/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 04:27:12,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 04:27:12,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 04:27:12,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 04:27:12,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 04:27:12,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 04:27:12,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 04:27:12,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 04:27:12,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 04:27:12,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 04:27:12,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 04:27:12,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-03-11 04:27:12,689 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-03-11 04:27:12,718 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 04:27:12,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 04:27:12,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 04:27:12,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 04:27:12,721 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 04:27:12,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 04:27:12,721 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 04:27:12,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 04:27:12,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 04:27:12,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 04:27:12,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 04:27:12,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 04:27:12,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 04:27:12,722 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 04:27:12,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 04:27:12,722 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 04:27:12,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 04:27:12,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 04:27:12,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 04:27:12,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 04:27:12,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 04:27:12,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 04:27:12,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 04:27:12,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 04:27:12,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 04:27:12,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 04:27:12,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 04:27:12,723 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 04:27:12,723 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 04:27:12,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 04:27:12,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 04:27:12,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 04:27:12,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 04:27:12,982 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 04:27:12,982 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 04:27:12,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl [2021-03-11 04:27:12,983 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl' [2021-03-11 04:27:13,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 04:27:13,012 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 04:27:13,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 04:27:13,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 04:27:13,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 04:27:13,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:27:13" (1/1) ... [2021-03-11 04:27:13,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:27:13" (1/1) ... [2021-03-11 04:27:13,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 04:27:13,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 04:27:13,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 04:27:13,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 04:27:13,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:27:13" (1/1) ... [2021-03-11 04:27:13,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:27:13" (1/1) ... [2021-03-11 04:27:13,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:27:13" (1/1) ... [2021-03-11 04:27:13,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:27:13" (1/1) ... [2021-03-11 04:27:13,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:27:13" (1/1) ... [2021-03-11 04:27:13,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:27:13" (1/1) ... [2021-03-11 04:27:13,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:27:13" (1/1) ... [2021-03-11 04:27:13,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 04:27:13,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 04:27:13,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 04:27:13,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 04:27:13,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:27:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 04:27:13,097 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 04:27:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 04:27:13,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 04:27:13,097 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-03-11 04:27:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-03-11 04:27:13,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-03-11 04:27:13,098 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 04:27:13,186 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 04:27:13,186 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-03-11 04:27:13,187 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:27:13 BoogieIcfgContainer [2021-03-11 04:27:13,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 04:27:13,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 04:27:13,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 04:27:13,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 04:27:13,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:27:13" (1/2) ... [2021-03-11 04:27:13,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b96a466 and model type fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 04:27:13, skipping insertion in model container [2021-03-11 04:27:13,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:27:13" (2/2) ... [2021-03-11 04:27:13,193 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_unsafe.bpl [2021-03-11 04:27:13,199 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 04:27:13,201 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 04:27:13,202 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 04:27:13,213 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,213 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,213 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,214 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,218 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 04:27:13,229 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 04:27:13,241 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:27:13,241 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:27:13,241 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:27:13,241 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:27:13,242 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:27:13,242 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:27:13,242 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:27:13,242 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:27:13,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 10 transitions, 25 flow [2021-03-11 04:27:13,264 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-11 04:27:13,264 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:27:13,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16 conditions, 11 events. 0/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 11 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 04:27:13,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 13 places, 10 transitions, 25 flow [2021-03-11 04:27:13,267 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 13 places, 10 transitions, 25 flow [2021-03-11 04:27:13,269 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-03-11 04:27:13,270 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:27:13,270 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:13,270 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 04:27:13,270 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-11 04:27:13,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:13,273 INFO L82 PathProgramCache]: Analyzing trace with hash 43134229, now seen corresponding path program 1 times [2021-03-11 04:27:13,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:13,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769143918] [2021-03-11 04:27:13,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:13,352 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:13,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,360 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:13,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:13,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:27:13,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769143918] [2021-03-11 04:27:13,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:27:13,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 04:27:13,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237484826] [2021-03-11 04:27:13,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:27:13,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:13,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:27:13,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:27:13,410 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 10 [2021-03-11 04:27:13,412 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 10 transitions, 25 flow. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:13,412 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:13,412 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 10 [2021-03-11 04:27:13,413 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:13,479 INFO L129 PetriNetUnfolder]: 2/15 cut-off events. [2021-03-11 04:27:13,479 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:27:13,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 15 events. 2/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 22 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 17. Up to 6 conditions per place. [2021-03-11 04:27:13,481 INFO L132 encePairwiseOnDemand]: 5/10 looper letters, 3 selfloop transitions, 4 changer transitions 1/10 dead transitions. [2021-03-11 04:27:13,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 10 transitions, 39 flow [2021-03-11 04:27:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:27:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:27:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 26 transitions. [2021-03-11 04:27:13,488 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2021-03-11 04:27:13,488 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 26 transitions. [2021-03-11 04:27:13,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 26 transitions. [2021-03-11 04:27:13,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:13,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 26 transitions. [2021-03-11 04:27:13,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:13,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:13,494 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:13,512 INFO L185 Difference]: Start difference. First operand has 13 places, 10 transitions, 25 flow. Second operand 6 states and 26 transitions. [2021-03-11 04:27:13,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 10 transitions, 39 flow [2021-03-11 04:27:13,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 10 transitions, 39 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 04:27:13,515 INFO L241 Difference]: Finished difference. Result has 17 places, 8 transitions, 29 flow [2021-03-11 04:27:13,516 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=10, PETRI_DIFFERENCE_MINUEND_FLOW=23, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=29, PETRI_PLACES=17, PETRI_TRANSITIONS=8} [2021-03-11 04:27:13,516 INFO L335 CegarLoopForPetriNet]: 13 programPoint places, 4 predicate places. [2021-03-11 04:27:13,517 INFO L480 AbstractCegarLoop]: Abstraction has has 17 places, 8 transitions, 29 flow [2021-03-11 04:27:13,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:13,517 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:13,517 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 04:27:13,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 04:27:13,517 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-11 04:27:13,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:13,518 INFO L82 PathProgramCache]: Analyzing trace with hash 43134170, now seen corresponding path program 1 times [2021-03-11 04:27:13,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:13,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129337463] [2021-03-11 04:27:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:27:13,522 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:27:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:27:13,524 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:27:13,549 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 04:27:13,549 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 04:27:13,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 04:27:13,550 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 04:27:13,551 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-03-11 04:27:13,573 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,573 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,573 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,573 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,574 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,574 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,574 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,574 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,580 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 04:27:13,581 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 04:27:13,582 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:27:13,583 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:27:13,583 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:27:13,583 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:27:13,583 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:27:13,583 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:27:13,583 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:27:13,583 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:27:13,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-03-11 04:27:13,587 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-03-11 04:27:13,587 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 04:27:13,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 18 events. 0/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 29 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-11 04:27:13,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 15 transitions, 42 flow [2021-03-11 04:27:13,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2021-03-11 04:27:13,590 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-03-11 04:27:13,590 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-11 04:27:13,590 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:13,590 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 04:27:13,590 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:13,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:13,591 INFO L82 PathProgramCache]: Analyzing trace with hash 57452648, now seen corresponding path program 1 times [2021-03-11 04:27:13,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:13,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277672654] [2021-03-11 04:27:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:13,601 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,601 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:13,604 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:13,609 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,609 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:13,614 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,615 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:27:13,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277672654] [2021-03-11 04:27:13,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:27:13,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 04:27:13,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498733936] [2021-03-11 04:27:13,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:27:13,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:13,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:27:13,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:27:13,623 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 15 [2021-03-11 04:27:13,623 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:13,623 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:13,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 15 [2021-03-11 04:27:13,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:13,692 INFO L129 PetriNetUnfolder]: 34/88 cut-off events. [2021-03-11 04:27:13,692 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-03-11 04:27:13,693 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 88 events. 34/88 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 279 event pairs, 4 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 129. Up to 44 conditions per place. [2021-03-11 04:27:13,694 INFO L132 encePairwiseOnDemand]: 9/15 looper letters, 12 selfloop transitions, 7 changer transitions 0/23 dead transitions. [2021-03-11 04:27:13,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 101 flow [2021-03-11 04:27:13,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:27:13,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:27:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 44 transitions. [2021-03-11 04:27:13,698 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2021-03-11 04:27:13,698 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 44 transitions. [2021-03-11 04:27:13,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 44 transitions. [2021-03-11 04:27:13,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:13,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 44 transitions. [2021-03-11 04:27:13,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:13,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:13,701 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:13,702 INFO L185 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 6 states and 44 transitions. [2021-03-11 04:27:13,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 101 flow [2021-03-11 04:27:13,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 99 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-03-11 04:27:13,704 INFO L241 Difference]: Finished difference. Result has 26 places, 17 transitions, 64 flow [2021-03-11 04:27:13,704 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=64, PETRI_PLACES=26, PETRI_TRANSITIONS=17} [2021-03-11 04:27:13,705 INFO L335 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2021-03-11 04:27:13,705 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 17 transitions, 64 flow [2021-03-11 04:27:13,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:13,705 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:13,705 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2021-03-11 04:27:13,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 04:27:13,705 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:13,706 INFO L82 PathProgramCache]: Analyzing trace with hash -622629923, now seen corresponding path program 1 times [2021-03-11 04:27:13,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:13,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019439234] [2021-03-11 04:27:13,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:27:13,727 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:27:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:27:13,742 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:27:13,743 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 04:27:13,744 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 04:27:13,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 04:27:13,744 WARN L342 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 04:27:13,745 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-03-11 04:27:13,751 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,751 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,751 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,751 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,752 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,752 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,752 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,752 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,752 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,752 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,752 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,753 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:13,759 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 04:27:13,760 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-11 04:27:13,761 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:27:13,761 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:27:13,761 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:27:13,761 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:27:13,761 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:27:13,761 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:27:13,761 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:27:13,761 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:27:13,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 20 transitions, 61 flow [2021-03-11 04:27:13,765 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-03-11 04:27:13,766 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-11 04:27:13,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 25 events. 0/25 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-11 04:27:13,766 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 20 transitions, 61 flow [2021-03-11 04:27:13,766 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 20 transitions, 61 flow [2021-03-11 04:27:13,767 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-03-11 04:27:13,767 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-11 04:27:13,768 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:13,768 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 04:27:13,768 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:13,768 INFO L82 PathProgramCache]: Analyzing trace with hash 76542848, now seen corresponding path program 1 times [2021-03-11 04:27:13,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:13,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666226594] [2021-03-11 04:27:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:13,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,793 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:13,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,798 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:13,802 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,803 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:13,811 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,811 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:27:13,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666226594] [2021-03-11 04:27:13,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:27:13,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 04:27:13,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104925971] [2021-03-11 04:27:13,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:27:13,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:13,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:27:13,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:27:13,822 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-03-11 04:27:13,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 61 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:13,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:13,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-03-11 04:27:13,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:13,941 INFO L129 PetriNetUnfolder]: 268/491 cut-off events. [2021-03-11 04:27:13,941 INFO L130 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2021-03-11 04:27:13,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1002 conditions, 491 events. 268/491 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2139 event pairs, 66 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 733. Up to 373 conditions per place. [2021-03-11 04:27:13,947 INFO L132 encePairwiseOnDemand]: 13/20 looper letters, 22 selfloop transitions, 9 changer transitions 0/36 dead transitions. [2021-03-11 04:27:13,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 174 flow [2021-03-11 04:27:13,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:27:13,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:27:13,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2021-03-11 04:27:13,948 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2021-03-11 04:27:13,949 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 62 transitions. [2021-03-11 04:27:13,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 62 transitions. [2021-03-11 04:27:13,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:13,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 62 transitions. [2021-03-11 04:27:13,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:13,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:13,950 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:13,950 INFO L185 Difference]: Start difference. First operand has 27 places, 20 transitions, 61 flow. Second operand 6 states and 62 transitions. [2021-03-11 04:27:13,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 174 flow [2021-03-11 04:27:13,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 164 flow, removed 5 selfloop flow, removed 0 redundant places. [2021-03-11 04:27:13,952 INFO L241 Difference]: Finished difference. Result has 33 places, 26 transitions, 99 flow [2021-03-11 04:27:13,952 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=99, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2021-03-11 04:27:13,952 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2021-03-11 04:27:13,952 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 99 flow [2021-03-11 04:27:13,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:13,952 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:13,952 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:27:13,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 04:27:13,953 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:13,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:13,953 INFO L82 PathProgramCache]: Analyzing trace with hash 542941744, now seen corresponding path program 1 times [2021-03-11 04:27:13,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:13,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020594553] [2021-03-11 04:27:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:13,974 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:13,978 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:13,982 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:13,987 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,987 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:13,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:13,993 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:27:13,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020594553] [2021-03-11 04:27:13,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:27:13,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:27:13,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664893558] [2021-03-11 04:27:14,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 04:27:14,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:14,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 04:27:14,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-11 04:27:14,002 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-03-11 04:27:14,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 99 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:14,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:14,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-03-11 04:27:14,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:14,245 INFO L129 PetriNetUnfolder]: 475/966 cut-off events. [2021-03-11 04:27:14,245 INFO L130 PetriNetUnfolder]: For 321/321 co-relation queries the response was YES. [2021-03-11 04:27:14,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2268 conditions, 966 events. 475/966 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5840 event pairs, 187 based on Foata normal form. 0/840 useless extension candidates. Maximal degree in co-relation 2119. Up to 450 conditions per place. [2021-03-11 04:27:14,253 INFO L132 encePairwiseOnDemand]: 12/20 looper letters, 41 selfloop transitions, 24 changer transitions 0/70 dead transitions. [2021-03-11 04:27:14,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 70 transitions, 384 flow [2021-03-11 04:27:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 04:27:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-03-11 04:27:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2021-03-11 04:27:14,256 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.575 [2021-03-11 04:27:14,256 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 115 transitions. [2021-03-11 04:27:14,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 115 transitions. [2021-03-11 04:27:14,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:14,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 115 transitions. [2021-03-11 04:27:14,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2021-03-11 04:27:14,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:14,259 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:14,259 INFO L185 Difference]: Start difference. First operand has 33 places, 26 transitions, 99 flow. Second operand 10 states and 115 transitions. [2021-03-11 04:27:14,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 70 transitions, 384 flow [2021-03-11 04:27:14,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 70 transitions, 381 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 04:27:14,264 INFO L241 Difference]: Finished difference. Result has 44 places, 44 transitions, 272 flow [2021-03-11 04:27:14,265 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=272, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2021-03-11 04:27:14,265 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2021-03-11 04:27:14,265 INFO L480 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 272 flow [2021-03-11 04:27:14,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:14,265 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:14,265 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:27:14,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 04:27:14,266 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:14,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:14,267 INFO L82 PathProgramCache]: Analyzing trace with hash -348674961, now seen corresponding path program 1 times [2021-03-11 04:27:14,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:14,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022254724] [2021-03-11 04:27:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:14,295 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,295 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:14,298 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,298 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:14,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:14,307 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,307 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:14,311 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,312 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:27:14,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022254724] [2021-03-11 04:27:14,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011313383] [2021-03-11 04:27:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 04:27:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:14,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 04:27:14,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 04:27:14,348 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,349 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:14,349 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,350 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:14,350 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,350 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:14,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:14,355 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,357 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,357 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,358 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,363 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,363 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,372 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-11 04:27:14,377 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-11 04:27:14,389 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,391 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,392 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-11 04:27:14,394 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,404 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,407 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,416 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,416 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,417 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,417 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,418 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,418 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,419 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,420 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,431 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,432 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,432 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,433 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,433 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,433 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,434 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,437 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-11 04:27:14,455 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,456 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:27:14,456 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-11 04:27:14,457 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-11 04:27:14,460 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,464 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:27:14,465 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-11 04:27:14,465 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,468 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,469 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,469 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,479 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-11 04:27:14,481 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,482 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:27:14,483 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-11 04:27:14,485 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-11 04:27:14,487 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,489 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:27:14,489 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-11 04:27:14,491 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,493 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,493 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,494 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:27:14,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 04:27:14,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-11 04:27:14,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322713767] [2021-03-11 04:27:14,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 04:27:14,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:14,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 04:27:14,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-11 04:27:14,504 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-03-11 04:27:14,505 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 272 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:14,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:14,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-03-11 04:27:14,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:14,624 INFO L129 PetriNetUnfolder]: 416/869 cut-off events. [2021-03-11 04:27:14,624 INFO L130 PetriNetUnfolder]: For 1150/1150 co-relation queries the response was YES. [2021-03-11 04:27:14,626 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2725 conditions, 869 events. 416/869 cut-off events. For 1150/1150 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5156 event pairs, 55 based on Foata normal form. 39/844 useless extension candidates. Maximal degree in co-relation 2529. Up to 285 conditions per place. [2021-03-11 04:27:14,630 INFO L132 encePairwiseOnDemand]: 12/20 looper letters, 32 selfloop transitions, 26 changer transitions 0/63 dead transitions. [2021-03-11 04:27:14,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 63 transitions, 468 flow [2021-03-11 04:27:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 04:27:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-11 04:27:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2021-03-11 04:27:14,632 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5125 [2021-03-11 04:27:14,632 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 82 transitions. [2021-03-11 04:27:14,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 82 transitions. [2021-03-11 04:27:14,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:14,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 82 transitions. [2021-03-11 04:27:14,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:14,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 20.0) internal successors, (180), 9 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) [2021-03-11 04:27:14,635 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 20.0) internal successors, (180), 9 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) [2021-03-11 04:27:14,636 INFO L185 Difference]: Start difference. First operand has 44 places, 44 transitions, 272 flow. Second operand 8 states and 82 transitions. [2021-03-11 04:27:14,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 63 transitions, 468 flow [2021-03-11 04:27:14,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 456 flow, removed 5 selfloop flow, removed 1 redundant places. [2021-03-11 04:27:14,641 INFO L241 Difference]: Finished difference. Result has 52 places, 45 transitions, 346 flow [2021-03-11 04:27:14,641 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2021-03-11 04:27:14,642 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2021-03-11 04:27:14,642 INFO L480 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 346 flow [2021-03-11 04:27:14,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:14,642 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:14,642 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:27:14,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-03-11 04:27:14,859 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash -348674965, now seen corresponding path program 1 times [2021-03-11 04:27:14,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:14,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015601810] [2021-03-11 04:27:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:14,868 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,869 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:14,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:14,875 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:14,878 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,878 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:14,882 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:14,887 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:14,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:27:14,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015601810] [2021-03-11 04:27:14,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:27:14,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 04:27:14,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213858122] [2021-03-11 04:27:14,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 04:27:14,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:14,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 04:27:14,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-11 04:27:14,894 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-03-11 04:27:14,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 346 flow. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:14,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:14,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-03-11 04:27:14,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:15,073 INFO L129 PetriNetUnfolder]: 411/885 cut-off events. [2021-03-11 04:27:15,073 INFO L130 PetriNetUnfolder]: For 2247/2247 co-relation queries the response was YES. [2021-03-11 04:27:15,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3141 conditions, 885 events. 411/885 cut-off events. For 2247/2247 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5459 event pairs, 173 based on Foata normal form. 31/853 useless extension candidates. Maximal degree in co-relation 2578. Up to 352 conditions per place. [2021-03-11 04:27:15,079 INFO L132 encePairwiseOnDemand]: 12/20 looper letters, 50 selfloop transitions, 27 changer transitions 0/82 dead transitions. [2021-03-11 04:27:15,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 656 flow [2021-03-11 04:27:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 04:27:15,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-03-11 04:27:15,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2021-03-11 04:27:15,080 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2021-03-11 04:27:15,080 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 136 transitions. [2021-03-11 04:27:15,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 136 transitions. [2021-03-11 04:27:15,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:15,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 136 transitions. [2021-03-11 04:27:15,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:15,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 20.0) internal successors, (260), 13 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:15,082 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 20.0) internal successors, (260), 13 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:15,082 INFO L185 Difference]: Start difference. First operand has 52 places, 45 transitions, 346 flow. Second operand 12 states and 136 transitions. [2021-03-11 04:27:15,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 656 flow [2021-03-11 04:27:15,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 608 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-03-11 04:27:15,086 INFO L241 Difference]: Finished difference. Result has 61 places, 47 transitions, 399 flow [2021-03-11 04:27:15,086 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=399, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2021-03-11 04:27:15,086 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 34 predicate places. [2021-03-11 04:27:15,086 INFO L480 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 399 flow [2021-03-11 04:27:15,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:15,086 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:15,086 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:27:15,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 04:27:15,086 INFO L428 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:15,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:15,087 INFO L82 PathProgramCache]: Analyzing trace with hash -339906925, now seen corresponding path program 2 times [2021-03-11 04:27:15,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:15,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496179223] [2021-03-11 04:27:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:15,094 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:15,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:15,096 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:15,097 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:15,100 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:15,100 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:15,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:15,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:15,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:15,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:15,108 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:15,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 04:27:15,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496179223] [2021-03-11 04:27:15,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:27:15,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:27:15,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254269659] [2021-03-11 04:27:15,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 04:27:15,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:15,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 04:27:15,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-11 04:27:15,114 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-03-11 04:27:15,114 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 399 flow. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:15,114 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:15,114 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-03-11 04:27:15,114 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:15,291 INFO L129 PetriNetUnfolder]: 546/1244 cut-off events. [2021-03-11 04:27:15,291 INFO L130 PetriNetUnfolder]: For 3784/3784 co-relation queries the response was YES. [2021-03-11 04:27:15,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4465 conditions, 1244 events. 546/1244 cut-off events. For 3784/3784 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8863 event pairs, 132 based on Foata normal form. 14/1157 useless extension candidates. Maximal degree in co-relation 3123. Up to 357 conditions per place. [2021-03-11 04:27:15,301 INFO L132 encePairwiseOnDemand]: 12/20 looper letters, 45 selfloop transitions, 32 changer transitions 0/82 dead transitions. [2021-03-11 04:27:15,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 738 flow [2021-03-11 04:27:15,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 04:27:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-03-11 04:27:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2021-03-11 04:27:15,302 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.595 [2021-03-11 04:27:15,302 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 119 transitions. [2021-03-11 04:27:15,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 119 transitions. [2021-03-11 04:27:15,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:15,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 119 transitions. [2021-03-11 04:27:15,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:15,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:15,303 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:15,303 INFO L185 Difference]: Start difference. First operand has 61 places, 47 transitions, 399 flow. Second operand 10 states and 119 transitions. [2021-03-11 04:27:15,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 738 flow [2021-03-11 04:27:15,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 684 flow, removed 3 selfloop flow, removed 9 redundant places. [2021-03-11 04:27:15,309 INFO L241 Difference]: Finished difference. Result has 64 places, 51 transitions, 489 flow [2021-03-11 04:27:15,309 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=489, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2021-03-11 04:27:15,309 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 37 predicate places. [2021-03-11 04:27:15,309 INFO L480 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 489 flow [2021-03-11 04:27:15,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:15,309 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:15,309 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-03-11 04:27:15,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 04:27:15,310 INFO L428 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:15,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:15,310 INFO L82 PathProgramCache]: Analyzing trace with hash 2075805806, now seen corresponding path program 1 times [2021-03-11 04:27:15,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:15,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761440996] [2021-03-11 04:27:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:27:15,313 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:27:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:27:15,315 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:27:15,316 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 04:27:15,317 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 04:27:15,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 04:27:15,317 WARN L342 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 04:27:15,317 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-03-11 04:27:15,320 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,320 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,321 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,321 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,321 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,321 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,321 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,321 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,321 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,321 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,321 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,321 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,322 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,322 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,322 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,322 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:27:15,325 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 04:27:15,325 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-11 04:27:15,326 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:27:15,326 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:27:15,326 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:27:15,326 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:27:15,326 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:27:15,326 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:27:15,326 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:27:15,326 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:27:15,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 34 places, 25 transitions, 82 flow [2021-03-11 04:27:15,328 INFO L129 PetriNetUnfolder]: 0/32 cut-off events. [2021-03-11 04:27:15,328 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-03-11 04:27:15,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 32 events. 0/32 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-11 04:27:15,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 25 transitions, 82 flow [2021-03-11 04:27:15,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 25 transitions, 82 flow [2021-03-11 04:27:15,329 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-03-11 04:27:15,329 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-11 04:27:15,329 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:15,329 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 04:27:15,329 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:15,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:15,330 INFO L82 PathProgramCache]: Analyzing trace with hash 100404189, now seen corresponding path program 1 times [2021-03-11 04:27:15,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:15,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954200339] [2021-03-11 04:27:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:15,335 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:15,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:15,337 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:15,338 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:15,340 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:15,341 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:15,344 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:15,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:27:15,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954200339] [2021-03-11 04:27:15,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:27:15,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 04:27:15,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240410219] [2021-03-11 04:27:15,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:27:15,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:15,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:27:15,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:27:15,350 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-03-11 04:27:15,350 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:15,350 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:15,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-03-11 04:27:15,350 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:15,529 INFO L129 PetriNetUnfolder]: 1604/2502 cut-off events. [2021-03-11 04:27:15,529 INFO L130 PetriNetUnfolder]: For 726/726 co-relation queries the response was YES. [2021-03-11 04:27:15,533 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5176 conditions, 2502 events. 1604/2502 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 12494 event pairs, 600 based on Foata normal form. 0/1884 useless extension candidates. Maximal degree in co-relation 3735. Up to 2176 conditions per place. [2021-03-11 04:27:15,543 INFO L132 encePairwiseOnDemand]: 17/25 looper letters, 30 selfloop transitions, 11 changer transitions 0/47 dead transitions. [2021-03-11 04:27:15,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 47 transitions, 245 flow [2021-03-11 04:27:15,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:27:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:27:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2021-03-11 04:27:15,544 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.52 [2021-03-11 04:27:15,544 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 78 transitions. [2021-03-11 04:27:15,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 78 transitions. [2021-03-11 04:27:15,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:15,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 78 transitions. [2021-03-11 04:27:15,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:15,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:15,546 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:15,546 INFO L185 Difference]: Start difference. First operand has 34 places, 25 transitions, 82 flow. Second operand 6 states and 78 transitions. [2021-03-11 04:27:15,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 47 transitions, 245 flow [2021-03-11 04:27:15,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 221 flow, removed 12 selfloop flow, removed 0 redundant places. [2021-03-11 04:27:15,547 INFO L241 Difference]: Finished difference. Result has 40 places, 33 transitions, 126 flow [2021-03-11 04:27:15,547 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2021-03-11 04:27:15,547 INFO L335 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2021-03-11 04:27:15,547 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 126 flow [2021-03-11 04:27:15,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:15,548 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:15,548 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:27:15,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-11 04:27:15,548 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:15,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:15,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1998981745, now seen corresponding path program 1 times [2021-03-11 04:27:15,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:15,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125430492] [2021-03-11 04:27:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:15,565 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:15,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:15,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:15,568 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:15,571 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:15,571 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:15,574 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:15,575 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:15,579 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:15,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:27:15,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125430492] [2021-03-11 04:27:15,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:27:15,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:27:15,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734984663] [2021-03-11 04:27:15,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 04:27:15,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:15,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 04:27:15,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-11 04:27:15,585 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-03-11 04:27:15,585 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 126 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:15,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:15,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-03-11 04:27:15,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:16,024 INFO L129 PetriNetUnfolder]: 3369/5679 cut-off events. [2021-03-11 04:27:16,025 INFO L130 PetriNetUnfolder]: For 1932/1932 co-relation queries the response was YES. [2021-03-11 04:27:16,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13295 conditions, 5679 events. 3369/5679 cut-off events. For 1932/1932 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 38067 event pairs, 1471 based on Foata normal form. 0/4751 useless extension candidates. Maximal degree in co-relation 13077. Up to 2697 conditions per place. [2021-03-11 04:27:16,066 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 60 selfloop transitions, 29 changer transitions 0/95 dead transitions. [2021-03-11 04:27:16,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 95 transitions, 530 flow [2021-03-11 04:27:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 04:27:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-03-11 04:27:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2021-03-11 04:27:16,067 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.592 [2021-03-11 04:27:16,067 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 148 transitions. [2021-03-11 04:27:16,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 148 transitions. [2021-03-11 04:27:16,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:16,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 148 transitions. [2021-03-11 04:27:16,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:16,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 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) [2021-03-11 04:27:16,068 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 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) [2021-03-11 04:27:16,069 INFO L185 Difference]: Start difference. First operand has 40 places, 33 transitions, 126 flow. Second operand 10 states and 148 transitions. [2021-03-11 04:27:16,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 95 transitions, 530 flow [2021-03-11 04:27:16,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 527 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 04:27:16,072 INFO L241 Difference]: Finished difference. Result has 51 places, 55 transitions, 337 flow [2021-03-11 04:27:16,072 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=337, PETRI_PLACES=51, PETRI_TRANSITIONS=55} [2021-03-11 04:27:16,072 INFO L335 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2021-03-11 04:27:16,072 INFO L480 AbstractCegarLoop]: Abstraction has has 51 places, 55 transitions, 337 flow [2021-03-11 04:27:16,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:16,073 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:16,073 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:27:16,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-11 04:27:16,073 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:16,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:16,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1838891887, now seen corresponding path program 1 times [2021-03-11 04:27:16,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:16,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260825379] [2021-03-11 04:27:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:16,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:16,097 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:16,099 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:16,100 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:16,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:16,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:16,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:16,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:16,112 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:16,112 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:16,117 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:16,118 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:27:16,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260825379] [2021-03-11 04:27:16,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:27:16,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 04:27:16,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695284614] [2021-03-11 04:27:16,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 04:27:16,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:16,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 04:27:16,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-11 04:27:16,126 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-03-11 04:27:16,126 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 55 transitions, 337 flow. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:16,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:16,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-03-11 04:27:16,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:16,605 INFO L129 PetriNetUnfolder]: 3375/5622 cut-off events. [2021-03-11 04:27:16,605 INFO L130 PetriNetUnfolder]: For 7321/7321 co-relation queries the response was YES. [2021-03-11 04:27:16,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17447 conditions, 5622 events. 3375/5622 cut-off events. For 7321/7321 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 36711 event pairs, 1363 based on Foata normal form. 90/5115 useless extension candidates. Maximal degree in co-relation 7044. Up to 2508 conditions per place. [2021-03-11 04:27:16,672 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 85 selfloop transitions, 42 changer transitions 0/133 dead transitions. [2021-03-11 04:27:16,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 133 transitions, 908 flow [2021-03-11 04:27:16,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 04:27:16,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-03-11 04:27:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 205 transitions. [2021-03-11 04:27:16,674 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2021-03-11 04:27:16,674 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 205 transitions. [2021-03-11 04:27:16,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 205 transitions. [2021-03-11 04:27:16,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:16,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 205 transitions. [2021-03-11 04:27:16,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 15.76923076923077) internal successors, (205), 13 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:16,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 25.0) internal successors, (350), 14 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:16,675 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 25.0) internal successors, (350), 14 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:16,675 INFO L185 Difference]: Start difference. First operand has 51 places, 55 transitions, 337 flow. Second operand 13 states and 205 transitions. [2021-03-11 04:27:16,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 133 transitions, 908 flow [2021-03-11 04:27:16,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 133 transitions, 886 flow, removed 10 selfloop flow, removed 1 redundant places. [2021-03-11 04:27:16,682 INFO L241 Difference]: Finished difference. Result has 65 places, 68 transitions, 520 flow [2021-03-11 04:27:16,682 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=520, PETRI_PLACES=65, PETRI_TRANSITIONS=68} [2021-03-11 04:27:16,682 INFO L335 CegarLoopForPetriNet]: 34 programPoint places, 31 predicate places. [2021-03-11 04:27:16,682 INFO L480 AbstractCegarLoop]: Abstraction has has 65 places, 68 transitions, 520 flow [2021-03-11 04:27:16,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:16,682 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:16,683 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:27:16,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-11 04:27:16,683 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:16,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:16,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1843846927, now seen corresponding path program 2 times [2021-03-11 04:27:16,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:16,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601318986] [2021-03-11 04:27:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:16,700 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:16,704 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:16,706 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:16,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:16,709 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:16,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:16,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:16,713 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:16,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:16,713 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:16,719 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:16,719 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 04:27:16,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601318986] [2021-03-11 04:27:16,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:27:16,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:27:16,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867845791] [2021-03-11 04:27:16,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 04:27:16,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:16,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 04:27:16,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-11 04:27:16,725 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-03-11 04:27:16,725 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 68 transitions, 520 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:16,725 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:16,725 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-03-11 04:27:16,725 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:17,331 INFO L129 PetriNetUnfolder]: 4784/8192 cut-off events. [2021-03-11 04:27:17,331 INFO L130 PetriNetUnfolder]: For 18946/18946 co-relation queries the response was YES. [2021-03-11 04:27:17,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28019 conditions, 8192 events. 4784/8192 cut-off events. For 18946/18946 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 60069 event pairs, 1025 based on Foata normal form. 33/7310 useless extension candidates. Maximal degree in co-relation 16180. Up to 2755 conditions per place. [2021-03-11 04:27:17,383 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 67 selfloop transitions, 55 changer transitions 0/128 dead transitions. [2021-03-11 04:27:17,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 128 transitions, 1075 flow [2021-03-11 04:27:17,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 04:27:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-03-11 04:27:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2021-03-11 04:27:17,384 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.624 [2021-03-11 04:27:17,384 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 156 transitions. [2021-03-11 04:27:17,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 156 transitions. [2021-03-11 04:27:17,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:17,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 156 transitions. [2021-03-11 04:27:17,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:17,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 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) [2021-03-11 04:27:17,385 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 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) [2021-03-11 04:27:17,385 INFO L185 Difference]: Start difference. First operand has 65 places, 68 transitions, 520 flow. Second operand 10 states and 156 transitions. [2021-03-11 04:27:17,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 128 transitions, 1075 flow [2021-03-11 04:27:17,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 128 transitions, 975 flow, removed 12 selfloop flow, removed 9 redundant places. [2021-03-11 04:27:17,404 INFO L241 Difference]: Finished difference. Result has 68 places, 82 transitions, 717 flow [2021-03-11 04:27:17,404 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=717, PETRI_PLACES=68, PETRI_TRANSITIONS=82} [2021-03-11 04:27:17,404 INFO L335 CegarLoopForPetriNet]: 34 programPoint places, 34 predicate places. [2021-03-11 04:27:17,404 INFO L480 AbstractCegarLoop]: Abstraction has has 68 places, 82 transitions, 717 flow [2021-03-11 04:27:17,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:17,404 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:17,404 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:27:17,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-11 04:27:17,405 INFO L428 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:17,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:17,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1843846923, now seen corresponding path program 1 times [2021-03-11 04:27:17,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:17,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356619843] [2021-03-11 04:27:17,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:17,420 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:17,422 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,422 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:17,425 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,425 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:17,429 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,430 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:17,433 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,433 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:27:17,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356619843] [2021-03-11 04:27:17,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209299603] [2021-03-11 04:27:17,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 04:27:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:17,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 04:27:17,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 04:27:17,464 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,464 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:17,464 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,465 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:17,465 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,465 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:17,466 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,466 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:17,467 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,467 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,468 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,468 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,468 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,470 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,470 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,470 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,476 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,476 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-11 04:27:17,477 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-11 04:27:17,478 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,479 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,480 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-11 04:27:17,481 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,481 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,482 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,482 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,488 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-11 04:27:17,489 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,489 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:27:17,489 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-11 04:27:17,490 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-11 04:27:17,491 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,491 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:27:17,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-11 04:27:17,492 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,493 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,493 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,494 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,500 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,500 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,501 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,501 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,502 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,502 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,502 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,503 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,504 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,504 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,504 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,505 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,505 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,505 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,505 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,506 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-11 04:27:17,507 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,508 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:27:17,508 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-11 04:27:17,509 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-11 04:27:17,510 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,510 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:27:17,511 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-03-11 04:27:17,511 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,512 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,512 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:17,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:27:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:27:17,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 04:27:17,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-11 04:27:17,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029657998] [2021-03-11 04:27:17,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 04:27:17,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:17,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 04:27:17,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-11 04:27:17,522 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-03-11 04:27:17,522 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 82 transitions, 717 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:17,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:17,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-03-11 04:27:17,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:18,283 INFO L129 PetriNetUnfolder]: 5107/8972 cut-off events. [2021-03-11 04:27:18,283 INFO L130 PetriNetUnfolder]: For 36049/36049 co-relation queries the response was YES. [2021-03-11 04:27:18,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33930 conditions, 8972 events. 5107/8972 cut-off events. For 36049/36049 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 69307 event pairs, 1386 based on Foata normal form. 128/7986 useless extension candidates. Maximal degree in co-relation 17947. Up to 5115 conditions per place. [2021-03-11 04:27:18,354 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 68 selfloop transitions, 54 changer transitions 0/128 dead transitions. [2021-03-11 04:27:18,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 128 transitions, 1281 flow [2021-03-11 04:27:18,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 04:27:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-11 04:27:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2021-03-11 04:27:18,355 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.56 [2021-03-11 04:27:18,356 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 112 transitions. [2021-03-11 04:27:18,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 112 transitions. [2021-03-11 04:27:18,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:18,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 112 transitions. [2021-03-11 04:27:18,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.0) internal successors, (112), 8 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) [2021-03-11 04:27:18,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 25.0) internal successors, (225), 9 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:18,357 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 25.0) internal successors, (225), 9 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:18,357 INFO L185 Difference]: Start difference. First operand has 68 places, 82 transitions, 717 flow. Second operand 8 states and 112 transitions. [2021-03-11 04:27:18,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 128 transitions, 1281 flow [2021-03-11 04:27:18,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 128 transitions, 1213 flow, removed 17 selfloop flow, removed 6 redundant places. [2021-03-11 04:27:18,389 INFO L241 Difference]: Finished difference. Result has 72 places, 98 transitions, 1029 flow [2021-03-11 04:27:18,390 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1029, PETRI_PLACES=72, PETRI_TRANSITIONS=98} [2021-03-11 04:27:18,390 INFO L335 CegarLoopForPetriNet]: 34 programPoint places, 38 predicate places. [2021-03-11 04:27:18,390 INFO L480 AbstractCegarLoop]: Abstraction has has 72 places, 98 transitions, 1029 flow [2021-03-11 04:27:18,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:18,390 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:18,390 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:27:18,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-11 04:27:18,606 INFO L428 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:18,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1170789958, now seen corresponding path program 1 times [2021-03-11 04:27:18,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:18,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881501468] [2021-03-11 04:27:18,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:18,613 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:18,613 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:18,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:18,615 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:18,618 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:18,618 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:18,621 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:18,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:18,625 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:18,625 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:18,629 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:18,630 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:27:18,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881501468] [2021-03-11 04:27:18,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:27:18,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 04:27:18,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628751598] [2021-03-11 04:27:18,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 04:27:18,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:18,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 04:27:18,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-11 04:27:18,635 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-03-11 04:27:18,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 98 transitions, 1029 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:18,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:18,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-03-11 04:27:18,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:19,623 INFO L129 PetriNetUnfolder]: 6442/11228 cut-off events. [2021-03-11 04:27:19,624 INFO L130 PetriNetUnfolder]: For 53312/53312 co-relation queries the response was YES. [2021-03-11 04:27:19,662 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45884 conditions, 11228 events. 6442/11228 cut-off events. For 53312/53312 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 89219 event pairs, 3091 based on Foata normal form. 0/9813 useless extension candidates. Maximal degree in co-relation 26029. Up to 5206 conditions per place. [2021-03-11 04:27:19,733 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 90 selfloop transitions, 103 changer transitions 0/199 dead transitions. [2021-03-11 04:27:19,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 199 transitions, 2290 flow [2021-03-11 04:27:19,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 04:27:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-03-11 04:27:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 171 transitions. [2021-03-11 04:27:19,734 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.57 [2021-03-11 04:27:19,734 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 171 transitions. [2021-03-11 04:27:19,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 171 transitions. [2021-03-11 04:27:19,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:19,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 171 transitions. [2021-03-11 04:27:19,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:19,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:19,735 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:19,735 INFO L185 Difference]: Start difference. First operand has 72 places, 98 transitions, 1029 flow. Second operand 12 states and 171 transitions. [2021-03-11 04:27:19,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 199 transitions, 2290 flow [2021-03-11 04:27:19,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 199 transitions, 2177 flow, removed 34 selfloop flow, removed 4 redundant places. [2021-03-11 04:27:19,783 INFO L241 Difference]: Finished difference. Result has 83 places, 159 transitions, 1951 flow [2021-03-11 04:27:19,783 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1951, PETRI_PLACES=83, PETRI_TRANSITIONS=159} [2021-03-11 04:27:19,784 INFO L335 CegarLoopForPetriNet]: 34 programPoint places, 49 predicate places. [2021-03-11 04:27:19,784 INFO L480 AbstractCegarLoop]: Abstraction has has 83 places, 159 transitions, 1951 flow [2021-03-11 04:27:19,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:19,784 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:19,784 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:27:19,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-11 04:27:19,784 INFO L428 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:19,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:19,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1943378240, now seen corresponding path program 1 times [2021-03-11 04:27:19,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:19,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501734405] [2021-03-11 04:27:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:19,802 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:19,803 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:19,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:19,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:19,809 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:19,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:19,814 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:19,814 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:19,814 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:19,815 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:19,815 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:19,815 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:19,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:19,819 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 04:27:19,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501734405] [2021-03-11 04:27:19,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:27:19,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:27:19,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385798380] [2021-03-11 04:27:19,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 04:27:19,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:19,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 04:27:19,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-11 04:27:19,830 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-03-11 04:27:19,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 159 transitions, 1951 flow. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:19,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:19,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-03-11 04:27:19,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:20,861 INFO L129 PetriNetUnfolder]: 6640/11653 cut-off events. [2021-03-11 04:27:20,861 INFO L130 PetriNetUnfolder]: For 60712/60712 co-relation queries the response was YES. [2021-03-11 04:27:20,894 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52523 conditions, 11653 events. 6640/11653 cut-off events. For 60712/60712 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 93450 event pairs, 3337 based on Foata normal form. 28/11030 useless extension candidates. Maximal degree in co-relation 30692. Up to 7574 conditions per place. [2021-03-11 04:27:20,945 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 117 selfloop transitions, 88 changer transitions 0/211 dead transitions. [2021-03-11 04:27:20,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 211 transitions, 2774 flow [2021-03-11 04:27:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 04:27:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-03-11 04:27:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 159 transitions. [2021-03-11 04:27:20,946 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5781818181818181 [2021-03-11 04:27:20,946 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 159 transitions. [2021-03-11 04:27:20,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 159 transitions. [2021-03-11 04:27:20,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:20,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 159 transitions. [2021-03-11 04:27:20,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:20,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 25.0) internal successors, (300), 12 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:20,947 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 25.0) internal successors, (300), 12 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:20,947 INFO L185 Difference]: Start difference. First operand has 83 places, 159 transitions, 1951 flow. Second operand 11 states and 159 transitions. [2021-03-11 04:27:20,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 211 transitions, 2774 flow [2021-03-11 04:27:21,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 211 transitions, 2716 flow, removed 25 selfloop flow, removed 3 redundant places. [2021-03-11 04:27:21,010 INFO L241 Difference]: Finished difference. Result has 93 places, 174 transitions, 2419 flow [2021-03-11 04:27:21,010 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1905, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2419, PETRI_PLACES=93, PETRI_TRANSITIONS=174} [2021-03-11 04:27:21,011 INFO L335 CegarLoopForPetriNet]: 34 programPoint places, 59 predicate places. [2021-03-11 04:27:21,011 INFO L480 AbstractCegarLoop]: Abstraction has has 93 places, 174 transitions, 2419 flow [2021-03-11 04:27:21,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:21,011 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:21,011 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:27:21,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-03-11 04:27:21,011 INFO L428 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:21,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:21,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1934750630, now seen corresponding path program 2 times [2021-03-11 04:27:21,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:21,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617445493] [2021-03-11 04:27:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:21,017 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:21,017 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:21,019 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:21,019 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:21,021 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:21,021 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:21,024 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:21,024 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:21,028 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:21,029 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:21,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:21,032 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:21,036 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:21,037 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:27:21,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617445493] [2021-03-11 04:27:21,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:27:21,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 04:27:21,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566237811] [2021-03-11 04:27:21,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 04:27:21,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:21,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 04:27:21,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 04:27:21,042 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-03-11 04:27:21,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 174 transitions, 2419 flow. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:21,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:21,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-03-11 04:27:21,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:22,131 INFO L129 PetriNetUnfolder]: 6454/11461 cut-off events. [2021-03-11 04:27:22,131 INFO L130 PetriNetUnfolder]: For 67720/67720 co-relation queries the response was YES. [2021-03-11 04:27:22,233 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54171 conditions, 11461 events. 6454/11461 cut-off events. For 67720/67720 co-relation queries the response was YES. Maximal size of possible extension queue 1092. Compared 93429 event pairs, 3276 based on Foata normal form. 66/10882 useless extension candidates. Maximal degree in co-relation 30206. Up to 5166 conditions per place. [2021-03-11 04:27:22,282 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 99 selfloop transitions, 120 changer transitions 0/225 dead transitions. [2021-03-11 04:27:22,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 225 transitions, 3079 flow [2021-03-11 04:27:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 04:27:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-03-11 04:27:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 203 transitions. [2021-03-11 04:27:22,283 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.58 [2021-03-11 04:27:22,283 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 203 transitions. [2021-03-11 04:27:22,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 203 transitions. [2021-03-11 04:27:22,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:22,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 203 transitions. [2021-03-11 04:27:22,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 14.5) internal successors, (203), 14 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:22,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:22,285 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:22,285 INFO L185 Difference]: Start difference. First operand has 93 places, 174 transitions, 2419 flow. Second operand 14 states and 203 transitions. [2021-03-11 04:27:22,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 225 transitions, 3079 flow [2021-03-11 04:27:22,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 225 transitions, 3025 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-03-11 04:27:22,366 INFO L241 Difference]: Finished difference. Result has 105 places, 176 transitions, 2764 flow [2021-03-11 04:27:22,366 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2764, PETRI_PLACES=105, PETRI_TRANSITIONS=176} [2021-03-11 04:27:22,366 INFO L335 CegarLoopForPetriNet]: 34 programPoint places, 71 predicate places. [2021-03-11 04:27:22,366 INFO L480 AbstractCegarLoop]: Abstraction has has 105 places, 176 transitions, 2764 flow [2021-03-11 04:27:22,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:22,366 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:22,366 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:27:22,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-03-11 04:27:22,366 INFO L428 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:22,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:22,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1884882076, now seen corresponding path program 1 times [2021-03-11 04:27:22,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:22,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42276217] [2021-03-11 04:27:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:27:22,374 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:22,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:22,376 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:22,376 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:22,379 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:22,379 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:22,382 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:22,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:22,383 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:22,383 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:22,386 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:22,386 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 04:27:22,390 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:27:22,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:27:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 04:27:22,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42276217] [2021-03-11 04:27:22,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:27:22,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 04:27:22,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858661992] [2021-03-11 04:27:22,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 04:27:22,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:27:22,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 04:27:22,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-11 04:27:22,395 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-03-11 04:27:22,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 176 transitions, 2764 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:22,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:27:22,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-03-11 04:27:22,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:27:23,684 INFO L129 PetriNetUnfolder]: 8245/14812 cut-off events. [2021-03-11 04:27:23,685 INFO L130 PetriNetUnfolder]: For 116915/116915 co-relation queries the response was YES. [2021-03-11 04:27:23,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73743 conditions, 14812 events. 8245/14812 cut-off events. For 116915/116915 co-relation queries the response was YES. Maximal size of possible extension queue 1488. Compared 129160 event pairs, 2152 based on Foata normal form. 14/13977 useless extension candidates. Maximal degree in co-relation 48110. Up to 4428 conditions per place. [2021-03-11 04:27:23,802 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 75 selfloop transitions, 171 changer transitions 0/252 dead transitions. [2021-03-11 04:27:23,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 252 transitions, 3877 flow [2021-03-11 04:27:23,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 04:27:23,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-03-11 04:27:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 178 transitions. [2021-03-11 04:27:23,805 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2021-03-11 04:27:23,805 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 178 transitions. [2021-03-11 04:27:23,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 178 transitions. [2021-03-11 04:27:23,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:27:23,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 178 transitions. [2021-03-11 04:27:23,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 14.833333333333334) internal successors, (178), 12 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:23,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:23,806 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:23,806 INFO L185 Difference]: Start difference. First operand has 105 places, 176 transitions, 2764 flow. Second operand 12 states and 178 transitions. [2021-03-11 04:27:23,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 252 transitions, 3877 flow [2021-03-11 04:27:23,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 252 transitions, 3621 flow, removed 9 selfloop flow, removed 11 redundant places. [2021-03-11 04:27:23,976 INFO L241 Difference]: Finished difference. Result has 109 places, 205 transitions, 3500 flow [2021-03-11 04:27:23,977 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3500, PETRI_PLACES=109, PETRI_TRANSITIONS=205} [2021-03-11 04:27:23,977 INFO L335 CegarLoopForPetriNet]: 34 programPoint places, 75 predicate places. [2021-03-11 04:27:23,977 INFO L480 AbstractCegarLoop]: Abstraction has has 109 places, 205 transitions, 3500 flow [2021-03-11 04:27:23,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:27:23,977 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:27:23,977 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:27:23,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-03-11 04:27:23,977 INFO L428 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:27:23,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:27:23,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1706825702, now seen corresponding path program 1 times [2021-03-11 04:27:23,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:27:23,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322865853] [2021-03-11 04:27:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:27:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:27:23,981 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:27:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:27:23,982 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:27:23,985 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 04:27:23,985 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 04:27:23,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-03-11 04:27:24,006 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 04:27:24 BasicIcfg [2021-03-11 04:27:24,006 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 04:27:24,007 INFO L168 Benchmark]: Toolchain (without parser) took 10997.31 ms. Allocated memory was 367.0 MB in the beginning and 5.5 GB in the end (delta: 5.1 GB). Free memory was 347.4 MB in the beginning and 4.8 GB in the end (delta: -4.4 GB). Peak memory consumption was 676.6 MB. Max. memory is 16.0 GB. [2021-03-11 04:27:24,007 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 367.0 MB. Free memory was 348.4 MB in the beginning and 348.3 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 04:27:24,007 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.01 ms. Allocated memory is still 367.0 MB. Free memory was 346.9 MB in the beginning and 345.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 04:27:24,007 INFO L168 Benchmark]: Boogie Preprocessor took 12.06 ms. Allocated memory is still 367.0 MB. Free memory was 345.4 MB in the beginning and 344.5 MB in the end (delta: 896.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 04:27:24,007 INFO L168 Benchmark]: RCFGBuilder took 145.48 ms. Allocated memory is still 367.0 MB. Free memory was 344.5 MB in the beginning and 335.8 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-11 04:27:24,007 INFO L168 Benchmark]: TraceAbstraction took 10817.20 ms. Allocated memory was 367.0 MB in the beginning and 5.5 GB in the end (delta: 5.1 GB). Free memory was 335.4 MB in the beginning and 4.8 GB in the end (delta: -4.4 GB). Peak memory consumption was 664.0 MB. Max. memory is 16.0 GB. [2021-03-11 04:27:24,008 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 0.10 ms. Allocated memory is still 367.0 MB. Free memory was 348.4 MB in the beginning and 348.3 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 16.01 ms. Allocated memory is still 367.0 MB. Free memory was 346.9 MB in the beginning and 345.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.06 ms. Allocated memory is still 367.0 MB. Free memory was 345.4 MB in the beginning and 344.5 MB in the end (delta: 896.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 145.48 ms. Allocated memory is still 367.0 MB. Free memory was 344.5 MB in the beginning and 335.8 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 10817.20 ms. Allocated memory was 367.0 MB in the beginning and 5.5 GB in the end (delta: 5.1 GB). Free memory was 335.4 MB in the beginning and 4.8 GB in the end (delta: -4.4 GB). Peak memory consumption was 664.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: assertion can be violated assertion can be violated We found a FailurePath: [L24] 0 x := 0; VAL [x=0] [L25] 0 i := 0; VAL [i=0, x=0] [L28] FORK 0 fork i thread(i); VAL [i=0, x=0, y=0] [L16] 1 x := x + 1; VAL [i=0, x=1, y=0] [L29] 0 i := i + 1; VAL [i=1, x=1, y=0] [L28] FORK 0 fork i thread(i); VAL [i=1, x=1, y=0] [L16] 2 x := x + 1; VAL [i=1, x=2, y=0] [L29] 0 i := i + 1; VAL [i=2, x=2, y=0] [L28] FORK 0 fork i thread(i); VAL [i=2, x=2, y=0] [L16] 3 x := x + 1; VAL [i=2, x=3, y=0] [L17] 1 assert x <= y + 2; VAL [i=2, x=3, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. Started 4 CEGAR loops. EmptinessCheckTime: 5.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 10690.1ms, OverallIterations: 20, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 9156.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 38.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 64 SDtfs, 750 SDslu, 136 SDs, 0 SdLazy, 2306 SolverSat, 337 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1031.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 172 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 798.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3500occurred in iteration=9, InterpolantAutomatonStates: 154, 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: 19.5ms SsaConstructionTime, 83.2ms SatisfiabilityAnalysisTime, 715.6ms InterpolantComputationTime, 169 NumberOfCodeBlocks, 169 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 119 ConstructedInterpolants, 0 QuantifiedInterpolants, 487 SizeOfPredicates, 2 NumberOfNonLiveVariables, 42 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 18 InterpolantComputations, 14 PerfectInterpolantSequences, 22/26 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...