.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 02:33:19,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 02:33:19,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 02:33:19,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-25 02:33:19,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-25 02:33:19,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-25 02:33:19,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-25 02:33:19,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-25 02:33:19,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-25 02:33:19,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-25 02:33:19,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-25 02:33:19,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-25 02:33:19,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-25 02:33:19,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-25 02:33:19,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-25 02:33:19,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-25 02:33:19,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-25 02:33:19,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-25 02:33:19,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-25 02:33:19,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-25 02:33:19,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-25 02:33:19,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-25 02:33:19,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-25 02:33:19,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-25 02:33:19,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-25 02:33:19,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-25 02:33:19,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-25 02:33:19,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-25 02:33:19,349 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 [2021-03-25 02:33:19,383 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 02:33:19,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 02:33:19,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 02:33:19,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 02:33:19,386 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 02:33:19,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 02:33:19,386 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 02:33:19,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 02:33:19,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 02:33:19,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 02:33:19,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 02:33:19,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 02:33:19,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 02:33:19,388 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 02:33:19,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 02:33:19,388 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 02:33:19,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 02:33:19,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 02:33:19,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 02:33:19,389 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 02:33:19,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 02:33:19,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 02:33:19,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 02:33:19,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 02:33:19,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 02:33:19,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 02:33:19,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 02:33:19,390 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 02:33:19,390 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 02:33:19,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 02:33:19,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 02:33:19,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 02:33:19,678 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 02:33:19,679 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 02:33:19,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl [2021-03-25 02:33:19,680 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl' [2021-03-25 02:33:19,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 02:33:19,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 02:33:19,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 02:33:19,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 02:33:19,713 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 02:33:19,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 02:33:19" (1/1) ... [2021-03-25 02:33:19,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 02:33:19" (1/1) ... [2021-03-25 02:33:19,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 02:33:19,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 02:33:19,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 02:33:19,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 02:33:19,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 02:33:19" (1/1) ... [2021-03-25 02:33:19,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 02:33:19" (1/1) ... [2021-03-25 02:33:19,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 02:33:19" (1/1) ... [2021-03-25 02:33:19,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 02:33:19" (1/1) ... [2021-03-25 02:33:19,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 02:33:19" (1/1) ... [2021-03-25 02:33:19,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 02:33:19" (1/1) ... [2021-03-25 02:33:19,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 02:33:19" (1/1) ... [2021-03-25 02:33:19,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 02:33:19,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 02:33:19,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 02:33:19,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 02:33:19,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 02:33:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 02:33:19,815 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-25 02:33:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-25 02:33:19,816 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-25 02:33:19,816 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-25 02:33:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-25 02:33:19,816 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-25 02:33:19,816 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-25 02:33:19,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 02:33:19,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 02:33:19,817 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-25 02:33:19,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 02:33:19,971 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-25 02:33:19,972 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 02:33:19 BoogieIcfgContainer [2021-03-25 02:33:19,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 02:33:19,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 02:33:19,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 02:33:19,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 02:33:19,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 02:33:19" (1/2) ... [2021-03-25 02:33:19,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23cfde11 and model type easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 02:33:19, skipping insertion in model container [2021-03-25 02:33:19,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 02:33:19" (2/2) ... [2021-03-25 02:33:19,977 INFO L111 eAbstractionObserver]: Analyzing ICFG easy6.wvr.bpl [2021-03-25 02:33:19,981 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 02:33:19,984 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-25 02:33:19,984 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 02:33:20,013 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-25 02:33:20,028 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-25 02:33:20,046 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 02:33:20,047 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 02:33:20,047 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 02:33:20,047 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 02:33:20,047 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 02:33:20,047 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 02:33:20,047 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 02:33:20,047 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 02:33:20,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 42 places, 35 transitions, 86 flow [2021-03-25 02:33:20,092 INFO L129 PetriNetUnfolder]: 0/33 cut-off events. [2021-03-25 02:33:20,092 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 02:33:20,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 0/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 02:33:20,093 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 35 transitions, 86 flow [2021-03-25 02:33:20,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 31 transitions, 74 flow [2021-03-25 02:33:20,098 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 02:33:20,116 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 38 places, 31 transitions, 74 flow [2021-03-25 02:33:20,120 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 38 places, 31 transitions, 74 flow [2021-03-25 02:33:20,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 74 flow [2021-03-25 02:33:20,147 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2021-03-25 02:33:20,148 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 02:33:20,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 0/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 21 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 02:33:20,149 INFO L142 LiptonReduction]: Number of co-enabled transitions 240 [2021-03-25 02:33:20,579 INFO L154 LiptonReduction]: Checked pairs total: 758 [2021-03-25 02:33:20,580 INFO L156 LiptonReduction]: Total number of compositions: 10 [2021-03-25 02:33:20,584 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 487 [2021-03-25 02:33:20,603 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-03-25 02:33:20,603 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 02:33:20,603 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 02:33:20,604 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 02:33:20,605 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 02:33:20,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 02:33:20,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1595522395, now seen corresponding path program 1 times [2021-03-25 02:33:20,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 02:33:20,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325579426] [2021-03-25 02:33:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 02:33:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 02:33:20,780 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:20,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:20,789 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:20,790 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:20,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:20,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:20,805 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:20,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:20,817 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-25 02:33:20,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 02:33:20,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325579426] [2021-03-25 02:33:20,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 02:33:20,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-25 02:33:20,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406928137] [2021-03-25 02:33:20,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 02:33:20,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 02:33:20,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 02:33:20,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-25 02:33:20,848 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 45 [2021-03-25 02:33:20,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 54 flow. Second operand has 7 states, 7 states have (on average 35.857142857142854) internal successors, (251), 7 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:20,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 02:33:20,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 45 [2021-03-25 02:33:20,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 02:33:20,956 INFO L129 PetriNetUnfolder]: 1/45 cut-off events. [2021-03-25 02:33:20,957 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-03-25 02:33:20,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 45 events. 1/45 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 114 event pairs, 0 based on Foata normal form. 1/45 useless extension candidates. Maximal degree in co-relation 52. Up to 5 conditions per place. [2021-03-25 02:33:20,959 INFO L132 encePairwiseOnDemand]: 39/45 looper letters, 7 selfloop transitions, 7 changer transitions 2/31 dead transitions. [2021-03-25 02:33:20,959 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 106 flow [2021-03-25 02:33:20,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-25 02:33:20,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-25 02:33:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 297 transitions. [2021-03-25 02:33:20,969 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.825 [2021-03-25 02:33:20,969 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 297 transitions. [2021-03-25 02:33:20,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 297 transitions. [2021-03-25 02:33:20,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 02:33:20,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 297 transitions. [2021-03-25 02:33:20,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 37.125) internal successors, (297), 8 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:20,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:20,981 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:20,982 INFO L185 Difference]: Start difference. First operand has 28 places, 21 transitions, 54 flow. Second operand 8 states and 297 transitions. [2021-03-25 02:33:20,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 106 flow [2021-03-25 02:33:20,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-25 02:33:20,986 INFO L241 Difference]: Finished difference. Result has 34 places, 26 transitions, 84 flow [2021-03-25 02:33:20,987 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=84, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2021-03-25 02:33:20,988 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2021-03-25 02:33:20,988 INFO L480 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 84 flow [2021-03-25 02:33:20,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 35.857142857142854) internal successors, (251), 7 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:20,989 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 02:33:20,989 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 02:33:20,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 02:33:20,989 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 02:33:20,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 02:33:20,989 INFO L82 PathProgramCache]: Analyzing trace with hash -317260477, now seen corresponding path program 2 times [2021-03-25 02:33:20,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 02:33:20,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730705907] [2021-03-25 02:33:20,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 02:33:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 02:33:21,017 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,018 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,022 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,028 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,029 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,035 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,036 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,044 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-25 02:33:21,044 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 02:33:21,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730705907] [2021-03-25 02:33:21,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 02:33:21,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-25 02:33:21,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404962752] [2021-03-25 02:33:21,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 02:33:21,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 02:33:21,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 02:33:21,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-25 02:33:21,056 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 45 [2021-03-25 02:33:21,056 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 84 flow. Second operand has 7 states, 7 states have (on average 35.857142857142854) internal successors, (251), 7 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 02:33:21,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 45 [2021-03-25 02:33:21,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 02:33:21,128 INFO L129 PetriNetUnfolder]: 1/39 cut-off events. [2021-03-25 02:33:21,129 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-03-25 02:33:21,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 39 events. 1/39 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 1/40 useless extension candidates. Maximal degree in co-relation 69. Up to 5 conditions per place. [2021-03-25 02:33:21,129 INFO L132 encePairwiseOnDemand]: 39/45 looper letters, 4 selfloop transitions, 6 changer transitions 4/29 dead transitions. [2021-03-25 02:33:21,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 29 transitions, 126 flow [2021-03-25 02:33:21,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-25 02:33:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-25 02:33:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 294 transitions. [2021-03-25 02:33:21,132 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8166666666666667 [2021-03-25 02:33:21,132 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 294 transitions. [2021-03-25 02:33:21,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 294 transitions. [2021-03-25 02:33:21,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 02:33:21,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 294 transitions. [2021-03-25 02:33:21,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 36.75) internal successors, (294), 8 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,135 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,135 INFO L185 Difference]: Start difference. First operand has 34 places, 26 transitions, 84 flow. Second operand 8 states and 294 transitions. [2021-03-25 02:33:21,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 29 transitions, 126 flow [2021-03-25 02:33:21,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 29 transitions, 122 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-03-25 02:33:21,137 INFO L241 Difference]: Finished difference. Result has 39 places, 23 transitions, 83 flow [2021-03-25 02:33:21,137 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=83, PETRI_PLACES=39, PETRI_TRANSITIONS=23} [2021-03-25 02:33:21,138 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, 11 predicate places. [2021-03-25 02:33:21,138 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 23 transitions, 83 flow [2021-03-25 02:33:21,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 35.857142857142854) internal successors, (251), 7 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,138 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 02:33:21,138 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 02:33:21,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-25 02:33:21,139 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 02:33:21,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 02:33:21,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1555764699, now seen corresponding path program 3 times [2021-03-25 02:33:21,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 02:33:21,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694616256] [2021-03-25 02:33:21,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 02:33:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 02:33:21,157 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,158 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,158 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,159 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 02:33:21,161 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 02:33:21,165 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,165 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 02:33:21,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,170 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,178 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 02:33:21,187 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 02:33:21,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694616256] [2021-03-25 02:33:21,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 02:33:21,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-25 02:33:21,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422936922] [2021-03-25 02:33:21,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 02:33:21,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 02:33:21,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 02:33:21,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-25 02:33:21,190 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 45 [2021-03-25 02:33:21,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 23 transitions, 83 flow. Second operand has 7 states, 7 states have (on average 28.285714285714285) internal successors, (198), 7 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 02:33:21,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 45 [2021-03-25 02:33:21,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 02:33:21,279 INFO L129 PetriNetUnfolder]: 17/110 cut-off events. [2021-03-25 02:33:21,279 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2021-03-25 02:33:21,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 110 events. 17/110 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 446 event pairs, 3 based on Foata normal form. 2/111 useless extension candidates. Maximal degree in co-relation 216. Up to 14 conditions per place. [2021-03-25 02:33:21,281 INFO L132 encePairwiseOnDemand]: 36/45 looper letters, 14 selfloop transitions, 13 changer transitions 4/45 dead transitions. [2021-03-25 02:33:21,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 189 flow [2021-03-25 02:33:21,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-25 02:33:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-25 02:33:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 275 transitions. [2021-03-25 02:33:21,282 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6790123456790124 [2021-03-25 02:33:21,282 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 275 transitions. [2021-03-25 02:33:21,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 275 transitions. [2021-03-25 02:33:21,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 02:33:21,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 275 transitions. [2021-03-25 02:33:21,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.555555555555557) internal successors, (275), 9 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,285 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,286 INFO L185 Difference]: Start difference. First operand has 39 places, 23 transitions, 83 flow. Second operand 9 states and 275 transitions. [2021-03-25 02:33:21,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 189 flow [2021-03-25 02:33:21,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 166 flow, removed 2 selfloop flow, removed 10 redundant places. [2021-03-25 02:33:21,288 INFO L241 Difference]: Finished difference. Result has 39 places, 35 transitions, 142 flow [2021-03-25 02:33:21,288 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=142, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2021-03-25 02:33:21,288 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, 11 predicate places. [2021-03-25 02:33:21,288 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 142 flow [2021-03-25 02:33:21,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 28.285714285714285) internal successors, (198), 7 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,289 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 02:33:21,289 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 02:33:21,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-25 02:33:21,289 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 02:33:21,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 02:33:21,290 INFO L82 PathProgramCache]: Analyzing trace with hash 667226891, now seen corresponding path program 4 times [2021-03-25 02:33:21,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 02:33:21,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055686316] [2021-03-25 02:33:21,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 02:33:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 02:33:21,300 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,300 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,300 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 02:33:21,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055686316] [2021-03-25 02:33:21,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 02:33:21,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 02:33:21,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629822290] [2021-03-25 02:33:21,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-25 02:33:21,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 02:33:21,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-25 02:33:21,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-25 02:33:21,306 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 45 [2021-03-25 02:33:21,306 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,306 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 02:33:21,306 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 45 [2021-03-25 02:33:21,306 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 02:33:21,317 INFO L129 PetriNetUnfolder]: 3/66 cut-off events. [2021-03-25 02:33:21,317 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2021-03-25 02:33:21,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 66 events. 3/66 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 217 event pairs, 0 based on Foata normal form. 1/66 useless extension candidates. Maximal degree in co-relation 76. Up to 9 conditions per place. [2021-03-25 02:33:21,318 INFO L132 encePairwiseOnDemand]: 42/45 looper letters, 2 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2021-03-25 02:33:21,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 139 flow [2021-03-25 02:33:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-25 02:33:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-25 02:33:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2021-03-25 02:33:21,319 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8592592592592593 [2021-03-25 02:33:21,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 116 transitions. [2021-03-25 02:33:21,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 116 transitions. [2021-03-25 02:33:21,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 02:33:21,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 116 transitions. [2021-03-25 02:33:21,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,321 INFO L185 Difference]: Start difference. First operand has 39 places, 35 transitions, 142 flow. Second operand 3 states and 116 transitions. [2021-03-25 02:33:21,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 32 transitions, 139 flow [2021-03-25 02:33:21,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 32 transitions, 135 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-03-25 02:33:21,323 INFO L241 Difference]: Finished difference. Result has 39 places, 32 transitions, 137 flow [2021-03-25 02:33:21,323 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2021-03-25 02:33:21,323 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, 11 predicate places. [2021-03-25 02:33:21,323 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 137 flow [2021-03-25 02:33:21,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,324 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 02:33:21,324 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 02:33:21,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-25 02:33:21,324 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 02:33:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 02:33:21,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2040477207, now seen corresponding path program 5 times [2021-03-25 02:33:21,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 02:33:21,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659090019] [2021-03-25 02:33:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 02:33:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 02:33:21,341 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,341 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,342 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,342 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,347 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,370 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,379 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,380 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,389 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 02:33:21,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659090019] [2021-03-25 02:33:21,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 02:33:21,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-25 02:33:21,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493159176] [2021-03-25 02:33:21,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-25 02:33:21,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 02:33:21,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-25 02:33:21,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-25 02:33:21,392 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 45 [2021-03-25 02:33:21,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 137 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 02:33:21,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 45 [2021-03-25 02:33:21,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 02:33:21,523 INFO L129 PetriNetUnfolder]: 21/151 cut-off events. [2021-03-25 02:33:21,523 INFO L130 PetriNetUnfolder]: For 97/101 co-relation queries the response was YES. [2021-03-25 02:33:21,524 INFO L84 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 151 events. 21/151 cut-off events. For 97/101 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 724 event pairs, 0 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 143. Up to 23 conditions per place. [2021-03-25 02:33:21,525 INFO L132 encePairwiseOnDemand]: 36/45 looper letters, 21 selfloop transitions, 17 changer transitions 2/54 dead transitions. [2021-03-25 02:33:21,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 319 flow [2021-03-25 02:33:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-25 02:33:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-25 02:33:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 274 transitions. [2021-03-25 02:33:21,526 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6765432098765433 [2021-03-25 02:33:21,527 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 274 transitions. [2021-03-25 02:33:21,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 274 transitions. [2021-03-25 02:33:21,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 02:33:21,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 274 transitions. [2021-03-25 02:33:21,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.444444444444443) internal successors, (274), 9 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,529 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,529 INFO L185 Difference]: Start difference. First operand has 39 places, 32 transitions, 137 flow. Second operand 9 states and 274 transitions. [2021-03-25 02:33:21,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 319 flow [2021-03-25 02:33:21,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 307 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-25 02:33:21,532 INFO L241 Difference]: Finished difference. Result has 50 places, 42 transitions, 249 flow [2021-03-25 02:33:21,532 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=249, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2021-03-25 02:33:21,532 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2021-03-25 02:33:21,532 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 249 flow [2021-03-25 02:33:21,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,533 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 02:33:21,533 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 02:33:21,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-25 02:33:21,533 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 02:33:21,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 02:33:21,533 INFO L82 PathProgramCache]: Analyzing trace with hash -139198127, now seen corresponding path program 6 times [2021-03-25 02:33:21,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 02:33:21,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602929619] [2021-03-25 02:33:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 02:33:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 02:33:21,549 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,550 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,550 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,551 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,555 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,556 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,561 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,562 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,570 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,571 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,578 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,587 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,587 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,597 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 02:33:21,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602929619] [2021-03-25 02:33:21,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 02:33:21,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-25 02:33:21,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449321195] [2021-03-25 02:33:21,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-25 02:33:21,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 02:33:21,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-25 02:33:21,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-25 02:33:21,605 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 45 [2021-03-25 02:33:21,605 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 249 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 02:33:21,606 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 45 [2021-03-25 02:33:21,606 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 02:33:21,715 INFO L129 PetriNetUnfolder]: 24/161 cut-off events. [2021-03-25 02:33:21,715 INFO L130 PetriNetUnfolder]: For 279/281 co-relation queries the response was YES. [2021-03-25 02:33:21,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 161 events. 24/161 cut-off events. For 279/281 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 803 event pairs, 7 based on Foata normal form. 3/163 useless extension candidates. Maximal degree in co-relation 215. Up to 25 conditions per place. [2021-03-25 02:33:21,717 INFO L132 encePairwiseOnDemand]: 36/45 looper letters, 23 selfloop transitions, 17 changer transitions 0/54 dead transitions. [2021-03-25 02:33:21,717 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 405 flow [2021-03-25 02:33:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-25 02:33:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-25 02:33:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 276 transitions. [2021-03-25 02:33:21,718 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2021-03-25 02:33:21,718 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 276 transitions. [2021-03-25 02:33:21,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 276 transitions. [2021-03-25 02:33:21,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 02:33:21,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 276 transitions. [2021-03-25 02:33:21,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.666666666666668) internal successors, (276), 9 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,720 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,720 INFO L185 Difference]: Start difference. First operand has 50 places, 42 transitions, 249 flow. Second operand 9 states and 276 transitions. [2021-03-25 02:33:21,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 405 flow [2021-03-25 02:33:21,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 395 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-25 02:33:21,724 INFO L241 Difference]: Finished difference. Result has 58 places, 48 transitions, 335 flow [2021-03-25 02:33:21,724 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=335, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2021-03-25 02:33:21,725 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, 30 predicate places. [2021-03-25 02:33:21,725 INFO L480 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 335 flow [2021-03-25 02:33:21,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,725 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 02:33:21,725 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 02:33:21,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-25 02:33:21,725 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 02:33:21,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 02:33:21,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1975573473, now seen corresponding path program 7 times [2021-03-25 02:33:21,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 02:33:21,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721601140] [2021-03-25 02:33:21,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 02:33:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 02:33:21,735 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,736 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,736 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,738 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,738 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 02:33:21,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721601140] [2021-03-25 02:33:21,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 02:33:21,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 02:33:21,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000177369] [2021-03-25 02:33:21,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-25 02:33:21,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 02:33:21,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-25 02:33:21,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-25 02:33:21,740 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 45 [2021-03-25 02:33:21,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 335 flow. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 02:33:21,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 45 [2021-03-25 02:33:21,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 02:33:21,752 INFO L129 PetriNetUnfolder]: 13/128 cut-off events. [2021-03-25 02:33:21,753 INFO L130 PetriNetUnfolder]: For 202/203 co-relation queries the response was YES. [2021-03-25 02:33:21,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 128 events. 13/128 cut-off events. For 202/203 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 631 event pairs, 1 based on Foata normal form. 4/132 useless extension candidates. Maximal degree in co-relation 244. Up to 18 conditions per place. [2021-03-25 02:33:21,754 INFO L132 encePairwiseOnDemand]: 42/45 looper letters, 2 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2021-03-25 02:33:21,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 47 transitions, 344 flow [2021-03-25 02:33:21,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-25 02:33:21,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-25 02:33:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2021-03-25 02:33:21,755 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.837037037037037 [2021-03-25 02:33:21,755 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 113 transitions. [2021-03-25 02:33:21,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 113 transitions. [2021-03-25 02:33:21,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 02:33:21,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 113 transitions. [2021-03-25 02:33:21,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,756 INFO L185 Difference]: Start difference. First operand has 58 places, 48 transitions, 335 flow. Second operand 3 states and 113 transitions. [2021-03-25 02:33:21,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 47 transitions, 344 flow [2021-03-25 02:33:21,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 320 flow, removed 5 selfloop flow, removed 3 redundant places. [2021-03-25 02:33:21,759 INFO L241 Difference]: Finished difference. Result has 58 places, 47 transitions, 326 flow [2021-03-25 02:33:21,760 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=326, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2021-03-25 02:33:21,760 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, 30 predicate places. [2021-03-25 02:33:21,760 INFO L480 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 326 flow [2021-03-25 02:33:21,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,760 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 02:33:21,760 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 02:33:21,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-25 02:33:21,760 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 02:33:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 02:33:21,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1949021087, now seen corresponding path program 8 times [2021-03-25 02:33:21,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 02:33:21,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118661986] [2021-03-25 02:33:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 02:33:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 02:33:21,773 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,773 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,774 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,774 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,778 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,779 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,784 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,790 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,790 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,805 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-03-25 02:33:21,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,813 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,814 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 02:33:21,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118661986] [2021-03-25 02:33:21,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 02:33:21,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-25 02:33:21,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140710939] [2021-03-25 02:33:21,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-25 02:33:21,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 02:33:21,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-25 02:33:21,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-25 02:33:21,816 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 45 [2021-03-25 02:33:21,816 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 326 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,816 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 02:33:21,816 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 45 [2021-03-25 02:33:21,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 02:33:21,931 INFO L129 PetriNetUnfolder]: 16/136 cut-off events. [2021-03-25 02:33:21,931 INFO L130 PetriNetUnfolder]: For 328/332 co-relation queries the response was YES. [2021-03-25 02:33:21,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 136 events. 16/136 cut-off events. For 328/332 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 635 event pairs, 7 based on Foata normal form. 3/139 useless extension candidates. Maximal degree in co-relation 329. Up to 22 conditions per place. [2021-03-25 02:33:21,932 INFO L132 encePairwiseOnDemand]: 37/45 looper letters, 21 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2021-03-25 02:33:21,932 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 50 transitions, 415 flow [2021-03-25 02:33:21,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-25 02:33:21,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-25 02:33:21,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 273 transitions. [2021-03-25 02:33:21,934 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2021-03-25 02:33:21,934 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 273 transitions. [2021-03-25 02:33:21,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 273 transitions. [2021-03-25 02:33:21,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 02:33:21,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 273 transitions. [2021-03-25 02:33:21,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.333333333333332) internal successors, (273), 9 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,936 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,936 INFO L185 Difference]: Start difference. First operand has 58 places, 47 transitions, 326 flow. Second operand 9 states and 273 transitions. [2021-03-25 02:33:21,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 50 transitions, 415 flow [2021-03-25 02:33:21,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 50 transitions, 395 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-25 02:33:21,939 INFO L241 Difference]: Finished difference. Result has 65 places, 42 transitions, 287 flow [2021-03-25 02:33:21,939 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=287, PETRI_PLACES=65, PETRI_TRANSITIONS=42} [2021-03-25 02:33:21,939 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, 37 predicate places. [2021-03-25 02:33:21,939 INFO L480 AbstractCegarLoop]: Abstraction has has 65 places, 42 transitions, 287 flow [2021-03-25 02:33:21,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,940 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 02:33:21,940 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 02:33:21,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-25 02:33:21,940 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 02:33:21,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 02:33:21,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1560209723, now seen corresponding path program 9 times [2021-03-25 02:33:21,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 02:33:21,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575495335] [2021-03-25 02:33:21,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 02:33:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 02:33:21,952 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,953 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,953 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,954 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,957 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,958 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,968 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,970 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,977 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:21,985 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,985 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 02:33:21,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:21,994 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 02:33:21,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575495335] [2021-03-25 02:33:21,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 02:33:21,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-25 02:33:21,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068634561] [2021-03-25 02:33:21,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-25 02:33:21,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 02:33:21,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-25 02:33:21,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-25 02:33:21,996 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 45 [2021-03-25 02:33:21,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 42 transitions, 287 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:21,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 02:33:21,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 45 [2021-03-25 02:33:21,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 02:33:22,095 INFO L129 PetriNetUnfolder]: 15/127 cut-off events. [2021-03-25 02:33:22,096 INFO L130 PetriNetUnfolder]: For 315/315 co-relation queries the response was YES. [2021-03-25 02:33:22,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 127 events. 15/127 cut-off events. For 315/315 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 574 event pairs, 6 based on Foata normal form. 1/128 useless extension candidates. Maximal degree in co-relation 336. Up to 22 conditions per place. [2021-03-25 02:33:22,097 INFO L132 encePairwiseOnDemand]: 36/45 looper letters, 18 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2021-03-25 02:33:22,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 47 transitions, 386 flow [2021-03-25 02:33:22,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-25 02:33:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-25 02:33:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 271 transitions. [2021-03-25 02:33:22,098 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6691358024691358 [2021-03-25 02:33:22,098 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 271 transitions. [2021-03-25 02:33:22,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 271 transitions. [2021-03-25 02:33:22,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 02:33:22,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 271 transitions. [2021-03-25 02:33:22,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.11111111111111) internal successors, (271), 9 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,100 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,100 INFO L185 Difference]: Start difference. First operand has 65 places, 42 transitions, 287 flow. Second operand 9 states and 271 transitions. [2021-03-25 02:33:22,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 47 transitions, 386 flow [2021-03-25 02:33:22,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 47 transitions, 358 flow, removed 2 selfloop flow, removed 8 redundant places. [2021-03-25 02:33:22,103 INFO L241 Difference]: Finished difference. Result has 63 places, 45 transitions, 325 flow [2021-03-25 02:33:22,103 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=325, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2021-03-25 02:33:22,104 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, 35 predicate places. [2021-03-25 02:33:22,104 INFO L480 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 325 flow [2021-03-25 02:33:22,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,104 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 02:33:22,104 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 02:33:22,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-25 02:33:22,104 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 02:33:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 02:33:22,105 INFO L82 PathProgramCache]: Analyzing trace with hash -285446819, now seen corresponding path program 10 times [2021-03-25 02:33:22,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 02:33:22,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603095676] [2021-03-25 02:33:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 02:33:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 02:33:22,115 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,116 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:22,116 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,116 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,120 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,121 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,125 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,131 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,132 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,146 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,154 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-03-25 02:33:22,156 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 02:33:22,164 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,165 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 02:33:22,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603095676] [2021-03-25 02:33:22,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 02:33:22,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-25 02:33:22,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339654628] [2021-03-25 02:33:22,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-25 02:33:22,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 02:33:22,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-25 02:33:22,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-25 02:33:22,168 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 45 [2021-03-25 02:33:22,168 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 325 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 02:33:22,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 45 [2021-03-25 02:33:22,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 02:33:22,300 INFO L129 PetriNetUnfolder]: 13/105 cut-off events. [2021-03-25 02:33:22,301 INFO L130 PetriNetUnfolder]: For 279/283 co-relation queries the response was YES. [2021-03-25 02:33:22,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 105 events. 13/105 cut-off events. For 279/283 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 414 event pairs, 6 based on Foata normal form. 2/107 useless extension candidates. Maximal degree in co-relation 325. Up to 22 conditions per place. [2021-03-25 02:33:22,301 INFO L132 encePairwiseOnDemand]: 38/45 looper letters, 16 selfloop transitions, 7 changer transitions 6/43 dead transitions. [2021-03-25 02:33:22,302 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 43 transitions, 355 flow [2021-03-25 02:33:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-25 02:33:22,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-25 02:33:22,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 267 transitions. [2021-03-25 02:33:22,303 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2021-03-25 02:33:22,303 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 267 transitions. [2021-03-25 02:33:22,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 267 transitions. [2021-03-25 02:33:22,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 02:33:22,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 267 transitions. [2021-03-25 02:33:22,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 29.666666666666668) internal successors, (267), 9 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,305 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,305 INFO L185 Difference]: Start difference. First operand has 63 places, 45 transitions, 325 flow. Second operand 9 states and 267 transitions. [2021-03-25 02:33:22,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 43 transitions, 355 flow [2021-03-25 02:33:22,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 43 transitions, 326 flow, removed 3 selfloop flow, removed 7 redundant places. [2021-03-25 02:33:22,308 INFO L241 Difference]: Finished difference. Result has 64 places, 35 transitions, 215 flow [2021-03-25 02:33:22,308 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=215, PETRI_PLACES=64, PETRI_TRANSITIONS=35} [2021-03-25 02:33:22,308 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, 36 predicate places. [2021-03-25 02:33:22,308 INFO L480 AbstractCegarLoop]: Abstraction has has 64 places, 35 transitions, 215 flow [2021-03-25 02:33:22,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,308 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 02:33:22,308 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 02:33:22,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-25 02:33:22,309 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 02:33:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 02:33:22,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1581976761, now seen corresponding path program 11 times [2021-03-25 02:33:22,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 02:33:22,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936225839] [2021-03-25 02:33:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 02:33:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 02:33:22,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:22,319 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,323 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,334 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,334 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,340 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,341 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,347 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-03-25 02:33:22,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,356 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,356 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 02:33:22,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936225839] [2021-03-25 02:33:22,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 02:33:22,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-25 02:33:22,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765111943] [2021-03-25 02:33:22,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-25 02:33:22,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 02:33:22,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-25 02:33:22,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-25 02:33:22,358 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 45 [2021-03-25 02:33:22,358 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 35 transitions, 215 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 02:33:22,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 45 [2021-03-25 02:33:22,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 02:33:22,477 INFO L129 PetriNetUnfolder]: 9/85 cut-off events. [2021-03-25 02:33:22,477 INFO L130 PetriNetUnfolder]: For 201/201 co-relation queries the response was YES. [2021-03-25 02:33:22,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 85 events. 9/85 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 297 event pairs, 2 based on Foata normal form. 1/86 useless extension candidates. Maximal degree in co-relation 260. Up to 18 conditions per place. [2021-03-25 02:33:22,478 INFO L132 encePairwiseOnDemand]: 37/45 looper letters, 11 selfloop transitions, 8 changer transitions 4/37 dead transitions. [2021-03-25 02:33:22,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 37 transitions, 270 flow [2021-03-25 02:33:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-25 02:33:22,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-25 02:33:22,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2021-03-25 02:33:22,483 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2021-03-25 02:33:22,483 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 233 transitions. [2021-03-25 02:33:22,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 233 transitions. [2021-03-25 02:33:22,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 02:33:22,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 233 transitions. [2021-03-25 02:33:22,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 29.125) internal successors, (233), 8 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,485 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,485 INFO L185 Difference]: Start difference. First operand has 64 places, 35 transitions, 215 flow. Second operand 8 states and 233 transitions. [2021-03-25 02:33:22,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 37 transitions, 270 flow [2021-03-25 02:33:22,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 37 transitions, 217 flow, removed 6 selfloop flow, removed 11 redundant places. [2021-03-25 02:33:22,487 INFO L241 Difference]: Finished difference. Result has 52 places, 30 transitions, 146 flow [2021-03-25 02:33:22,487 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=146, PETRI_PLACES=52, PETRI_TRANSITIONS=30} [2021-03-25 02:33:22,487 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, 24 predicate places. [2021-03-25 02:33:22,487 INFO L480 AbstractCegarLoop]: Abstraction has has 52 places, 30 transitions, 146 flow [2021-03-25 02:33:22,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,488 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 02:33:22,488 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 02:33:22,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-25 02:33:22,494 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 02:33:22,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 02:33:22,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1192311729, now seen corresponding path program 12 times [2021-03-25 02:33:22,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 02:33:22,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106300740] [2021-03-25 02:33:22,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 02:33:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 02:33:22,512 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,512 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:22,513 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,517 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,518 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,523 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,523 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,529 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,529 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,535 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,543 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,543 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 02:33:22,552 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,553 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 02:33:22,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106300740] [2021-03-25 02:33:22,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 02:33:22,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-25 02:33:22,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581381327] [2021-03-25 02:33:22,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-25 02:33:22,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 02:33:22,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-25 02:33:22,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-25 02:33:22,558 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 45 [2021-03-25 02:33:22,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 30 transitions, 146 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 02:33:22,559 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 45 [2021-03-25 02:33:22,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 02:33:22,647 INFO L129 PetriNetUnfolder]: 8/78 cut-off events. [2021-03-25 02:33:22,647 INFO L130 PetriNetUnfolder]: For 122/124 co-relation queries the response was YES. [2021-03-25 02:33:22,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 78 events. 8/78 cut-off events. For 122/124 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 250 event pairs, 3 based on Foata normal form. 1/79 useless extension candidates. Maximal degree in co-relation 214. Up to 27 conditions per place. [2021-03-25 02:33:22,649 INFO L132 encePairwiseOnDemand]: 36/45 looper letters, 9 selfloop transitions, 10 changer transitions 0/33 dead transitions. [2021-03-25 02:33:22,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 33 transitions, 204 flow [2021-03-25 02:33:22,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-25 02:33:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-25 02:33:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2021-03-25 02:33:22,652 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.65 [2021-03-25 02:33:22,652 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 234 transitions. [2021-03-25 02:33:22,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 234 transitions. [2021-03-25 02:33:22,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 02:33:22,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 234 transitions. [2021-03-25 02:33:22,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 29.25) internal successors, (234), 8 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,656 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,656 INFO L185 Difference]: Start difference. First operand has 52 places, 30 transitions, 146 flow. Second operand 8 states and 234 transitions. [2021-03-25 02:33:22,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 33 transitions, 204 flow [2021-03-25 02:33:22,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 33 transitions, 162 flow, removed 8 selfloop flow, removed 10 redundant places. [2021-03-25 02:33:22,659 INFO L241 Difference]: Finished difference. Result has 47 places, 32 transitions, 153 flow [2021-03-25 02:33:22,659 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=153, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2021-03-25 02:33:22,659 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2021-03-25 02:33:22,659 INFO L480 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 153 flow [2021-03-25 02:33:22,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,660 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 02:33:22,660 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 02:33:22,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-25 02:33:22,660 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 02:33:22,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 02:33:22,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2079340751, now seen corresponding path program 13 times [2021-03-25 02:33:22,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 02:33:22,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427998469] [2021-03-25 02:33:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 02:33:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 02:33:22,722 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,723 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:22,724 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,732 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,737 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,737 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,743 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,750 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,750 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,757 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,758 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,767 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-03-25 02:33:22,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 02:33:22,776 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,777 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 02:33:22,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427998469] [2021-03-25 02:33:22,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 02:33:22,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-25 02:33:22,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081053196] [2021-03-25 02:33:22,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-25 02:33:22,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 02:33:22,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-25 02:33:22,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-25 02:33:22,782 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 45 [2021-03-25 02:33:22,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 153 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 02:33:22,782 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 45 [2021-03-25 02:33:22,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 02:33:22,875 INFO L129 PetriNetUnfolder]: 6/53 cut-off events. [2021-03-25 02:33:22,875 INFO L130 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2021-03-25 02:33:22,875 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 53 events. 6/53 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 121 event pairs, 3 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 134. Up to 20 conditions per place. [2021-03-25 02:33:22,876 INFO L132 encePairwiseOnDemand]: 38/45 looper letters, 7 selfloop transitions, 3 changer transitions 5/29 dead transitions. [2021-03-25 02:33:22,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 29 transitions, 159 flow [2021-03-25 02:33:22,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-25 02:33:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-25 02:33:22,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2021-03-25 02:33:22,877 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2021-03-25 02:33:22,877 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 231 transitions. [2021-03-25 02:33:22,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 231 transitions. [2021-03-25 02:33:22,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 02:33:22,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 231 transitions. [2021-03-25 02:33:22,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,881 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,881 INFO L185 Difference]: Start difference. First operand has 47 places, 32 transitions, 153 flow. Second operand 8 states and 231 transitions. [2021-03-25 02:33:22,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 29 transitions, 159 flow [2021-03-25 02:33:22,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 29 transitions, 145 flow, removed 1 selfloop flow, removed 6 redundant places. [2021-03-25 02:33:22,882 INFO L241 Difference]: Finished difference. Result has 48 places, 23 transitions, 86 flow [2021-03-25 02:33:22,882 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=86, PETRI_PLACES=48, PETRI_TRANSITIONS=23} [2021-03-25 02:33:22,882 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, 20 predicate places. [2021-03-25 02:33:22,883 INFO L480 AbstractCegarLoop]: Abstraction has has 48 places, 23 transitions, 86 flow [2021-03-25 02:33:22,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,883 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 02:33:22,883 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 02:33:22,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-25 02:33:22,883 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 02:33:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 02:33:22,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1301525925, now seen corresponding path program 14 times [2021-03-25 02:33:22,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 02:33:22,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009782750] [2021-03-25 02:33:22,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 02:33:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 02:33:22,912 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:22,913 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 02:33:22,915 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,916 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 02:33:22,919 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 02:33:22,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 02:33:22,934 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,938 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 02:33:22,945 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 02:33:22,945 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 02:33:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 02:33:22,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009782750] [2021-03-25 02:33:22,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 02:33:22,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-25 02:33:22,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548402525] [2021-03-25 02:33:22,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 02:33:22,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 02:33:22,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 02:33:22,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-25 02:33:22,947 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 45 [2021-03-25 02:33:22,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 23 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 28.285714285714285) internal successors, (198), 7 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,948 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 02:33:22,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 45 [2021-03-25 02:33:22,948 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 02:33:22,988 INFO L129 PetriNetUnfolder]: 3/20 cut-off events. [2021-03-25 02:33:22,989 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2021-03-25 02:33:22,989 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 20 events. 3/20 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 1 based on Foata normal form. 2/22 useless extension candidates. Maximal degree in co-relation 56. Up to 6 conditions per place. [2021-03-25 02:33:22,989 INFO L132 encePairwiseOnDemand]: 39/45 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2021-03-25 02:33:22,989 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 14 transitions, 72 flow [2021-03-25 02:33:22,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-25 02:33:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-25 02:33:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2021-03-25 02:33:22,990 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2021-03-25 02:33:22,990 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 198 transitions. [2021-03-25 02:33:22,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 198 transitions. [2021-03-25 02:33:22,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 02:33:22,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 198 transitions. [2021-03-25 02:33:22,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 28.285714285714285) internal successors, (198), 7 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 45.0) internal successors, (360), 8 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,992 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 45.0) internal successors, (360), 8 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,992 INFO L185 Difference]: Start difference. First operand has 48 places, 23 transitions, 86 flow. Second operand 7 states and 198 transitions. [2021-03-25 02:33:22,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 14 transitions, 72 flow [2021-03-25 02:33:22,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 14 transitions, 55 flow, removed 4 selfloop flow, removed 6 redundant places. [2021-03-25 02:33:22,993 INFO L241 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2021-03-25 02:33:22,993 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=35, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2021-03-25 02:33:22,994 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2021-03-25 02:33:22,994 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2021-03-25 02:33:22,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 28.285714285714285) internal successors, (198), 7 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 02:33:22,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-25 02:33:22,999 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 02:33:22 BasicIcfg [2021-03-25 02:33:22,999 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 02:33:23,001 INFO L168 Benchmark]: Toolchain (without parser) took 3288.17 ms. Allocated memory was 333.4 MB in the beginning and 400.6 MB in the end (delta: 67.1 MB). Free memory was 313.7 MB in the beginning and 333.7 MB in the end (delta: -20.0 MB). Peak memory consumption was 47.5 MB. Max. memory is 16.0 GB. [2021-03-25 02:33:23,002 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 333.4 MB. Free memory was 314.8 MB in the beginning and 314.7 MB in the end (delta: 69.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 02:33:23,002 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.00 ms. Allocated memory is still 333.4 MB. Free memory was 313.6 MB in the beginning and 312.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-25 02:33:23,002 INFO L168 Benchmark]: Boogie Preprocessor took 14.02 ms. Allocated memory is still 333.4 MB. Free memory was 312.2 MB in the beginning and 311.3 MB in the end (delta: 906.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 02:33:23,002 INFO L168 Benchmark]: RCFGBuilder took 218.30 ms. Allocated memory is still 333.4 MB. Free memory was 311.2 MB in the beginning and 299.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-03-25 02:33:23,003 INFO L168 Benchmark]: TraceAbstraction took 3025.73 ms. Allocated memory was 333.4 MB in the beginning and 400.6 MB in the end (delta: 67.1 MB). Free memory was 299.3 MB in the beginning and 333.7 MB in the end (delta: -34.3 MB). Peak memory consumption was 32.8 MB. Max. memory is 16.0 GB. [2021-03-25 02:33:23,012 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 0.12 ms. Allocated memory is still 333.4 MB. Free memory was 314.8 MB in the beginning and 314.7 MB in the end (delta: 69.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.00 ms. Allocated memory is still 333.4 MB. Free memory was 313.6 MB in the beginning and 312.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.02 ms. Allocated memory is still 333.4 MB. Free memory was 312.2 MB in the beginning and 311.3 MB in the end (delta: 906.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 218.30 ms. Allocated memory is still 333.4 MB. Free memory was 311.2 MB in the beginning and 299.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3025.73 ms. Allocated memory was 333.4 MB in the beginning and 400.6 MB in the end (delta: 67.1 MB). Free memory was 299.3 MB in the beginning and 333.7 MB in the end (delta: -34.3 MB). Peak memory consumption was 32.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 459.4ms, 38 PlacesBefore, 28 PlacesAfterwards, 31 TransitionsBefore, 21 TransitionsAfterwards, 240 CoEnabledTransitionPairs, 3 FixpointIterations, 4 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 10 TotalNumberOfCompositions, 758 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 409, positive: 333, positive conditional: 0, positive unconditional: 333, negative: 76, negative conditional: 0, negative unconditional: 76, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 211, positive: 176, positive conditional: 0, positive unconditional: 176, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 211, positive: 176, positive conditional: 0, positive unconditional: 176, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 211, positive: 169, positive conditional: 0, positive unconditional: 169, negative: 42, negative conditional: 0, negative unconditional: 42, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 42, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 231, positive: 38, positive conditional: 0, positive unconditional: 38, negative: 194, negative conditional: 0, negative unconditional: 194, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 409, positive: 157, positive conditional: 0, positive unconditional: 157, negative: 41, negative conditional: 0, negative unconditional: 41, unknown: 211, unknown conditional: 0, unknown unconditional: 211] , Statistics on independence cache: Total cache size (in pairs): 99, Positive cache size: 79, Positive conditional cache size: 0, Positive unconditional cache size: 79, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20 - PositiveResult [Line: 60]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 8.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2952.0ms, OverallIterations: 14, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1378.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 547.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 71 SDtfs, 233 SDslu, 79 SDs, 0 SdLazy, 568 SolverSat, 125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 298.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1006.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=335occurred in iteration=6, InterpolantAutomatonStates: 107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 19.7ms SsaConstructionTime, 75.2ms SatisfiabilityAnalysisTime, 762.3ms InterpolantComputationTime, 294 NumberOfCodeBlocks, 294 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 280 ConstructedInterpolants, 0 QuantifiedInterpolants, 1102 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...