/usr/bin/java -Xmx8000000000 -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-OGIterative.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_noop.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-13 02:36:13,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-13 02:36:13,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-13 02:36:13,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-13 02:36:14,016 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-OGIterative.epf [2021-08-13 02:36:14,038 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-13 02:36:14,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-13 02:36:14,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-13 02:36:14,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-13 02:36:14,040 INFO L138 SettingsManager]: * Use SBE=true [2021-08-13 02:36:14,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-13 02:36:14,040 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-13 02:36:14,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-13 02:36:14,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-13 02:36:14,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-13 02:36:14,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-13 02:36:14,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-13 02:36:14,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-13 02:36:14,041 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-13 02:36:14,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-13 02:36:14,042 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-13 02:36:14,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-13 02:36:14,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-13 02:36:14,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-13 02:36:14,042 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-13 02:36:14,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-13 02:36:14,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 02:36:14,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-13 02:36:14,043 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-13 02:36:14,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-13 02:36:14,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-13 02:36:14,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-13 02:36:14,043 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-13 02:36:14,043 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-08-13 02:36:14,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-13 02:36:14,044 INFO L138 SettingsManager]: * Compute cosets for OwickiGries annotation iteratively=true [2021-08-13 02:36:14,044 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-13 02:36:14,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-13 02:36:14,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-13 02:36:14,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-13 02:36:14,343 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-13 02:36:14,344 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-13 02:36:14,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_noop.bpl [2021-08-13 02:36:14,345 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_noop.bpl' [2021-08-13 02:36:14,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-13 02:36:14,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-13 02:36:14,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-13 02:36:14,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-13 02:36:14,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-13 02:36:14,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:14" (1/1) ... [2021-08-13 02:36:14,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:14" (1/1) ... [2021-08-13 02:36:14,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-13 02:36:14,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-13 02:36:14,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-13 02:36:14,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-13 02:36:14,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:14" (1/1) ... [2021-08-13 02:36:14,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:14" (1/1) ... [2021-08-13 02:36:14,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:14" (1/1) ... [2021-08-13 02:36:14,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:14" (1/1) ... [2021-08-13 02:36:14,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:14" (1/1) ... [2021-08-13 02:36:14,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:14" (1/1) ... [2021-08-13 02:36:14,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:14" (1/1) ... [2021-08-13 02:36:14,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-13 02:36:14,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-13 02:36:14,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-13 02:36:14,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-13 02:36:14,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:14" (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 [2021-08-13 02:36:14,490 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-13 02:36:14,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-13 02:36:14,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-13 02:36:14,491 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-08-13 02:36:14,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-08-13 02:36:14,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-08-13 02:36:14,491 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-13 02:36:14,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-13 02:36:14,609 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-13 02:36:14,610 INFO L202 PluginConnector]: Adding new model fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 02:36:14 BoogieIcfgContainer [2021-08-13 02:36:14,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-13 02:36:14,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-13 02:36:14,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-13 02:36:14,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-13 02:36:14,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:14" (1/2) ... [2021-08-13 02:36:14,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269f0e5d and model type fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.08 02:36:14, skipping insertion in model container [2021-08-13 02:36:14,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 02:36:14" (2/2) ... [2021-08-13 02:36:14,617 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_noop.bpl [2021-08-13 02:36:14,626 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-13 02:36:14,627 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-13 02:36:14,627 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-13 02:36:14,659 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:14,679 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:14,710 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:14,710 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:14,710 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:14,710 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:14,710 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:14,711 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:14,711 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:14,711 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:14,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 11 places, 8 transitions, 21 flow [2021-08-13 02:36:14,746 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-08-13 02:36:14,746 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:14,748 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 5. Compared 19 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-08-13 02:36:14,748 INFO L82 GeneralOperation]: Start removeDead. Operand has 11 places, 8 transitions, 21 flow [2021-08-13 02:36:14,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 9 places, 6 transitions, 17 flow [2021-08-13 02:36:14,756 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:14,756 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:14,757 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:14,757 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:14,758 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:14,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:14,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1315, now seen corresponding path program 1 times [2021-08-13 02:36:14,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:14,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63363960] [2021-08-13 02:36:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:14,869 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:14,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:14,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:14,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63363960] [2021-08-13 02:36:14,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63363960] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:14,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:14,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:14,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650118702] [2021-08-13 02:36:14,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:14,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:14,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:14,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:14,914 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 8 [2021-08-13 02:36:14,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 9 places, 6 transitions, 17 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:14,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:14,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 8 [2021-08-13 02:36:14,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:14,925 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-08-13 02:36:14,925 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:14,926 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12 conditions, 5 events. 0/5 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 2/7 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-08-13 02:36:14,927 INFO L132 encePairwiseOnDemand]: 6/8 looper letters, 0 selfloop transitions, 1 changer transitions 0/5 dead transitions. [2021-08-13 02:36:14,927 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 5 transitions, 17 flow [2021-08-13 02:36:14,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:14,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 17 transitions. [2021-08-13 02:36:14,935 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2021-08-13 02:36:14,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 17 transitions. [2021-08-13 02:36:14,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 17 transitions. [2021-08-13 02:36:14,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:14,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 17 transitions. [2021-08-13 02:36:14,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:14,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:14,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:14,946 INFO L348 CegarLoopForPetriNet]: 9 programPoint places, 1 predicate places. [2021-08-13 02:36:14,947 INFO L482 AbstractCegarLoop]: Abstraction has has 10 places, 5 transitions, 17 flow [2021-08-13 02:36:14,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:14,948 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:14,948 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2021-08-13 02:36:14,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-13 02:36:14,949 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:14,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:14,951 INFO L82 PathProgramCache]: Analyzing trace with hash 41033, now seen corresponding path program 1 times [2021-08-13 02:36:14,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:14,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694969701] [2021-08-13 02:36:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:14,959 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:14,972 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:14,983 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:14,984 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:14,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-13 02:36:14,986 WARN L235 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:14,986 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-08-13 02:36:14,999 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:15,000 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:15,003 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:15,004 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:15,004 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:15,004 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:15,004 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:15,004 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:15,004 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:15,004 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:15,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 11 transitions, 34 flow [2021-08-13 02:36:15,011 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-08-13 02:36:15,011 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,012 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 39 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-08-13 02:36:15,012 INFO L82 GeneralOperation]: Start removeDead. Operand has 16 places, 11 transitions, 34 flow [2021-08-13 02:36:15,013 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 14 places, 9 transitions, 30 flow [2021-08-13 02:36:15,014 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:15,014 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,015 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,015 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:15,015 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1667, now seen corresponding path program 1 times [2021-08-13 02:36:15,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608625146] [2021-08-13 02:36:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:15,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:15,033 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:15,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:15,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:15,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608625146] [2021-08-13 02:36:15,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608625146] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:15,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:15,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:15,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985630265] [2021-08-13 02:36:15,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:15,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:15,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:15,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:15,071 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 11 [2021-08-13 02:36:15,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 9 transitions, 30 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) [2021-08-13 02:36:15,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:15,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 11 [2021-08-13 02:36:15,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:15,074 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-08-13 02:36:15,074 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,074 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 8 events. 0/8 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 6 event pairs, 0 based on Foata normal form. 3/11 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-08-13 02:36:15,074 INFO L132 encePairwiseOnDemand]: 9/11 looper letters, 0 selfloop transitions, 1 changer transitions 0/8 dead transitions. [2021-08-13 02:36:15,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 8 transitions, 30 flow [2021-08-13 02:36:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2021-08-13 02:36:15,075 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2021-08-13 02:36:15,075 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 26 transitions. [2021-08-13 02:36:15,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 26 transitions. [2021-08-13 02:36:15,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:15,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 26 transitions. [2021-08-13 02:36:15,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) [2021-08-13 02:36:15,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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) [2021-08-13 02:36:15,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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) [2021-08-13 02:36:15,077 INFO L348 CegarLoopForPetriNet]: 14 programPoint places, 1 predicate places. [2021-08-13 02:36:15,077 INFO L482 AbstractCegarLoop]: Abstraction has has 15 places, 8 transitions, 30 flow [2021-08-13 02:36:15,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) [2021-08-13 02:36:15,077 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,077 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-08-13 02:36:15,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-13 02:36:15,078 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1612715, now seen corresponding path program 1 times [2021-08-13 02:36:15,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853555757] [2021-08-13 02:36:15,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,082 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,084 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,087 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:15,087 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:15,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-13 02:36:15,087 WARN L235 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:15,088 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-08-13 02:36:15,120 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:15,121 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:15,122 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:15,122 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:15,122 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:15,123 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:15,123 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:15,123 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:15,123 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:15,123 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:15,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 14 transitions, 49 flow [2021-08-13 02:36:15,128 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-08-13 02:36:15,128 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 23 events. 0/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 66 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-08-13 02:36:15,129 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 14 transitions, 49 flow [2021-08-13 02:36:15,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 12 transitions, 45 flow [2021-08-13 02:36:15,145 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:15,145 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,145 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,146 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:15,146 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2115, now seen corresponding path program 1 times [2021-08-13 02:36:15,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460249105] [2021-08-13 02:36:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:15,152 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:15,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:15,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:15,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460249105] [2021-08-13 02:36:15,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460249105] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:15,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:15,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:15,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869286757] [2021-08-13 02:36:15,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:15,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:15,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:15,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:15,160 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 14 [2021-08-13 02:36:15,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 12 transitions, 45 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 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) [2021-08-13 02:36:15,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:15,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 14 [2021-08-13 02:36:15,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:15,164 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-08-13 02:36:15,164 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 11 events. 0/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 4/15 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-08-13 02:36:15,165 INFO L132 encePairwiseOnDemand]: 12/14 looper letters, 0 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2021-08-13 02:36:15,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 11 transitions, 45 flow [2021-08-13 02:36:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 35 transitions. [2021-08-13 02:36:15,165 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-08-13 02:36:15,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 35 transitions. [2021-08-13 02:36:15,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 35 transitions. [2021-08-13 02:36:15,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:15,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 35 transitions. [2021-08-13 02:36:15,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 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) [2021-08-13 02:36:15,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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) [2021-08-13 02:36:15,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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) [2021-08-13 02:36:15,167 INFO L348 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2021-08-13 02:36:15,167 INFO L482 AbstractCegarLoop]: Abstraction has has 20 places, 11 transitions, 45 flow [2021-08-13 02:36:15,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 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) [2021-08-13 02:36:15,168 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,168 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:36:15,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-13 02:36:15,168 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash 63416129, now seen corresponding path program 1 times [2021-08-13 02:36:15,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157103152] [2021-08-13 02:36:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,172 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,174 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,175 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:15,175 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:15,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-13 02:36:15,176 WARN L235 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:15,176 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-08-13 02:36:15,187 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:15,187 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:15,188 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:15,188 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:15,188 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:15,188 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:15,188 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:15,188 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:15,188 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:15,189 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:15,189 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 26 places, 17 transitions, 66 flow [2021-08-13 02:36:15,195 INFO L129 PetriNetUnfolder]: 0/29 cut-off events. [2021-08-13 02:36:15,195 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 90 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-08-13 02:36:15,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 17 transitions, 66 flow [2021-08-13 02:36:15,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 15 transitions, 62 flow [2021-08-13 02:36:15,197 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:15,197 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,197 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,197 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:15,197 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2659, now seen corresponding path program 1 times [2021-08-13 02:36:15,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498930966] [2021-08-13 02:36:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:15,203 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:15,204 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:15,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:15,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498930966] [2021-08-13 02:36:15,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498930966] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:15,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:15,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:15,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079853157] [2021-08-13 02:36:15,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:15,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:15,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:15,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:15,209 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 17 [2021-08-13 02:36:15,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 15 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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) [2021-08-13 02:36:15,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:15,210 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 17 [2021-08-13 02:36:15,210 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:15,214 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-08-13 02:36:15,214 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 14 events. 0/14 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 18 event pairs, 0 based on Foata normal form. 5/19 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-08-13 02:36:15,215 INFO L132 encePairwiseOnDemand]: 15/17 looper letters, 0 selfloop transitions, 1 changer transitions 0/14 dead transitions. [2021-08-13 02:36:15,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 14 transitions, 62 flow [2021-08-13 02:36:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2021-08-13 02:36:15,216 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8627450980392157 [2021-08-13 02:36:15,216 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 44 transitions. [2021-08-13 02:36:15,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 44 transitions. [2021-08-13 02:36:15,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:15,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 44 transitions. [2021-08-13 02:36:15,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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) [2021-08-13 02:36:15,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,218 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,218 INFO L348 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2021-08-13 02:36:15,218 INFO L482 AbstractCegarLoop]: Abstraction has has 25 places, 14 transitions, 62 flow [2021-08-13 02:36:15,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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) [2021-08-13 02:36:15,218 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,218 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-13 02:36:15,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-13 02:36:15,219 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1824239762, now seen corresponding path program 1 times [2021-08-13 02:36:15,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277011691] [2021-08-13 02:36:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,224 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,226 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,228 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:15,228 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:15,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-13 02:36:15,228 WARN L235 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:15,228 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-08-13 02:36:15,238 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:15,238 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:15,239 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:15,239 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:15,239 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:15,239 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:15,239 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:15,240 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:15,240 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:15,240 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:15,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 20 transitions, 85 flow [2021-08-13 02:36:15,249 INFO L129 PetriNetUnfolder]: 0/35 cut-off events. [2021-08-13 02:36:15,249 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 35 events. 0/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 111 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-08-13 02:36:15,250 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 20 transitions, 85 flow [2021-08-13 02:36:15,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 18 transitions, 81 flow [2021-08-13 02:36:15,251 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:15,251 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,251 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,251 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:15,252 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,252 INFO L82 PathProgramCache]: Analyzing trace with hash 3299, now seen corresponding path program 1 times [2021-08-13 02:36:15,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558553118] [2021-08-13 02:36:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:15,264 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:15,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:15,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:15,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558553118] [2021-08-13 02:36:15,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558553118] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:15,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:15,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:15,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138141524] [2021-08-13 02:36:15,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:15,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:15,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:15,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:15,275 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 20 [2021-08-13 02:36:15,276 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:15,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 20 [2021-08-13 02:36:15,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:15,281 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-08-13 02:36:15,281 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 6/23 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-08-13 02:36:15,281 INFO L132 encePairwiseOnDemand]: 18/20 looper letters, 0 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2021-08-13 02:36:15,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 17 transitions, 81 flow [2021-08-13 02:36:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:15,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:15,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2021-08-13 02:36:15,282 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8833333333333333 [2021-08-13 02:36:15,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 53 transitions. [2021-08-13 02:36:15,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 53 transitions. [2021-08-13 02:36:15,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:15,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 53 transitions. [2021-08-13 02:36:15,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,288 INFO L348 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2021-08-13 02:36:15,288 INFO L482 AbstractCegarLoop]: Abstraction has has 30 places, 17 transitions, 81 flow [2021-08-13 02:36:15,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,289 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,289 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:15,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-13 02:36:15,289 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,290 INFO L82 PathProgramCache]: Analyzing trace with hash 504182917, now seen corresponding path program 1 times [2021-08-13 02:36:15,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681221423] [2021-08-13 02:36:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,306 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,315 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,317 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:15,317 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:15,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-13 02:36:15,318 WARN L235 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:15,318 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-08-13 02:36:15,342 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:15,342 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:15,343 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:15,343 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:15,344 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:15,344 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:15,344 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:15,344 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:15,344 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:15,344 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:15,345 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 23 transitions, 106 flow [2021-08-13 02:36:15,352 INFO L129 PetriNetUnfolder]: 0/41 cut-off events. [2021-08-13 02:36:15,352 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 136 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-08-13 02:36:15,352 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 23 transitions, 106 flow [2021-08-13 02:36:15,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 21 transitions, 102 flow [2021-08-13 02:36:15,354 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:15,354 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,354 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,354 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:15,354 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,355 INFO L82 PathProgramCache]: Analyzing trace with hash 4035, now seen corresponding path program 1 times [2021-08-13 02:36:15,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319498911] [2021-08-13 02:36:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:15,383 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:15,384 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:15,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:15,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319498911] [2021-08-13 02:36:15,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319498911] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:15,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:15,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:15,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124879556] [2021-08-13 02:36:15,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:15,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:15,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:15,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:15,391 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 23 [2021-08-13 02:36:15,391 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 21 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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) [2021-08-13 02:36:15,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:15,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 23 [2021-08-13 02:36:15,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:15,397 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-08-13 02:36:15,397 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 20 events. 0/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 7/27 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-08-13 02:36:15,397 INFO L132 encePairwiseOnDemand]: 21/23 looper letters, 0 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2021-08-13 02:36:15,397 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 20 transitions, 102 flow [2021-08-13 02:36:15,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:15,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:15,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2021-08-13 02:36:15,398 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8985507246376812 [2021-08-13 02:36:15,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 62 transitions. [2021-08-13 02:36:15,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 62 transitions. [2021-08-13 02:36:15,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:15,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 62 transitions. [2021-08-13 02:36:15,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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) [2021-08-13 02:36:15,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,400 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2021-08-13 02:36:15,400 INFO L482 AbstractCegarLoop]: Abstraction has has 35 places, 20 transitions, 102 flow [2021-08-13 02:36:15,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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) [2021-08-13 02:36:15,401 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,401 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:15,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-13 02:36:15,401 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1332075505, now seen corresponding path program 1 times [2021-08-13 02:36:15,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229610317] [2021-08-13 02:36:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,412 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,426 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,429 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:15,429 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:15,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-13 02:36:15,430 WARN L235 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:15,430 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-08-13 02:36:15,452 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:15,452 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:15,453 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:15,453 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:15,453 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:15,453 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:15,453 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:15,453 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:15,453 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:15,453 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:15,454 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 41 places, 26 transitions, 129 flow [2021-08-13 02:36:15,463 INFO L129 PetriNetUnfolder]: 0/47 cut-off events. [2021-08-13 02:36:15,463 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,463 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 166 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-08-13 02:36:15,463 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 26 transitions, 129 flow [2021-08-13 02:36:15,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 24 transitions, 125 flow [2021-08-13 02:36:15,465 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:15,465 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,465 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,465 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:15,466 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,466 INFO L82 PathProgramCache]: Analyzing trace with hash 4867, now seen corresponding path program 1 times [2021-08-13 02:36:15,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969937] [2021-08-13 02:36:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:15,472 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:15,472 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:15,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:15,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969937] [2021-08-13 02:36:15,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969937] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:15,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:15,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:15,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311729510] [2021-08-13 02:36:15,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:15,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:15,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:15,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:15,478 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 26 [2021-08-13 02:36:15,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 24 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:15,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 26 [2021-08-13 02:36:15,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:15,485 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-08-13 02:36:15,485 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 23 events. 0/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 8/31 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-08-13 02:36:15,485 INFO L132 encePairwiseOnDemand]: 24/26 looper letters, 0 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2021-08-13 02:36:15,485 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 23 transitions, 125 flow [2021-08-13 02:36:15,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:15,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2021-08-13 02:36:15,486 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9102564102564102 [2021-08-13 02:36:15,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 71 transitions. [2021-08-13 02:36:15,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 71 transitions. [2021-08-13 02:36:15,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:15,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 71 transitions. [2021-08-13 02:36:15,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,489 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,489 INFO L348 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2021-08-13 02:36:15,489 INFO L482 AbstractCegarLoop]: Abstraction has has 40 places, 23 transitions, 125 flow [2021-08-13 02:36:15,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,489 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,489 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:15,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-13 02:36:15,490 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,490 INFO L82 PathProgramCache]: Analyzing trace with hash 58177429, now seen corresponding path program 1 times [2021-08-13 02:36:15,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686588300] [2021-08-13 02:36:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,494 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,497 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,498 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:15,499 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:15,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-13 02:36:15,499 WARN L235 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:15,499 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2021-08-13 02:36:15,525 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:15,525 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:15,526 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:15,526 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:15,526 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:15,527 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:15,527 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:15,527 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:15,527 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:15,527 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:15,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 46 places, 29 transitions, 154 flow [2021-08-13 02:36:15,540 INFO L129 PetriNetUnfolder]: 0/53 cut-off events. [2021-08-13 02:36:15,540 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 53 events. 0/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 191 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2021-08-13 02:36:15,541 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 29 transitions, 154 flow [2021-08-13 02:36:15,541 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 27 transitions, 150 flow [2021-08-13 02:36:15,542 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:15,542 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,542 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,542 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:15,543 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,543 INFO L82 PathProgramCache]: Analyzing trace with hash 5795, now seen corresponding path program 1 times [2021-08-13 02:36:15,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352367906] [2021-08-13 02:36:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:15,552 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:15,552 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:15,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:15,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352367906] [2021-08-13 02:36:15,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352367906] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:15,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:15,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:15,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384256654] [2021-08-13 02:36:15,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:15,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:15,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:15,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:15,559 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 29 [2021-08-13 02:36:15,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:15,559 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 29 [2021-08-13 02:36:15,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:15,582 INFO L129 PetriNetUnfolder]: 0/26 cut-off events. [2021-08-13 02:36:15,582 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 26 events. 0/26 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 44 event pairs, 0 based on Foata normal form. 9/35 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2021-08-13 02:36:15,583 INFO L132 encePairwiseOnDemand]: 27/29 looper letters, 0 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2021-08-13 02:36:15,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 26 transitions, 150 flow [2021-08-13 02:36:15,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:15,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:15,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2021-08-13 02:36:15,588 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9195402298850575 [2021-08-13 02:36:15,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 80 transitions. [2021-08-13 02:36:15,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 80 transitions. [2021-08-13 02:36:15,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:15,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 80 transitions. [2021-08-13 02:36:15,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,590 INFO L348 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2021-08-13 02:36:15,590 INFO L482 AbstractCegarLoop]: Abstraction has has 45 places, 26 transitions, 150 flow [2021-08-13 02:36:15,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,591 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,591 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:15,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-13 02:36:15,591 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1055505844, now seen corresponding path program 1 times [2021-08-13 02:36:15,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756356878] [2021-08-13 02:36:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,595 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,598 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,599 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:15,600 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:15,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-13 02:36:15,600 WARN L235 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:15,600 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2021-08-13 02:36:15,612 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:15,613 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:15,614 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:15,614 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:15,614 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:15,614 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:15,614 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:15,614 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:15,614 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:15,614 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:15,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 51 places, 32 transitions, 181 flow [2021-08-13 02:36:15,623 INFO L129 PetriNetUnfolder]: 0/59 cut-off events. [2021-08-13 02:36:15,623 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 59 events. 0/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 216 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2021-08-13 02:36:15,623 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 32 transitions, 181 flow [2021-08-13 02:36:15,624 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 30 transitions, 177 flow [2021-08-13 02:36:15,624 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:15,624 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,625 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,625 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:15,625 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,625 INFO L82 PathProgramCache]: Analyzing trace with hash 6819, now seen corresponding path program 1 times [2021-08-13 02:36:15,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241816561] [2021-08-13 02:36:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:15,630 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:15,630 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:15,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:15,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241816561] [2021-08-13 02:36:15,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241816561] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:15,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:15,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:15,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652351972] [2021-08-13 02:36:15,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:15,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:15,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:15,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:15,635 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 32 [2021-08-13 02:36:15,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 30 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:15,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 32 [2021-08-13 02:36:15,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:15,641 INFO L129 PetriNetUnfolder]: 0/29 cut-off events. [2021-08-13 02:36:15,641 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 10/39 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2021-08-13 02:36:15,642 INFO L132 encePairwiseOnDemand]: 30/32 looper letters, 0 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2021-08-13 02:36:15,642 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 29 transitions, 177 flow [2021-08-13 02:36:15,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:15,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:15,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2021-08-13 02:36:15,643 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9270833333333334 [2021-08-13 02:36:15,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 89 transitions. [2021-08-13 02:36:15,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 89 transitions. [2021-08-13 02:36:15,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:15,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 89 transitions. [2021-08-13 02:36:15,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,644 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,645 INFO L348 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2021-08-13 02:36:15,645 INFO L482 AbstractCegarLoop]: Abstraction has has 50 places, 29 transitions, 177 flow [2021-08-13 02:36:15,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,645 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,645 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:15,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-13 02:36:15,645 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1814808561, now seen corresponding path program 1 times [2021-08-13 02:36:15,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032330933] [2021-08-13 02:36:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,650 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,652 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,654 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:15,654 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:15,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-13 02:36:15,655 WARN L235 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:15,655 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2021-08-13 02:36:15,668 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:15,669 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:15,669 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:15,669 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:15,670 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:15,670 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:15,670 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:15,670 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:15,670 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:15,670 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:15,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 56 places, 35 transitions, 210 flow [2021-08-13 02:36:15,682 INFO L129 PetriNetUnfolder]: 0/65 cut-off events. [2021-08-13 02:36:15,682 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,682 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 65 events. 0/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 234 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2021-08-13 02:36:15,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 35 transitions, 210 flow [2021-08-13 02:36:15,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 33 transitions, 206 flow [2021-08-13 02:36:15,683 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:15,683 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,683 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,684 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:15,684 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,684 INFO L82 PathProgramCache]: Analyzing trace with hash 7939, now seen corresponding path program 1 times [2021-08-13 02:36:15,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313223805] [2021-08-13 02:36:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:15,689 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:15,690 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:15,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:15,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313223805] [2021-08-13 02:36:15,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313223805] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:15,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:15,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:15,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695409541] [2021-08-13 02:36:15,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:15,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:15,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:15,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:15,694 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 35 [2021-08-13 02:36:15,694 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 33 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:15,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 35 [2021-08-13 02:36:15,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:15,700 INFO L129 PetriNetUnfolder]: 0/32 cut-off events. [2021-08-13 02:36:15,700 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 32 events. 0/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 11/43 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2021-08-13 02:36:15,701 INFO L132 encePairwiseOnDemand]: 33/35 looper letters, 0 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2021-08-13 02:36:15,701 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 32 transitions, 206 flow [2021-08-13 02:36:15,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:15,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:15,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2021-08-13 02:36:15,701 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9333333333333333 [2021-08-13 02:36:15,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 98 transitions. [2021-08-13 02:36:15,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 98 transitions. [2021-08-13 02:36:15,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:15,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 98 transitions. [2021-08-13 02:36:15,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,703 INFO L348 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2021-08-13 02:36:15,703 INFO L482 AbstractCegarLoop]: Abstraction has has 55 places, 32 transitions, 206 flow [2021-08-13 02:36:15,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,704 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,704 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:15,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-13 02:36:15,704 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1379283255, now seen corresponding path program 1 times [2021-08-13 02:36:15,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806030505] [2021-08-13 02:36:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,709 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,712 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,714 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:15,714 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:15,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-13 02:36:15,715 WARN L235 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:15,715 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2021-08-13 02:36:15,740 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:15,741 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:15,742 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:15,742 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:15,742 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:15,742 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:15,742 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:15,742 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:15,742 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:15,742 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:15,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 61 places, 38 transitions, 241 flow [2021-08-13 02:36:15,766 INFO L129 PetriNetUnfolder]: 0/71 cut-off events. [2021-08-13 02:36:15,766 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 71 events. 0/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 257 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-08-13 02:36:15,766 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 38 transitions, 241 flow [2021-08-13 02:36:15,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 36 transitions, 237 flow [2021-08-13 02:36:15,768 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:15,768 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,768 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,768 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:15,768 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash 9155, now seen corresponding path program 1 times [2021-08-13 02:36:15,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689319388] [2021-08-13 02:36:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:15,779 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:15,779 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:15,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:15,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689319388] [2021-08-13 02:36:15,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689319388] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:15,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:15,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:15,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432544385] [2021-08-13 02:36:15,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:15,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:15,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:15,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:15,784 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 38 [2021-08-13 02:36:15,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 36 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:15,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 38 [2021-08-13 02:36:15,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:15,813 INFO L129 PetriNetUnfolder]: 0/35 cut-off events. [2021-08-13 02:36:15,813 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,813 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 35 events. 0/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 12/47 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-08-13 02:36:15,813 INFO L132 encePairwiseOnDemand]: 36/38 looper letters, 0 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2021-08-13 02:36:15,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 35 transitions, 237 flow [2021-08-13 02:36:15,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2021-08-13 02:36:15,814 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9385964912280702 [2021-08-13 02:36:15,814 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2021-08-13 02:36:15,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2021-08-13 02:36:15,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:15,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2021-08-13 02:36:15,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,816 INFO L348 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2021-08-13 02:36:15,816 INFO L482 AbstractCegarLoop]: Abstraction has has 60 places, 35 transitions, 237 flow [2021-08-13 02:36:15,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,816 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,816 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:15,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-13 02:36:15,817 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,817 INFO L82 PathProgramCache]: Analyzing trace with hash -279163623, now seen corresponding path program 1 times [2021-08-13 02:36:15,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999762741] [2021-08-13 02:36:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,822 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,824 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,826 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:15,826 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:15,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-13 02:36:15,826 WARN L235 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:15,826 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2021-08-13 02:36:15,841 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:15,842 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:15,842 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:15,842 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:15,843 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:15,843 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:15,843 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:15,843 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:15,843 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:15,843 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:15,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 41 transitions, 274 flow [2021-08-13 02:36:15,850 INFO L129 PetriNetUnfolder]: 0/77 cut-off events. [2021-08-13 02:36:15,851 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 77 events. 0/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 280 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-08-13 02:36:15,851 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 41 transitions, 274 flow [2021-08-13 02:36:15,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 39 transitions, 270 flow [2021-08-13 02:36:15,852 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:15,852 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,852 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,852 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:15,852 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,853 INFO L82 PathProgramCache]: Analyzing trace with hash 10467, now seen corresponding path program 1 times [2021-08-13 02:36:15,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161586471] [2021-08-13 02:36:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:15,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:15,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:15,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:15,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161586471] [2021-08-13 02:36:15,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161586471] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:15,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:15,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:15,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748456302] [2021-08-13 02:36:15,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:15,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:15,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:15,862 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 41 [2021-08-13 02:36:15,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:15,862 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 41 [2021-08-13 02:36:15,862 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:15,868 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-08-13 02:36:15,868 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 13/51 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-08-13 02:36:15,869 INFO L132 encePairwiseOnDemand]: 39/41 looper letters, 0 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2021-08-13 02:36:15,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 38 transitions, 270 flow [2021-08-13 02:36:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:15,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2021-08-13 02:36:15,869 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.943089430894309 [2021-08-13 02:36:15,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 116 transitions. [2021-08-13 02:36:15,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 116 transitions. [2021-08-13 02:36:15,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:15,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 116 transitions. [2021-08-13 02:36:15,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,871 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,871 INFO L348 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2021-08-13 02:36:15,871 INFO L482 AbstractCegarLoop]: Abstraction has has 65 places, 38 transitions, 270 flow [2021-08-13 02:36:15,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,871 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,872 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:15,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-13 02:36:15,872 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,872 INFO L82 PathProgramCache]: Analyzing trace with hash 387658490, now seen corresponding path program 1 times [2021-08-13 02:36:15,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398806799] [2021-08-13 02:36:15,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,877 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,880 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,882 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:15,882 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:15,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-13 02:36:15,882 WARN L235 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:15,882 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2021-08-13 02:36:15,898 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:15,898 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:15,899 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:15,899 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:15,899 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:15,899 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:15,899 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:15,899 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:15,899 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:15,899 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:15,900 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 71 places, 44 transitions, 309 flow [2021-08-13 02:36:15,908 INFO L129 PetriNetUnfolder]: 0/83 cut-off events. [2021-08-13 02:36:15,908 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,909 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 83 events. 0/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 309 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 0. Up to 14 conditions per place. [2021-08-13 02:36:15,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 44 transitions, 309 flow [2021-08-13 02:36:15,909 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 42 transitions, 305 flow [2021-08-13 02:36:15,910 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:15,910 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,910 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,910 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:15,910 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,911 INFO L82 PathProgramCache]: Analyzing trace with hash 11875, now seen corresponding path program 1 times [2021-08-13 02:36:15,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30540711] [2021-08-13 02:36:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:15,921 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:15,921 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:15,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:15,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30540711] [2021-08-13 02:36:15,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30540711] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:15,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:15,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:15,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434741432] [2021-08-13 02:36:15,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:15,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:15,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:15,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:15,925 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 44 [2021-08-13 02:36:15,925 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 42 transitions, 305 flow. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,925 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:15,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 44 [2021-08-13 02:36:15,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:15,932 INFO L129 PetriNetUnfolder]: 0/41 cut-off events. [2021-08-13 02:36:15,932 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:15,932 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 14/55 useless extension candidates. Maximal degree in co-relation 0. Up to 14 conditions per place. [2021-08-13 02:36:15,932 INFO L132 encePairwiseOnDemand]: 42/44 looper letters, 0 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2021-08-13 02:36:15,932 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 41 transitions, 305 flow [2021-08-13 02:36:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:15,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2021-08-13 02:36:15,933 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.946969696969697 [2021-08-13 02:36:15,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2021-08-13 02:36:15,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2021-08-13 02:36:15,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:15,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2021-08-13 02:36:15,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,934 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,935 INFO L348 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2021-08-13 02:36:15,935 INFO L482 AbstractCegarLoop]: Abstraction has has 70 places, 41 transitions, 305 flow [2021-08-13 02:36:15,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:15,935 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:15,935 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:15,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-13 02:36:15,935 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:15,941 INFO L82 PathProgramCache]: Analyzing trace with hash -656774515, now seen corresponding path program 1 times [2021-08-13 02:36:15,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:15,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471298199] [2021-08-13 02:36:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,957 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:15,960 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:15,962 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:15,962 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:15,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-13 02:36:15,962 WARN L235 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:15,962 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2021-08-13 02:36:16,023 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:16,024 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:16,028 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:16,028 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:16,028 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:16,028 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:16,028 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:16,028 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:16,028 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:16,028 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:16,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 76 places, 47 transitions, 346 flow [2021-08-13 02:36:16,042 INFO L129 PetriNetUnfolder]: 0/89 cut-off events. [2021-08-13 02:36:16,042 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 89 events. 0/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 343 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2021-08-13 02:36:16,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 47 transitions, 346 flow [2021-08-13 02:36:16,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 45 transitions, 342 flow [2021-08-13 02:36:16,044 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:16,044 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,044 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,051 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:16,051 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,052 INFO L82 PathProgramCache]: Analyzing trace with hash 13379, now seen corresponding path program 1 times [2021-08-13 02:36:16,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435073925] [2021-08-13 02:36:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:16,063 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:16,063 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:16,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:16,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435073925] [2021-08-13 02:36:16,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435073925] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:16,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:16,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:16,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434470082] [2021-08-13 02:36:16,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:16,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:16,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:16,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:16,070 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 47 [2021-08-13 02:36:16,070 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 45 transitions, 342 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,070 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:16,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 47 [2021-08-13 02:36:16,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:16,083 INFO L129 PetriNetUnfolder]: 0/44 cut-off events. [2021-08-13 02:36:16,083 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 44 events. 0/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 15/59 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2021-08-13 02:36:16,085 INFO L132 encePairwiseOnDemand]: 45/47 looper letters, 0 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2021-08-13 02:36:16,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 44 transitions, 342 flow [2021-08-13 02:36:16,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2021-08-13 02:36:16,087 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.950354609929078 [2021-08-13 02:36:16,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 134 transitions. [2021-08-13 02:36:16,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 134 transitions. [2021-08-13 02:36:16,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:16,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 134 transitions. [2021-08-13 02:36:16,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,092 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,092 INFO L348 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2021-08-13 02:36:16,092 INFO L482 AbstractCegarLoop]: Abstraction has has 75 places, 44 transitions, 342 flow [2021-08-13 02:36:16,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,093 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,093 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:16,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-13 02:36:16,093 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,094 INFO L82 PathProgramCache]: Analyzing trace with hash 910327677, now seen corresponding path program 1 times [2021-08-13 02:36:16,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240301961] [2021-08-13 02:36:16,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,113 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,116 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,119 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:16,119 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:16,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-13 02:36:16,119 WARN L235 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:16,119 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2021-08-13 02:36:16,146 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:16,146 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:16,147 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:16,147 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:16,147 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:16,147 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:16,147 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:16,147 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:16,147 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:16,147 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:16,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 81 places, 50 transitions, 385 flow [2021-08-13 02:36:16,163 INFO L129 PetriNetUnfolder]: 0/95 cut-off events. [2021-08-13 02:36:16,164 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 95 events. 0/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 298 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 0. Up to 16 conditions per place. [2021-08-13 02:36:16,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 50 transitions, 385 flow [2021-08-13 02:36:16,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 48 transitions, 381 flow [2021-08-13 02:36:16,168 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:16,168 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,168 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,168 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:16,168 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,169 INFO L82 PathProgramCache]: Analyzing trace with hash 14979, now seen corresponding path program 1 times [2021-08-13 02:36:16,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491991236] [2021-08-13 02:36:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:16,186 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:16,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:16,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:16,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491991236] [2021-08-13 02:36:16,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491991236] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:16,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:16,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:16,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611994359] [2021-08-13 02:36:16,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:16,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:16,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:16,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:16,192 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 50 [2021-08-13 02:36:16,192 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 48 transitions, 381 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:16,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 50 [2021-08-13 02:36:16,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:16,208 INFO L129 PetriNetUnfolder]: 0/47 cut-off events. [2021-08-13 02:36:16,208 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 16/63 useless extension candidates. Maximal degree in co-relation 0. Up to 16 conditions per place. [2021-08-13 02:36:16,208 INFO L132 encePairwiseOnDemand]: 48/50 looper letters, 0 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2021-08-13 02:36:16,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 47 transitions, 381 flow [2021-08-13 02:36:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:16,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2021-08-13 02:36:16,209 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9533333333333334 [2021-08-13 02:36:16,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2021-08-13 02:36:16,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2021-08-13 02:36:16,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:16,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2021-08-13 02:36:16,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,211 INFO L348 CegarLoopForPetriNet]: 79 programPoint places, 1 predicate places. [2021-08-13 02:36:16,211 INFO L482 AbstractCegarLoop]: Abstraction has has 80 places, 47 transitions, 381 flow [2021-08-13 02:36:16,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,211 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,211 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:16,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-13 02:36:16,211 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,212 INFO L82 PathProgramCache]: Analyzing trace with hash 2024113101, now seen corresponding path program 1 times [2021-08-13 02:36:16,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377202781] [2021-08-13 02:36:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,220 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,230 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,233 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:16,233 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:16,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-13 02:36:16,233 WARN L235 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:16,233 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2021-08-13 02:36:16,295 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:16,295 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:16,296 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:16,296 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:16,296 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:16,296 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:16,296 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:16,296 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:16,296 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:16,296 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:16,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 86 places, 53 transitions, 426 flow [2021-08-13 02:36:16,307 INFO L129 PetriNetUnfolder]: 0/101 cut-off events. [2021-08-13 02:36:16,307 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 101 events. 0/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 329 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2021-08-13 02:36:16,308 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 53 transitions, 426 flow [2021-08-13 02:36:16,308 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 51 transitions, 422 flow [2021-08-13 02:36:16,309 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:16,309 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,309 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,309 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:16,309 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,309 INFO L82 PathProgramCache]: Analyzing trace with hash 16675, now seen corresponding path program 1 times [2021-08-13 02:36:16,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231144880] [2021-08-13 02:36:16,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:16,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:16,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:16,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:16,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231144880] [2021-08-13 02:36:16,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231144880] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:16,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:16,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:16,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109084686] [2021-08-13 02:36:16,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:16,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:16,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:16,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:16,335 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 53 [2021-08-13 02:36:16,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 51 transitions, 422 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,335 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:16,336 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 53 [2021-08-13 02:36:16,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:16,348 INFO L129 PetriNetUnfolder]: 0/50 cut-off events. [2021-08-13 02:36:16,348 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 94 event pairs, 0 based on Foata normal form. 17/67 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2021-08-13 02:36:16,348 INFO L132 encePairwiseOnDemand]: 51/53 looper letters, 0 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2021-08-13 02:36:16,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 50 transitions, 422 flow [2021-08-13 02:36:16,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:16,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:16,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2021-08-13 02:36:16,349 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9559748427672956 [2021-08-13 02:36:16,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 152 transitions. [2021-08-13 02:36:16,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 152 transitions. [2021-08-13 02:36:16,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:16,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 152 transitions. [2021-08-13 02:36:16,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,351 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,351 INFO L348 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2021-08-13 02:36:16,351 INFO L482 AbstractCegarLoop]: Abstraction has has 85 places, 50 transitions, 422 flow [2021-08-13 02:36:16,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,352 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,352 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:16,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-13 02:36:16,352 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,352 INFO L82 PathProgramCache]: Analyzing trace with hash 916427584, now seen corresponding path program 1 times [2021-08-13 02:36:16,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656889183] [2021-08-13 02:36:16,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,367 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,375 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,378 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:16,378 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:16,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-13 02:36:16,379 WARN L235 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:16,379 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2021-08-13 02:36:16,404 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:16,404 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:16,406 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:16,406 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:16,406 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:16,406 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:16,406 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:16,407 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:16,407 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:16,407 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:16,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 91 places, 56 transitions, 469 flow [2021-08-13 02:36:16,420 INFO L129 PetriNetUnfolder]: 0/107 cut-off events. [2021-08-13 02:36:16,421 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,421 INFO L84 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 107 events. 0/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 351 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-08-13 02:36:16,421 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 56 transitions, 469 flow [2021-08-13 02:36:16,422 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 54 transitions, 465 flow [2021-08-13 02:36:16,422 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:16,422 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,422 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,422 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:16,422 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,423 INFO L82 PathProgramCache]: Analyzing trace with hash 18467, now seen corresponding path program 1 times [2021-08-13 02:36:16,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835568662] [2021-08-13 02:36:16,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:16,430 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:16,438 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:16,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:16,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835568662] [2021-08-13 02:36:16,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835568662] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:16,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:16,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:16,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363194188] [2021-08-13 02:36:16,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:16,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:16,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:16,443 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 56 [2021-08-13 02:36:16,443 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 54 transitions, 465 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,443 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:16,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 56 [2021-08-13 02:36:16,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:16,457 INFO L129 PetriNetUnfolder]: 0/53 cut-off events. [2021-08-13 02:36:16,458 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 53 events. 0/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 105 event pairs, 0 based on Foata normal form. 18/71 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-08-13 02:36:16,458 INFO L132 encePairwiseOnDemand]: 54/56 looper letters, 0 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2021-08-13 02:36:16,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 53 transitions, 465 flow [2021-08-13 02:36:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2021-08-13 02:36:16,459 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9583333333333334 [2021-08-13 02:36:16,460 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2021-08-13 02:36:16,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2021-08-13 02:36:16,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:16,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2021-08-13 02:36:16,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,462 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,462 INFO L348 CegarLoopForPetriNet]: 89 programPoint places, 1 predicate places. [2021-08-13 02:36:16,462 INFO L482 AbstractCegarLoop]: Abstraction has has 90 places, 53 transitions, 465 flow [2021-08-13 02:36:16,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,463 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,463 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:16,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-13 02:36:16,463 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1820015705, now seen corresponding path program 1 times [2021-08-13 02:36:16,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137382273] [2021-08-13 02:36:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,476 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,485 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,492 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:16,492 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:16,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-08-13 02:36:16,493 WARN L235 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:16,493 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2021-08-13 02:36:16,519 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:16,520 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:16,521 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:16,521 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:16,521 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:16,521 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:16,521 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:16,521 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:16,521 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:16,521 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:16,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 59 transitions, 514 flow [2021-08-13 02:36:16,536 INFO L129 PetriNetUnfolder]: 0/113 cut-off events. [2021-08-13 02:36:16,536 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,536 INFO L84 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 113 events. 0/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 365 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2021-08-13 02:36:16,536 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 59 transitions, 514 flow [2021-08-13 02:36:16,538 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 57 transitions, 510 flow [2021-08-13 02:36:16,538 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:16,538 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,539 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,539 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:16,539 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,539 INFO L82 PathProgramCache]: Analyzing trace with hash 20355, now seen corresponding path program 1 times [2021-08-13 02:36:16,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454684525] [2021-08-13 02:36:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:16,548 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:16,548 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:16,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:16,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454684525] [2021-08-13 02:36:16,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454684525] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:16,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:16,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:16,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026664767] [2021-08-13 02:36:16,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:16,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:16,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:16,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:16,553 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 59 [2021-08-13 02:36:16,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 57 transitions, 510 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:16,554 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 59 [2021-08-13 02:36:16,554 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:16,565 INFO L129 PetriNetUnfolder]: 0/56 cut-off events. [2021-08-13 02:36:16,565 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 56 events. 0/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 19/75 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2021-08-13 02:36:16,566 INFO L132 encePairwiseOnDemand]: 57/59 looper letters, 0 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2021-08-13 02:36:16,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 56 transitions, 510 flow [2021-08-13 02:36:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:16,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2021-08-13 02:36:16,567 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.96045197740113 [2021-08-13 02:36:16,567 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 170 transitions. [2021-08-13 02:36:16,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 170 transitions. [2021-08-13 02:36:16,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:16,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 170 transitions. [2021-08-13 02:36:16,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,569 INFO L348 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2021-08-13 02:36:16,569 INFO L482 AbstractCegarLoop]: Abstraction has has 95 places, 56 transitions, 510 flow [2021-08-13 02:36:16,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,569 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,569 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:16,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-08-13 02:36:16,570 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,570 INFO L82 PathProgramCache]: Analyzing trace with hash 115321539, now seen corresponding path program 1 times [2021-08-13 02:36:16,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413141063] [2021-08-13 02:36:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,588 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,593 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,599 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:16,599 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:16,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-08-13 02:36:16,600 WARN L235 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:16,600 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2021-08-13 02:36:16,625 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:16,625 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:16,626 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:16,626 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:16,626 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:16,626 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:16,626 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:16,626 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:16,626 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:16,626 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:16,627 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 101 places, 62 transitions, 561 flow [2021-08-13 02:36:16,638 INFO L129 PetriNetUnfolder]: 0/119 cut-off events. [2021-08-13 02:36:16,638 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,638 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 119 events. 0/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 376 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 0. Up to 20 conditions per place. [2021-08-13 02:36:16,638 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 62 transitions, 561 flow [2021-08-13 02:36:16,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 60 transitions, 557 flow [2021-08-13 02:36:16,639 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:16,639 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,639 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,640 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:16,640 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,640 INFO L82 PathProgramCache]: Analyzing trace with hash 22339, now seen corresponding path program 1 times [2021-08-13 02:36:16,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150878154] [2021-08-13 02:36:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:16,647 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:16,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:16,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:16,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150878154] [2021-08-13 02:36:16,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150878154] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:16,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:16,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:16,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794792941] [2021-08-13 02:36:16,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:16,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:16,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:16,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:16,654 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 62 [2021-08-13 02:36:16,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 60 transitions, 557 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:16,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 62 [2021-08-13 02:36:16,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:16,665 INFO L129 PetriNetUnfolder]: 0/59 cut-off events. [2021-08-13 02:36:16,665 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 59 events. 0/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 107 event pairs, 0 based on Foata normal form. 20/79 useless extension candidates. Maximal degree in co-relation 0. Up to 20 conditions per place. [2021-08-13 02:36:16,665 INFO L132 encePairwiseOnDemand]: 60/62 looper letters, 0 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2021-08-13 02:36:16,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 59 transitions, 557 flow [2021-08-13 02:36:16,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:16,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2021-08-13 02:36:16,666 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9623655913978495 [2021-08-13 02:36:16,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 179 transitions. [2021-08-13 02:36:16,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 179 transitions. [2021-08-13 02:36:16,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:16,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 179 transitions. [2021-08-13 02:36:16,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,667 INFO L348 CegarLoopForPetriNet]: 99 programPoint places, 1 predicate places. [2021-08-13 02:36:16,668 INFO L482 AbstractCegarLoop]: Abstraction has has 100 places, 59 transitions, 557 flow [2021-08-13 02:36:16,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,668 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,668 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:16,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-08-13 02:36:16,668 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1667725233, now seen corresponding path program 1 times [2021-08-13 02:36:16,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43610975] [2021-08-13 02:36:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,677 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,678 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,686 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:16,686 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:16,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-13 02:36:16,686 WARN L235 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:16,686 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2021-08-13 02:36:16,710 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:16,710 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:16,711 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:16,711 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:16,711 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:16,711 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:16,711 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:16,711 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:16,711 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:16,711 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:16,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 106 places, 65 transitions, 610 flow [2021-08-13 02:36:16,725 INFO L129 PetriNetUnfolder]: 0/125 cut-off events. [2021-08-13 02:36:16,725 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 125 events. 0/125 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 409 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2021-08-13 02:36:16,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 65 transitions, 610 flow [2021-08-13 02:36:16,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 63 transitions, 606 flow [2021-08-13 02:36:16,727 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:16,728 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,728 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,728 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:16,728 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,728 INFO L82 PathProgramCache]: Analyzing trace with hash 24419, now seen corresponding path program 1 times [2021-08-13 02:36:16,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184953593] [2021-08-13 02:36:16,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:16,737 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:16,738 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:16,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:16,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184953593] [2021-08-13 02:36:16,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184953593] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:16,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:16,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:16,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705387954] [2021-08-13 02:36:16,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:16,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:16,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:16,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:16,742 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 65 [2021-08-13 02:36:16,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 63 transitions, 606 flow. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:16,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 65 [2021-08-13 02:36:16,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:16,754 INFO L129 PetriNetUnfolder]: 0/62 cut-off events. [2021-08-13 02:36:16,754 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 62 events. 0/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 21/83 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2021-08-13 02:36:16,755 INFO L132 encePairwiseOnDemand]: 63/65 looper letters, 0 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2021-08-13 02:36:16,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 62 transitions, 606 flow [2021-08-13 02:36:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:16,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2021-08-13 02:36:16,756 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9641025641025641 [2021-08-13 02:36:16,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2021-08-13 02:36:16,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2021-08-13 02:36:16,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:16,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2021-08-13 02:36:16,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 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) [2021-08-13 02:36:16,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 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) [2021-08-13 02:36:16,757 INFO L348 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2021-08-13 02:36:16,757 INFO L482 AbstractCegarLoop]: Abstraction has has 105 places, 62 transitions, 606 flow [2021-08-13 02:36:16,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,758 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,758 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:16,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-08-13 02:36:16,758 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,758 INFO L82 PathProgramCache]: Analyzing trace with hash -858144122, now seen corresponding path program 1 times [2021-08-13 02:36:16,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394997095] [2021-08-13 02:36:16,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,763 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,764 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,767 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:16,767 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:16,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-08-13 02:36:16,768 WARN L235 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:16,768 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2021-08-13 02:36:16,790 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:16,790 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:16,791 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:16,791 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:16,791 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:16,791 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:16,791 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:16,791 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:16,791 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:16,791 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:16,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 111 places, 68 transitions, 661 flow [2021-08-13 02:36:16,804 INFO L129 PetriNetUnfolder]: 0/131 cut-off events. [2021-08-13 02:36:16,805 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 131 events. 0/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 413 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 0. Up to 22 conditions per place. [2021-08-13 02:36:16,805 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 68 transitions, 661 flow [2021-08-13 02:36:16,806 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 66 transitions, 657 flow [2021-08-13 02:36:16,806 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:16,806 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,806 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,806 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:16,806 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,807 INFO L82 PathProgramCache]: Analyzing trace with hash 26595, now seen corresponding path program 1 times [2021-08-13 02:36:16,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842306660] [2021-08-13 02:36:16,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:16,813 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:16,813 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:16,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:16,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842306660] [2021-08-13 02:36:16,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842306660] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:16,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:16,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:16,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885442605] [2021-08-13 02:36:16,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:16,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:16,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:16,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:16,817 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 68 [2021-08-13 02:36:16,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 66 transitions, 657 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:16,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 68 [2021-08-13 02:36:16,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:16,827 INFO L129 PetriNetUnfolder]: 0/65 cut-off events. [2021-08-13 02:36:16,827 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 65 events. 0/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 135 event pairs, 0 based on Foata normal form. 22/87 useless extension candidates. Maximal degree in co-relation 0. Up to 22 conditions per place. [2021-08-13 02:36:16,828 INFO L132 encePairwiseOnDemand]: 66/68 looper letters, 0 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2021-08-13 02:36:16,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 65 transitions, 657 flow [2021-08-13 02:36:16,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:16,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2021-08-13 02:36:16,828 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9656862745098039 [2021-08-13 02:36:16,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2021-08-13 02:36:16,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2021-08-13 02:36:16,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:16,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2021-08-13 02:36:16,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,830 INFO L348 CegarLoopForPetriNet]: 109 programPoint places, 1 predicate places. [2021-08-13 02:36:16,830 INFO L482 AbstractCegarLoop]: Abstraction has has 110 places, 65 transitions, 657 flow [2021-08-13 02:36:16,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,830 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,831 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:16,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-08-13 02:36:16,831 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,831 INFO L82 PathProgramCache]: Analyzing trace with hash -615229099, now seen corresponding path program 1 times [2021-08-13 02:36:16,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057292040] [2021-08-13 02:36:16,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,836 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,837 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,840 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:16,840 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:16,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-08-13 02:36:16,841 WARN L235 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:16,841 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2021-08-13 02:36:16,863 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:16,863 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:16,864 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:16,864 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:16,864 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:16,864 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:16,864 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:16,864 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:16,864 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:16,864 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:16,865 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 116 places, 71 transitions, 714 flow [2021-08-13 02:36:16,886 INFO L129 PetriNetUnfolder]: 0/137 cut-off events. [2021-08-13 02:36:16,886 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,887 INFO L84 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 137 events. 0/137 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 447 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2021-08-13 02:36:16,887 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 71 transitions, 714 flow [2021-08-13 02:36:16,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 69 transitions, 710 flow [2021-08-13 02:36:16,888 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:16,888 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,888 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,889 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:16,889 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,889 INFO L82 PathProgramCache]: Analyzing trace with hash 28867, now seen corresponding path program 1 times [2021-08-13 02:36:16,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511346536] [2021-08-13 02:36:16,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:16,896 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:16,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:16,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:16,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511346536] [2021-08-13 02:36:16,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511346536] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:16,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:16,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:16,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309266185] [2021-08-13 02:36:16,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:16,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:16,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:16,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:16,901 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 71 [2021-08-13 02:36:16,901 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 69 transitions, 710 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,901 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:16,901 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 71 [2021-08-13 02:36:16,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:16,913 INFO L129 PetriNetUnfolder]: 0/68 cut-off events. [2021-08-13 02:36:16,914 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,914 INFO L84 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 68 events. 0/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 129 event pairs, 0 based on Foata normal form. 23/91 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2021-08-13 02:36:16,914 INFO L132 encePairwiseOnDemand]: 69/71 looper letters, 0 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2021-08-13 02:36:16,914 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 68 transitions, 710 flow [2021-08-13 02:36:16,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2021-08-13 02:36:16,915 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9671361502347418 [2021-08-13 02:36:16,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2021-08-13 02:36:16,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2021-08-13 02:36:16,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:16,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2021-08-13 02:36:16,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,917 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,918 INFO L348 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2021-08-13 02:36:16,918 INFO L482 AbstractCegarLoop]: Abstraction has has 115 places, 68 transitions, 710 flow [2021-08-13 02:36:16,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,918 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,918 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:16,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-08-13 02:36:16,918 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2063505161, now seen corresponding path program 1 times [2021-08-13 02:36:16,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921587309] [2021-08-13 02:36:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,923 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:16,925 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:16,930 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:16,931 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:16,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-08-13 02:36:16,931 WARN L235 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:16,931 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2021-08-13 02:36:16,962 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:16,962 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:16,962 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:16,963 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:16,963 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:16,963 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:16,963 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:16,963 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:16,963 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:16,963 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:16,965 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 121 places, 74 transitions, 769 flow [2021-08-13 02:36:16,978 INFO L129 PetriNetUnfolder]: 0/143 cut-off events. [2021-08-13 02:36:16,978 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,979 INFO L84 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 143 events. 0/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 469 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2021-08-13 02:36:16,979 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 74 transitions, 769 flow [2021-08-13 02:36:16,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 72 transitions, 765 flow [2021-08-13 02:36:16,980 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:16,980 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:16,980 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:16,980 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:16,980 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:16,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:16,981 INFO L82 PathProgramCache]: Analyzing trace with hash 31235, now seen corresponding path program 1 times [2021-08-13 02:36:16,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:16,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508903151] [2021-08-13 02:36:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:16,989 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:16,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:16,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:16,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508903151] [2021-08-13 02:36:16,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508903151] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:16,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:16,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:16,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087861717] [2021-08-13 02:36:16,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:16,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:16,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:16,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:16,993 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 74 [2021-08-13 02:36:16,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 72 transitions, 765 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:16,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:16,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 74 [2021-08-13 02:36:16,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:17,004 INFO L129 PetriNetUnfolder]: 0/71 cut-off events. [2021-08-13 02:36:17,005 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 71 events. 0/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 137 event pairs, 0 based on Foata normal form. 24/95 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2021-08-13 02:36:17,005 INFO L132 encePairwiseOnDemand]: 72/74 looper letters, 0 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2021-08-13 02:36:17,005 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 71 transitions, 765 flow [2021-08-13 02:36:17,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2021-08-13 02:36:17,006 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9684684684684685 [2021-08-13 02:36:17,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2021-08-13 02:36:17,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2021-08-13 02:36:17,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:17,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2021-08-13 02:36:17,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,008 INFO L348 CegarLoopForPetriNet]: 119 programPoint places, 1 predicate places. [2021-08-13 02:36:17,008 INFO L482 AbstractCegarLoop]: Abstraction has has 120 places, 71 transitions, 765 flow [2021-08-13 02:36:17,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,008 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,008 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:17,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-08-13 02:36:17,009 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1486505157, now seen corresponding path program 1 times [2021-08-13 02:36:17,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020862403] [2021-08-13 02:36:17,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,016 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,019 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,023 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:17,023 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:17,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-08-13 02:36:17,024 WARN L235 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:17,024 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2021-08-13 02:36:17,047 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:17,048 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:17,048 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:17,048 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:17,048 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:17,048 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:17,048 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:17,048 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:17,049 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:17,049 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:17,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 126 places, 77 transitions, 826 flow [2021-08-13 02:36:17,063 INFO L129 PetriNetUnfolder]: 0/149 cut-off events. [2021-08-13 02:36:17,064 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 149 events. 0/149 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 472 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2021-08-13 02:36:17,064 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 77 transitions, 826 flow [2021-08-13 02:36:17,065 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 75 transitions, 822 flow [2021-08-13 02:36:17,066 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:17,066 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,066 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,066 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:17,066 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,066 INFO L82 PathProgramCache]: Analyzing trace with hash 33699, now seen corresponding path program 1 times [2021-08-13 02:36:17,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961082694] [2021-08-13 02:36:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:17,073 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:17,073 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:17,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:17,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961082694] [2021-08-13 02:36:17,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961082694] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:17,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:17,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:17,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592207425] [2021-08-13 02:36:17,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:17,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:17,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:17,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:17,078 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 77 [2021-08-13 02:36:17,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 75 transitions, 822 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:17,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 77 [2021-08-13 02:36:17,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:17,090 INFO L129 PetriNetUnfolder]: 0/74 cut-off events. [2021-08-13 02:36:17,090 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 74 events. 0/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 147 event pairs, 0 based on Foata normal form. 25/99 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2021-08-13 02:36:17,091 INFO L132 encePairwiseOnDemand]: 75/77 looper letters, 0 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2021-08-13 02:36:17,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 74 transitions, 822 flow [2021-08-13 02:36:17,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:17,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:17,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2021-08-13 02:36:17,092 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9696969696969697 [2021-08-13 02:36:17,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2021-08-13 02:36:17,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2021-08-13 02:36:17,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:17,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2021-08-13 02:36:17,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,094 INFO L348 CegarLoopForPetriNet]: 124 programPoint places, 1 predicate places. [2021-08-13 02:36:17,094 INFO L482 AbstractCegarLoop]: Abstraction has has 125 places, 74 transitions, 822 flow [2021-08-13 02:36:17,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,094 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,094 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:17,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-08-13 02:36:17,095 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1412913972, now seen corresponding path program 1 times [2021-08-13 02:36:17,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418892986] [2021-08-13 02:36:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,101 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,110 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,116 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:17,118 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:17,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-08-13 02:36:17,118 WARN L235 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:17,118 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2021-08-13 02:36:17,142 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:17,143 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:17,143 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:17,143 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:17,143 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:17,143 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:17,143 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:17,143 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:17,143 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:17,143 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:17,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 131 places, 80 transitions, 885 flow [2021-08-13 02:36:17,159 INFO L129 PetriNetUnfolder]: 0/155 cut-off events. [2021-08-13 02:36:17,160 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 155 events. 0/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 522 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 0. Up to 26 conditions per place. [2021-08-13 02:36:17,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 80 transitions, 885 flow [2021-08-13 02:36:17,161 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 78 transitions, 881 flow [2021-08-13 02:36:17,161 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:17,161 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,161 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,161 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:17,161 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,162 INFO L82 PathProgramCache]: Analyzing trace with hash 36259, now seen corresponding path program 1 times [2021-08-13 02:36:17,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966036391] [2021-08-13 02:36:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:17,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:17,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:17,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:17,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966036391] [2021-08-13 02:36:17,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966036391] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:17,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:17,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:17,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710142348] [2021-08-13 02:36:17,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:17,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:17,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:17,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:17,173 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 80 [2021-08-13 02:36:17,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 78 transitions, 881 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:17,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 80 [2021-08-13 02:36:17,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:17,199 INFO L129 PetriNetUnfolder]: 0/77 cut-off events. [2021-08-13 02:36:17,199 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 77 events. 0/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 142 event pairs, 0 based on Foata normal form. 26/103 useless extension candidates. Maximal degree in co-relation 0. Up to 26 conditions per place. [2021-08-13 02:36:17,199 INFO L132 encePairwiseOnDemand]: 78/80 looper letters, 0 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2021-08-13 02:36:17,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 77 transitions, 881 flow [2021-08-13 02:36:17,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:17,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:17,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2021-08-13 02:36:17,200 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9708333333333333 [2021-08-13 02:36:17,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2021-08-13 02:36:17,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2021-08-13 02:36:17,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:17,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2021-08-13 02:36:17,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,203 INFO L348 CegarLoopForPetriNet]: 129 programPoint places, 1 predicate places. [2021-08-13 02:36:17,203 INFO L482 AbstractCegarLoop]: Abstraction has has 130 places, 77 transitions, 881 flow [2021-08-13 02:36:17,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,203 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,203 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:17,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-08-13 02:36:17,203 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1752179327, now seen corresponding path program 1 times [2021-08-13 02:36:17,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464953407] [2021-08-13 02:36:17,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,209 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,212 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,217 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:17,217 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:17,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-08-13 02:36:17,218 WARN L235 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:17,218 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2021-08-13 02:36:17,246 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:17,246 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:17,247 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:17,247 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:17,247 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:17,247 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:17,247 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:17,247 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:17,247 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:17,247 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:17,249 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 136 places, 83 transitions, 946 flow [2021-08-13 02:36:17,286 INFO L129 PetriNetUnfolder]: 0/161 cut-off events. [2021-08-13 02:36:17,286 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 161 events. 0/161 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 505 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2021-08-13 02:36:17,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 83 transitions, 946 flow [2021-08-13 02:36:17,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 81 transitions, 942 flow [2021-08-13 02:36:17,288 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:17,289 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,289 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,289 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:17,289 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,289 INFO L82 PathProgramCache]: Analyzing trace with hash 38915, now seen corresponding path program 1 times [2021-08-13 02:36:17,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709859862] [2021-08-13 02:36:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:17,297 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:17,298 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:17,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:17,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709859862] [2021-08-13 02:36:17,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709859862] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:17,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:17,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:17,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097168506] [2021-08-13 02:36:17,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:17,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:17,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:17,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:17,302 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 83 [2021-08-13 02:36:17,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 81 transitions, 942 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:17,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 83 [2021-08-13 02:36:17,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:17,317 INFO L129 PetriNetUnfolder]: 0/80 cut-off events. [2021-08-13 02:36:17,317 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 80 events. 0/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 129 event pairs, 0 based on Foata normal form. 27/107 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2021-08-13 02:36:17,319 INFO L132 encePairwiseOnDemand]: 81/83 looper letters, 0 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2021-08-13 02:36:17,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 80 transitions, 942 flow [2021-08-13 02:36:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:17,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2021-08-13 02:36:17,320 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9718875502008032 [2021-08-13 02:36:17,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2021-08-13 02:36:17,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2021-08-13 02:36:17,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:17,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2021-08-13 02:36:17,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,322 INFO L348 CegarLoopForPetriNet]: 134 programPoint places, 1 predicate places. [2021-08-13 02:36:17,322 INFO L482 AbstractCegarLoop]: Abstraction has has 135 places, 80 transitions, 942 flow [2021-08-13 02:36:17,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,322 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,322 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:17,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-08-13 02:36:17,322 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1126967375, now seen corresponding path program 1 times [2021-08-13 02:36:17,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776002062] [2021-08-13 02:36:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,328 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,330 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,336 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:17,337 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:17,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-08-13 02:36:17,338 WARN L235 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:17,338 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2021-08-13 02:36:17,365 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:17,365 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:17,366 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:17,366 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:17,366 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:17,366 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:17,366 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:17,366 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:17,366 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:17,366 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:17,367 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 86 transitions, 1009 flow [2021-08-13 02:36:17,386 INFO L129 PetriNetUnfolder]: 0/167 cut-off events. [2021-08-13 02:36:17,386 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 167 events. 0/167 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 560 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2021-08-13 02:36:17,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 86 transitions, 1009 flow [2021-08-13 02:36:17,388 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 84 transitions, 1005 flow [2021-08-13 02:36:17,388 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:17,388 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,388 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,388 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:17,388 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,389 INFO L82 PathProgramCache]: Analyzing trace with hash 41667, now seen corresponding path program 1 times [2021-08-13 02:36:17,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382789213] [2021-08-13 02:36:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:17,395 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:17,395 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:17,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:17,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382789213] [2021-08-13 02:36:17,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382789213] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:17,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:17,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:17,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871007957] [2021-08-13 02:36:17,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:17,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:17,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:17,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:17,399 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 86 [2021-08-13 02:36:17,399 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 84 transitions, 1005 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,399 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:17,399 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 86 [2021-08-13 02:36:17,399 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:17,413 INFO L129 PetriNetUnfolder]: 0/83 cut-off events. [2021-08-13 02:36:17,414 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,414 INFO L84 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 83 events. 0/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 174 event pairs, 0 based on Foata normal form. 28/111 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2021-08-13 02:36:17,414 INFO L132 encePairwiseOnDemand]: 84/86 looper letters, 0 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2021-08-13 02:36:17,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 83 transitions, 1005 flow [2021-08-13 02:36:17,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:17,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:17,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2021-08-13 02:36:17,415 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9728682170542635 [2021-08-13 02:36:17,415 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2021-08-13 02:36:17,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2021-08-13 02:36:17,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:17,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2021-08-13 02:36:17,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,418 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,418 INFO L348 CegarLoopForPetriNet]: 139 programPoint places, 1 predicate places. [2021-08-13 02:36:17,418 INFO L482 AbstractCegarLoop]: Abstraction has has 140 places, 83 transitions, 1005 flow [2021-08-13 02:36:17,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,418 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,418 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:17,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-08-13 02:36:17,418 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,419 INFO L82 PathProgramCache]: Analyzing trace with hash 941229833, now seen corresponding path program 1 times [2021-08-13 02:36:17,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939617437] [2021-08-13 02:36:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,424 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,426 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,430 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:17,432 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:17,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-08-13 02:36:17,432 WARN L235 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:17,432 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2021-08-13 02:36:17,474 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:17,475 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:17,476 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:17,476 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:17,476 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:17,476 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:17,476 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:17,476 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:17,476 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:17,476 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:17,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 146 places, 89 transitions, 1074 flow [2021-08-13 02:36:17,498 INFO L129 PetriNetUnfolder]: 0/173 cut-off events. [2021-08-13 02:36:17,498 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,499 INFO L84 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 173 events. 0/173 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 574 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2021-08-13 02:36:17,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 89 transitions, 1074 flow [2021-08-13 02:36:17,500 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 87 transitions, 1070 flow [2021-08-13 02:36:17,500 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:17,500 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,500 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,500 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:17,501 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,501 INFO L82 PathProgramCache]: Analyzing trace with hash 44515, now seen corresponding path program 1 times [2021-08-13 02:36:17,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517425479] [2021-08-13 02:36:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:17,507 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:17,508 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:17,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:17,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517425479] [2021-08-13 02:36:17,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517425479] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:17,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:17,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:17,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942834231] [2021-08-13 02:36:17,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:17,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:17,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:17,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:17,511 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 89 [2021-08-13 02:36:17,512 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 87 transitions, 1070 flow. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 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) [2021-08-13 02:36:17,512 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:17,512 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 89 [2021-08-13 02:36:17,512 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:17,527 INFO L129 PetriNetUnfolder]: 0/86 cut-off events. [2021-08-13 02:36:17,527 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,527 INFO L84 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 86 events. 0/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 183 event pairs, 0 based on Foata normal form. 29/115 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2021-08-13 02:36:17,528 INFO L132 encePairwiseOnDemand]: 87/89 looper letters, 0 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2021-08-13 02:36:17,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 86 transitions, 1070 flow [2021-08-13 02:36:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:17,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2021-08-13 02:36:17,528 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9737827715355806 [2021-08-13 02:36:17,529 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2021-08-13 02:36:17,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2021-08-13 02:36:17,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:17,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2021-08-13 02:36:17,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 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) [2021-08-13 02:36:17,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,530 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,530 INFO L348 CegarLoopForPetriNet]: 144 programPoint places, 1 predicate places. [2021-08-13 02:36:17,530 INFO L482 AbstractCegarLoop]: Abstraction has has 145 places, 86 transitions, 1070 flow [2021-08-13 02:36:17,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 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) [2021-08-13 02:36:17,530 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,530 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:17,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-08-13 02:36:17,531 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1443307026, now seen corresponding path program 1 times [2021-08-13 02:36:17,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044050023] [2021-08-13 02:36:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,537 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,538 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,542 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:17,543 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:17,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-08-13 02:36:17,543 WARN L235 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:17,543 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2021-08-13 02:36:17,570 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:17,571 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:17,573 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:17,573 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:17,573 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:17,573 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:17,573 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:17,573 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:17,573 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:17,573 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:17,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 151 places, 92 transitions, 1141 flow [2021-08-13 02:36:17,593 INFO L129 PetriNetUnfolder]: 0/179 cut-off events. [2021-08-13 02:36:17,593 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 702 conditions, 179 events. 0/179 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 587 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2021-08-13 02:36:17,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 92 transitions, 1141 flow [2021-08-13 02:36:17,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 90 transitions, 1137 flow [2021-08-13 02:36:17,597 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:17,597 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,597 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,597 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:17,597 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,598 INFO L82 PathProgramCache]: Analyzing trace with hash 47459, now seen corresponding path program 1 times [2021-08-13 02:36:17,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538937060] [2021-08-13 02:36:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:17,626 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:17,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:17,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:17,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538937060] [2021-08-13 02:36:17,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538937060] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:17,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:17,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:17,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086917895] [2021-08-13 02:36:17,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:17,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:17,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:17,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:17,630 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 92 [2021-08-13 02:36:17,630 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 90 transitions, 1137 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,630 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:17,630 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 92 [2021-08-13 02:36:17,630 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:17,646 INFO L129 PetriNetUnfolder]: 0/89 cut-off events. [2021-08-13 02:36:17,646 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 89 events. 0/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 162 event pairs, 0 based on Foata normal form. 30/119 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2021-08-13 02:36:17,647 INFO L132 encePairwiseOnDemand]: 90/92 looper letters, 0 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2021-08-13 02:36:17,647 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 89 transitions, 1137 flow [2021-08-13 02:36:17,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:17,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:17,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2021-08-13 02:36:17,648 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9746376811594203 [2021-08-13 02:36:17,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2021-08-13 02:36:17,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2021-08-13 02:36:17,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:17,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2021-08-13 02:36:17,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,651 INFO L348 CegarLoopForPetriNet]: 149 programPoint places, 1 predicate places. [2021-08-13 02:36:17,651 INFO L482 AbstractCegarLoop]: Abstraction has has 150 places, 89 transitions, 1137 flow [2021-08-13 02:36:17,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,651 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,651 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:17,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-08-13 02:36:17,652 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1664869597, now seen corresponding path program 1 times [2021-08-13 02:36:17,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060401925] [2021-08-13 02:36:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,658 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,659 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,664 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:17,664 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:17,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-08-13 02:36:17,664 WARN L235 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:17,664 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2021-08-13 02:36:17,693 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:17,693 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:17,694 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:17,694 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:17,694 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:17,694 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:17,694 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:17,694 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:17,694 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:17,694 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:17,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 156 places, 95 transitions, 1210 flow [2021-08-13 02:36:17,718 INFO L129 PetriNetUnfolder]: 0/185 cut-off events. [2021-08-13 02:36:17,719 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 185 events. 0/185 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 595 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2021-08-13 02:36:17,719 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 95 transitions, 1210 flow [2021-08-13 02:36:17,722 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 93 transitions, 1206 flow [2021-08-13 02:36:17,723 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:17,723 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,723 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,723 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:17,723 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,724 INFO L82 PathProgramCache]: Analyzing trace with hash 50499, now seen corresponding path program 1 times [2021-08-13 02:36:17,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901991025] [2021-08-13 02:36:17,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:17,731 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:17,731 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:17,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:17,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901991025] [2021-08-13 02:36:17,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901991025] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:17,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:17,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:17,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215166740] [2021-08-13 02:36:17,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:17,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:17,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:17,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:17,735 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 95 [2021-08-13 02:36:17,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 93 transitions, 1206 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,736 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:17,736 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 95 [2021-08-13 02:36:17,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:17,757 INFO L129 PetriNetUnfolder]: 0/92 cut-off events. [2021-08-13 02:36:17,757 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 92 events. 0/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 158 event pairs, 0 based on Foata normal form. 31/123 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2021-08-13 02:36:17,758 INFO L132 encePairwiseOnDemand]: 93/95 looper letters, 0 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2021-08-13 02:36:17,758 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 92 transitions, 1206 flow [2021-08-13 02:36:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2021-08-13 02:36:17,759 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9754385964912281 [2021-08-13 02:36:17,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2021-08-13 02:36:17,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2021-08-13 02:36:17,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:17,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2021-08-13 02:36:17,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,761 INFO L348 CegarLoopForPetriNet]: 154 programPoint places, 1 predicate places. [2021-08-13 02:36:17,761 INFO L482 AbstractCegarLoop]: Abstraction has has 155 places, 92 transitions, 1206 flow [2021-08-13 02:36:17,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,761 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,761 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:17,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-08-13 02:36:17,761 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,762 INFO L82 PathProgramCache]: Analyzing trace with hash -678346091, now seen corresponding path program 1 times [2021-08-13 02:36:17,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746869102] [2021-08-13 02:36:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,768 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,770 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,777 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:17,777 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:17,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-08-13 02:36:17,778 WARN L235 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:17,778 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2021-08-13 02:36:17,808 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:17,809 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:17,809 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:17,809 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:17,810 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:17,810 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:17,810 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:17,810 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:17,810 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:17,810 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:17,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 161 places, 98 transitions, 1281 flow [2021-08-13 02:36:17,835 INFO L129 PetriNetUnfolder]: 0/191 cut-off events. [2021-08-13 02:36:17,836 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 191 events. 0/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 612 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2021-08-13 02:36:17,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 98 transitions, 1281 flow [2021-08-13 02:36:17,837 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 96 transitions, 1277 flow [2021-08-13 02:36:17,838 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:17,838 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,838 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,838 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:17,838 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,838 INFO L82 PathProgramCache]: Analyzing trace with hash 53635, now seen corresponding path program 1 times [2021-08-13 02:36:17,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376637497] [2021-08-13 02:36:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:17,845 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:17,845 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:17,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:17,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376637497] [2021-08-13 02:36:17,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376637497] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:17,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:17,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:17,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796480224] [2021-08-13 02:36:17,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:17,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:17,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:17,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:17,849 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 98 [2021-08-13 02:36:17,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 96 transitions, 1277 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:17,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 98 [2021-08-13 02:36:17,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:17,869 INFO L129 PetriNetUnfolder]: 0/95 cut-off events. [2021-08-13 02:36:17,870 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 95 events. 0/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 175 event pairs, 0 based on Foata normal form. 32/127 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2021-08-13 02:36:17,870 INFO L132 encePairwiseOnDemand]: 96/98 looper letters, 0 selfloop transitions, 1 changer transitions 0/95 dead transitions. [2021-08-13 02:36:17,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 95 transitions, 1277 flow [2021-08-13 02:36:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2021-08-13 02:36:17,871 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9761904761904762 [2021-08-13 02:36:17,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2021-08-13 02:36:17,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2021-08-13 02:36:17,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:17,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2021-08-13 02:36:17,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,873 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,873 INFO L348 CegarLoopForPetriNet]: 159 programPoint places, 1 predicate places. [2021-08-13 02:36:17,873 INFO L482 AbstractCegarLoop]: Abstraction has has 160 places, 95 transitions, 1277 flow [2021-08-13 02:36:17,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,873 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,873 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:17,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-08-13 02:36:17,874 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,874 INFO L82 PathProgramCache]: Analyzing trace with hash -358163843, now seen corresponding path program 1 times [2021-08-13 02:36:17,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127514077] [2021-08-13 02:36:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,880 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:17,882 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:17,887 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:17,887 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:17,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-08-13 02:36:17,887 WARN L235 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:17,887 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2021-08-13 02:36:17,921 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:17,922 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:17,922 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:17,922 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:17,922 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:17,922 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:17,922 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:17,922 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:17,922 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:17,923 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:17,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 166 places, 101 transitions, 1354 flow [2021-08-13 02:36:17,965 INFO L129 PetriNetUnfolder]: 0/197 cut-off events. [2021-08-13 02:36:17,966 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 197 events. 0/197 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 637 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2021-08-13 02:36:17,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 101 transitions, 1354 flow [2021-08-13 02:36:17,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 99 transitions, 1350 flow [2021-08-13 02:36:17,968 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:17,968 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:17,968 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:17,969 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:17,969 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:17,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:17,969 INFO L82 PathProgramCache]: Analyzing trace with hash 56867, now seen corresponding path program 1 times [2021-08-13 02:36:17,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:17,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947574425] [2021-08-13 02:36:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:17,985 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:17,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:17,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:17,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947574425] [2021-08-13 02:36:17,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947574425] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:17,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:17,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:17,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548671563] [2021-08-13 02:36:17,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:17,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:17,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:17,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:17,993 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 101 [2021-08-13 02:36:17,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 99 transitions, 1350 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:17,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:17,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 101 [2021-08-13 02:36:17,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:18,017 INFO L129 PetriNetUnfolder]: 0/98 cut-off events. [2021-08-13 02:36:18,017 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 98 events. 0/98 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 197 event pairs, 0 based on Foata normal form. 33/131 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2021-08-13 02:36:18,018 INFO L132 encePairwiseOnDemand]: 99/101 looper letters, 0 selfloop transitions, 1 changer transitions 0/98 dead transitions. [2021-08-13 02:36:18,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 98 transitions, 1350 flow [2021-08-13 02:36:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2021-08-13 02:36:18,019 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.976897689768977 [2021-08-13 02:36:18,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2021-08-13 02:36:18,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2021-08-13 02:36:18,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:18,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2021-08-13 02:36:18,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,022 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,022 INFO L348 CegarLoopForPetriNet]: 164 programPoint places, 1 predicate places. [2021-08-13 02:36:18,022 INFO L482 AbstractCegarLoop]: Abstraction has has 165 places, 98 transitions, 1350 flow [2021-08-13 02:36:18,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,023 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:18,023 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:18,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-08-13 02:36:18,023 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:18,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:18,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1932783016, now seen corresponding path program 1 times [2021-08-13 02:36:18,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:18,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884249464] [2021-08-13 02:36:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:18,033 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:18,036 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:18,042 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:18,043 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:18,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-08-13 02:36:18,043 WARN L235 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:18,043 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2021-08-13 02:36:18,084 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:18,084 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:18,085 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:18,085 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:18,085 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:18,085 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:18,085 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:18,085 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:18,085 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:18,086 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:18,087 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 171 places, 104 transitions, 1429 flow [2021-08-13 02:36:18,116 INFO L129 PetriNetUnfolder]: 0/203 cut-off events. [2021-08-13 02:36:18,117 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 203 events. 0/203 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 653 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2021-08-13 02:36:18,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 104 transitions, 1429 flow [2021-08-13 02:36:18,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 102 transitions, 1425 flow [2021-08-13 02:36:18,119 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:18,119 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,119 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:18,119 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:18,119 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:18,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:18,120 INFO L82 PathProgramCache]: Analyzing trace with hash 60195, now seen corresponding path program 1 times [2021-08-13 02:36:18,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:18,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872828550] [2021-08-13 02:36:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:18,127 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:18,127 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:18,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:18,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872828550] [2021-08-13 02:36:18,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872828550] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:18,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:18,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:18,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025672260] [2021-08-13 02:36:18,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:18,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:18,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:18,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:18,131 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 104 [2021-08-13 02:36:18,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 102 transitions, 1425 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:18,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 104 [2021-08-13 02:36:18,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:18,154 INFO L129 PetriNetUnfolder]: 0/101 cut-off events. [2021-08-13 02:36:18,154 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,154 INFO L84 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 101 events. 0/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 206 event pairs, 0 based on Foata normal form. 34/135 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2021-08-13 02:36:18,154 INFO L132 encePairwiseOnDemand]: 102/104 looper letters, 0 selfloop transitions, 1 changer transitions 0/101 dead transitions. [2021-08-13 02:36:18,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 101 transitions, 1425 flow [2021-08-13 02:36:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2021-08-13 02:36:18,155 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9775641025641025 [2021-08-13 02:36:18,155 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2021-08-13 02:36:18,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2021-08-13 02:36:18,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:18,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2021-08-13 02:36:18,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,157 INFO L348 CegarLoopForPetriNet]: 169 programPoint places, 1 predicate places. [2021-08-13 02:36:18,157 INFO L482 AbstractCegarLoop]: Abstraction has has 170 places, 101 transitions, 1425 flow [2021-08-13 02:36:18,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,158 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:18,158 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:18,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-08-13 02:36:18,158 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:18,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:18,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1649052521, now seen corresponding path program 1 times [2021-08-13 02:36:18,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:18,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537983094] [2021-08-13 02:36:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:18,165 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:18,167 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:18,172 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:18,172 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:18,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-08-13 02:36:18,173 WARN L235 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:18,173 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2021-08-13 02:36:18,205 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:18,206 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:18,206 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:18,207 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:18,207 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:18,207 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:18,207 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:18,207 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:18,207 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:18,207 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:18,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 176 places, 107 transitions, 1506 flow [2021-08-13 02:36:18,241 INFO L129 PetriNetUnfolder]: 0/209 cut-off events. [2021-08-13 02:36:18,241 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,241 INFO L84 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 209 events. 0/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 678 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2021-08-13 02:36:18,241 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 107 transitions, 1506 flow [2021-08-13 02:36:18,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 105 transitions, 1502 flow [2021-08-13 02:36:18,243 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:18,243 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,243 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:18,244 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:18,244 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:18,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:18,244 INFO L82 PathProgramCache]: Analyzing trace with hash 63619, now seen corresponding path program 1 times [2021-08-13 02:36:18,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:18,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651352365] [2021-08-13 02:36:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:18,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:18,251 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:18,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:18,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651352365] [2021-08-13 02:36:18,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651352365] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:18,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:18,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:18,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032482877] [2021-08-13 02:36:18,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:18,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:18,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:18,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:18,255 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 107 [2021-08-13 02:36:18,255 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 105 transitions, 1502 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,255 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:18,255 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 107 [2021-08-13 02:36:18,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:18,279 INFO L129 PetriNetUnfolder]: 0/104 cut-off events. [2021-08-13 02:36:18,279 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 804 conditions, 104 events. 0/104 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 217 event pairs, 0 based on Foata normal form. 35/139 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2021-08-13 02:36:18,280 INFO L132 encePairwiseOnDemand]: 105/107 looper letters, 0 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2021-08-13 02:36:18,280 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 104 transitions, 1502 flow [2021-08-13 02:36:18,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:18,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:18,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2021-08-13 02:36:18,281 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9781931464174455 [2021-08-13 02:36:18,281 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2021-08-13 02:36:18,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2021-08-13 02:36:18,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:18,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2021-08-13 02:36:18,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,284 INFO L348 CegarLoopForPetriNet]: 174 programPoint places, 1 predicate places. [2021-08-13 02:36:18,284 INFO L482 AbstractCegarLoop]: Abstraction has has 175 places, 104 transitions, 1502 flow [2021-08-13 02:36:18,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,284 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:18,284 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:18,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-08-13 02:36:18,284 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:18,284 INFO L82 PathProgramCache]: Analyzing trace with hash -973944357, now seen corresponding path program 1 times [2021-08-13 02:36:18,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:18,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732415115] [2021-08-13 02:36:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:18,291 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:18,293 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:18,305 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:18,305 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:18,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-08-13 02:36:18,306 WARN L235 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:18,306 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2021-08-13 02:36:18,338 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:18,338 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:18,339 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:18,339 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:18,339 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:18,339 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:18,339 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:18,339 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:18,339 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:18,339 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:18,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 181 places, 110 transitions, 1585 flow [2021-08-13 02:36:18,393 INFO L129 PetriNetUnfolder]: 0/215 cut-off events. [2021-08-13 02:36:18,393 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 215 events. 0/215 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 696 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2021-08-13 02:36:18,393 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 110 transitions, 1585 flow [2021-08-13 02:36:18,395 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 108 transitions, 1581 flow [2021-08-13 02:36:18,395 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:18,395 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,395 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:18,395 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:18,396 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:18,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:18,396 INFO L82 PathProgramCache]: Analyzing trace with hash 67139, now seen corresponding path program 1 times [2021-08-13 02:36:18,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:18,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323438064] [2021-08-13 02:36:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:18,403 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:18,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:18,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:18,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323438064] [2021-08-13 02:36:18,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323438064] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:18,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:18,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:18,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100229445] [2021-08-13 02:36:18,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:18,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:18,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:18,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:18,406 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 110 [2021-08-13 02:36:18,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 108 transitions, 1581 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:18,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 110 [2021-08-13 02:36:18,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:18,430 INFO L129 PetriNetUnfolder]: 0/107 cut-off events. [2021-08-13 02:36:18,430 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 107 events. 0/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 204 event pairs, 0 based on Foata normal form. 36/143 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2021-08-13 02:36:18,431 INFO L132 encePairwiseOnDemand]: 108/110 looper letters, 0 selfloop transitions, 1 changer transitions 0/107 dead transitions. [2021-08-13 02:36:18,431 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 107 transitions, 1581 flow [2021-08-13 02:36:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:18,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2021-08-13 02:36:18,433 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9787878787878788 [2021-08-13 02:36:18,433 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2021-08-13 02:36:18,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2021-08-13 02:36:18,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:18,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2021-08-13 02:36:18,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,436 INFO L348 CegarLoopForPetriNet]: 179 programPoint places, 1 predicate places. [2021-08-13 02:36:18,436 INFO L482 AbstractCegarLoop]: Abstraction has has 180 places, 107 transitions, 1581 flow [2021-08-13 02:36:18,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,436 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:18,436 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:18,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-08-13 02:36:18,436 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:18,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:18,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1276847327, now seen corresponding path program 1 times [2021-08-13 02:36:18,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:18,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257931933] [2021-08-13 02:36:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:18,444 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:18,446 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:18,451 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:18,451 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:18,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-08-13 02:36:18,451 WARN L235 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:18,451 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2021-08-13 02:36:18,483 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:18,484 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:18,484 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:18,484 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:18,484 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:18,484 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:18,484 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:18,484 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:18,484 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:18,484 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:18,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 186 places, 113 transitions, 1666 flow [2021-08-13 02:36:18,527 INFO L129 PetriNetUnfolder]: 0/221 cut-off events. [2021-08-13 02:36:18,528 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 221 events. 0/221 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 731 event pairs, 0 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2021-08-13 02:36:18,528 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 113 transitions, 1666 flow [2021-08-13 02:36:18,529 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 111 transitions, 1662 flow [2021-08-13 02:36:18,530 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:18,530 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,530 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:18,530 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:18,530 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:18,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:18,531 INFO L82 PathProgramCache]: Analyzing trace with hash 70755, now seen corresponding path program 1 times [2021-08-13 02:36:18,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:18,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422407049] [2021-08-13 02:36:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:18,537 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:18,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:18,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:18,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422407049] [2021-08-13 02:36:18,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422407049] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:18,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:18,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:18,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131891461] [2021-08-13 02:36:18,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:18,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:18,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:18,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:18,541 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 113 [2021-08-13 02:36:18,541 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 111 transitions, 1662 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:18,542 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 113 [2021-08-13 02:36:18,542 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:18,565 INFO L129 PetriNetUnfolder]: 0/110 cut-off events. [2021-08-13 02:36:18,566 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 110 events. 0/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 227 event pairs, 0 based on Foata normal form. 37/147 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2021-08-13 02:36:18,566 INFO L132 encePairwiseOnDemand]: 111/113 looper letters, 0 selfloop transitions, 1 changer transitions 0/110 dead transitions. [2021-08-13 02:36:18,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 110 transitions, 1662 flow [2021-08-13 02:36:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2021-08-13 02:36:18,568 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9793510324483776 [2021-08-13 02:36:18,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2021-08-13 02:36:18,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2021-08-13 02:36:18,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:18,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2021-08-13 02:36:18,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,570 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,570 INFO L348 CegarLoopForPetriNet]: 184 programPoint places, 1 predicate places. [2021-08-13 02:36:18,570 INFO L482 AbstractCegarLoop]: Abstraction has has 185 places, 110 transitions, 1662 flow [2021-08-13 02:36:18,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,570 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:18,571 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:18,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-08-13 02:36:18,571 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:18,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:18,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1575642526, now seen corresponding path program 1 times [2021-08-13 02:36:18,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:18,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780551767] [2021-08-13 02:36:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:18,578 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:18,582 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:18,588 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:18,588 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:18,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-08-13 02:36:18,588 WARN L235 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:18,588 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2021-08-13 02:36:18,623 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:18,624 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:18,624 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:18,625 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:18,625 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:18,625 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:18,625 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:18,625 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:18,625 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:18,625 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:18,627 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 191 places, 116 transitions, 1749 flow [2021-08-13 02:36:18,657 INFO L129 PetriNetUnfolder]: 0/227 cut-off events. [2021-08-13 02:36:18,657 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 227 events. 0/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 705 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2021-08-13 02:36:18,657 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 116 transitions, 1749 flow [2021-08-13 02:36:18,659 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 114 transitions, 1745 flow [2021-08-13 02:36:18,659 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:18,660 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,660 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:18,660 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:18,660 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:18,660 INFO L82 PathProgramCache]: Analyzing trace with hash 74467, now seen corresponding path program 1 times [2021-08-13 02:36:18,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:18,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92557782] [2021-08-13 02:36:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:18,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:18,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:18,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:18,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92557782] [2021-08-13 02:36:18,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92557782] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:18,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:18,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:18,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100541529] [2021-08-13 02:36:18,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:18,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:18,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:18,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:18,673 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 116 [2021-08-13 02:36:18,673 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 114 transitions, 1745 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:18,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 116 [2021-08-13 02:36:18,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:18,698 INFO L129 PetriNetUnfolder]: 0/113 cut-off events. [2021-08-13 02:36:18,698 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 930 conditions, 113 events. 0/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 213 event pairs, 0 based on Foata normal form. 38/151 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2021-08-13 02:36:18,699 INFO L132 encePairwiseOnDemand]: 114/116 looper letters, 0 selfloop transitions, 1 changer transitions 0/113 dead transitions. [2021-08-13 02:36:18,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 113 transitions, 1745 flow [2021-08-13 02:36:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:18,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:18,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2021-08-13 02:36:18,700 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9798850574712644 [2021-08-13 02:36:18,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2021-08-13 02:36:18,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2021-08-13 02:36:18,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:18,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2021-08-13 02:36:18,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,702 INFO L348 CegarLoopForPetriNet]: 189 programPoint places, 1 predicate places. [2021-08-13 02:36:18,702 INFO L482 AbstractCegarLoop]: Abstraction has has 190 places, 113 transitions, 1745 flow [2021-08-13 02:36:18,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,703 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:18,703 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:18,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-08-13 02:36:18,703 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:18,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1399722715, now seen corresponding path program 1 times [2021-08-13 02:36:18,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:18,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659080766] [2021-08-13 02:36:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:18,713 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:18,715 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:18,720 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:18,720 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:18,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-08-13 02:36:18,722 WARN L235 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:18,722 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2021-08-13 02:36:18,756 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:18,756 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:18,757 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:18,757 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:18,757 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:18,757 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:18,757 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:18,757 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:18,757 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:18,757 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:18,759 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 196 places, 119 transitions, 1834 flow [2021-08-13 02:36:18,810 INFO L129 PetriNetUnfolder]: 0/233 cut-off events. [2021-08-13 02:36:18,811 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 233 events. 0/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 762 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2021-08-13 02:36:18,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 119 transitions, 1834 flow [2021-08-13 02:36:18,817 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 117 transitions, 1830 flow [2021-08-13 02:36:18,818 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:18,818 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,818 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:18,818 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:18,818 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:18,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:18,819 INFO L82 PathProgramCache]: Analyzing trace with hash 78275, now seen corresponding path program 1 times [2021-08-13 02:36:18,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:18,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116831157] [2021-08-13 02:36:18,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:18,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:18,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:18,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:18,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116831157] [2021-08-13 02:36:18,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116831157] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:18,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:18,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:18,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133416865] [2021-08-13 02:36:18,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:18,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:18,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:18,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:18,830 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 119 [2021-08-13 02:36:18,831 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 117 transitions, 1830 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 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) [2021-08-13 02:36:18,831 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:18,831 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 119 [2021-08-13 02:36:18,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:18,857 INFO L129 PetriNetUnfolder]: 0/116 cut-off events. [2021-08-13 02:36:18,857 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,857 INFO L84 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 116 events. 0/116 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 221 event pairs, 0 based on Foata normal form. 39/155 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2021-08-13 02:36:18,858 INFO L132 encePairwiseOnDemand]: 117/119 looper letters, 0 selfloop transitions, 1 changer transitions 0/116 dead transitions. [2021-08-13 02:36:18,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 116 transitions, 1830 flow [2021-08-13 02:36:18,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2021-08-13 02:36:18,859 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9803921568627451 [2021-08-13 02:36:18,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2021-08-13 02:36:18,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2021-08-13 02:36:18,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:18,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2021-08-13 02:36:18,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 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) [2021-08-13 02:36:18,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,861 INFO L348 CegarLoopForPetriNet]: 194 programPoint places, 1 predicate places. [2021-08-13 02:36:18,861 INFO L482 AbstractCegarLoop]: Abstraction has has 195 places, 116 transitions, 1830 flow [2021-08-13 02:36:18,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 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) [2021-08-13 02:36:18,861 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:18,861 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:18,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-08-13 02:36:18,861 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:18,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:18,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2142347809, now seen corresponding path program 1 times [2021-08-13 02:36:18,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:18,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227067341] [2021-08-13 02:36:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:18,869 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:18,871 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:18,877 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:18,877 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:18,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-08-13 02:36:18,878 WARN L235 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:18,878 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2021-08-13 02:36:18,914 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:18,914 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:18,915 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:18,915 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:18,915 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:18,915 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:18,915 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:18,915 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:18,915 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:18,916 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:18,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 201 places, 122 transitions, 1921 flow [2021-08-13 02:36:18,951 INFO L129 PetriNetUnfolder]: 0/239 cut-off events. [2021-08-13 02:36:18,951 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,951 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 239 events. 0/239 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 781 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2021-08-13 02:36:18,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 122 transitions, 1921 flow [2021-08-13 02:36:18,953 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 120 transitions, 1917 flow [2021-08-13 02:36:18,953 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:18,953 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,953 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:18,953 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:18,954 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:18,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:18,954 INFO L82 PathProgramCache]: Analyzing trace with hash 82179, now seen corresponding path program 1 times [2021-08-13 02:36:18,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:18,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109411578] [2021-08-13 02:36:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:18,964 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:18,964 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:18,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:18,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109411578] [2021-08-13 02:36:18,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109411578] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:18,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:18,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:18,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791534243] [2021-08-13 02:36:18,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:18,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:18,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:18,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:18,968 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 122 [2021-08-13 02:36:18,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 120 transitions, 1917 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:18,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 122 [2021-08-13 02:36:18,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:18,996 INFO L129 PetriNetUnfolder]: 0/119 cut-off events. [2021-08-13 02:36:18,996 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:18,996 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1019 conditions, 119 events. 0/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 229 event pairs, 0 based on Foata normal form. 40/159 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2021-08-13 02:36:18,996 INFO L132 encePairwiseOnDemand]: 120/122 looper letters, 0 selfloop transitions, 1 changer transitions 0/119 dead transitions. [2021-08-13 02:36:18,997 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 119 transitions, 1917 flow [2021-08-13 02:36:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2021-08-13 02:36:18,997 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9808743169398907 [2021-08-13 02:36:18,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2021-08-13 02:36:18,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2021-08-13 02:36:18,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:18,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2021-08-13 02:36:18,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,999 INFO L348 CegarLoopForPetriNet]: 199 programPoint places, 1 predicate places. [2021-08-13 02:36:18,999 INFO L482 AbstractCegarLoop]: Abstraction has has 200 places, 119 transitions, 1917 flow [2021-08-13 02:36:18,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:18,999 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:19,000 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:19,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-08-13 02:36:19,000 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:19,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:19,000 INFO L82 PathProgramCache]: Analyzing trace with hash 73147637, now seen corresponding path program 1 times [2021-08-13 02:36:19,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:19,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033843593] [2021-08-13 02:36:19,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:19,008 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:19,010 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:19,016 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:19,016 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:19,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-08-13 02:36:19,017 WARN L235 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:19,017 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2021-08-13 02:36:19,053 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:19,053 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:19,054 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:19,054 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:19,054 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:19,054 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:19,054 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:19,054 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:19,054 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:19,054 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:19,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 206 places, 125 transitions, 2010 flow [2021-08-13 02:36:19,091 INFO L129 PetriNetUnfolder]: 0/245 cut-off events. [2021-08-13 02:36:19,091 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:19,091 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 245 events. 0/245 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 786 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2021-08-13 02:36:19,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 125 transitions, 2010 flow [2021-08-13 02:36:19,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 123 transitions, 2006 flow [2021-08-13 02:36:19,093 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:19,094 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:19,094 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:19,094 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:19,094 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:19,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:19,094 INFO L82 PathProgramCache]: Analyzing trace with hash 86179, now seen corresponding path program 1 times [2021-08-13 02:36:19,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:19,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633662621] [2021-08-13 02:36:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:19,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:19,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:19,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:19,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633662621] [2021-08-13 02:36:19,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633662621] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:19,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:19,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:19,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606711227] [2021-08-13 02:36:19,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:19,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:19,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:19,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:19,107 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 125 [2021-08-13 02:36:19,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 123 transitions, 2006 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,107 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:19,107 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 125 [2021-08-13 02:36:19,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:19,162 INFO L129 PetriNetUnfolder]: 0/122 cut-off events. [2021-08-13 02:36:19,162 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:19,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 122 events. 0/122 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 218 event pairs, 0 based on Foata normal form. 41/163 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2021-08-13 02:36:19,163 INFO L132 encePairwiseOnDemand]: 123/125 looper letters, 0 selfloop transitions, 1 changer transitions 0/122 dead transitions. [2021-08-13 02:36:19,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 122 transitions, 2006 flow [2021-08-13 02:36:19,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2021-08-13 02:36:19,164 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9813333333333333 [2021-08-13 02:36:19,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2021-08-13 02:36:19,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2021-08-13 02:36:19,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:19,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2021-08-13 02:36:19,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,166 INFO L348 CegarLoopForPetriNet]: 204 programPoint places, 1 predicate places. [2021-08-13 02:36:19,166 INFO L482 AbstractCegarLoop]: Abstraction has has 205 places, 122 transitions, 2006 flow [2021-08-13 02:36:19,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,166 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:19,166 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:19,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-08-13 02:36:19,166 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:19,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:19,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1311704092, now seen corresponding path program 1 times [2021-08-13 02:36:19,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:19,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362340070] [2021-08-13 02:36:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:19,174 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:19,176 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:19,182 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:19,182 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:19,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-08-13 02:36:19,182 WARN L235 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:19,182 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2021-08-13 02:36:19,218 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:19,218 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:19,219 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:19,219 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:19,219 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:19,219 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:19,219 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:19,219 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:19,219 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:19,219 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:19,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 211 places, 128 transitions, 2101 flow [2021-08-13 02:36:19,257 INFO L129 PetriNetUnfolder]: 0/251 cut-off events. [2021-08-13 02:36:19,257 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:19,258 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1236 conditions, 251 events. 0/251 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 802 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2021-08-13 02:36:19,258 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 128 transitions, 2101 flow [2021-08-13 02:36:19,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 126 transitions, 2097 flow [2021-08-13 02:36:19,260 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:19,260 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:19,260 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:19,260 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:19,260 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:19,260 INFO L82 PathProgramCache]: Analyzing trace with hash 90275, now seen corresponding path program 1 times [2021-08-13 02:36:19,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:19,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99496457] [2021-08-13 02:36:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:19,270 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:19,270 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:19,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:19,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99496457] [2021-08-13 02:36:19,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99496457] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:19,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:19,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:19,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59743312] [2021-08-13 02:36:19,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:19,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:19,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:19,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:19,274 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 128 [2021-08-13 02:36:19,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 126 transitions, 2097 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:19,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 128 [2021-08-13 02:36:19,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:19,306 INFO L129 PetriNetUnfolder]: 0/125 cut-off events. [2021-08-13 02:36:19,306 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:19,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1112 conditions, 125 events. 0/125 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 241 event pairs, 0 based on Foata normal form. 42/167 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2021-08-13 02:36:19,306 INFO L132 encePairwiseOnDemand]: 126/128 looper letters, 0 selfloop transitions, 1 changer transitions 0/125 dead transitions. [2021-08-13 02:36:19,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 125 transitions, 2097 flow [2021-08-13 02:36:19,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2021-08-13 02:36:19,307 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9817708333333334 [2021-08-13 02:36:19,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2021-08-13 02:36:19,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2021-08-13 02:36:19,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:19,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2021-08-13 02:36:19,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,309 INFO L348 CegarLoopForPetriNet]: 209 programPoint places, 1 predicate places. [2021-08-13 02:36:19,309 INFO L482 AbstractCegarLoop]: Abstraction has has 210 places, 125 transitions, 2097 flow [2021-08-13 02:36:19,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,310 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:19,310 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:19,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-08-13 02:36:19,310 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:19,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:19,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1607214609, now seen corresponding path program 1 times [2021-08-13 02:36:19,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:19,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694224112] [2021-08-13 02:36:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:19,319 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:19,322 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:19,328 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:19,328 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:19,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-08-13 02:36:19,328 WARN L235 ceAbstractionStarter]: 41 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:19,328 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 42 thread instances. [2021-08-13 02:36:19,382 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:19,382 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:19,383 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:19,383 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:19,383 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:19,383 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:19,383 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:19,383 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:19,383 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:19,383 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:19,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 216 places, 131 transitions, 2194 flow [2021-08-13 02:36:19,422 INFO L129 PetriNetUnfolder]: 0/257 cut-off events. [2021-08-13 02:36:19,422 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:19,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1287 conditions, 257 events. 0/257 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 812 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2021-08-13 02:36:19,422 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 131 transitions, 2194 flow [2021-08-13 02:36:19,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 129 transitions, 2190 flow [2021-08-13 02:36:19,424 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:19,424 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:19,424 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:19,424 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:19,424 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:19,425 INFO L82 PathProgramCache]: Analyzing trace with hash 94467, now seen corresponding path program 1 times [2021-08-13 02:36:19,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:19,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848905994] [2021-08-13 02:36:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:19,433 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:19,434 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:19,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:19,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848905994] [2021-08-13 02:36:19,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848905994] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:19,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:19,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:19,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019611961] [2021-08-13 02:36:19,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:19,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:19,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:19,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:19,438 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 131 [2021-08-13 02:36:19,438 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 129 transitions, 2190 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:19,438 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 131 [2021-08-13 02:36:19,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:19,471 INFO L129 PetriNetUnfolder]: 0/128 cut-off events. [2021-08-13 02:36:19,472 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:19,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1160 conditions, 128 events. 0/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 259 event pairs, 0 based on Foata normal form. 43/171 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2021-08-13 02:36:19,472 INFO L132 encePairwiseOnDemand]: 129/131 looper letters, 0 selfloop transitions, 1 changer transitions 0/128 dead transitions. [2021-08-13 02:36:19,472 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 128 transitions, 2190 flow [2021-08-13 02:36:19,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:19,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2021-08-13 02:36:19,473 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9821882951653944 [2021-08-13 02:36:19,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2021-08-13 02:36:19,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2021-08-13 02:36:19,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:19,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2021-08-13 02:36:19,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,479 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,479 INFO L348 CegarLoopForPetriNet]: 214 programPoint places, 1 predicate places. [2021-08-13 02:36:19,479 INFO L482 AbstractCegarLoop]: Abstraction has has 215 places, 128 transitions, 2190 flow [2021-08-13 02:36:19,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,479 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:19,480 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:19,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-08-13 02:36:19,480 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:19,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1479889049, now seen corresponding path program 1 times [2021-08-13 02:36:19,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:19,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659417521] [2021-08-13 02:36:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:19,517 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:19,520 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:19,527 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:19,527 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:19,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-08-13 02:36:19,528 WARN L235 ceAbstractionStarter]: 42 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:19,528 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 43 thread instances. [2021-08-13 02:36:19,586 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:19,587 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:19,588 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:19,588 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:19,588 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:19,588 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:19,588 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:19,588 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:19,588 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:19,588 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:19,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 221 places, 134 transitions, 2289 flow [2021-08-13 02:36:19,635 INFO L129 PetriNetUnfolder]: 0/263 cut-off events. [2021-08-13 02:36:19,636 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:19,636 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 263 events. 0/263 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 860 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2021-08-13 02:36:19,636 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 134 transitions, 2289 flow [2021-08-13 02:36:19,638 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 132 transitions, 2285 flow [2021-08-13 02:36:19,638 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:19,638 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:19,639 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:19,639 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:19,639 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:19,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:19,640 INFO L82 PathProgramCache]: Analyzing trace with hash 98755, now seen corresponding path program 1 times [2021-08-13 02:36:19,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:19,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462672045] [2021-08-13 02:36:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:19,656 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:19,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:19,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:19,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462672045] [2021-08-13 02:36:19,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462672045] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:19,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:19,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:19,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810962161] [2021-08-13 02:36:19,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:19,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:19,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:19,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:19,664 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 134 [2021-08-13 02:36:19,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 132 transitions, 2285 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:19,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 134 [2021-08-13 02:36:19,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:19,705 INFO L129 PetriNetUnfolder]: 0/131 cut-off events. [2021-08-13 02:36:19,705 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:19,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1209 conditions, 131 events. 0/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 246 event pairs, 0 based on Foata normal form. 44/175 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2021-08-13 02:36:19,706 INFO L132 encePairwiseOnDemand]: 132/134 looper letters, 0 selfloop transitions, 1 changer transitions 0/131 dead transitions. [2021-08-13 02:36:19,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 131 transitions, 2285 flow [2021-08-13 02:36:19,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:19,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2021-08-13 02:36:19,708 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9825870646766169 [2021-08-13 02:36:19,708 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2021-08-13 02:36:19,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2021-08-13 02:36:19,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:19,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2021-08-13 02:36:19,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,713 INFO L348 CegarLoopForPetriNet]: 219 programPoint places, 1 predicate places. [2021-08-13 02:36:19,714 INFO L482 AbstractCegarLoop]: Abstraction has has 220 places, 131 transitions, 2285 flow [2021-08-13 02:36:19,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,714 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:19,714 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:19,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-08-13 02:36:19,714 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash -881273863, now seen corresponding path program 1 times [2021-08-13 02:36:19,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:19,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984128118] [2021-08-13 02:36:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:19,725 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:19,729 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:19,736 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:19,736 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:19,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-08-13 02:36:19,736 WARN L235 ceAbstractionStarter]: 43 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:19,736 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 44 thread instances. [2021-08-13 02:36:19,780 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:19,781 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:19,781 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:19,781 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:19,781 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:19,781 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:19,781 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:19,781 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:19,782 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:19,782 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:19,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 226 places, 137 transitions, 2386 flow [2021-08-13 02:36:19,835 INFO L129 PetriNetUnfolder]: 0/269 cut-off events. [2021-08-13 02:36:19,835 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:19,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1392 conditions, 269 events. 0/269 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 913 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 0. Up to 45 conditions per place. [2021-08-13 02:36:19,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 137 transitions, 2386 flow [2021-08-13 02:36:19,837 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 135 transitions, 2382 flow [2021-08-13 02:36:19,838 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:19,838 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:19,838 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:19,838 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:19,838 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:19,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:19,839 INFO L82 PathProgramCache]: Analyzing trace with hash 103139, now seen corresponding path program 1 times [2021-08-13 02:36:19,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:19,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938324346] [2021-08-13 02:36:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:19,848 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:19,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:19,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:19,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938324346] [2021-08-13 02:36:19,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938324346] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:19,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:19,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:19,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827039364] [2021-08-13 02:36:19,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:19,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:19,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:19,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:19,852 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 137 [2021-08-13 02:36:19,853 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 135 transitions, 2382 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,853 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:19,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 137 [2021-08-13 02:36:19,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:19,887 INFO L129 PetriNetUnfolder]: 0/134 cut-off events. [2021-08-13 02:36:19,887 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:19,887 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1259 conditions, 134 events. 0/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 235 event pairs, 0 based on Foata normal form. 45/179 useless extension candidates. Maximal degree in co-relation 0. Up to 45 conditions per place. [2021-08-13 02:36:19,888 INFO L132 encePairwiseOnDemand]: 135/137 looper letters, 0 selfloop transitions, 1 changer transitions 0/134 dead transitions. [2021-08-13 02:36:19,888 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 134 transitions, 2382 flow [2021-08-13 02:36:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:19,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:19,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2021-08-13 02:36:19,889 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9829683698296837 [2021-08-13 02:36:19,889 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2021-08-13 02:36:19,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2021-08-13 02:36:19,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:19,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2021-08-13 02:36:19,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,891 INFO L348 CegarLoopForPetriNet]: 224 programPoint places, 1 predicate places. [2021-08-13 02:36:19,891 INFO L482 AbstractCegarLoop]: Abstraction has has 225 places, 134 transitions, 2382 flow [2021-08-13 02:36:19,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:19,891 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:19,891 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:19,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-08-13 02:36:19,891 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:19,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:19,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1502263594, now seen corresponding path program 1 times [2021-08-13 02:36:19,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:19,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219813939] [2021-08-13 02:36:19,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:19,904 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:19,907 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:19,915 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:19,915 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:19,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-08-13 02:36:19,915 WARN L235 ceAbstractionStarter]: 44 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:19,915 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 45 thread instances. [2021-08-13 02:36:19,954 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:19,955 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:19,956 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:19,956 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:19,956 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:19,956 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:19,956 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:19,956 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:19,956 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:19,956 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:19,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 231 places, 140 transitions, 2485 flow [2021-08-13 02:36:20,001 INFO L129 PetriNetUnfolder]: 0/275 cut-off events. [2021-08-13 02:36:20,001 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,001 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1446 conditions, 275 events. 0/275 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 866 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 0. Up to 46 conditions per place. [2021-08-13 02:36:20,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 140 transitions, 2485 flow [2021-08-13 02:36:20,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 138 transitions, 2481 flow [2021-08-13 02:36:20,004 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:20,004 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,004 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:20,004 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:20,004 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:20,004 INFO L82 PathProgramCache]: Analyzing trace with hash 107619, now seen corresponding path program 1 times [2021-08-13 02:36:20,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:20,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423730326] [2021-08-13 02:36:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:20,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:20,014 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:20,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:20,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423730326] [2021-08-13 02:36:20,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423730326] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:20,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:20,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:20,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570791381] [2021-08-13 02:36:20,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:20,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:20,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:20,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:20,018 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 140 [2021-08-13 02:36:20,018 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 138 transitions, 2481 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,018 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:20,018 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 140 [2021-08-13 02:36:20,018 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:20,077 INFO L129 PetriNetUnfolder]: 0/137 cut-off events. [2021-08-13 02:36:20,077 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,078 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1310 conditions, 137 events. 0/137 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 251 event pairs, 0 based on Foata normal form. 46/183 useless extension candidates. Maximal degree in co-relation 0. Up to 46 conditions per place. [2021-08-13 02:36:20,078 INFO L132 encePairwiseOnDemand]: 138/140 looper letters, 0 selfloop transitions, 1 changer transitions 0/137 dead transitions. [2021-08-13 02:36:20,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 137 transitions, 2481 flow [2021-08-13 02:36:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:20,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:20,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2021-08-13 02:36:20,079 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9833333333333333 [2021-08-13 02:36:20,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2021-08-13 02:36:20,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2021-08-13 02:36:20,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:20,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2021-08-13 02:36:20,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,081 INFO L348 CegarLoopForPetriNet]: 229 programPoint places, 1 predicate places. [2021-08-13 02:36:20,081 INFO L482 AbstractCegarLoop]: Abstraction has has 230 places, 137 transitions, 2481 flow [2021-08-13 02:36:20,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,081 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:20,082 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:20,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-08-13 02:36:20,082 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:20,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:20,082 INFO L82 PathProgramCache]: Analyzing trace with hash 832000557, now seen corresponding path program 1 times [2021-08-13 02:36:20,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:20,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527946863] [2021-08-13 02:36:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:20,093 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:20,095 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:20,105 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:20,105 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:20,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-08-13 02:36:20,106 WARN L235 ceAbstractionStarter]: 45 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:20,106 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 46 thread instances. [2021-08-13 02:36:20,152 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:20,152 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:20,153 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:20,153 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:20,153 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:20,153 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:20,153 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:20,153 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:20,153 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:20,153 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:20,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 236 places, 143 transitions, 2586 flow [2021-08-13 02:36:20,201 INFO L129 PetriNetUnfolder]: 0/281 cut-off events. [2021-08-13 02:36:20,201 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1501 conditions, 281 events. 0/281 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 937 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2021-08-13 02:36:20,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 143 transitions, 2586 flow [2021-08-13 02:36:20,203 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 141 transitions, 2582 flow [2021-08-13 02:36:20,204 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:20,204 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,204 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:20,204 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:20,204 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:20,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:20,204 INFO L82 PathProgramCache]: Analyzing trace with hash 112195, now seen corresponding path program 1 times [2021-08-13 02:36:20,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:20,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504934789] [2021-08-13 02:36:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:20,213 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:20,213 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:20,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504934789] [2021-08-13 02:36:20,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504934789] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:20,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:20,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:20,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533668322] [2021-08-13 02:36:20,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:20,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:20,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:20,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:20,217 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 143 [2021-08-13 02:36:20,218 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 141 transitions, 2582 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:20,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 143 [2021-08-13 02:36:20,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:20,258 INFO L129 PetriNetUnfolder]: 0/140 cut-off events. [2021-08-13 02:36:20,258 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1362 conditions, 140 events. 0/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 276 event pairs, 0 based on Foata normal form. 47/187 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2021-08-13 02:36:20,259 INFO L132 encePairwiseOnDemand]: 141/143 looper letters, 0 selfloop transitions, 1 changer transitions 0/140 dead transitions. [2021-08-13 02:36:20,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 140 transitions, 2582 flow [2021-08-13 02:36:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2021-08-13 02:36:20,260 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9836829836829837 [2021-08-13 02:36:20,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2021-08-13 02:36:20,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2021-08-13 02:36:20,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:20,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2021-08-13 02:36:20,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,262 INFO L348 CegarLoopForPetriNet]: 234 programPoint places, 1 predicate places. [2021-08-13 02:36:20,262 INFO L482 AbstractCegarLoop]: Abstraction has has 235 places, 140 transitions, 2582 flow [2021-08-13 02:36:20,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,262 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:20,263 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:20,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-08-13 02:36:20,263 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:20,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:20,263 INFO L82 PathProgramCache]: Analyzing trace with hash -522791507, now seen corresponding path program 1 times [2021-08-13 02:36:20,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:20,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786755738] [2021-08-13 02:36:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:20,272 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:20,274 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:20,281 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:20,281 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:20,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-08-13 02:36:20,282 WARN L235 ceAbstractionStarter]: 46 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:20,282 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 47 thread instances. [2021-08-13 02:36:20,329 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:20,330 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:20,330 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:20,330 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:20,330 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:20,330 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:20,330 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:20,330 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:20,330 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:20,330 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:20,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 241 places, 146 transitions, 2689 flow [2021-08-13 02:36:20,378 INFO L129 PetriNetUnfolder]: 0/287 cut-off events. [2021-08-13 02:36:20,379 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1557 conditions, 287 events. 0/287 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 907 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2021-08-13 02:36:20,379 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 146 transitions, 2689 flow [2021-08-13 02:36:20,381 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 144 transitions, 2685 flow [2021-08-13 02:36:20,381 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:20,381 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,381 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:20,381 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:20,382 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:20,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:20,382 INFO L82 PathProgramCache]: Analyzing trace with hash 116867, now seen corresponding path program 1 times [2021-08-13 02:36:20,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:20,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062712170] [2021-08-13 02:36:20,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:20,391 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:20,391 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:20,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:20,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062712170] [2021-08-13 02:36:20,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062712170] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:20,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:20,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:20,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592120287] [2021-08-13 02:36:20,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:20,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:20,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:20,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:20,395 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 146 [2021-08-13 02:36:20,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 144 transitions, 2685 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:20,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 146 [2021-08-13 02:36:20,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:20,433 INFO L129 PetriNetUnfolder]: 0/143 cut-off events. [2021-08-13 02:36:20,433 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1415 conditions, 143 events. 0/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 269 event pairs, 0 based on Foata normal form. 48/191 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2021-08-13 02:36:20,434 INFO L132 encePairwiseOnDemand]: 144/146 looper letters, 0 selfloop transitions, 1 changer transitions 0/143 dead transitions. [2021-08-13 02:36:20,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 143 transitions, 2685 flow [2021-08-13 02:36:20,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2021-08-13 02:36:20,435 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9840182648401826 [2021-08-13 02:36:20,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2021-08-13 02:36:20,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2021-08-13 02:36:20,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:20,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2021-08-13 02:36:20,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,437 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,437 INFO L348 CegarLoopForPetriNet]: 239 programPoint places, 1 predicate places. [2021-08-13 02:36:20,437 INFO L482 AbstractCegarLoop]: Abstraction has has 240 places, 143 transitions, 2685 flow [2021-08-13 02:36:20,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,437 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:20,437 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:20,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-08-13 02:36:20,438 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:20,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:20,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1233847341, now seen corresponding path program 1 times [2021-08-13 02:36:20,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:20,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475881856] [2021-08-13 02:36:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:20,448 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:20,450 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:20,458 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:20,458 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:20,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-08-13 02:36:20,458 WARN L235 ceAbstractionStarter]: 47 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:20,458 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 48 thread instances. [2021-08-13 02:36:20,515 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:20,516 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:20,516 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:20,516 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:20,516 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:20,517 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:20,517 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:20,517 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:20,517 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:20,517 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:20,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 246 places, 149 transitions, 2794 flow [2021-08-13 02:36:20,568 INFO L129 PetriNetUnfolder]: 0/293 cut-off events. [2021-08-13 02:36:20,568 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,568 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 293 events. 0/293 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 948 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 0. Up to 49 conditions per place. [2021-08-13 02:36:20,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 149 transitions, 2794 flow [2021-08-13 02:36:20,604 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 147 transitions, 2790 flow [2021-08-13 02:36:20,605 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:20,605 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,605 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:20,605 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:20,605 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:20,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:20,605 INFO L82 PathProgramCache]: Analyzing trace with hash 121635, now seen corresponding path program 1 times [2021-08-13 02:36:20,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:20,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937320846] [2021-08-13 02:36:20,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:20,619 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:20,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:20,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:20,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937320846] [2021-08-13 02:36:20,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937320846] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:20,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:20,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:20,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133074954] [2021-08-13 02:36:20,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:20,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:20,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:20,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:20,624 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 149 [2021-08-13 02:36:20,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 147 transitions, 2790 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:20,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 149 [2021-08-13 02:36:20,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:20,663 INFO L129 PetriNetUnfolder]: 0/146 cut-off events. [2021-08-13 02:36:20,663 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1469 conditions, 146 events. 0/146 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 267 event pairs, 0 based on Foata normal form. 49/195 useless extension candidates. Maximal degree in co-relation 0. Up to 49 conditions per place. [2021-08-13 02:36:20,664 INFO L132 encePairwiseOnDemand]: 147/149 looper letters, 0 selfloop transitions, 1 changer transitions 0/146 dead transitions. [2021-08-13 02:36:20,664 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 146 transitions, 2790 flow [2021-08-13 02:36:20,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2021-08-13 02:36:20,665 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9843400447427293 [2021-08-13 02:36:20,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2021-08-13 02:36:20,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2021-08-13 02:36:20,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:20,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2021-08-13 02:36:20,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,667 INFO L348 CegarLoopForPetriNet]: 244 programPoint places, 1 predicate places. [2021-08-13 02:36:20,667 INFO L482 AbstractCegarLoop]: Abstraction has has 245 places, 146 transitions, 2790 flow [2021-08-13 02:36:20,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,667 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:20,667 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:20,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-08-13 02:36:20,667 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:20,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:20,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1665236624, now seen corresponding path program 1 times [2021-08-13 02:36:20,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:20,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312158254] [2021-08-13 02:36:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:20,679 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:20,682 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:20,690 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:20,690 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:20,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-08-13 02:36:20,691 WARN L235 ceAbstractionStarter]: 48 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:20,691 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 49 thread instances. [2021-08-13 02:36:20,740 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:20,740 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:20,741 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:20,741 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:20,741 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:20,741 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:20,741 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:20,741 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:20,741 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:20,741 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:20,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 251 places, 152 transitions, 2901 flow [2021-08-13 02:36:20,794 INFO L129 PetriNetUnfolder]: 0/299 cut-off events. [2021-08-13 02:36:20,795 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 299 events. 0/299 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1001 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 0. Up to 50 conditions per place. [2021-08-13 02:36:20,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 152 transitions, 2901 flow [2021-08-13 02:36:20,797 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 249 places, 150 transitions, 2897 flow [2021-08-13 02:36:20,798 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:20,798 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,798 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:20,798 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:20,798 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:20,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:20,798 INFO L82 PathProgramCache]: Analyzing trace with hash 126499, now seen corresponding path program 1 times [2021-08-13 02:36:20,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:20,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137088722] [2021-08-13 02:36:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:20,809 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:20,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:20,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:20,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137088722] [2021-08-13 02:36:20,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137088722] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:20,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:20,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:20,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66623932] [2021-08-13 02:36:20,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:20,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:20,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:20,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:20,813 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 152 [2021-08-13 02:36:20,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 150 transitions, 2897 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:20,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 152 [2021-08-13 02:36:20,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:20,855 INFO L129 PetriNetUnfolder]: 0/149 cut-off events. [2021-08-13 02:36:20,855 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1524 conditions, 149 events. 0/149 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 297 event pairs, 0 based on Foata normal form. 50/199 useless extension candidates. Maximal degree in co-relation 0. Up to 50 conditions per place. [2021-08-13 02:36:20,856 INFO L132 encePairwiseOnDemand]: 150/152 looper letters, 0 selfloop transitions, 1 changer transitions 0/149 dead transitions. [2021-08-13 02:36:20,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 149 transitions, 2897 flow [2021-08-13 02:36:20,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2021-08-13 02:36:20,857 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9846491228070176 [2021-08-13 02:36:20,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2021-08-13 02:36:20,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2021-08-13 02:36:20,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:20,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2021-08-13 02:36:20,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,859 INFO L348 CegarLoopForPetriNet]: 249 programPoint places, 1 predicate places. [2021-08-13 02:36:20,859 INFO L482 AbstractCegarLoop]: Abstraction has has 250 places, 149 transitions, 2897 flow [2021-08-13 02:36:20,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:20,860 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:20,860 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:20,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-08-13 02:36:20,860 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:20,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:20,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2123002503, now seen corresponding path program 1 times [2021-08-13 02:36:20,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:20,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121090521] [2021-08-13 02:36:20,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:20,871 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:20,873 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:20,881 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:20,881 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:20,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-08-13 02:36:20,882 WARN L235 ceAbstractionStarter]: 49 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:20,882 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 50 thread instances. [2021-08-13 02:36:20,932 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:20,932 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:20,933 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:20,933 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:20,933 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:20,933 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:20,933 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:20,933 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:20,933 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:20,933 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:20,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 256 places, 155 transitions, 3010 flow [2021-08-13 02:36:20,990 INFO L129 PetriNetUnfolder]: 0/305 cut-off events. [2021-08-13 02:36:20,990 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 305 events. 0/305 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 978 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2021-08-13 02:36:20,990 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 155 transitions, 3010 flow [2021-08-13 02:36:20,992 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 254 places, 153 transitions, 3006 flow [2021-08-13 02:36:20,993 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:20,993 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:20,993 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:20,993 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:20,994 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:20,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:20,994 INFO L82 PathProgramCache]: Analyzing trace with hash 131459, now seen corresponding path program 1 times [2021-08-13 02:36:20,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:20,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14582258] [2021-08-13 02:36:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:21,006 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:21,006 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:21,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:21,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14582258] [2021-08-13 02:36:21,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14582258] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:21,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:21,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:21,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669940351] [2021-08-13 02:36:21,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:21,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:21,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:21,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:21,010 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 155 [2021-08-13 02:36:21,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 153 transitions, 3006 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:21,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 155 [2021-08-13 02:36:21,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:21,075 INFO L129 PetriNetUnfolder]: 0/152 cut-off events. [2021-08-13 02:36:21,076 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:21,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1580 conditions, 152 events. 0/152 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 275 event pairs, 0 based on Foata normal form. 51/203 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2021-08-13 02:36:21,076 INFO L132 encePairwiseOnDemand]: 153/155 looper letters, 0 selfloop transitions, 1 changer transitions 0/152 dead transitions. [2021-08-13 02:36:21,076 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 152 transitions, 3006 flow [2021-08-13 02:36:21,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2021-08-13 02:36:21,077 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9849462365591398 [2021-08-13 02:36:21,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2021-08-13 02:36:21,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2021-08-13 02:36:21,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:21,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2021-08-13 02:36:21,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,080 INFO L348 CegarLoopForPetriNet]: 254 programPoint places, 1 predicate places. [2021-08-13 02:36:21,080 INFO L482 AbstractCegarLoop]: Abstraction has has 255 places, 152 transitions, 3006 flow [2021-08-13 02:36:21,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,080 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:21,080 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:21,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-08-13 02:36:21,080 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:21,081 INFO L82 PathProgramCache]: Analyzing trace with hash 453703923, now seen corresponding path program 1 times [2021-08-13 02:36:21,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:21,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979340837] [2021-08-13 02:36:21,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:21,091 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:21,093 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:21,101 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:21,101 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:21,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-08-13 02:36:21,102 WARN L235 ceAbstractionStarter]: 50 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:21,102 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 51 thread instances. [2021-08-13 02:36:21,152 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:21,152 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:21,153 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:21,153 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:21,153 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:21,153 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:21,153 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:21,153 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:21,153 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:21,153 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:21,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 261 places, 158 transitions, 3121 flow [2021-08-13 02:36:21,210 INFO L129 PetriNetUnfolder]: 0/311 cut-off events. [2021-08-13 02:36:21,211 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:21,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1791 conditions, 311 events. 0/311 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1045 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 0. Up to 52 conditions per place. [2021-08-13 02:36:21,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 158 transitions, 3121 flow [2021-08-13 02:36:21,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 156 transitions, 3117 flow [2021-08-13 02:36:21,214 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:21,214 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:21,214 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:21,214 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:21,214 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:21,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:21,214 INFO L82 PathProgramCache]: Analyzing trace with hash 136515, now seen corresponding path program 1 times [2021-08-13 02:36:21,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:21,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687902473] [2021-08-13 02:36:21,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:21,225 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:21,226 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:21,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:21,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687902473] [2021-08-13 02:36:21,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687902473] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:21,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:21,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:21,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181630579] [2021-08-13 02:36:21,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:21,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:21,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:21,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:21,231 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 158 [2021-08-13 02:36:21,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 156 transitions, 3117 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:21,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 158 [2021-08-13 02:36:21,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:21,283 INFO L129 PetriNetUnfolder]: 0/155 cut-off events. [2021-08-13 02:36:21,283 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:21,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1637 conditions, 155 events. 0/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 301 event pairs, 0 based on Foata normal form. 52/207 useless extension candidates. Maximal degree in co-relation 0. Up to 52 conditions per place. [2021-08-13 02:36:21,284 INFO L132 encePairwiseOnDemand]: 156/158 looper letters, 0 selfloop transitions, 1 changer transitions 0/155 dead transitions. [2021-08-13 02:36:21,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 155 transitions, 3117 flow [2021-08-13 02:36:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2021-08-13 02:36:21,285 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9852320675105485 [2021-08-13 02:36:21,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2021-08-13 02:36:21,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2021-08-13 02:36:21,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:21,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2021-08-13 02:36:21,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,288 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,288 INFO L348 CegarLoopForPetriNet]: 259 programPoint places, 1 predicate places. [2021-08-13 02:36:21,288 INFO L482 AbstractCegarLoop]: Abstraction has has 260 places, 155 transitions, 3117 flow [2021-08-13 02:36:21,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,288 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:21,288 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:21,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-08-13 02:36:21,288 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:21,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:21,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1640419729, now seen corresponding path program 1 times [2021-08-13 02:36:21,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:21,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318351839] [2021-08-13 02:36:21,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:21,301 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:21,303 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:21,312 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:21,312 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:21,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-08-13 02:36:21,312 WARN L235 ceAbstractionStarter]: 51 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:21,312 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 52 thread instances. [2021-08-13 02:36:21,367 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:21,368 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:21,369 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:21,369 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:21,369 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:21,369 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:21,369 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:21,369 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:21,369 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:21,369 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:21,371 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 266 places, 161 transitions, 3234 flow [2021-08-13 02:36:21,432 INFO L129 PetriNetUnfolder]: 0/317 cut-off events. [2021-08-13 02:36:21,432 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:21,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 317 events. 0/317 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1047 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 0. Up to 53 conditions per place. [2021-08-13 02:36:21,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 161 transitions, 3234 flow [2021-08-13 02:36:21,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 159 transitions, 3230 flow [2021-08-13 02:36:21,435 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:21,435 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:21,436 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:21,436 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:21,436 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:21,437 INFO L82 PathProgramCache]: Analyzing trace with hash 141667, now seen corresponding path program 1 times [2021-08-13 02:36:21,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:21,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116400083] [2021-08-13 02:36:21,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:21,459 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:21,459 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:21,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:21,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116400083] [2021-08-13 02:36:21,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116400083] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:21,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:21,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:21,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023397599] [2021-08-13 02:36:21,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:21,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:21,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:21,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:21,464 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 161 [2021-08-13 02:36:21,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 159 transitions, 3230 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:21,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 161 [2021-08-13 02:36:21,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:21,510 INFO L129 PetriNetUnfolder]: 0/158 cut-off events. [2021-08-13 02:36:21,510 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:21,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1695 conditions, 158 events. 0/158 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 352 event pairs, 0 based on Foata normal form. 53/211 useless extension candidates. Maximal degree in co-relation 0. Up to 53 conditions per place. [2021-08-13 02:36:21,511 INFO L132 encePairwiseOnDemand]: 159/161 looper letters, 0 selfloop transitions, 1 changer transitions 0/158 dead transitions. [2021-08-13 02:36:21,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 158 transitions, 3230 flow [2021-08-13 02:36:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:21,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2021-08-13 02:36:21,512 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9855072463768116 [2021-08-13 02:36:21,512 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2021-08-13 02:36:21,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2021-08-13 02:36:21,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:21,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2021-08-13 02:36:21,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,514 INFO L348 CegarLoopForPetriNet]: 264 programPoint places, 1 predicate places. [2021-08-13 02:36:21,515 INFO L482 AbstractCegarLoop]: Abstraction has has 265 places, 158 transitions, 3230 flow [2021-08-13 02:36:21,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,515 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:21,515 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:21,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-08-13 02:36:21,515 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:21,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:21,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1202665654, now seen corresponding path program 1 times [2021-08-13 02:36:21,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:21,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551568892] [2021-08-13 02:36:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:21,527 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:21,529 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:21,538 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:21,538 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:21,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-08-13 02:36:21,538 WARN L235 ceAbstractionStarter]: 52 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:21,538 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 53 thread instances. [2021-08-13 02:36:21,616 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:21,616 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:21,617 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:21,617 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:21,617 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:21,617 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:21,617 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:21,617 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:21,617 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:21,617 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:21,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 271 places, 164 transitions, 3349 flow [2021-08-13 02:36:21,688 INFO L129 PetriNetUnfolder]: 0/323 cut-off events. [2021-08-13 02:36:21,689 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:21,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1914 conditions, 323 events. 0/323 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1029 event pairs, 0 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2021-08-13 02:36:21,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 164 transitions, 3349 flow [2021-08-13 02:36:21,691 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 162 transitions, 3345 flow [2021-08-13 02:36:21,692 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:21,692 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:21,692 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:21,692 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:21,692 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:21,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:21,693 INFO L82 PathProgramCache]: Analyzing trace with hash 146915, now seen corresponding path program 1 times [2021-08-13 02:36:21,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:21,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008687811] [2021-08-13 02:36:21,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:21,705 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:21,705 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:21,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:21,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008687811] [2021-08-13 02:36:21,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008687811] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:21,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:21,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:21,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023570345] [2021-08-13 02:36:21,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:21,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:21,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:21,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:21,710 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 164 [2021-08-13 02:36:21,710 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 162 transitions, 3345 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,710 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:21,710 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 164 [2021-08-13 02:36:21,711 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:21,765 INFO L129 PetriNetUnfolder]: 0/161 cut-off events. [2021-08-13 02:36:21,766 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:21,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 161 events. 0/161 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 304 event pairs, 0 based on Foata normal form. 54/215 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2021-08-13 02:36:21,766 INFO L132 encePairwiseOnDemand]: 162/164 looper letters, 0 selfloop transitions, 1 changer transitions 0/161 dead transitions. [2021-08-13 02:36:21,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 161 transitions, 3345 flow [2021-08-13 02:36:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2021-08-13 02:36:21,768 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9857723577235772 [2021-08-13 02:36:21,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2021-08-13 02:36:21,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2021-08-13 02:36:21,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:21,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2021-08-13 02:36:21,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,770 INFO L348 CegarLoopForPetriNet]: 269 programPoint places, 1 predicate places. [2021-08-13 02:36:21,770 INFO L482 AbstractCegarLoop]: Abstraction has has 270 places, 161 transitions, 3345 flow [2021-08-13 02:36:21,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,770 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:21,770 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:21,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-08-13 02:36:21,771 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:21,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:21,771 INFO L82 PathProgramCache]: Analyzing trace with hash -355666955, now seen corresponding path program 1 times [2021-08-13 02:36:21,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:21,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585168117] [2021-08-13 02:36:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:21,783 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:21,786 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:21,795 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:21,796 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:21,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-08-13 02:36:21,797 WARN L235 ceAbstractionStarter]: 53 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:21,797 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 54 thread instances. [2021-08-13 02:36:21,855 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:21,856 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:21,856 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:21,856 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:21,856 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:21,856 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:21,856 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:21,857 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:21,857 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:21,857 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:21,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 276 places, 167 transitions, 3466 flow [2021-08-13 02:36:21,937 INFO L129 PetriNetUnfolder]: 0/329 cut-off events. [2021-08-13 02:36:21,938 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:21,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1977 conditions, 329 events. 0/329 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1100 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2021-08-13 02:36:21,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 167 transitions, 3466 flow [2021-08-13 02:36:21,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 274 places, 165 transitions, 3462 flow [2021-08-13 02:36:21,941 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:21,941 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:21,941 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:21,942 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:21,942 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:21,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash 152259, now seen corresponding path program 1 times [2021-08-13 02:36:21,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:21,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720952682] [2021-08-13 02:36:21,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:21,954 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:21,954 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:21,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:21,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720952682] [2021-08-13 02:36:21,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720952682] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:21,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:21,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:21,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698819312] [2021-08-13 02:36:21,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:21,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:21,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:21,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:21,959 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 167 [2021-08-13 02:36:21,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 165 transitions, 3462 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:21,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:21,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 167 [2021-08-13 02:36:21,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:22,017 INFO L129 PetriNetUnfolder]: 0/164 cut-off events. [2021-08-13 02:36:22,017 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:22,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1814 conditions, 164 events. 0/164 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 324 event pairs, 0 based on Foata normal form. 55/219 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2021-08-13 02:36:22,018 INFO L132 encePairwiseOnDemand]: 165/167 looper letters, 0 selfloop transitions, 1 changer transitions 0/164 dead transitions. [2021-08-13 02:36:22,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 164 transitions, 3462 flow [2021-08-13 02:36:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:22,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2021-08-13 02:36:22,019 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9860279441117764 [2021-08-13 02:36:22,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2021-08-13 02:36:22,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2021-08-13 02:36:22,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:22,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2021-08-13 02:36:22,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,022 INFO L348 CegarLoopForPetriNet]: 274 programPoint places, 1 predicate places. [2021-08-13 02:36:22,022 INFO L482 AbstractCegarLoop]: Abstraction has has 275 places, 164 transitions, 3462 flow [2021-08-13 02:36:22,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,022 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:22,022 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:22,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-08-13 02:36:22,022 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:22,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:22,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1647836473, now seen corresponding path program 1 times [2021-08-13 02:36:22,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:22,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704106466] [2021-08-13 02:36:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:22,035 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:22,044 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:22,055 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:22,055 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:22,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-08-13 02:36:22,055 WARN L235 ceAbstractionStarter]: 54 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:22,055 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 55 thread instances. [2021-08-13 02:36:22,120 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:22,120 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:22,121 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:22,121 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:22,121 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:22,121 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:22,121 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:22,121 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:22,121 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:22,121 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:22,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 281 places, 170 transitions, 3585 flow [2021-08-13 02:36:22,196 INFO L129 PetriNetUnfolder]: 0/335 cut-off events. [2021-08-13 02:36:22,196 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:22,196 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2041 conditions, 335 events. 0/335 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1104 event pairs, 0 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 0. Up to 56 conditions per place. [2021-08-13 02:36:22,196 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 170 transitions, 3585 flow [2021-08-13 02:36:22,198 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 279 places, 168 transitions, 3581 flow [2021-08-13 02:36:22,199 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:22,199 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:22,199 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:22,199 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:22,199 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:22,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:22,200 INFO L82 PathProgramCache]: Analyzing trace with hash 157699, now seen corresponding path program 1 times [2021-08-13 02:36:22,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:22,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527632216] [2021-08-13 02:36:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:22,212 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,212 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:22,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:22,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527632216] [2021-08-13 02:36:22,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527632216] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:22,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:22,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:22,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818776899] [2021-08-13 02:36:22,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:22,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:22,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:22,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:22,216 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 170 [2021-08-13 02:36:22,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 168 transitions, 3581 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:22,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 170 [2021-08-13 02:36:22,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:22,268 INFO L129 PetriNetUnfolder]: 0/167 cut-off events. [2021-08-13 02:36:22,269 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:22,269 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1875 conditions, 167 events. 0/167 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 315 event pairs, 0 based on Foata normal form. 56/223 useless extension candidates. Maximal degree in co-relation 0. Up to 56 conditions per place. [2021-08-13 02:36:22,270 INFO L132 encePairwiseOnDemand]: 168/170 looper letters, 0 selfloop transitions, 1 changer transitions 0/167 dead transitions. [2021-08-13 02:36:22,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 167 transitions, 3581 flow [2021-08-13 02:36:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2021-08-13 02:36:22,270 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9862745098039216 [2021-08-13 02:36:22,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2021-08-13 02:36:22,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2021-08-13 02:36:22,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:22,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2021-08-13 02:36:22,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,272 INFO L348 CegarLoopForPetriNet]: 279 programPoint places, 1 predicate places. [2021-08-13 02:36:22,273 INFO L482 AbstractCegarLoop]: Abstraction has has 280 places, 167 transitions, 3581 flow [2021-08-13 02:36:22,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,273 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:22,273 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:22,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-08-13 02:36:22,273 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:22,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:22,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1816418341, now seen corresponding path program 1 times [2021-08-13 02:36:22,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:22,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516426873] [2021-08-13 02:36:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:22,286 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:22,288 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:22,298 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:22,299 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:22,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-08-13 02:36:22,299 WARN L235 ceAbstractionStarter]: 55 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:22,299 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 56 thread instances. [2021-08-13 02:36:22,358 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:22,358 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:22,359 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:22,359 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:22,359 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:22,359 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:22,359 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:22,359 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:22,359 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:22,359 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:22,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 286 places, 173 transitions, 3706 flow [2021-08-13 02:36:22,429 INFO L129 PetriNetUnfolder]: 0/341 cut-off events. [2021-08-13 02:36:22,429 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:22,429 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2106 conditions, 341 events. 0/341 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1077 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 0. Up to 57 conditions per place. [2021-08-13 02:36:22,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 286 places, 173 transitions, 3706 flow [2021-08-13 02:36:22,432 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 284 places, 171 transitions, 3702 flow [2021-08-13 02:36:22,432 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:22,432 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:22,432 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:22,433 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:22,433 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:22,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:22,433 INFO L82 PathProgramCache]: Analyzing trace with hash 163235, now seen corresponding path program 1 times [2021-08-13 02:36:22,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:22,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43323617] [2021-08-13 02:36:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:22,446 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,446 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:22,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:22,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43323617] [2021-08-13 02:36:22,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43323617] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:22,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:22,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:22,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135010913] [2021-08-13 02:36:22,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:22,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:22,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:22,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:22,476 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 173 [2021-08-13 02:36:22,477 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 171 transitions, 3702 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,477 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:22,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 173 [2021-08-13 02:36:22,477 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:22,528 INFO L129 PetriNetUnfolder]: 0/170 cut-off events. [2021-08-13 02:36:22,528 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:22,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 170 events. 0/170 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 316 event pairs, 0 based on Foata normal form. 57/227 useless extension candidates. Maximal degree in co-relation 0. Up to 57 conditions per place. [2021-08-13 02:36:22,529 INFO L132 encePairwiseOnDemand]: 171/173 looper letters, 0 selfloop transitions, 1 changer transitions 0/170 dead transitions. [2021-08-13 02:36:22,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 170 transitions, 3702 flow [2021-08-13 02:36:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:22,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:22,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2021-08-13 02:36:22,530 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9865125240847784 [2021-08-13 02:36:22,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2021-08-13 02:36:22,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2021-08-13 02:36:22,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:22,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2021-08-13 02:36:22,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,532 INFO L348 CegarLoopForPetriNet]: 284 programPoint places, 1 predicate places. [2021-08-13 02:36:22,532 INFO L482 AbstractCegarLoop]: Abstraction has has 285 places, 170 transitions, 3702 flow [2021-08-13 02:36:22,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,532 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:22,532 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:22,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-08-13 02:36:22,532 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:22,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:22,533 INFO L82 PathProgramCache]: Analyzing trace with hash 960217852, now seen corresponding path program 1 times [2021-08-13 02:36:22,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:22,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67591045] [2021-08-13 02:36:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:22,546 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:22,548 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:22,559 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:22,559 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:22,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-08-13 02:36:22,559 WARN L235 ceAbstractionStarter]: 56 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:22,559 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 57 thread instances. [2021-08-13 02:36:22,617 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:22,617 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:22,618 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:22,618 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:22,618 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:22,618 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:22,618 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:22,618 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:22,618 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:22,618 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:22,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 291 places, 176 transitions, 3829 flow [2021-08-13 02:36:22,689 INFO L129 PetriNetUnfolder]: 0/347 cut-off events. [2021-08-13 02:36:22,689 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:22,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2172 conditions, 347 events. 0/347 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1106 event pairs, 0 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 0. Up to 58 conditions per place. [2021-08-13 02:36:22,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 176 transitions, 3829 flow [2021-08-13 02:36:22,692 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 174 transitions, 3825 flow [2021-08-13 02:36:22,692 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:22,692 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:22,692 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:22,692 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:22,693 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:22,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:22,693 INFO L82 PathProgramCache]: Analyzing trace with hash 168867, now seen corresponding path program 1 times [2021-08-13 02:36:22,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:22,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779093064] [2021-08-13 02:36:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:22,705 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:22,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:22,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779093064] [2021-08-13 02:36:22,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779093064] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:22,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:22,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:22,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413757160] [2021-08-13 02:36:22,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:22,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:22,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:22,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:22,710 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 176 [2021-08-13 02:36:22,710 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 174 transitions, 3825 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,710 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:22,710 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 176 [2021-08-13 02:36:22,710 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:22,763 INFO L129 PetriNetUnfolder]: 0/173 cut-off events. [2021-08-13 02:36:22,763 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:22,763 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 173 events. 0/173 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 336 event pairs, 0 based on Foata normal form. 58/231 useless extension candidates. Maximal degree in co-relation 0. Up to 58 conditions per place. [2021-08-13 02:36:22,764 INFO L132 encePairwiseOnDemand]: 174/176 looper letters, 0 selfloop transitions, 1 changer transitions 0/173 dead transitions. [2021-08-13 02:36:22,764 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 173 transitions, 3825 flow [2021-08-13 02:36:22,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:22,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:22,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2021-08-13 02:36:22,765 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9867424242424242 [2021-08-13 02:36:22,765 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2021-08-13 02:36:22,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2021-08-13 02:36:22,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:22,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2021-08-13 02:36:22,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,767 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,767 INFO L348 CegarLoopForPetriNet]: 289 programPoint places, 1 predicate places. [2021-08-13 02:36:22,767 INFO L482 AbstractCegarLoop]: Abstraction has has 290 places, 173 transitions, 3825 flow [2021-08-13 02:36:22,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,767 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:22,767 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:22,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-08-13 02:36:22,767 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:22,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:22,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1458020769, now seen corresponding path program 1 times [2021-08-13 02:36:22,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:22,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452965503] [2021-08-13 02:36:22,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:22,781 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:22,783 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:22,793 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:22,794 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:22,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-08-13 02:36:22,794 WARN L235 ceAbstractionStarter]: 57 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:22,794 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 58 thread instances. [2021-08-13 02:36:22,852 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:22,853 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:22,855 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:22,855 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:22,855 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:22,855 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:22,855 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:22,855 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:22,855 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:22,855 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:22,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 296 places, 179 transitions, 3954 flow [2021-08-13 02:36:22,929 INFO L129 PetriNetUnfolder]: 0/353 cut-off events. [2021-08-13 02:36:22,929 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:22,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 353 events. 0/353 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1144 event pairs, 0 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2021-08-13 02:36:22,930 INFO L82 GeneralOperation]: Start removeDead. Operand has 296 places, 179 transitions, 3954 flow [2021-08-13 02:36:22,932 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 177 transitions, 3950 flow [2021-08-13 02:36:22,933 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:22,933 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:22,933 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:22,933 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:22,933 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:22,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:22,933 INFO L82 PathProgramCache]: Analyzing trace with hash 174595, now seen corresponding path program 1 times [2021-08-13 02:36:22,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:22,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474346788] [2021-08-13 02:36:22,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:22,947 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,947 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:22,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:22,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474346788] [2021-08-13 02:36:22,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474346788] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:22,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:22,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:22,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089881398] [2021-08-13 02:36:22,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:22,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:22,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:22,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:22,951 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 179 [2021-08-13 02:36:22,951 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 177 transitions, 3950 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:22,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 179 [2021-08-13 02:36:22,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:23,009 INFO L129 PetriNetUnfolder]: 0/176 cut-off events. [2021-08-13 02:36:23,009 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:23,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 176 events. 0/176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 314 event pairs, 0 based on Foata normal form. 59/235 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2021-08-13 02:36:23,010 INFO L132 encePairwiseOnDemand]: 177/179 looper letters, 0 selfloop transitions, 1 changer transitions 0/176 dead transitions. [2021-08-13 02:36:23,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 176 transitions, 3950 flow [2021-08-13 02:36:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 530 transitions. [2021-08-13 02:36:23,011 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9869646182495344 [2021-08-13 02:36:23,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 530 transitions. [2021-08-13 02:36:23,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 530 transitions. [2021-08-13 02:36:23,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:23,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 530 transitions. [2021-08-13 02:36:23,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,013 INFO L348 CegarLoopForPetriNet]: 294 programPoint places, 1 predicate places. [2021-08-13 02:36:23,013 INFO L482 AbstractCegarLoop]: Abstraction has has 295 places, 176 transitions, 3950 flow [2021-08-13 02:36:23,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,014 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:23,014 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:23,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-08-13 02:36:23,014 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:23,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:23,014 INFO L82 PathProgramCache]: Analyzing trace with hash 734709375, now seen corresponding path program 1 times [2021-08-13 02:36:23,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:23,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505960651] [2021-08-13 02:36:23,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:23,028 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:23,030 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:23,041 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:23,041 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:23,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-08-13 02:36:23,042 WARN L235 ceAbstractionStarter]: 58 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:23,042 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 59 thread instances. [2021-08-13 02:36:23,100 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:23,101 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:23,101 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:23,101 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:23,102 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:23,102 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:23,102 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:23,102 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:23,102 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:23,102 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:23,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 301 places, 182 transitions, 4081 flow [2021-08-13 02:36:23,176 INFO L129 PetriNetUnfolder]: 0/359 cut-off events. [2021-08-13 02:36:23,176 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:23,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2307 conditions, 359 events. 0/359 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1189 event pairs, 0 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2021-08-13 02:36:23,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 301 places, 182 transitions, 4081 flow [2021-08-13 02:36:23,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 180 transitions, 4077 flow [2021-08-13 02:36:23,180 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:23,180 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:23,180 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:23,180 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:23,180 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:23,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:23,180 INFO L82 PathProgramCache]: Analyzing trace with hash 180419, now seen corresponding path program 1 times [2021-08-13 02:36:23,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:23,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613320949] [2021-08-13 02:36:23,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:23,194 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,194 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:23,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:23,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613320949] [2021-08-13 02:36:23,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613320949] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:23,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:23,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:23,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784071818] [2021-08-13 02:36:23,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:23,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:23,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:23,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:23,199 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 182 [2021-08-13 02:36:23,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 180 transitions, 4077 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:23,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 182 [2021-08-13 02:36:23,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:23,287 INFO L129 PetriNetUnfolder]: 0/179 cut-off events. [2021-08-13 02:36:23,287 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:23,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2129 conditions, 179 events. 0/179 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 334 event pairs, 0 based on Foata normal form. 60/239 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2021-08-13 02:36:23,288 INFO L132 encePairwiseOnDemand]: 180/182 looper letters, 0 selfloop transitions, 1 changer transitions 0/179 dead transitions. [2021-08-13 02:36:23,288 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 179 transitions, 4077 flow [2021-08-13 02:36:23,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:23,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2021-08-13 02:36:23,291 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9871794871794872 [2021-08-13 02:36:23,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2021-08-13 02:36:23,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2021-08-13 02:36:23,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:23,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2021-08-13 02:36:23,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,293 INFO L348 CegarLoopForPetriNet]: 299 programPoint places, 1 predicate places. [2021-08-13 02:36:23,293 INFO L482 AbstractCegarLoop]: Abstraction has has 300 places, 179 transitions, 4077 flow [2021-08-13 02:36:23,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,293 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:23,294 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:23,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-08-13 02:36:23,294 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:23,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2013285399, now seen corresponding path program 1 times [2021-08-13 02:36:23,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:23,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873085021] [2021-08-13 02:36:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:23,308 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:23,310 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:23,320 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:23,320 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:23,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-08-13 02:36:23,321 WARN L235 ceAbstractionStarter]: 59 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:23,321 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 60 thread instances. [2021-08-13 02:36:23,381 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:23,382 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:23,382 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:23,382 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:23,382 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:23,382 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:23,382 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:23,382 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:23,383 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:23,383 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:23,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 306 places, 185 transitions, 4210 flow [2021-08-13 02:36:23,458 INFO L129 PetriNetUnfolder]: 0/365 cut-off events. [2021-08-13 02:36:23,458 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:23,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2376 conditions, 365 events. 0/365 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1222 event pairs, 0 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 0. Up to 61 conditions per place. [2021-08-13 02:36:23,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 306 places, 185 transitions, 4210 flow [2021-08-13 02:36:23,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 183 transitions, 4206 flow [2021-08-13 02:36:23,461 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:23,461 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:23,461 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:23,462 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:23,462 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:23,462 INFO L82 PathProgramCache]: Analyzing trace with hash 186339, now seen corresponding path program 1 times [2021-08-13 02:36:23,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:23,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939418658] [2021-08-13 02:36:23,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:23,477 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,477 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:23,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:23,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939418658] [2021-08-13 02:36:23,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939418658] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:23,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:23,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:23,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136685173] [2021-08-13 02:36:23,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:23,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:23,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:23,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:23,481 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 185 [2021-08-13 02:36:23,481 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 183 transitions, 4206 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:23,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 185 [2021-08-13 02:36:23,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:23,541 INFO L129 PetriNetUnfolder]: 0/182 cut-off events. [2021-08-13 02:36:23,541 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:23,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2195 conditions, 182 events. 0/182 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 343 event pairs, 0 based on Foata normal form. 61/243 useless extension candidates. Maximal degree in co-relation 0. Up to 61 conditions per place. [2021-08-13 02:36:23,542 INFO L132 encePairwiseOnDemand]: 183/185 looper letters, 0 selfloop transitions, 1 changer transitions 0/182 dead transitions. [2021-08-13 02:36:23,542 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 182 transitions, 4206 flow [2021-08-13 02:36:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:23,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2021-08-13 02:36:23,545 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9873873873873874 [2021-08-13 02:36:23,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2021-08-13 02:36:23,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2021-08-13 02:36:23,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:23,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2021-08-13 02:36:23,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,547 INFO L348 CegarLoopForPetriNet]: 304 programPoint places, 1 predicate places. [2021-08-13 02:36:23,547 INFO L482 AbstractCegarLoop]: Abstraction has has 305 places, 182 transitions, 4206 flow [2021-08-13 02:36:23,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,547 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:23,548 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:23,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-08-13 02:36:23,548 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:23,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:23,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1893663810, now seen corresponding path program 1 times [2021-08-13 02:36:23,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:23,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719338479] [2021-08-13 02:36:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:23,566 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:23,570 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:23,581 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:23,581 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:23,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-08-13 02:36:23,582 WARN L235 ceAbstractionStarter]: 60 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:23,582 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 61 thread instances. [2021-08-13 02:36:23,640 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:23,641 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:23,642 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:23,642 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:23,642 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:23,642 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:23,642 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:23,642 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:23,642 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:23,642 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:23,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 311 places, 188 transitions, 4341 flow [2021-08-13 02:36:23,719 INFO L129 PetriNetUnfolder]: 0/371 cut-off events. [2021-08-13 02:36:23,719 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:23,720 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2446 conditions, 371 events. 0/371 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1193 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2021-08-13 02:36:23,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 311 places, 188 transitions, 4341 flow [2021-08-13 02:36:23,722 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 309 places, 186 transitions, 4337 flow [2021-08-13 02:36:23,724 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:23,724 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:23,724 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:23,725 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:23,725 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:23,725 INFO L82 PathProgramCache]: Analyzing trace with hash 192355, now seen corresponding path program 1 times [2021-08-13 02:36:23,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:23,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68966104] [2021-08-13 02:36:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:23,738 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,739 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:23,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:23,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68966104] [2021-08-13 02:36:23,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68966104] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:23,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:23,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:23,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639119458] [2021-08-13 02:36:23,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:23,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:23,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:23,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:23,743 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 188 [2021-08-13 02:36:23,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 186 transitions, 4337 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:23,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 188 [2021-08-13 02:36:23,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:23,803 INFO L129 PetriNetUnfolder]: 0/185 cut-off events. [2021-08-13 02:36:23,803 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:23,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2262 conditions, 185 events. 0/185 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 392 event pairs, 0 based on Foata normal form. 62/247 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2021-08-13 02:36:23,804 INFO L132 encePairwiseOnDemand]: 186/188 looper letters, 0 selfloop transitions, 1 changer transitions 0/185 dead transitions. [2021-08-13 02:36:23,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 185 transitions, 4337 flow [2021-08-13 02:36:23,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:23,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:23,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2021-08-13 02:36:23,805 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9875886524822695 [2021-08-13 02:36:23,805 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2021-08-13 02:36:23,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2021-08-13 02:36:23,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:23,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2021-08-13 02:36:23,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,807 INFO L348 CegarLoopForPetriNet]: 309 programPoint places, 1 predicate places. [2021-08-13 02:36:23,807 INFO L482 AbstractCegarLoop]: Abstraction has has 310 places, 185 transitions, 4337 flow [2021-08-13 02:36:23,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,807 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:23,807 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:23,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-08-13 02:36:23,807 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:23,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1896631683, now seen corresponding path program 1 times [2021-08-13 02:36:23,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:23,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081478005] [2021-08-13 02:36:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:23,821 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:23,824 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:23,837 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:23,837 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:23,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-08-13 02:36:23,837 WARN L235 ceAbstractionStarter]: 61 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:23,837 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 62 thread instances. [2021-08-13 02:36:23,897 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:23,897 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:23,898 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:23,898 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:23,898 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:23,898 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:23,898 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:23,898 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:23,898 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:23,898 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:23,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 316 places, 191 transitions, 4474 flow [2021-08-13 02:36:24,003 INFO L129 PetriNetUnfolder]: 0/377 cut-off events. [2021-08-13 02:36:24,003 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:24,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2517 conditions, 377 events. 0/377 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1260 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2021-08-13 02:36:24,004 INFO L82 GeneralOperation]: Start removeDead. Operand has 316 places, 191 transitions, 4474 flow [2021-08-13 02:36:24,006 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 314 places, 189 transitions, 4470 flow [2021-08-13 02:36:24,007 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:24,007 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:24,007 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:24,007 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:24,007 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:24,008 INFO L82 PathProgramCache]: Analyzing trace with hash 198467, now seen corresponding path program 1 times [2021-08-13 02:36:24,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:24,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981632596] [2021-08-13 02:36:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:24,053 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,053 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:24,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:24,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981632596] [2021-08-13 02:36:24,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981632596] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:24,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:24,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:24,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659308354] [2021-08-13 02:36:24,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:24,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:24,057 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 191 [2021-08-13 02:36:24,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 189 transitions, 4470 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:24,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 191 [2021-08-13 02:36:24,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:24,118 INFO L129 PetriNetUnfolder]: 0/188 cut-off events. [2021-08-13 02:36:24,118 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:24,119 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2330 conditions, 188 events. 0/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 386 event pairs, 0 based on Foata normal form. 63/251 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2021-08-13 02:36:24,119 INFO L132 encePairwiseOnDemand]: 189/191 looper letters, 0 selfloop transitions, 1 changer transitions 0/188 dead transitions. [2021-08-13 02:36:24,119 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 188 transitions, 4470 flow [2021-08-13 02:36:24,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2021-08-13 02:36:24,120 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.987783595113438 [2021-08-13 02:36:24,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2021-08-13 02:36:24,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2021-08-13 02:36:24,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:24,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2021-08-13 02:36:24,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,122 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,122 INFO L348 CegarLoopForPetriNet]: 314 programPoint places, 1 predicate places. [2021-08-13 02:36:24,122 INFO L482 AbstractCegarLoop]: Abstraction has has 315 places, 188 transitions, 4470 flow [2021-08-13 02:36:24,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,122 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:24,122 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:24,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-08-13 02:36:24,123 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:24,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:24,123 INFO L82 PathProgramCache]: Analyzing trace with hash 617363653, now seen corresponding path program 1 times [2021-08-13 02:36:24,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:24,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262479205] [2021-08-13 02:36:24,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:24,138 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:24,141 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:24,155 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:24,155 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:24,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-08-13 02:36:24,156 WARN L235 ceAbstractionStarter]: 62 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:24,156 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 63 thread instances. [2021-08-13 02:36:24,216 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:24,217 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:24,217 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:24,217 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:24,217 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:24,218 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:24,218 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:24,218 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:24,218 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:24,218 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:24,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 321 places, 194 transitions, 4609 flow [2021-08-13 02:36:24,301 INFO L129 PetriNetUnfolder]: 0/383 cut-off events. [2021-08-13 02:36:24,301 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:24,302 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2589 conditions, 383 events. 0/383 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1404 event pairs, 0 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2021-08-13 02:36:24,302 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 194 transitions, 4609 flow [2021-08-13 02:36:24,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 319 places, 192 transitions, 4605 flow [2021-08-13 02:36:24,306 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:24,306 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:24,306 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:24,306 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:24,306 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:24,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:24,307 INFO L82 PathProgramCache]: Analyzing trace with hash 204675, now seen corresponding path program 1 times [2021-08-13 02:36:24,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:24,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881325035] [2021-08-13 02:36:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:24,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:24,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:24,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881325035] [2021-08-13 02:36:24,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881325035] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:24,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:24,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:24,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42191634] [2021-08-13 02:36:24,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:24,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:24,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:24,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:24,325 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 194 [2021-08-13 02:36:24,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 192 transitions, 4605 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:24,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 194 [2021-08-13 02:36:24,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:24,393 INFO L129 PetriNetUnfolder]: 0/191 cut-off events. [2021-08-13 02:36:24,393 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:24,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2399 conditions, 191 events. 0/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 374 event pairs, 0 based on Foata normal form. 64/255 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2021-08-13 02:36:24,394 INFO L132 encePairwiseOnDemand]: 192/194 looper letters, 0 selfloop transitions, 1 changer transitions 0/191 dead transitions. [2021-08-13 02:36:24,394 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 191 transitions, 4605 flow [2021-08-13 02:36:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2021-08-13 02:36:24,395 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9879725085910653 [2021-08-13 02:36:24,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2021-08-13 02:36:24,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2021-08-13 02:36:24,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:24,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2021-08-13 02:36:24,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,397 INFO L348 CegarLoopForPetriNet]: 319 programPoint places, 1 predicate places. [2021-08-13 02:36:24,397 INFO L482 AbstractCegarLoop]: Abstraction has has 320 places, 191 transitions, 4605 flow [2021-08-13 02:36:24,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,398 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:24,398 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:24,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-08-13 02:36:24,398 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:24,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1826160861, now seen corresponding path program 1 times [2021-08-13 02:36:24,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:24,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018646] [2021-08-13 02:36:24,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:24,414 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:24,421 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:24,433 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:24,434 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:24,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-08-13 02:36:24,434 WARN L235 ceAbstractionStarter]: 63 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:24,434 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 64 thread instances. [2021-08-13 02:36:24,499 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:24,500 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:24,500 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:24,500 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:24,501 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:24,501 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:24,501 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:24,501 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:24,501 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:24,501 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:24,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 326 places, 197 transitions, 4746 flow [2021-08-13 02:36:24,600 INFO L129 PetriNetUnfolder]: 0/389 cut-off events. [2021-08-13 02:36:24,600 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:24,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2662 conditions, 389 events. 0/389 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1407 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 0. Up to 65 conditions per place. [2021-08-13 02:36:24,601 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 197 transitions, 4746 flow [2021-08-13 02:36:24,605 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 195 transitions, 4742 flow [2021-08-13 02:36:24,605 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:24,605 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:24,605 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:24,605 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:24,605 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash 210979, now seen corresponding path program 1 times [2021-08-13 02:36:24,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:24,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434288487] [2021-08-13 02:36:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:24,631 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,633 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:24,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:24,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434288487] [2021-08-13 02:36:24,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434288487] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:24,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:24,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:24,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052308744] [2021-08-13 02:36:24,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:24,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:24,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:24,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:24,641 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 197 [2021-08-13 02:36:24,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 195 transitions, 4742 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:24,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 197 [2021-08-13 02:36:24,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:24,709 INFO L129 PetriNetUnfolder]: 0/194 cut-off events. [2021-08-13 02:36:24,710 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:24,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2469 conditions, 194 events. 0/194 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 424 event pairs, 0 based on Foata normal form. 65/259 useless extension candidates. Maximal degree in co-relation 0. Up to 65 conditions per place. [2021-08-13 02:36:24,712 INFO L132 encePairwiseOnDemand]: 195/197 looper letters, 0 selfloop transitions, 1 changer transitions 0/194 dead transitions. [2021-08-13 02:36:24,712 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 194 transitions, 4742 flow [2021-08-13 02:36:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:24,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:24,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2021-08-13 02:36:24,714 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.988155668358714 [2021-08-13 02:36:24,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2021-08-13 02:36:24,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2021-08-13 02:36:24,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:24,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2021-08-13 02:36:24,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,718 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,718 INFO L348 CegarLoopForPetriNet]: 324 programPoint places, 1 predicate places. [2021-08-13 02:36:24,718 INFO L482 AbstractCegarLoop]: Abstraction has has 325 places, 194 transitions, 4742 flow [2021-08-13 02:36:24,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,718 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:24,718 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:24,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-08-13 02:36:24,720 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:24,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:24,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1666195320, now seen corresponding path program 1 times [2021-08-13 02:36:24,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:24,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599787447] [2021-08-13 02:36:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:24,742 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:24,747 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:24,761 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:24,761 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:24,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-08-13 02:36:24,763 WARN L235 ceAbstractionStarter]: 64 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:24,763 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 65 thread instances. [2021-08-13 02:36:24,828 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:24,828 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:24,829 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:24,829 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:24,829 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:24,829 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:24,829 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:24,829 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:24,829 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:24,829 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:24,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 331 places, 200 transitions, 4885 flow [2021-08-13 02:36:24,966 INFO L129 PetriNetUnfolder]: 0/395 cut-off events. [2021-08-13 02:36:24,966 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:24,967 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2736 conditions, 395 events. 0/395 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1470 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2021-08-13 02:36:24,967 INFO L82 GeneralOperation]: Start removeDead. Operand has 331 places, 200 transitions, 4885 flow [2021-08-13 02:36:24,970 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 329 places, 198 transitions, 4881 flow [2021-08-13 02:36:24,971 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:24,971 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:24,971 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:24,971 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:24,971 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:24,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:24,972 INFO L82 PathProgramCache]: Analyzing trace with hash 217379, now seen corresponding path program 1 times [2021-08-13 02:36:24,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:24,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556661606] [2021-08-13 02:36:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:24,988 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:24,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:24,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556661606] [2021-08-13 02:36:24,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556661606] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:24,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:24,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:24,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004748794] [2021-08-13 02:36:24,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:24,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:24,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:24,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:24,994 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 200 [2021-08-13 02:36:24,995 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 198 transitions, 4881 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,995 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:24,995 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 200 [2021-08-13 02:36:24,995 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:25,080 INFO L129 PetriNetUnfolder]: 0/197 cut-off events. [2021-08-13 02:36:25,081 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:25,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2540 conditions, 197 events. 0/197 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 383 event pairs, 0 based on Foata normal form. 66/263 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2021-08-13 02:36:25,082 INFO L132 encePairwiseOnDemand]: 198/200 looper letters, 0 selfloop transitions, 1 changer transitions 0/197 dead transitions. [2021-08-13 02:36:25,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 197 transitions, 4881 flow [2021-08-13 02:36:25,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:25,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2021-08-13 02:36:25,083 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9883333333333333 [2021-08-13 02:36:25,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2021-08-13 02:36:25,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2021-08-13 02:36:25,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:25,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2021-08-13 02:36:25,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,086 INFO L348 CegarLoopForPetriNet]: 329 programPoint places, 1 predicate places. [2021-08-13 02:36:25,086 INFO L482 AbstractCegarLoop]: Abstraction has has 330 places, 197 transitions, 4881 flow [2021-08-13 02:36:25,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,086 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:25,086 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:25,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-08-13 02:36:25,086 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:25,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:25,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1308836489, now seen corresponding path program 1 times [2021-08-13 02:36:25,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:25,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118332461] [2021-08-13 02:36:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:25,103 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:25,107 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:25,120 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:25,121 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:25,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-08-13 02:36:25,121 WARN L235 ceAbstractionStarter]: 65 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:25,121 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 66 thread instances. [2021-08-13 02:36:25,233 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:25,233 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:25,234 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:25,234 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:25,234 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:25,234 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:25,234 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:25,234 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:25,235 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:25,235 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:25,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 336 places, 203 transitions, 5026 flow [2021-08-13 02:36:25,346 INFO L129 PetriNetUnfolder]: 0/401 cut-off events. [2021-08-13 02:36:25,346 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:25,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2811 conditions, 401 events. 0/401 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1504 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2021-08-13 02:36:25,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 203 transitions, 5026 flow [2021-08-13 02:36:25,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 334 places, 201 transitions, 5022 flow [2021-08-13 02:36:25,351 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:25,351 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:25,351 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:25,351 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:25,351 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:25,351 INFO L82 PathProgramCache]: Analyzing trace with hash 223875, now seen corresponding path program 1 times [2021-08-13 02:36:25,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:25,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72197345] [2021-08-13 02:36:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:25,368 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:25,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:25,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:25,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72197345] [2021-08-13 02:36:25,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72197345] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:25,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:25,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:25,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441812166] [2021-08-13 02:36:25,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:25,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:25,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:25,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:25,373 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 203 [2021-08-13 02:36:25,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 201 transitions, 5022 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:25,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 203 [2021-08-13 02:36:25,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:25,461 INFO L129 PetriNetUnfolder]: 0/200 cut-off events. [2021-08-13 02:36:25,461 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:25,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2612 conditions, 200 events. 0/200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 430 event pairs, 0 based on Foata normal form. 67/267 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2021-08-13 02:36:25,462 INFO L132 encePairwiseOnDemand]: 201/203 looper letters, 0 selfloop transitions, 1 changer transitions 0/200 dead transitions. [2021-08-13 02:36:25,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 200 transitions, 5022 flow [2021-08-13 02:36:25,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:25,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:25,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2021-08-13 02:36:25,464 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9885057471264368 [2021-08-13 02:36:25,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2021-08-13 02:36:25,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2021-08-13 02:36:25,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:25,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2021-08-13 02:36:25,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,467 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,467 INFO L348 CegarLoopForPetriNet]: 334 programPoint places, 1 predicate places. [2021-08-13 02:36:25,467 INFO L482 AbstractCegarLoop]: Abstraction has has 335 places, 200 transitions, 5022 flow [2021-08-13 02:36:25,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,467 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:25,468 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:25,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-08-13 02:36:25,468 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:25,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:25,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2145466379, now seen corresponding path program 1 times [2021-08-13 02:36:25,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:25,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016574469] [2021-08-13 02:36:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:25,488 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:25,506 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:25,521 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:25,521 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:25,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-08-13 02:36:25,521 WARN L235 ceAbstractionStarter]: 66 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:25,521 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 67 thread instances. [2021-08-13 02:36:25,595 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:25,596 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:25,597 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:25,597 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:25,597 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:25,597 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:25,597 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:25,597 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:25,597 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:25,597 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:25,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 341 places, 206 transitions, 5169 flow [2021-08-13 02:36:25,704 INFO L129 PetriNetUnfolder]: 0/407 cut-off events. [2021-08-13 02:36:25,704 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:25,705 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2887 conditions, 407 events. 0/407 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1495 event pairs, 0 based on Foata normal form. 0/339 useless extension candidates. Maximal degree in co-relation 0. Up to 68 conditions per place. [2021-08-13 02:36:25,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 341 places, 206 transitions, 5169 flow [2021-08-13 02:36:25,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 339 places, 204 transitions, 5165 flow [2021-08-13 02:36:25,709 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:25,709 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:25,709 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:25,709 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:25,709 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:25,709 INFO L82 PathProgramCache]: Analyzing trace with hash 230467, now seen corresponding path program 1 times [2021-08-13 02:36:25,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:25,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337179051] [2021-08-13 02:36:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:25,724 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:25,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:25,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:25,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337179051] [2021-08-13 02:36:25,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337179051] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:25,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:25,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:25,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149299439] [2021-08-13 02:36:25,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:25,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:25,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:25,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:25,729 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 206 [2021-08-13 02:36:25,729 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 204 transitions, 5165 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:25,729 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 206 [2021-08-13 02:36:25,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:25,804 INFO L129 PetriNetUnfolder]: 0/203 cut-off events. [2021-08-13 02:36:25,804 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:25,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 203 events. 0/203 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 397 event pairs, 0 based on Foata normal form. 68/271 useless extension candidates. Maximal degree in co-relation 0. Up to 68 conditions per place. [2021-08-13 02:36:25,806 INFO L132 encePairwiseOnDemand]: 204/206 looper letters, 0 selfloop transitions, 1 changer transitions 0/203 dead transitions. [2021-08-13 02:36:25,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 203 transitions, 5165 flow [2021-08-13 02:36:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:25,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2021-08-13 02:36:25,807 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.988673139158576 [2021-08-13 02:36:25,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2021-08-13 02:36:25,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2021-08-13 02:36:25,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:25,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2021-08-13 02:36:25,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,809 INFO L348 CegarLoopForPetriNet]: 339 programPoint places, 1 predicate places. [2021-08-13 02:36:25,809 INFO L482 AbstractCegarLoop]: Abstraction has has 340 places, 203 transitions, 5165 flow [2021-08-13 02:36:25,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,809 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:25,809 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:25,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-08-13 02:36:25,809 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:25,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:25,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1114350847, now seen corresponding path program 1 times [2021-08-13 02:36:25,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:25,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192125785] [2021-08-13 02:36:25,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:25,827 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:25,830 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:25,843 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:25,843 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:25,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-08-13 02:36:25,843 WARN L235 ceAbstractionStarter]: 67 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:25,843 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 68 thread instances. [2021-08-13 02:36:25,912 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:25,912 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:25,913 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:25,913 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:25,913 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:25,913 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:25,913 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:25,913 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:25,913 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:25,913 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:25,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 346 places, 209 transitions, 5314 flow [2021-08-13 02:36:26,012 INFO L129 PetriNetUnfolder]: 0/413 cut-off events. [2021-08-13 02:36:26,012 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:26,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2964 conditions, 413 events. 0/413 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1504 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 0. Up to 69 conditions per place. [2021-08-13 02:36:26,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 209 transitions, 5314 flow [2021-08-13 02:36:26,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 344 places, 207 transitions, 5310 flow [2021-08-13 02:36:26,017 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:26,017 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:26,017 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:26,017 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:26,017 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:26,017 INFO L82 PathProgramCache]: Analyzing trace with hash 237155, now seen corresponding path program 1 times [2021-08-13 02:36:26,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:26,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269262010] [2021-08-13 02:36:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:26,035 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,035 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:26,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:26,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269262010] [2021-08-13 02:36:26,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269262010] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:26,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:26,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:26,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715733127] [2021-08-13 02:36:26,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:26,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:26,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:26,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:26,039 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 209 [2021-08-13 02:36:26,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 207 transitions, 5310 flow. Second operand has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:26,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 209 [2021-08-13 02:36:26,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:26,208 INFO L129 PetriNetUnfolder]: 0/206 cut-off events. [2021-08-13 02:36:26,209 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:26,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2759 conditions, 206 events. 0/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 471 event pairs, 0 based on Foata normal form. 69/275 useless extension candidates. Maximal degree in co-relation 0. Up to 69 conditions per place. [2021-08-13 02:36:26,210 INFO L132 encePairwiseOnDemand]: 207/209 looper letters, 0 selfloop transitions, 1 changer transitions 0/206 dead transitions. [2021-08-13 02:36:26,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 206 transitions, 5310 flow [2021-08-13 02:36:26,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:26,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2021-08-13 02:36:26,210 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.988835725677831 [2021-08-13 02:36:26,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2021-08-13 02:36:26,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2021-08-13 02:36:26,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:26,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2021-08-13 02:36:26,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,212 INFO L348 CegarLoopForPetriNet]: 344 programPoint places, 1 predicate places. [2021-08-13 02:36:26,212 INFO L482 AbstractCegarLoop]: Abstraction has has 345 places, 206 transitions, 5310 flow [2021-08-13 02:36:26,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,213 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:26,213 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:26,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-08-13 02:36:26,213 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:26,213 INFO L82 PathProgramCache]: Analyzing trace with hash 660683726, now seen corresponding path program 1 times [2021-08-13 02:36:26,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:26,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357796915] [2021-08-13 02:36:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:26,230 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:26,233 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:26,251 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:26,251 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:26,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-08-13 02:36:26,251 WARN L235 ceAbstractionStarter]: 68 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:26,251 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 69 thread instances. [2021-08-13 02:36:26,317 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:26,318 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:26,318 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:26,318 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:26,319 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:26,319 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:26,319 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:26,319 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:26,319 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:26,319 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:26,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 351 places, 212 transitions, 5461 flow [2021-08-13 02:36:26,427 INFO L129 PetriNetUnfolder]: 0/419 cut-off events. [2021-08-13 02:36:26,427 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:26,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3042 conditions, 419 events. 0/419 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1556 event pairs, 0 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 0. Up to 70 conditions per place. [2021-08-13 02:36:26,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 351 places, 212 transitions, 5461 flow [2021-08-13 02:36:26,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 349 places, 210 transitions, 5457 flow [2021-08-13 02:36:26,432 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:26,432 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:26,432 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:26,432 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:26,432 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:26,432 INFO L82 PathProgramCache]: Analyzing trace with hash 243939, now seen corresponding path program 1 times [2021-08-13 02:36:26,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:26,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471015790] [2021-08-13 02:36:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:26,449 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,449 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:26,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:26,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471015790] [2021-08-13 02:36:26,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471015790] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:26,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:26,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:26,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819057128] [2021-08-13 02:36:26,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:26,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:26,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:26,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:26,453 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 212 [2021-08-13 02:36:26,454 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 210 transitions, 5457 flow. Second operand has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,454 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:26,454 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 212 [2021-08-13 02:36:26,454 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:26,539 INFO L129 PetriNetUnfolder]: 0/209 cut-off events. [2021-08-13 02:36:26,540 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:26,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2834 conditions, 209 events. 0/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 439 event pairs, 0 based on Foata normal form. 70/279 useless extension candidates. Maximal degree in co-relation 0. Up to 70 conditions per place. [2021-08-13 02:36:26,541 INFO L132 encePairwiseOnDemand]: 210/212 looper letters, 0 selfloop transitions, 1 changer transitions 0/209 dead transitions. [2021-08-13 02:36:26,541 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 209 transitions, 5457 flow [2021-08-13 02:36:26,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2021-08-13 02:36:26,542 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9889937106918238 [2021-08-13 02:36:26,542 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2021-08-13 02:36:26,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2021-08-13 02:36:26,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:26,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2021-08-13 02:36:26,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,544 INFO L348 CegarLoopForPetriNet]: 349 programPoint places, 1 predicate places. [2021-08-13 02:36:26,544 INFO L482 AbstractCegarLoop]: Abstraction has has 350 places, 209 transitions, 5457 flow [2021-08-13 02:36:26,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,544 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:26,544 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:26,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-08-13 02:36:26,544 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:26,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:26,545 INFO L82 PathProgramCache]: Analyzing trace with hash -754160187, now seen corresponding path program 1 times [2021-08-13 02:36:26,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:26,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369869097] [2021-08-13 02:36:26,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:26,562 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:26,565 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:26,580 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:26,580 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:26,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-08-13 02:36:26,580 WARN L235 ceAbstractionStarter]: 69 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:26,580 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 70 thread instances. [2021-08-13 02:36:26,652 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:26,653 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:26,653 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:26,653 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:26,653 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:26,653 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:26,653 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:26,653 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:26,653 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:26,653 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:26,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 356 places, 215 transitions, 5610 flow [2021-08-13 02:36:26,765 INFO L129 PetriNetUnfolder]: 0/425 cut-off events. [2021-08-13 02:36:26,765 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:26,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3121 conditions, 425 events. 0/425 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1580 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2021-08-13 02:36:26,765 INFO L82 GeneralOperation]: Start removeDead. Operand has 356 places, 215 transitions, 5610 flow [2021-08-13 02:36:26,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 354 places, 213 transitions, 5606 flow [2021-08-13 02:36:26,769 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:26,769 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:26,769 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:26,769 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:26,770 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:26,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:26,770 INFO L82 PathProgramCache]: Analyzing trace with hash 250819, now seen corresponding path program 1 times [2021-08-13 02:36:26,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:26,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369752339] [2021-08-13 02:36:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:26,786 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,790 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:26,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:26,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369752339] [2021-08-13 02:36:26,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369752339] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:26,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:26,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:26,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624451434] [2021-08-13 02:36:26,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:26,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:26,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:26,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:26,795 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 215 [2021-08-13 02:36:26,795 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 213 transitions, 5606 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,795 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:26,795 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 215 [2021-08-13 02:36:26,795 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:26,881 INFO L129 PetriNetUnfolder]: 0/212 cut-off events. [2021-08-13 02:36:26,882 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:26,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2910 conditions, 212 events. 0/212 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 448 event pairs, 0 based on Foata normal form. 71/283 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2021-08-13 02:36:26,883 INFO L132 encePairwiseOnDemand]: 213/215 looper letters, 0 selfloop transitions, 1 changer transitions 0/212 dead transitions. [2021-08-13 02:36:26,883 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 212 transitions, 5606 flow [2021-08-13 02:36:26,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:26,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 638 transitions. [2021-08-13 02:36:26,884 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9891472868217054 [2021-08-13 02:36:26,884 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 638 transitions. [2021-08-13 02:36:26,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 638 transitions. [2021-08-13 02:36:26,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:26,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 638 transitions. [2021-08-13 02:36:26,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,886 INFO L348 CegarLoopForPetriNet]: 354 programPoint places, 1 predicate places. [2021-08-13 02:36:26,886 INFO L482 AbstractCegarLoop]: Abstraction has has 355 places, 212 transitions, 5606 flow [2021-08-13 02:36:26,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,886 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:26,886 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:26,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-08-13 02:36:26,886 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:26,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1018517423, now seen corresponding path program 1 times [2021-08-13 02:36:26,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:26,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901300953] [2021-08-13 02:36:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:26,903 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:26,906 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:26,921 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:26,921 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:26,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-08-13 02:36:26,922 WARN L235 ceAbstractionStarter]: 70 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:26,922 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 71 thread instances. [2021-08-13 02:36:26,991 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:26,991 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:26,992 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:26,992 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:26,992 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:26,992 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:26,992 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:26,992 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:26,992 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:26,992 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:26,995 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 361 places, 218 transitions, 5761 flow [2021-08-13 02:36:27,110 INFO L129 PetriNetUnfolder]: 0/431 cut-off events. [2021-08-13 02:36:27,110 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:27,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3201 conditions, 431 events. 0/431 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1611 event pairs, 0 based on Foata normal form. 0/359 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2021-08-13 02:36:27,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 361 places, 218 transitions, 5761 flow [2021-08-13 02:36:27,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 359 places, 216 transitions, 5757 flow [2021-08-13 02:36:27,115 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:27,115 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:27,115 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:27,115 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:27,115 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:27,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:27,115 INFO L82 PathProgramCache]: Analyzing trace with hash 257795, now seen corresponding path program 1 times [2021-08-13 02:36:27,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:27,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979278090] [2021-08-13 02:36:27,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:27,131 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:27,132 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:27,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:27,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979278090] [2021-08-13 02:36:27,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979278090] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:27,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:27,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:27,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844342441] [2021-08-13 02:36:27,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:27,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:27,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:27,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:27,136 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 218 [2021-08-13 02:36:27,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 216 transitions, 5757 flow. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:27,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 218 [2021-08-13 02:36:27,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:27,226 INFO L129 PetriNetUnfolder]: 0/215 cut-off events. [2021-08-13 02:36:27,227 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:27,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2987 conditions, 215 events. 0/215 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 414 event pairs, 0 based on Foata normal form. 72/287 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2021-08-13 02:36:27,228 INFO L132 encePairwiseOnDemand]: 216/218 looper letters, 0 selfloop transitions, 1 changer transitions 0/215 dead transitions. [2021-08-13 02:36:27,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 215 transitions, 5757 flow [2021-08-13 02:36:27,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2021-08-13 02:36:27,229 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9892966360856269 [2021-08-13 02:36:27,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2021-08-13 02:36:27,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2021-08-13 02:36:27,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:27,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2021-08-13 02:36:27,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,231 INFO L348 CegarLoopForPetriNet]: 359 programPoint places, 1 predicate places. [2021-08-13 02:36:27,231 INFO L482 AbstractCegarLoop]: Abstraction has has 360 places, 215 transitions, 5757 flow [2021-08-13 02:36:27,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,231 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:27,231 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:27,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-08-13 02:36:27,232 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:27,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:27,232 INFO L82 PathProgramCache]: Analyzing trace with hash -640033195, now seen corresponding path program 1 times [2021-08-13 02:36:27,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:27,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065813735] [2021-08-13 02:36:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:27,250 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:27,252 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:27,269 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:27,269 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:27,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-08-13 02:36:27,270 WARN L235 ceAbstractionStarter]: 71 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:27,270 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 72 thread instances. [2021-08-13 02:36:27,383 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:27,383 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:27,384 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:27,384 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:27,384 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:27,384 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:27,384 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:27,384 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:27,384 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:27,384 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:27,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 366 places, 221 transitions, 5914 flow [2021-08-13 02:36:27,517 INFO L129 PetriNetUnfolder]: 0/437 cut-off events. [2021-08-13 02:36:27,517 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:27,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3282 conditions, 437 events. 0/437 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1544 event pairs, 0 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 0. Up to 73 conditions per place. [2021-08-13 02:36:27,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 366 places, 221 transitions, 5914 flow [2021-08-13 02:36:27,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 364 places, 219 transitions, 5910 flow [2021-08-13 02:36:27,522 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:27,522 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:27,522 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:27,522 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:27,522 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:27,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:27,522 INFO L82 PathProgramCache]: Analyzing trace with hash 264867, now seen corresponding path program 1 times [2021-08-13 02:36:27,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:27,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256940457] [2021-08-13 02:36:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:27,540 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:27,540 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:27,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:27,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256940457] [2021-08-13 02:36:27,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256940457] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:27,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:27,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:27,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69697864] [2021-08-13 02:36:27,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:27,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:27,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:27,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:27,545 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 221 [2021-08-13 02:36:27,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 219 transitions, 5910 flow. Second operand has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:27,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 221 [2021-08-13 02:36:27,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:27,635 INFO L129 PetriNetUnfolder]: 0/218 cut-off events. [2021-08-13 02:36:27,635 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:27,635 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3065 conditions, 218 events. 0/218 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 477 event pairs, 0 based on Foata normal form. 73/291 useless extension candidates. Maximal degree in co-relation 0. Up to 73 conditions per place. [2021-08-13 02:36:27,636 INFO L132 encePairwiseOnDemand]: 219/221 looper letters, 0 selfloop transitions, 1 changer transitions 0/218 dead transitions. [2021-08-13 02:36:27,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 218 transitions, 5910 flow [2021-08-13 02:36:27,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 656 transitions. [2021-08-13 02:36:27,638 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9894419306184012 [2021-08-13 02:36:27,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 656 transitions. [2021-08-13 02:36:27,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 656 transitions. [2021-08-13 02:36:27,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:27,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 656 transitions. [2021-08-13 02:36:27,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,640 INFO L348 CegarLoopForPetriNet]: 364 programPoint places, 1 predicate places. [2021-08-13 02:36:27,640 INFO L482 AbstractCegarLoop]: Abstraction has has 365 places, 218 transitions, 5910 flow [2021-08-13 02:36:27,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,640 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:27,640 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:27,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-08-13 02:36:27,640 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:27,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:27,641 INFO L82 PathProgramCache]: Analyzing trace with hash -968754668, now seen corresponding path program 1 times [2021-08-13 02:36:27,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:27,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532947297] [2021-08-13 02:36:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:27,657 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:27,661 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:27,676 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:27,676 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:27,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-08-13 02:36:27,677 WARN L235 ceAbstractionStarter]: 72 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:27,677 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 73 thread instances. [2021-08-13 02:36:27,749 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:27,749 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:27,750 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:27,750 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:27,750 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:27,750 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:27,750 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:27,750 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:27,750 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:27,750 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:27,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 371 places, 224 transitions, 6069 flow [2021-08-13 02:36:27,863 INFO L129 PetriNetUnfolder]: 0/443 cut-off events. [2021-08-13 02:36:27,863 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:27,863 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3364 conditions, 443 events. 0/443 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1645 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 0. Up to 74 conditions per place. [2021-08-13 02:36:27,863 INFO L82 GeneralOperation]: Start removeDead. Operand has 371 places, 224 transitions, 6069 flow [2021-08-13 02:36:27,868 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 369 places, 222 transitions, 6065 flow [2021-08-13 02:36:27,869 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:27,869 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:27,869 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:27,869 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:27,869 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:27,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:27,869 INFO L82 PathProgramCache]: Analyzing trace with hash 272035, now seen corresponding path program 1 times [2021-08-13 02:36:27,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:27,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856075711] [2021-08-13 02:36:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:27,887 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:27,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:27,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:27,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856075711] [2021-08-13 02:36:27,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856075711] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:27,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:27,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:27,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176868018] [2021-08-13 02:36:27,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:27,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:27,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:27,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:27,892 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 224 [2021-08-13 02:36:27,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 222 transitions, 6065 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,892 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:27,892 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 224 [2021-08-13 02:36:27,892 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:27,981 INFO L129 PetriNetUnfolder]: 0/221 cut-off events. [2021-08-13 02:36:27,981 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:27,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 221 events. 0/221 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 423 event pairs, 0 based on Foata normal form. 74/295 useless extension candidates. Maximal degree in co-relation 0. Up to 74 conditions per place. [2021-08-13 02:36:27,982 INFO L132 encePairwiseOnDemand]: 222/224 looper letters, 0 selfloop transitions, 1 changer transitions 0/221 dead transitions. [2021-08-13 02:36:27,982 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 221 transitions, 6065 flow [2021-08-13 02:36:27,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 665 transitions. [2021-08-13 02:36:27,983 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9895833333333334 [2021-08-13 02:36:27,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 665 transitions. [2021-08-13 02:36:27,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 665 transitions. [2021-08-13 02:36:27,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:27,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 665 transitions. [2021-08-13 02:36:27,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,987 INFO L348 CegarLoopForPetriNet]: 369 programPoint places, 1 predicate places. [2021-08-13 02:36:27,987 INFO L482 AbstractCegarLoop]: Abstraction has has 370 places, 221 transitions, 6065 flow [2021-08-13 02:36:27,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,987 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:27,987 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:27,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-08-13 02:36:27,987 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:27,987 INFO L82 PathProgramCache]: Analyzing trace with hash -219590607, now seen corresponding path program 1 times [2021-08-13 02:36:27,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:27,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568573291] [2021-08-13 02:36:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:28,005 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:28,007 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:28,023 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:28,023 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:28,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-08-13 02:36:28,023 WARN L235 ceAbstractionStarter]: 73 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:28,023 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 74 thread instances. [2021-08-13 02:36:28,094 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:28,095 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:28,095 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:28,095 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:28,095 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:28,095 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:28,095 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:28,095 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:28,095 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:28,095 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:28,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 376 places, 227 transitions, 6226 flow [2021-08-13 02:36:28,211 INFO L129 PetriNetUnfolder]: 0/449 cut-off events. [2021-08-13 02:36:28,212 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:28,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3447 conditions, 449 events. 0/449 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1675 event pairs, 0 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2021-08-13 02:36:28,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 376 places, 227 transitions, 6226 flow [2021-08-13 02:36:28,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 374 places, 225 transitions, 6222 flow [2021-08-13 02:36:28,216 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:28,216 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:28,216 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:28,216 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:28,216 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:28,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:28,216 INFO L82 PathProgramCache]: Analyzing trace with hash 279299, now seen corresponding path program 1 times [2021-08-13 02:36:28,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:28,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411552836] [2021-08-13 02:36:28,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:28,233 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:28,234 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:28,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:28,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411552836] [2021-08-13 02:36:28,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411552836] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:28,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:28,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:28,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697752602] [2021-08-13 02:36:28,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:28,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:28,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:28,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:28,238 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 227 [2021-08-13 02:36:28,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 225 transitions, 6222 flow. Second operand has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:28,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:28,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 227 [2021-08-13 02:36:28,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:28,328 INFO L129 PetriNetUnfolder]: 0/224 cut-off events. [2021-08-13 02:36:28,329 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:28,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3224 conditions, 224 events. 0/224 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 488 event pairs, 0 based on Foata normal form. 75/299 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2021-08-13 02:36:28,330 INFO L132 encePairwiseOnDemand]: 225/227 looper letters, 0 selfloop transitions, 1 changer transitions 0/224 dead transitions. [2021-08-13 02:36:28,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 224 transitions, 6222 flow [2021-08-13 02:36:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:28,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 674 transitions. [2021-08-13 02:36:28,331 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9897209985315712 [2021-08-13 02:36:28,331 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 674 transitions. [2021-08-13 02:36:28,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 674 transitions. [2021-08-13 02:36:28,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:28,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 674 transitions. [2021-08-13 02:36:28,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:28,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:28,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:28,333 INFO L348 CegarLoopForPetriNet]: 374 programPoint places, 1 predicate places. [2021-08-13 02:36:28,333 INFO L482 AbstractCegarLoop]: Abstraction has has 375 places, 224 transitions, 6222 flow [2021-08-13 02:36:28,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:28,333 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:28,333 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:28,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-08-13 02:36:28,333 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:28,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:28,334 INFO L82 PathProgramCache]: Analyzing trace with hash 384134551, now seen corresponding path program 1 times [2021-08-13 02:36:28,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:28,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825873970] [2021-08-13 02:36:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:28,352 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:28,354 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:28,370 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:28,370 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:28,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-08-13 02:36:28,370 WARN L235 ceAbstractionStarter]: 74 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:28,370 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 75 thread instances. [2021-08-13 02:36:28,442 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:28,443 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:28,443 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:28,443 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:28,443 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:28,444 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:28,444 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:28,444 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:28,444 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:28,444 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:28,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 381 places, 230 transitions, 6385 flow [2021-08-13 02:36:28,598 INFO L129 PetriNetUnfolder]: 0/455 cut-off events. [2021-08-13 02:36:28,598 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:28,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3531 conditions, 455 events. 0/455 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1673 event pairs, 0 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2021-08-13 02:36:28,599 INFO L82 GeneralOperation]: Start removeDead. Operand has 381 places, 230 transitions, 6385 flow [2021-08-13 02:36:28,602 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 379 places, 228 transitions, 6381 flow [2021-08-13 02:36:28,603 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:28,603 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:28,603 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:28,603 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:28,603 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:28,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:28,603 INFO L82 PathProgramCache]: Analyzing trace with hash 286659, now seen corresponding path program 1 times [2021-08-13 02:36:28,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:28,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426093369] [2021-08-13 02:36:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:28,620 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:28,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:28,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:28,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426093369] [2021-08-13 02:36:28,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426093369] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:28,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:28,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:28,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246397450] [2021-08-13 02:36:28,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:28,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:28,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:28,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:28,625 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 230 [2021-08-13 02:36:28,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 228 transitions, 6381 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:28,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:28,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 230 [2021-08-13 02:36:28,626 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:28,719 INFO L129 PetriNetUnfolder]: 0/227 cut-off events. [2021-08-13 02:36:28,720 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:28,720 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3305 conditions, 227 events. 0/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 439 event pairs, 0 based on Foata normal form. 76/303 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2021-08-13 02:36:28,721 INFO L132 encePairwiseOnDemand]: 228/230 looper letters, 0 selfloop transitions, 1 changer transitions 0/227 dead transitions. [2021-08-13 02:36:28,721 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 227 transitions, 6381 flow [2021-08-13 02:36:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:28,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:28,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2021-08-13 02:36:28,722 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9898550724637681 [2021-08-13 02:36:28,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2021-08-13 02:36:28,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2021-08-13 02:36:28,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:28,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2021-08-13 02:36:28,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:28,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:28,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:28,724 INFO L348 CegarLoopForPetriNet]: 379 programPoint places, 1 predicate places. [2021-08-13 02:36:28,724 INFO L482 AbstractCegarLoop]: Abstraction has has 380 places, 227 transitions, 6381 flow [2021-08-13 02:36:28,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:28,724 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:28,724 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:28,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2021-08-13 02:36:28,724 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:28,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:28,725 INFO L82 PathProgramCache]: Analyzing trace with hash 808822489, now seen corresponding path program 1 times [2021-08-13 02:36:28,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:28,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868829696] [2021-08-13 02:36:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:28,743 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:28,746 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:28,763 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:28,763 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:28,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-08-13 02:36:28,763 WARN L235 ceAbstractionStarter]: 75 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:28,763 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 76 thread instances. [2021-08-13 02:36:28,841 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:28,842 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:28,842 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:28,842 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:28,842 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:28,842 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:28,843 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:28,843 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:28,843 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:28,843 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:28,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 386 places, 233 transitions, 6546 flow [2021-08-13 02:36:28,973 INFO L129 PetriNetUnfolder]: 0/461 cut-off events. [2021-08-13 02:36:28,973 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:28,973 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 461 events. 0/461 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1682 event pairs, 0 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 0. Up to 77 conditions per place. [2021-08-13 02:36:28,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 233 transitions, 6546 flow [2021-08-13 02:36:28,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 384 places, 231 transitions, 6542 flow [2021-08-13 02:36:28,978 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:28,978 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:28,978 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:28,978 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:28,978 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:28,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:28,978 INFO L82 PathProgramCache]: Analyzing trace with hash 294115, now seen corresponding path program 1 times [2021-08-13 02:36:28,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:28,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109828343] [2021-08-13 02:36:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:28,997 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:28,997 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:29,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:29,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109828343] [2021-08-13 02:36:29,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109828343] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:29,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:29,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:29,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580011199] [2021-08-13 02:36:29,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:29,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:29,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:29,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:29,002 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 233 [2021-08-13 02:36:29,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 231 transitions, 6542 flow. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:29,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:29,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 233 [2021-08-13 02:36:29,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:29,099 INFO L129 PetriNetUnfolder]: 0/230 cut-off events. [2021-08-13 02:36:29,099 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:29,100 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3387 conditions, 230 events. 0/230 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 393 event pairs, 0 based on Foata normal form. 77/307 useless extension candidates. Maximal degree in co-relation 0. Up to 77 conditions per place. [2021-08-13 02:36:29,100 INFO L132 encePairwiseOnDemand]: 231/233 looper letters, 0 selfloop transitions, 1 changer transitions 0/230 dead transitions. [2021-08-13 02:36:29,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 230 transitions, 6542 flow [2021-08-13 02:36:29,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:29,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2021-08-13 02:36:29,101 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9899856938483548 [2021-08-13 02:36:29,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2021-08-13 02:36:29,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2021-08-13 02:36:29,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:29,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2021-08-13 02:36:29,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:29,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:29,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:29,103 INFO L348 CegarLoopForPetriNet]: 384 programPoint places, 1 predicate places. [2021-08-13 02:36:29,104 INFO L482 AbstractCegarLoop]: Abstraction has has 385 places, 230 transitions, 6542 flow [2021-08-13 02:36:29,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:29,104 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:29,104 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:29,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-08-13 02:36:29,104 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:29,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:29,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2026045606, now seen corresponding path program 1 times [2021-08-13 02:36:29,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:29,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609665624] [2021-08-13 02:36:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:29,124 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:29,126 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:29,143 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:29,143 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:29,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-08-13 02:36:29,144 WARN L235 ceAbstractionStarter]: 76 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:29,144 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 77 thread instances. [2021-08-13 02:36:29,222 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:29,223 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:29,223 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:29,223 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:29,223 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:29,223 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:29,223 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:29,223 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:29,223 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:29,223 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:29,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 391 places, 236 transitions, 6709 flow [2021-08-13 02:36:29,358 INFO L129 PetriNetUnfolder]: 0/467 cut-off events. [2021-08-13 02:36:29,358 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:29,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3702 conditions, 467 events. 0/467 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1767 event pairs, 0 based on Foata normal form. 0/389 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2021-08-13 02:36:29,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 391 places, 236 transitions, 6709 flow [2021-08-13 02:36:29,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 389 places, 234 transitions, 6705 flow [2021-08-13 02:36:29,363 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:29,363 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:29,363 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:29,363 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:29,363 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:29,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:29,364 INFO L82 PathProgramCache]: Analyzing trace with hash 301667, now seen corresponding path program 1 times [2021-08-13 02:36:29,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:29,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589776362] [2021-08-13 02:36:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:29,393 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:29,393 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:29,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:29,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589776362] [2021-08-13 02:36:29,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589776362] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:29,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:29,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:29,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626808110] [2021-08-13 02:36:29,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:29,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:29,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:29,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:29,398 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 236 [2021-08-13 02:36:29,399 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 234 transitions, 6705 flow. Second operand has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:29,399 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:29,399 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 236 [2021-08-13 02:36:29,399 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:29,500 INFO L129 PetriNetUnfolder]: 0/233 cut-off events. [2021-08-13 02:36:29,500 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:29,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3470 conditions, 233 events. 0/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 437 event pairs, 0 based on Foata normal form. 78/311 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2021-08-13 02:36:29,501 INFO L132 encePairwiseOnDemand]: 234/236 looper letters, 0 selfloop transitions, 1 changer transitions 0/233 dead transitions. [2021-08-13 02:36:29,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 233 transitions, 6705 flow [2021-08-13 02:36:29,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:29,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:29,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 701 transitions. [2021-08-13 02:36:29,502 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9901129943502824 [2021-08-13 02:36:29,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 701 transitions. [2021-08-13 02:36:29,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 701 transitions. [2021-08-13 02:36:29,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:29,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 701 transitions. [2021-08-13 02:36:29,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:29,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:29,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:29,504 INFO L348 CegarLoopForPetriNet]: 389 programPoint places, 1 predicate places. [2021-08-13 02:36:29,504 INFO L482 AbstractCegarLoop]: Abstraction has has 390 places, 233 transitions, 6705 flow [2021-08-13 02:36:29,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:29,505 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:29,505 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:29,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-08-13 02:36:29,505 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1437071923, now seen corresponding path program 1 times [2021-08-13 02:36:29,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:29,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303392102] [2021-08-13 02:36:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:29,525 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:29,528 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:29,619 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:29,620 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:29,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-08-13 02:36:29,620 WARN L235 ceAbstractionStarter]: 77 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:29,620 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 78 thread instances. [2021-08-13 02:36:29,705 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:29,706 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:29,706 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:29,706 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:29,707 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:29,707 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:29,707 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:29,707 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:29,707 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:29,707 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:29,710 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 396 places, 239 transitions, 6874 flow [2021-08-13 02:36:29,857 INFO L129 PetriNetUnfolder]: 0/473 cut-off events. [2021-08-13 02:36:29,858 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:29,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3789 conditions, 473 events. 0/473 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1766 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2021-08-13 02:36:29,858 INFO L82 GeneralOperation]: Start removeDead. Operand has 396 places, 239 transitions, 6874 flow [2021-08-13 02:36:29,862 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 394 places, 237 transitions, 6870 flow [2021-08-13 02:36:29,862 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:29,862 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:29,862 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:29,862 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:29,863 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:29,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:29,863 INFO L82 PathProgramCache]: Analyzing trace with hash 309315, now seen corresponding path program 1 times [2021-08-13 02:36:29,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:29,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476101843] [2021-08-13 02:36:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:29,887 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:29,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:29,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:29,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476101843] [2021-08-13 02:36:29,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476101843] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:29,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:29,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:29,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416776107] [2021-08-13 02:36:29,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:29,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:29,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:29,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:29,893 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 239 [2021-08-13 02:36:29,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 237 transitions, 6870 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:29,893 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:29,893 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 239 [2021-08-13 02:36:29,893 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:30,011 INFO L129 PetriNetUnfolder]: 0/236 cut-off events. [2021-08-13 02:36:30,011 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:30,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3554 conditions, 236 events. 0/236 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 479 event pairs, 0 based on Foata normal form. 79/315 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2021-08-13 02:36:30,012 INFO L132 encePairwiseOnDemand]: 237/239 looper letters, 0 selfloop transitions, 1 changer transitions 0/236 dead transitions. [2021-08-13 02:36:30,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 236 transitions, 6870 flow [2021-08-13 02:36:30,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2021-08-13 02:36:30,013 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9902370990237099 [2021-08-13 02:36:30,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2021-08-13 02:36:30,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2021-08-13 02:36:30,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:30,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2021-08-13 02:36:30,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,016 INFO L348 CegarLoopForPetriNet]: 394 programPoint places, 1 predicate places. [2021-08-13 02:36:30,016 INFO L482 AbstractCegarLoop]: Abstraction has has 395 places, 236 transitions, 6870 flow [2021-08-13 02:36:30,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,016 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:30,016 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:30,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-08-13 02:36:30,016 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:30,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:30,017 INFO L82 PathProgramCache]: Analyzing trace with hash 304770013, now seen corresponding path program 1 times [2021-08-13 02:36:30,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:30,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684348894] [2021-08-13 02:36:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:30,042 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:30,045 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:30,064 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:30,064 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:30,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-08-13 02:36:30,064 WARN L235 ceAbstractionStarter]: 78 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:30,064 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 79 thread instances. [2021-08-13 02:36:30,146 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:30,147 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:30,148 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:30,148 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:30,148 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:30,148 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:30,148 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:30,148 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:30,148 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:30,148 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:30,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 401 places, 242 transitions, 7041 flow [2021-08-13 02:36:30,303 INFO L129 PetriNetUnfolder]: 0/479 cut-off events. [2021-08-13 02:36:30,303 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:30,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3877 conditions, 479 events. 0/479 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1741 event pairs, 0 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 0. Up to 80 conditions per place. [2021-08-13 02:36:30,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 401 places, 242 transitions, 7041 flow [2021-08-13 02:36:30,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 399 places, 240 transitions, 7037 flow [2021-08-13 02:36:30,308 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:30,308 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:30,308 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:30,309 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:30,309 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:30,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:30,309 INFO L82 PathProgramCache]: Analyzing trace with hash 317059, now seen corresponding path program 1 times [2021-08-13 02:36:30,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:30,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788978873] [2021-08-13 02:36:30,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:30,337 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:30,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:30,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:30,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788978873] [2021-08-13 02:36:30,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788978873] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:30,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:30,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:30,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327247007] [2021-08-13 02:36:30,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:30,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:30,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:30,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:30,342 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 242 [2021-08-13 02:36:30,342 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 240 transitions, 7037 flow. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:30,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 242 [2021-08-13 02:36:30,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:30,469 INFO L129 PetriNetUnfolder]: 0/239 cut-off events. [2021-08-13 02:36:30,469 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:30,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3639 conditions, 239 events. 0/239 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 464 event pairs, 0 based on Foata normal form. 80/319 useless extension candidates. Maximal degree in co-relation 0. Up to 80 conditions per place. [2021-08-13 02:36:30,470 INFO L132 encePairwiseOnDemand]: 240/242 looper letters, 0 selfloop transitions, 1 changer transitions 0/239 dead transitions. [2021-08-13 02:36:30,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 239 transitions, 7037 flow [2021-08-13 02:36:30,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2021-08-13 02:36:30,472 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.990358126721763 [2021-08-13 02:36:30,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2021-08-13 02:36:30,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2021-08-13 02:36:30,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:30,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2021-08-13 02:36:30,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,475 INFO L348 CegarLoopForPetriNet]: 399 programPoint places, 1 predicate places. [2021-08-13 02:36:30,475 INFO L482 AbstractCegarLoop]: Abstraction has has 400 places, 239 transitions, 7037 flow [2021-08-13 02:36:30,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,475 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:30,475 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:30,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-08-13 02:36:30,475 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:30,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:30,476 INFO L82 PathProgramCache]: Analyzing trace with hash 269996173, now seen corresponding path program 1 times [2021-08-13 02:36:30,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:30,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737225711] [2021-08-13 02:36:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:30,505 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:30,508 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:30,529 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:30,529 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:30,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-08-13 02:36:30,530 WARN L235 ceAbstractionStarter]: 79 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:30,530 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 80 thread instances. [2021-08-13 02:36:30,616 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:30,616 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:30,617 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:30,617 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:30,617 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:30,617 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:30,617 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:30,617 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:30,617 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:30,617 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:30,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 406 places, 245 transitions, 7210 flow [2021-08-13 02:36:30,786 INFO L129 PetriNetUnfolder]: 0/485 cut-off events. [2021-08-13 02:36:30,786 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:30,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3966 conditions, 485 events. 0/485 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1768 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 0. Up to 81 conditions per place. [2021-08-13 02:36:30,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 406 places, 245 transitions, 7210 flow [2021-08-13 02:36:30,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 404 places, 243 transitions, 7206 flow [2021-08-13 02:36:30,791 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:30,791 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:30,791 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:30,792 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:30,792 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:30,792 INFO L82 PathProgramCache]: Analyzing trace with hash 324899, now seen corresponding path program 1 times [2021-08-13 02:36:30,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:30,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10758383] [2021-08-13 02:36:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:30,818 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:30,819 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:30,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:30,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10758383] [2021-08-13 02:36:30,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10758383] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:30,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:30,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:30,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572020998] [2021-08-13 02:36:30,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:30,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:30,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:30,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:30,824 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 245 [2021-08-13 02:36:30,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 243 transitions, 7206 flow. Second operand has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:30,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 245 [2021-08-13 02:36:30,825 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:30,963 INFO L129 PetriNetUnfolder]: 0/242 cut-off events. [2021-08-13 02:36:30,963 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:30,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3725 conditions, 242 events. 0/242 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 467 event pairs, 0 based on Foata normal form. 81/323 useless extension candidates. Maximal degree in co-relation 0. Up to 81 conditions per place. [2021-08-13 02:36:30,965 INFO L132 encePairwiseOnDemand]: 243/245 looper letters, 0 selfloop transitions, 1 changer transitions 0/242 dead transitions. [2021-08-13 02:36:30,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 242 transitions, 7206 flow [2021-08-13 02:36:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 728 transitions. [2021-08-13 02:36:30,966 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9904761904761905 [2021-08-13 02:36:30,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 728 transitions. [2021-08-13 02:36:30,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 728 transitions. [2021-08-13 02:36:30,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:30,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 728 transitions. [2021-08-13 02:36:30,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,968 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,968 INFO L348 CegarLoopForPetriNet]: 404 programPoint places, 1 predicate places. [2021-08-13 02:36:30,968 INFO L482 AbstractCegarLoop]: Abstraction has has 405 places, 242 transitions, 7206 flow [2021-08-13 02:36:30,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,969 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:30,969 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:30,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-08-13 02:36:30,969 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:30,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1591291808, now seen corresponding path program 1 times [2021-08-13 02:36:30,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:30,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955553593] [2021-08-13 02:36:30,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:30,996 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:30,999 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:31,018 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:31,019 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:31,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-08-13 02:36:31,019 WARN L235 ceAbstractionStarter]: 80 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:31,019 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 81 thread instances. [2021-08-13 02:36:31,098 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:31,099 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:31,099 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:31,099 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:31,099 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:31,100 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:31,100 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:31,100 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:31,100 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:31,100 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:31,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 411 places, 248 transitions, 7381 flow [2021-08-13 02:36:31,305 INFO L129 PetriNetUnfolder]: 0/491 cut-off events. [2021-08-13 02:36:31,306 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:31,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4056 conditions, 491 events. 0/491 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1826 event pairs, 0 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 0. Up to 82 conditions per place. [2021-08-13 02:36:31,306 INFO L82 GeneralOperation]: Start removeDead. Operand has 411 places, 248 transitions, 7381 flow [2021-08-13 02:36:31,310 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 409 places, 246 transitions, 7377 flow [2021-08-13 02:36:31,310 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:31,310 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:31,310 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:31,310 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:31,310 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:31,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:31,311 INFO L82 PathProgramCache]: Analyzing trace with hash 332835, now seen corresponding path program 1 times [2021-08-13 02:36:31,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:31,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950440862] [2021-08-13 02:36:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:31,332 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:31,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:31,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:31,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950440862] [2021-08-13 02:36:31,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950440862] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:31,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:31,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:31,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961850315] [2021-08-13 02:36:31,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:31,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:31,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:31,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:31,337 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 248 [2021-08-13 02:36:31,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 246 transitions, 7377 flow. Second operand has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:31,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:31,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 248 [2021-08-13 02:36:31,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:31,447 INFO L129 PetriNetUnfolder]: 0/245 cut-off events. [2021-08-13 02:36:31,447 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:31,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3812 conditions, 245 events. 0/245 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 465 event pairs, 0 based on Foata normal form. 82/327 useless extension candidates. Maximal degree in co-relation 0. Up to 82 conditions per place. [2021-08-13 02:36:31,448 INFO L132 encePairwiseOnDemand]: 246/248 looper letters, 0 selfloop transitions, 1 changer transitions 0/245 dead transitions. [2021-08-13 02:36:31,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 245 transitions, 7377 flow [2021-08-13 02:36:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:31,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:31,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 737 transitions. [2021-08-13 02:36:31,449 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9905913978494624 [2021-08-13 02:36:31,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 737 transitions. [2021-08-13 02:36:31,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 737 transitions. [2021-08-13 02:36:31,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:31,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 737 transitions. [2021-08-13 02:36:31,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:31,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:31,451 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:31,451 INFO L348 CegarLoopForPetriNet]: 409 programPoint places, 1 predicate places. [2021-08-13 02:36:31,451 INFO L482 AbstractCegarLoop]: Abstraction has has 410 places, 245 transitions, 7377 flow [2021-08-13 02:36:31,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:31,452 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:31,452 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:31,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-08-13 02:36:31,452 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:31,452 INFO L82 PathProgramCache]: Analyzing trace with hash 804956825, now seen corresponding path program 1 times [2021-08-13 02:36:31,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:31,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82881452] [2021-08-13 02:36:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:31,476 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:31,478 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:31,498 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:31,498 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:31,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-08-13 02:36:31,498 WARN L235 ceAbstractionStarter]: 81 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:31,498 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 82 thread instances. [2021-08-13 02:36:31,578 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:31,579 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:31,579 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:31,579 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:31,579 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:31,579 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:31,579 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:31,579 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:31,579 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:31,580 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:31,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 416 places, 251 transitions, 7554 flow [2021-08-13 02:36:31,733 INFO L129 PetriNetUnfolder]: 0/497 cut-off events. [2021-08-13 02:36:31,733 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:31,733 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4147 conditions, 497 events. 0/497 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1890 event pairs, 0 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2021-08-13 02:36:31,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 416 places, 251 transitions, 7554 flow [2021-08-13 02:36:31,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 414 places, 249 transitions, 7550 flow [2021-08-13 02:36:31,737 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:31,738 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:31,738 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:31,738 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:31,738 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:31,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:31,738 INFO L82 PathProgramCache]: Analyzing trace with hash 340867, now seen corresponding path program 1 times [2021-08-13 02:36:31,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:31,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382581947] [2021-08-13 02:36:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:31,760 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:31,760 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:31,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:31,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382581947] [2021-08-13 02:36:31,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382581947] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:31,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:31,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:31,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274020229] [2021-08-13 02:36:31,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:31,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:31,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:31,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:31,765 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 251 [2021-08-13 02:36:31,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 249 transitions, 7550 flow. Second operand has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:31,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:31,766 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 251 [2021-08-13 02:36:31,766 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:31,870 INFO L129 PetriNetUnfolder]: 0/248 cut-off events. [2021-08-13 02:36:31,870 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:31,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3900 conditions, 248 events. 0/248 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 529 event pairs, 0 based on Foata normal form. 83/331 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2021-08-13 02:36:31,871 INFO L132 encePairwiseOnDemand]: 249/251 looper letters, 0 selfloop transitions, 1 changer transitions 0/248 dead transitions. [2021-08-13 02:36:31,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 248 transitions, 7550 flow [2021-08-13 02:36:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:31,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2021-08-13 02:36:31,872 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9907038512616202 [2021-08-13 02:36:31,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2021-08-13 02:36:31,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2021-08-13 02:36:31,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:31,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2021-08-13 02:36:31,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:31,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:31,874 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:31,874 INFO L348 CegarLoopForPetriNet]: 414 programPoint places, 1 predicate places. [2021-08-13 02:36:31,874 INFO L482 AbstractCegarLoop]: Abstraction has has 415 places, 248 transitions, 7550 flow [2021-08-13 02:36:31,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:31,874 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:31,875 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:31,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-08-13 02:36:31,875 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:31,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:31,875 INFO L82 PathProgramCache]: Analyzing trace with hash 170821411, now seen corresponding path program 1 times [2021-08-13 02:36:31,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:31,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532621379] [2021-08-13 02:36:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:31,898 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:31,901 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:31,921 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:31,921 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:31,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-08-13 02:36:31,922 WARN L235 ceAbstractionStarter]: 82 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:31,922 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 83 thread instances. [2021-08-13 02:36:32,003 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:32,003 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:32,004 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:32,004 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:32,004 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:32,004 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:32,004 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:32,004 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:32,004 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:32,004 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:32,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 421 places, 254 transitions, 7729 flow [2021-08-13 02:36:32,161 INFO L129 PetriNetUnfolder]: 0/503 cut-off events. [2021-08-13 02:36:32,161 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:32,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4239 conditions, 503 events. 0/503 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1819 event pairs, 0 based on Foata normal form. 0/419 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2021-08-13 02:36:32,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 421 places, 254 transitions, 7729 flow [2021-08-13 02:36:32,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 419 places, 252 transitions, 7725 flow [2021-08-13 02:36:32,166 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:32,166 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:32,166 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:32,166 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:32,166 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:32,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:32,166 INFO L82 PathProgramCache]: Analyzing trace with hash 348995, now seen corresponding path program 1 times [2021-08-13 02:36:32,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:32,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444744860] [2021-08-13 02:36:32,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:32,189 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:32,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:32,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:32,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444744860] [2021-08-13 02:36:32,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444744860] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:32,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:32,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:32,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843194918] [2021-08-13 02:36:32,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:32,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:32,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:32,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:32,194 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 254 [2021-08-13 02:36:32,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 252 transitions, 7725 flow. Second operand has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:32,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:32,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 254 [2021-08-13 02:36:32,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:32,319 INFO L129 PetriNetUnfolder]: 0/251 cut-off events. [2021-08-13 02:36:32,319 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:32,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3989 conditions, 251 events. 0/251 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 508 event pairs, 0 based on Foata normal form. 84/335 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2021-08-13 02:36:32,320 INFO L132 encePairwiseOnDemand]: 252/254 looper letters, 0 selfloop transitions, 1 changer transitions 0/251 dead transitions. [2021-08-13 02:36:32,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 251 transitions, 7725 flow [2021-08-13 02:36:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2021-08-13 02:36:32,321 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9908136482939632 [2021-08-13 02:36:32,321 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2021-08-13 02:36:32,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2021-08-13 02:36:32,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:32,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2021-08-13 02:36:32,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:32,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:32,323 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:32,324 INFO L348 CegarLoopForPetriNet]: 419 programPoint places, 1 predicate places. [2021-08-13 02:36:32,324 INFO L482 AbstractCegarLoop]: Abstraction has has 420 places, 251 transitions, 7725 flow [2021-08-13 02:36:32,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:32,324 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:32,324 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:32,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-08-13 02:36:32,324 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:32,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:32,324 INFO L82 PathProgramCache]: Analyzing trace with hash -69961871, now seen corresponding path program 1 times [2021-08-13 02:36:32,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:32,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500321618] [2021-08-13 02:36:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:32,348 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:32,351 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:32,372 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:32,372 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:32,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-08-13 02:36:32,373 WARN L235 ceAbstractionStarter]: 83 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:32,373 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 84 thread instances. [2021-08-13 02:36:32,457 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:32,458 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:32,458 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:32,458 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:32,458 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:32,458 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:32,458 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:32,458 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:32,459 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:32,459 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:32,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 426 places, 257 transitions, 7906 flow [2021-08-13 02:36:32,618 INFO L129 PetriNetUnfolder]: 0/509 cut-off events. [2021-08-13 02:36:32,618 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:32,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4332 conditions, 509 events. 0/509 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1864 event pairs, 0 based on Foata normal form. 0/424 useless extension candidates. Maximal degree in co-relation 0. Up to 85 conditions per place. [2021-08-13 02:36:32,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 426 places, 257 transitions, 7906 flow [2021-08-13 02:36:32,622 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 424 places, 255 transitions, 7902 flow [2021-08-13 02:36:32,623 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:32,623 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:32,623 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:32,623 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:32,623 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:32,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:32,623 INFO L82 PathProgramCache]: Analyzing trace with hash 357219, now seen corresponding path program 1 times [2021-08-13 02:36:32,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:32,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593866067] [2021-08-13 02:36:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:32,646 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:32,646 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:32,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:32,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593866067] [2021-08-13 02:36:32,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593866067] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:32,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:32,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:32,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968373897] [2021-08-13 02:36:32,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:32,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:32,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:32,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:32,650 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 257 [2021-08-13 02:36:32,651 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 255 transitions, 7902 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:32,651 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:32,651 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 257 [2021-08-13 02:36:32,651 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:32,771 INFO L129 PetriNetUnfolder]: 0/254 cut-off events. [2021-08-13 02:36:32,771 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:32,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4079 conditions, 254 events. 0/254 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 446 event pairs, 0 based on Foata normal form. 85/339 useless extension candidates. Maximal degree in co-relation 0. Up to 85 conditions per place. [2021-08-13 02:36:32,773 INFO L132 encePairwiseOnDemand]: 255/257 looper letters, 0 selfloop transitions, 1 changer transitions 0/254 dead transitions. [2021-08-13 02:36:32,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 254 transitions, 7902 flow [2021-08-13 02:36:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:32,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2021-08-13 02:36:32,774 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9909208819714657 [2021-08-13 02:36:32,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2021-08-13 02:36:32,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2021-08-13 02:36:32,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:32,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2021-08-13 02:36:32,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:32,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:32,776 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:32,776 INFO L348 CegarLoopForPetriNet]: 424 programPoint places, 1 predicate places. [2021-08-13 02:36:32,776 INFO L482 AbstractCegarLoop]: Abstraction has has 425 places, 254 transitions, 7902 flow [2021-08-13 02:36:32,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:32,776 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:32,776 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:32,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-08-13 02:36:32,776 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash 909733606, now seen corresponding path program 1 times [2021-08-13 02:36:32,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:32,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992461574] [2021-08-13 02:36:32,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:32,800 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:32,803 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:32,824 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:32,824 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:32,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-08-13 02:36:32,824 WARN L235 ceAbstractionStarter]: 84 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:32,824 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 85 thread instances. [2021-08-13 02:36:32,913 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:32,914 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:32,914 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:32,914 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:32,914 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:32,914 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:32,914 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:32,915 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:32,915 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:32,915 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:32,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 431 places, 260 transitions, 8085 flow [2021-08-13 02:36:33,135 INFO L129 PetriNetUnfolder]: 0/515 cut-off events. [2021-08-13 02:36:33,136 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:33,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4426 conditions, 515 events. 0/515 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1934 event pairs, 0 based on Foata normal form. 0/429 useless extension candidates. Maximal degree in co-relation 0. Up to 86 conditions per place. [2021-08-13 02:36:33,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 431 places, 260 transitions, 8085 flow [2021-08-13 02:36:33,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 429 places, 258 transitions, 8081 flow [2021-08-13 02:36:33,140 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:33,141 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:33,141 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:33,141 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:33,141 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:33,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:33,141 INFO L82 PathProgramCache]: Analyzing trace with hash 365539, now seen corresponding path program 1 times [2021-08-13 02:36:33,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:33,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312629933] [2021-08-13 02:36:33,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:33,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:33,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:33,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:33,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312629933] [2021-08-13 02:36:33,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312629933] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:33,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:33,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:33,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696755346] [2021-08-13 02:36:33,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:33,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:33,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:33,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:33,174 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 260 [2021-08-13 02:36:33,174 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 258 transitions, 8081 flow. Second operand has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:33,174 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:33,174 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 260 [2021-08-13 02:36:33,174 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:33,298 INFO L129 PetriNetUnfolder]: 0/257 cut-off events. [2021-08-13 02:36:33,298 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:33,299 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4170 conditions, 257 events. 0/257 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 519 event pairs, 0 based on Foata normal form. 86/343 useless extension candidates. Maximal degree in co-relation 0. Up to 86 conditions per place. [2021-08-13 02:36:33,299 INFO L132 encePairwiseOnDemand]: 258/260 looper letters, 0 selfloop transitions, 1 changer transitions 0/257 dead transitions. [2021-08-13 02:36:33,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 257 transitions, 8081 flow [2021-08-13 02:36:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2021-08-13 02:36:33,300 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9910256410256411 [2021-08-13 02:36:33,300 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2021-08-13 02:36:33,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2021-08-13 02:36:33,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:33,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2021-08-13 02:36:33,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:33,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:33,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:33,302 INFO L348 CegarLoopForPetriNet]: 429 programPoint places, 1 predicate places. [2021-08-13 02:36:33,302 INFO L482 AbstractCegarLoop]: Abstraction has has 430 places, 257 transitions, 8081 flow [2021-08-13 02:36:33,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:33,302 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:33,302 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:33,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-08-13 02:36:33,302 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:33,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:33,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2041095531, now seen corresponding path program 1 times [2021-08-13 02:36:33,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:33,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179468689] [2021-08-13 02:36:33,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:33,329 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:33,332 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:33,354 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:33,355 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:33,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-08-13 02:36:33,355 WARN L235 ceAbstractionStarter]: 85 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:33,355 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 86 thread instances. [2021-08-13 02:36:33,440 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:33,441 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:33,443 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:33,443 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:33,443 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:33,443 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:33,443 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:33,443 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:33,443 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:33,443 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:33,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 436 places, 263 transitions, 8266 flow [2021-08-13 02:36:33,748 INFO L129 PetriNetUnfolder]: 0/521 cut-off events. [2021-08-13 02:36:33,749 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:33,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 521 events. 0/521 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1961 event pairs, 0 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2021-08-13 02:36:33,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 436 places, 263 transitions, 8266 flow [2021-08-13 02:36:33,753 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 434 places, 261 transitions, 8262 flow [2021-08-13 02:36:33,754 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:33,754 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:33,755 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:33,755 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:33,755 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:33,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:33,755 INFO L82 PathProgramCache]: Analyzing trace with hash 373955, now seen corresponding path program 1 times [2021-08-13 02:36:33,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:33,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264235110] [2021-08-13 02:36:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:33,799 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:33,802 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:33,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:33,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264235110] [2021-08-13 02:36:33,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264235110] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:33,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:33,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:33,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290976843] [2021-08-13 02:36:33,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:33,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:33,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:33,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:33,808 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 263 [2021-08-13 02:36:33,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 261 transitions, 8262 flow. Second operand has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:33,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:33,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 263 [2021-08-13 02:36:33,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:33,936 INFO L129 PetriNetUnfolder]: 0/260 cut-off events. [2021-08-13 02:36:33,936 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:33,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4262 conditions, 260 events. 0/260 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 520 event pairs, 0 based on Foata normal form. 87/347 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2021-08-13 02:36:33,938 INFO L132 encePairwiseOnDemand]: 261/263 looper letters, 0 selfloop transitions, 1 changer transitions 0/260 dead transitions. [2021-08-13 02:36:33,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 260 transitions, 8262 flow [2021-08-13 02:36:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2021-08-13 02:36:33,940 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.991128010139417 [2021-08-13 02:36:33,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2021-08-13 02:36:33,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2021-08-13 02:36:33,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:33,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2021-08-13 02:36:33,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:33,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:33,942 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:33,942 INFO L348 CegarLoopForPetriNet]: 434 programPoint places, 1 predicate places. [2021-08-13 02:36:33,942 INFO L482 AbstractCegarLoop]: Abstraction has has 435 places, 260 transitions, 8262 flow [2021-08-13 02:36:33,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:33,942 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:33,942 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:33,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-08-13 02:36:33,942 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:33,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:33,943 INFO L82 PathProgramCache]: Analyzing trace with hash -542989463, now seen corresponding path program 1 times [2021-08-13 02:36:33,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:33,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034981530] [2021-08-13 02:36:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:33,978 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:33,981 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:34,014 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:34,014 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:34,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-08-13 02:36:34,015 WARN L235 ceAbstractionStarter]: 86 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:34,015 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 87 thread instances. [2021-08-13 02:36:34,099 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:34,100 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:34,100 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:34,100 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:34,100 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:34,100 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:34,100 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:34,101 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:34,101 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:34,101 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:34,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 441 places, 266 transitions, 8449 flow [2021-08-13 02:36:34,273 INFO L129 PetriNetUnfolder]: 0/527 cut-off events. [2021-08-13 02:36:34,273 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:34,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4617 conditions, 527 events. 0/527 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1953 event pairs, 0 based on Foata normal form. 0/439 useless extension candidates. Maximal degree in co-relation 0. Up to 88 conditions per place. [2021-08-13 02:36:34,273 INFO L82 GeneralOperation]: Start removeDead. Operand has 441 places, 266 transitions, 8449 flow [2021-08-13 02:36:34,277 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 439 places, 264 transitions, 8445 flow [2021-08-13 02:36:34,278 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:34,278 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:34,278 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:34,278 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:34,278 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:34,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:34,279 INFO L82 PathProgramCache]: Analyzing trace with hash 382467, now seen corresponding path program 1 times [2021-08-13 02:36:34,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:34,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576603235] [2021-08-13 02:36:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:34,304 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:34,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:34,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:34,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576603235] [2021-08-13 02:36:34,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576603235] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:34,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:34,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:34,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949473510] [2021-08-13 02:36:34,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:34,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:34,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:34,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:34,309 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 266 [2021-08-13 02:36:34,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 264 transitions, 8445 flow. Second operand has 3 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:34,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:34,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 266 [2021-08-13 02:36:34,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:34,433 INFO L129 PetriNetUnfolder]: 0/263 cut-off events. [2021-08-13 02:36:34,433 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:34,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4355 conditions, 263 events. 0/263 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 534 event pairs, 0 based on Foata normal form. 88/351 useless extension candidates. Maximal degree in co-relation 0. Up to 88 conditions per place. [2021-08-13 02:36:34,434 INFO L132 encePairwiseOnDemand]: 264/266 looper letters, 0 selfloop transitions, 1 changer transitions 0/263 dead transitions. [2021-08-13 02:36:34,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 263 transitions, 8445 flow [2021-08-13 02:36:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:34,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:34,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 791 transitions. [2021-08-13 02:36:34,435 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9912280701754386 [2021-08-13 02:36:34,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 791 transitions. [2021-08-13 02:36:34,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 791 transitions. [2021-08-13 02:36:34,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:34,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 791 transitions. [2021-08-13 02:36:34,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:34,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:34,437 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:34,437 INFO L348 CegarLoopForPetriNet]: 439 programPoint places, 1 predicate places. [2021-08-13 02:36:34,438 INFO L482 AbstractCegarLoop]: Abstraction has has 440 places, 263 transitions, 8445 flow [2021-08-13 02:36:34,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:34,438 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:34,438 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:34,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-08-13 02:36:34,438 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:34,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2057549701, now seen corresponding path program 1 times [2021-08-13 02:36:34,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:34,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126931131] [2021-08-13 02:36:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:34,465 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:34,468 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:34,490 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:34,490 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:34,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-08-13 02:36:34,491 WARN L235 ceAbstractionStarter]: 87 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:34,491 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 88 thread instances. [2021-08-13 02:36:34,581 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:34,582 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:34,583 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:34,583 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:34,583 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:34,583 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:34,583 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:34,583 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:34,583 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:34,583 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:34,586 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 446 places, 269 transitions, 8634 flow [2021-08-13 02:36:34,719 INFO L129 PetriNetUnfolder]: 0/533 cut-off events. [2021-08-13 02:36:34,719 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:34,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4714 conditions, 533 events. 0/533 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2009 event pairs, 0 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 0. Up to 89 conditions per place. [2021-08-13 02:36:34,719 INFO L82 GeneralOperation]: Start removeDead. Operand has 446 places, 269 transitions, 8634 flow [2021-08-13 02:36:34,722 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 444 places, 267 transitions, 8630 flow [2021-08-13 02:36:34,723 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:34,723 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:34,723 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:34,723 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:34,723 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:34,723 INFO L82 PathProgramCache]: Analyzing trace with hash 391075, now seen corresponding path program 1 times [2021-08-13 02:36:34,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:34,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131174932] [2021-08-13 02:36:34,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:34,745 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:34,746 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:34,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:34,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131174932] [2021-08-13 02:36:34,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131174932] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:34,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:34,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:34,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071514207] [2021-08-13 02:36:34,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:34,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:34,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:34,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:34,750 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 269 [2021-08-13 02:36:34,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 267 transitions, 8630 flow. Second operand has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:34,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:34,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 269 [2021-08-13 02:36:34,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:34,857 INFO L129 PetriNetUnfolder]: 0/266 cut-off events. [2021-08-13 02:36:34,857 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:34,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4449 conditions, 266 events. 0/266 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 551 event pairs, 0 based on Foata normal form. 89/355 useless extension candidates. Maximal degree in co-relation 0. Up to 89 conditions per place. [2021-08-13 02:36:34,858 INFO L132 encePairwiseOnDemand]: 267/269 looper letters, 0 selfloop transitions, 1 changer transitions 0/266 dead transitions. [2021-08-13 02:36:34,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 266 transitions, 8630 flow [2021-08-13 02:36:34,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:34,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:34,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2021-08-13 02:36:34,859 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9913258983890955 [2021-08-13 02:36:34,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2021-08-13 02:36:34,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2021-08-13 02:36:34,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:34,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2021-08-13 02:36:34,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:34,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:34,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:34,861 INFO L348 CegarLoopForPetriNet]: 444 programPoint places, 1 predicate places. [2021-08-13 02:36:34,861 INFO L482 AbstractCegarLoop]: Abstraction has has 445 places, 266 transitions, 8630 flow [2021-08-13 02:36:34,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:34,861 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:34,861 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:34,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-08-13 02:36:34,861 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:34,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:34,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2031919404, now seen corresponding path program 1 times [2021-08-13 02:36:34,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:34,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441257673] [2021-08-13 02:36:34,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:34,886 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:34,889 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:34,913 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:34,913 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:34,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-08-13 02:36:34,914 WARN L235 ceAbstractionStarter]: 88 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:34,914 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 89 thread instances. [2021-08-13 02:36:34,997 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:34,997 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:34,998 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:34,998 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:34,998 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:34,998 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:34,998 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:34,998 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:34,998 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:34,998 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:35,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 451 places, 272 transitions, 8821 flow [2021-08-13 02:36:35,187 INFO L129 PetriNetUnfolder]: 0/539 cut-off events. [2021-08-13 02:36:35,187 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:35,187 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4812 conditions, 539 events. 0/539 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2051 event pairs, 0 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2021-08-13 02:36:35,187 INFO L82 GeneralOperation]: Start removeDead. Operand has 451 places, 272 transitions, 8821 flow [2021-08-13 02:36:35,192 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 449 places, 270 transitions, 8817 flow [2021-08-13 02:36:35,192 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:35,192 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:35,192 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:35,192 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:35,192 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:35,193 INFO L82 PathProgramCache]: Analyzing trace with hash 399779, now seen corresponding path program 1 times [2021-08-13 02:36:35,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:35,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989193740] [2021-08-13 02:36:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:35,221 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:35,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:35,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:35,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989193740] [2021-08-13 02:36:35,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989193740] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:35,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:35,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:35,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018828891] [2021-08-13 02:36:35,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:35,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:35,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:35,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:35,225 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 272 [2021-08-13 02:36:35,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 270 transitions, 8817 flow. Second operand has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:35,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:35,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 272 [2021-08-13 02:36:35,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:35,446 INFO L129 PetriNetUnfolder]: 0/269 cut-off events. [2021-08-13 02:36:35,446 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:35,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4544 conditions, 269 events. 0/269 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 529 event pairs, 0 based on Foata normal form. 90/359 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2021-08-13 02:36:35,447 INFO L132 encePairwiseOnDemand]: 270/272 looper letters, 0 selfloop transitions, 1 changer transitions 0/269 dead transitions. [2021-08-13 02:36:35,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 269 transitions, 8817 flow [2021-08-13 02:36:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 809 transitions. [2021-08-13 02:36:35,449 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.991421568627451 [2021-08-13 02:36:35,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 809 transitions. [2021-08-13 02:36:35,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 809 transitions. [2021-08-13 02:36:35,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:35,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 809 transitions. [2021-08-13 02:36:35,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:35,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:35,451 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:35,451 INFO L348 CegarLoopForPetriNet]: 449 programPoint places, 1 predicate places. [2021-08-13 02:36:35,451 INFO L482 AbstractCegarLoop]: Abstraction has has 450 places, 269 transitions, 8817 flow [2021-08-13 02:36:35,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:35,452 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:35,452 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:35,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-08-13 02:36:35,452 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:35,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:35,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1915211327, now seen corresponding path program 1 times [2021-08-13 02:36:35,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:35,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474850672] [2021-08-13 02:36:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:35,479 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:35,483 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:35,504 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:35,504 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:35,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-08-13 02:36:35,505 WARN L235 ceAbstractionStarter]: 89 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:35,505 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 90 thread instances. [2021-08-13 02:36:35,605 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:35,606 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:35,607 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:35,607 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:35,607 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:35,607 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:35,607 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:35,607 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:35,607 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:35,607 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:35,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 456 places, 275 transitions, 9010 flow [2021-08-13 02:36:35,776 INFO L129 PetriNetUnfolder]: 0/545 cut-off events. [2021-08-13 02:36:35,776 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:35,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4911 conditions, 545 events. 0/545 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2082 event pairs, 0 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2021-08-13 02:36:35,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 456 places, 275 transitions, 9010 flow [2021-08-13 02:36:35,780 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 454 places, 273 transitions, 9006 flow [2021-08-13 02:36:35,781 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:35,781 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:35,781 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:35,781 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:35,781 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:35,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:35,781 INFO L82 PathProgramCache]: Analyzing trace with hash 408579, now seen corresponding path program 1 times [2021-08-13 02:36:35,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:35,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586448897] [2021-08-13 02:36:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:35,804 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:35,804 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:35,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:35,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586448897] [2021-08-13 02:36:35,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586448897] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:35,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:35,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:35,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591863240] [2021-08-13 02:36:35,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:35,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:35,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:35,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:35,808 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 275 [2021-08-13 02:36:35,809 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 273 transitions, 9006 flow. Second operand has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:35,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:35,809 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 275 [2021-08-13 02:36:35,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:35,950 INFO L129 PetriNetUnfolder]: 0/272 cut-off events. [2021-08-13 02:36:35,950 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:35,950 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4640 conditions, 272 events. 0/272 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 497 event pairs, 0 based on Foata normal form. 91/363 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2021-08-13 02:36:35,951 INFO L132 encePairwiseOnDemand]: 273/275 looper letters, 0 selfloop transitions, 1 changer transitions 0/272 dead transitions. [2021-08-13 02:36:35,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 272 transitions, 9006 flow [2021-08-13 02:36:35,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 818 transitions. [2021-08-13 02:36:35,952 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9915151515151515 [2021-08-13 02:36:35,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 818 transitions. [2021-08-13 02:36:35,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 818 transitions. [2021-08-13 02:36:35,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:35,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 818 transitions. [2021-08-13 02:36:35,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:35,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:35,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:35,955 INFO L348 CegarLoopForPetriNet]: 454 programPoint places, 1 predicate places. [2021-08-13 02:36:35,955 INFO L482 AbstractCegarLoop]: Abstraction has has 455 places, 272 transitions, 9006 flow [2021-08-13 02:36:35,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:35,955 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:35,955 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:35,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-08-13 02:36:35,955 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:35,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:35,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1288938671, now seen corresponding path program 1 times [2021-08-13 02:36:35,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:35,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567522120] [2021-08-13 02:36:35,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:35,986 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:35,989 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:36,012 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:36,013 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:36,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-08-13 02:36:36,013 WARN L235 ceAbstractionStarter]: 90 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:36,013 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 91 thread instances. [2021-08-13 02:36:36,118 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:36,119 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:36,119 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:36,119 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:36,119 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:36,120 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:36,120 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:36,120 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:36,120 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:36,120 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:36,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 461 places, 278 transitions, 9201 flow [2021-08-13 02:36:36,291 INFO L129 PetriNetUnfolder]: 0/551 cut-off events. [2021-08-13 02:36:36,292 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:36,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5011 conditions, 551 events. 0/551 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1983 event pairs, 0 based on Foata normal form. 0/459 useless extension candidates. Maximal degree in co-relation 0. Up to 92 conditions per place. [2021-08-13 02:36:36,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 461 places, 278 transitions, 9201 flow [2021-08-13 02:36:36,296 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 459 places, 276 transitions, 9197 flow [2021-08-13 02:36:36,296 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:36,296 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:36,296 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:36,297 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:36,297 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:36,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:36,297 INFO L82 PathProgramCache]: Analyzing trace with hash 417475, now seen corresponding path program 1 times [2021-08-13 02:36:36,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:36,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506640682] [2021-08-13 02:36:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:36,317 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:36,317 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:36,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:36,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506640682] [2021-08-13 02:36:36,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506640682] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:36,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:36,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:36,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990108785] [2021-08-13 02:36:36,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:36,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:36,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:36,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:36,322 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 278 [2021-08-13 02:36:36,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 276 transitions, 9197 flow. Second operand has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:36,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:36,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 278 [2021-08-13 02:36:36,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:36,429 INFO L129 PetriNetUnfolder]: 0/275 cut-off events. [2021-08-13 02:36:36,429 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:36,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4737 conditions, 275 events. 0/275 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 558 event pairs, 0 based on Foata normal form. 92/367 useless extension candidates. Maximal degree in co-relation 0. Up to 92 conditions per place. [2021-08-13 02:36:36,430 INFO L132 encePairwiseOnDemand]: 276/278 looper letters, 0 selfloop transitions, 1 changer transitions 0/275 dead transitions. [2021-08-13 02:36:36,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 275 transitions, 9197 flow [2021-08-13 02:36:36,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:36,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 827 transitions. [2021-08-13 02:36:36,431 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9916067146282974 [2021-08-13 02:36:36,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 827 transitions. [2021-08-13 02:36:36,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 827 transitions. [2021-08-13 02:36:36,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:36,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 827 transitions. [2021-08-13 02:36:36,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:36,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:36,433 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:36,433 INFO L348 CegarLoopForPetriNet]: 459 programPoint places, 1 predicate places. [2021-08-13 02:36:36,433 INFO L482 AbstractCegarLoop]: Abstraction has has 460 places, 275 transitions, 9197 flow [2021-08-13 02:36:36,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:36,433 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:36,433 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:36,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-08-13 02:36:36,433 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:36,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:36,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1788980425, now seen corresponding path program 1 times [2021-08-13 02:36:36,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:36,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895214478] [2021-08-13 02:36:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:36,454 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:36,457 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:36,479 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:36,479 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:36,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-08-13 02:36:36,479 WARN L235 ceAbstractionStarter]: 91 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:36,479 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 92 thread instances. [2021-08-13 02:36:36,566 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:36,566 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:36,567 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:36,567 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:36,567 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:36,567 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:36,567 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:36,567 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:36,567 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:36,567 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:36,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 466 places, 281 transitions, 9394 flow [2021-08-13 02:36:36,720 INFO L129 PetriNetUnfolder]: 0/557 cut-off events. [2021-08-13 02:36:36,720 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:36,720 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5112 conditions, 557 events. 0/557 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2112 event pairs, 0 based on Foata normal form. 0/464 useless extension candidates. Maximal degree in co-relation 0. Up to 93 conditions per place. [2021-08-13 02:36:36,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 466 places, 281 transitions, 9394 flow [2021-08-13 02:36:36,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 464 places, 279 transitions, 9390 flow [2021-08-13 02:36:36,725 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:36,725 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:36,725 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:36,725 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:36,725 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:36,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:36,725 INFO L82 PathProgramCache]: Analyzing trace with hash 426467, now seen corresponding path program 1 times [2021-08-13 02:36:36,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:36,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951068690] [2021-08-13 02:36:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:36,746 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:36,746 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:36,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:36,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951068690] [2021-08-13 02:36:36,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951068690] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:36,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:36,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:36,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539843861] [2021-08-13 02:36:36,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:36,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:36,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:36,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:36,750 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 281 [2021-08-13 02:36:36,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 279 transitions, 9390 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:36,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:36,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 281 [2021-08-13 02:36:36,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:36,870 INFO L129 PetriNetUnfolder]: 0/278 cut-off events. [2021-08-13 02:36:36,870 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:36,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4835 conditions, 278 events. 0/278 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 632 event pairs, 0 based on Foata normal form. 93/371 useless extension candidates. Maximal degree in co-relation 0. Up to 93 conditions per place. [2021-08-13 02:36:36,871 INFO L132 encePairwiseOnDemand]: 279/281 looper letters, 0 selfloop transitions, 1 changer transitions 0/278 dead transitions. [2021-08-13 02:36:36,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 278 transitions, 9390 flow [2021-08-13 02:36:36,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:36,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:36,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2021-08-13 02:36:36,872 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9916963226571768 [2021-08-13 02:36:36,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2021-08-13 02:36:36,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2021-08-13 02:36:36,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:36,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2021-08-13 02:36:36,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:36,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:36,873 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:36,873 INFO L348 CegarLoopForPetriNet]: 464 programPoint places, 1 predicate places. [2021-08-13 02:36:36,873 INFO L482 AbstractCegarLoop]: Abstraction has has 465 places, 278 transitions, 9390 flow [2021-08-13 02:36:36,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:36,874 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:36,874 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:36,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2021-08-13 02:36:36,874 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:36,874 INFO L82 PathProgramCache]: Analyzing trace with hash 601729650, now seen corresponding path program 1 times [2021-08-13 02:36:36,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:36,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610374302] [2021-08-13 02:36:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:36,895 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:36,898 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:36,919 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:36,920 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:36,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-08-13 02:36:36,920 WARN L235 ceAbstractionStarter]: 92 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:36,920 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 93 thread instances. [2021-08-13 02:36:37,006 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:37,007 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:37,007 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:37,007 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:37,007 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:37,007 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:37,008 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:37,008 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:37,008 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:37,008 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:37,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 471 places, 284 transitions, 9589 flow [2021-08-13 02:36:37,209 INFO L129 PetriNetUnfolder]: 0/563 cut-off events. [2021-08-13 02:36:37,209 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:37,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5214 conditions, 563 events. 0/563 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2095 event pairs, 0 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 0. Up to 94 conditions per place. [2021-08-13 02:36:37,210 INFO L82 GeneralOperation]: Start removeDead. Operand has 471 places, 284 transitions, 9589 flow [2021-08-13 02:36:37,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 469 places, 282 transitions, 9585 flow [2021-08-13 02:36:37,215 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:37,215 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:37,215 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:37,215 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:37,215 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:37,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:37,215 INFO L82 PathProgramCache]: Analyzing trace with hash 435555, now seen corresponding path program 1 times [2021-08-13 02:36:37,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:37,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250668166] [2021-08-13 02:36:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:37,349 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:37,349 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:37,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:37,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250668166] [2021-08-13 02:36:37,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250668166] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:37,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:37,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:37,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941708639] [2021-08-13 02:36:37,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:37,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:37,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:37,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:37,357 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 284 [2021-08-13 02:36:37,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 282 transitions, 9585 flow. Second operand has 3 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:37,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:37,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 284 [2021-08-13 02:36:37,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:37,509 INFO L129 PetriNetUnfolder]: 0/281 cut-off events. [2021-08-13 02:36:37,509 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:37,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4934 conditions, 281 events. 0/281 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 592 event pairs, 0 based on Foata normal form. 94/375 useless extension candidates. Maximal degree in co-relation 0. Up to 94 conditions per place. [2021-08-13 02:36:37,510 INFO L132 encePairwiseOnDemand]: 282/284 looper letters, 0 selfloop transitions, 1 changer transitions 0/281 dead transitions. [2021-08-13 02:36:37,510 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 281 transitions, 9585 flow [2021-08-13 02:36:37,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 845 transitions. [2021-08-13 02:36:37,511 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9917840375586855 [2021-08-13 02:36:37,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 845 transitions. [2021-08-13 02:36:37,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 845 transitions. [2021-08-13 02:36:37,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:37,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 845 transitions. [2021-08-13 02:36:37,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:37,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:37,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:37,513 INFO L348 CegarLoopForPetriNet]: 469 programPoint places, 1 predicate places. [2021-08-13 02:36:37,513 INFO L482 AbstractCegarLoop]: Abstraction has has 470 places, 281 transitions, 9585 flow [2021-08-13 02:36:37,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:37,514 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:37,514 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:37,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-08-13 02:36:37,514 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:37,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:37,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1765061603, now seen corresponding path program 1 times [2021-08-13 02:36:37,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:37,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698554189] [2021-08-13 02:36:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:37,540 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:37,543 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:37,564 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:37,564 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:37,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-08-13 02:36:37,565 WARN L235 ceAbstractionStarter]: 93 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:37,565 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 94 thread instances. [2021-08-13 02:36:37,653 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:37,654 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:37,654 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:37,654 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:37,654 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:37,654 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:37,654 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:37,654 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:37,654 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:37,654 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:37,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 476 places, 287 transitions, 9786 flow [2021-08-13 02:36:37,846 INFO L129 PetriNetUnfolder]: 0/569 cut-off events. [2021-08-13 02:36:37,846 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:37,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5317 conditions, 569 events. 0/569 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2121 event pairs, 0 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2021-08-13 02:36:37,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 476 places, 287 transitions, 9786 flow [2021-08-13 02:36:37,852 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 474 places, 285 transitions, 9782 flow [2021-08-13 02:36:37,853 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:37,853 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:37,853 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:37,853 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:37,853 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:37,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:37,853 INFO L82 PathProgramCache]: Analyzing trace with hash 444739, now seen corresponding path program 1 times [2021-08-13 02:36:37,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:37,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991491704] [2021-08-13 02:36:37,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:37,878 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:37,878 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:37,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:37,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991491704] [2021-08-13 02:36:37,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991491704] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:37,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:37,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:37,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366437615] [2021-08-13 02:36:37,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:37,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:37,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:37,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:37,882 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 287 [2021-08-13 02:36:37,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 285 transitions, 9782 flow. Second operand has 3 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:37,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:37,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 287 [2021-08-13 02:36:37,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:38,023 INFO L129 PetriNetUnfolder]: 0/284 cut-off events. [2021-08-13 02:36:38,023 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:38,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5034 conditions, 284 events. 0/284 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 576 event pairs, 0 based on Foata normal form. 95/379 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2021-08-13 02:36:38,024 INFO L132 encePairwiseOnDemand]: 285/287 looper letters, 0 selfloop transitions, 1 changer transitions 0/284 dead transitions. [2021-08-13 02:36:38,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 284 transitions, 9782 flow [2021-08-13 02:36:38,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 854 transitions. [2021-08-13 02:36:38,025 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.991869918699187 [2021-08-13 02:36:38,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 854 transitions. [2021-08-13 02:36:38,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 854 transitions. [2021-08-13 02:36:38,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:38,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 854 transitions. [2021-08-13 02:36:38,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:38,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:38,027 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:38,027 INFO L348 CegarLoopForPetriNet]: 474 programPoint places, 1 predicate places. [2021-08-13 02:36:38,027 INFO L482 AbstractCegarLoop]: Abstraction has has 475 places, 284 transitions, 9782 flow [2021-08-13 02:36:38,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:38,027 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:38,027 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:38,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-08-13 02:36:38,028 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:38,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:38,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1280676107, now seen corresponding path program 1 times [2021-08-13 02:36:38,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:38,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542569228] [2021-08-13 02:36:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:38,052 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:38,055 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:38,078 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:38,078 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:38,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-08-13 02:36:38,078 WARN L235 ceAbstractionStarter]: 94 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:38,078 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 95 thread instances. [2021-08-13 02:36:38,169 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:38,169 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:38,170 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:38,170 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:38,170 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:38,170 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:38,170 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:38,170 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:38,170 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:38,170 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:38,174 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 481 places, 290 transitions, 9985 flow [2021-08-13 02:36:38,339 INFO L129 PetriNetUnfolder]: 0/575 cut-off events. [2021-08-13 02:36:38,339 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:38,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5421 conditions, 575 events. 0/575 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2086 event pairs, 0 based on Foata normal form. 0/479 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2021-08-13 02:36:38,339 INFO L82 GeneralOperation]: Start removeDead. Operand has 481 places, 290 transitions, 9985 flow [2021-08-13 02:36:38,342 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 479 places, 288 transitions, 9981 flow [2021-08-13 02:36:38,343 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:38,343 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:38,343 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:38,343 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:38,343 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:38,343 INFO L82 PathProgramCache]: Analyzing trace with hash 454019, now seen corresponding path program 1 times [2021-08-13 02:36:38,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:38,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010663954] [2021-08-13 02:36:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:38,366 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:38,366 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:38,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:38,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010663954] [2021-08-13 02:36:38,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010663954] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:38,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:38,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:38,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108717450] [2021-08-13 02:36:38,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:38,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:38,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:38,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:38,370 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 290 [2021-08-13 02:36:38,370 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 288 transitions, 9981 flow. Second operand has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:38,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:38,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 290 [2021-08-13 02:36:38,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:38,486 INFO L129 PetriNetUnfolder]: 0/287 cut-off events. [2021-08-13 02:36:38,486 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:38,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5135 conditions, 287 events. 0/287 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 550 event pairs, 0 based on Foata normal form. 96/383 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2021-08-13 02:36:38,487 INFO L132 encePairwiseOnDemand]: 288/290 looper letters, 0 selfloop transitions, 1 changer transitions 0/287 dead transitions. [2021-08-13 02:36:38,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 287 transitions, 9981 flow [2021-08-13 02:36:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 863 transitions. [2021-08-13 02:36:38,487 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9919540229885058 [2021-08-13 02:36:38,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 863 transitions. [2021-08-13 02:36:38,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 863 transitions. [2021-08-13 02:36:38,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:38,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 863 transitions. [2021-08-13 02:36:38,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:38,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:38,490 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:38,490 INFO L348 CegarLoopForPetriNet]: 479 programPoint places, 1 predicate places. [2021-08-13 02:36:38,490 INFO L482 AbstractCegarLoop]: Abstraction has has 480 places, 287 transitions, 9981 flow [2021-08-13 02:36:38,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:38,490 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:38,490 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:38,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-08-13 02:36:38,490 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:38,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:38,491 INFO L82 PathProgramCache]: Analyzing trace with hash -758222019, now seen corresponding path program 1 times [2021-08-13 02:36:38,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:38,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905948209] [2021-08-13 02:36:38,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:38,518 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:38,521 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:38,547 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:38,547 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:38,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-08-13 02:36:38,547 WARN L235 ceAbstractionStarter]: 95 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:38,547 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 96 thread instances. [2021-08-13 02:36:38,643 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:38,644 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:38,644 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:38,644 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:38,644 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:38,644 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:38,644 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:38,644 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:38,645 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:38,645 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:38,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 486 places, 293 transitions, 10186 flow [2021-08-13 02:36:38,796 INFO L129 PetriNetUnfolder]: 0/581 cut-off events. [2021-08-13 02:36:38,797 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:38,797 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5526 conditions, 581 events. 0/581 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2153 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 0. Up to 97 conditions per place. [2021-08-13 02:36:38,797 INFO L82 GeneralOperation]: Start removeDead. Operand has 486 places, 293 transitions, 10186 flow [2021-08-13 02:36:38,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 484 places, 291 transitions, 10182 flow [2021-08-13 02:36:38,802 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:38,802 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:38,802 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:38,802 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:38,802 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:38,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:38,803 INFO L82 PathProgramCache]: Analyzing trace with hash 463395, now seen corresponding path program 1 times [2021-08-13 02:36:38,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:38,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505082289] [2021-08-13 02:36:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:38,833 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:38,833 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:38,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:38,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505082289] [2021-08-13 02:36:38,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505082289] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:38,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:38,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:38,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410302143] [2021-08-13 02:36:38,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:38,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:38,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:38,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:38,837 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 293 [2021-08-13 02:36:38,837 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 291 transitions, 10182 flow. Second operand has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:38,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:38,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 293 [2021-08-13 02:36:38,837 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:38,954 INFO L129 PetriNetUnfolder]: 0/290 cut-off events. [2021-08-13 02:36:38,954 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:38,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5237 conditions, 290 events. 0/290 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 598 event pairs, 0 based on Foata normal form. 97/387 useless extension candidates. Maximal degree in co-relation 0. Up to 97 conditions per place. [2021-08-13 02:36:38,955 INFO L132 encePairwiseOnDemand]: 291/293 looper letters, 0 selfloop transitions, 1 changer transitions 0/290 dead transitions. [2021-08-13 02:36:38,955 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 290 transitions, 10182 flow [2021-08-13 02:36:38,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:38,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2021-08-13 02:36:38,956 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9920364050056882 [2021-08-13 02:36:38,956 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2021-08-13 02:36:38,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2021-08-13 02:36:38,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:38,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2021-08-13 02:36:38,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:38,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:38,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:38,958 INFO L348 CegarLoopForPetriNet]: 484 programPoint places, 1 predicate places. [2021-08-13 02:36:38,958 INFO L482 AbstractCegarLoop]: Abstraction has has 485 places, 290 transitions, 10182 flow [2021-08-13 02:36:38,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:38,958 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:38,958 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:38,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-08-13 02:36:38,958 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:38,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:38,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1366519480, now seen corresponding path program 1 times [2021-08-13 02:36:38,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:38,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805155853] [2021-08-13 02:36:38,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:38,984 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:38,988 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:39,011 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:39,011 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:39,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2021-08-13 02:36:39,011 WARN L235 ceAbstractionStarter]: 96 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:39,011 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 97 thread instances. [2021-08-13 02:36:39,098 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:39,099 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:39,099 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:39,100 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:39,100 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:39,100 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:39,100 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:39,100 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:39,100 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:39,100 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:39,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 491 places, 296 transitions, 10389 flow [2021-08-13 02:36:39,320 INFO L129 PetriNetUnfolder]: 0/587 cut-off events. [2021-08-13 02:36:39,320 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:39,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5632 conditions, 587 events. 0/587 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2145 event pairs, 0 based on Foata normal form. 0/489 useless extension candidates. Maximal degree in co-relation 0. Up to 98 conditions per place. [2021-08-13 02:36:39,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 491 places, 296 transitions, 10389 flow [2021-08-13 02:36:39,324 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 489 places, 294 transitions, 10385 flow [2021-08-13 02:36:39,325 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:39,325 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:39,325 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:39,325 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:39,325 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:39,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:39,325 INFO L82 PathProgramCache]: Analyzing trace with hash 472867, now seen corresponding path program 1 times [2021-08-13 02:36:39,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:39,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935943819] [2021-08-13 02:36:39,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:39,397 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:39,397 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:39,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:39,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935943819] [2021-08-13 02:36:39,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935943819] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:39,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:39,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:39,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778264834] [2021-08-13 02:36:39,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:39,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:39,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:39,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:39,400 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 296 [2021-08-13 02:36:39,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 294 transitions, 10385 flow. Second operand has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:39,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:39,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 296 [2021-08-13 02:36:39,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:39,526 INFO L129 PetriNetUnfolder]: 0/293 cut-off events. [2021-08-13 02:36:39,526 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:39,527 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5340 conditions, 293 events. 0/293 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 610 event pairs, 0 based on Foata normal form. 98/391 useless extension candidates. Maximal degree in co-relation 0. Up to 98 conditions per place. [2021-08-13 02:36:39,527 INFO L132 encePairwiseOnDemand]: 294/296 looper letters, 0 selfloop transitions, 1 changer transitions 0/293 dead transitions. [2021-08-13 02:36:39,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 293 transitions, 10385 flow [2021-08-13 02:36:39,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:39,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:39,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 881 transitions. [2021-08-13 02:36:39,528 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9921171171171171 [2021-08-13 02:36:39,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 881 transitions. [2021-08-13 02:36:39,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 881 transitions. [2021-08-13 02:36:39,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:39,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 881 transitions. [2021-08-13 02:36:39,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:39,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:39,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:39,529 INFO L348 CegarLoopForPetriNet]: 489 programPoint places, 1 predicate places. [2021-08-13 02:36:39,529 INFO L482 AbstractCegarLoop]: Abstraction has has 490 places, 293 transitions, 10385 flow [2021-08-13 02:36:39,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:39,530 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:39,530 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:39,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2021-08-13 02:36:39,530 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:39,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:39,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1935852969, now seen corresponding path program 1 times [2021-08-13 02:36:39,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:39,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571713804] [2021-08-13 02:36:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:39,556 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:39,559 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:39,582 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:39,583 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:39,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2021-08-13 02:36:39,583 WARN L235 ceAbstractionStarter]: 97 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:39,583 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 98 thread instances. [2021-08-13 02:36:39,662 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:39,662 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:39,662 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:39,662 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:39,663 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:39,663 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:39,663 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:39,663 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:39,663 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:39,663 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:39,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 496 places, 299 transitions, 10594 flow [2021-08-13 02:36:39,828 INFO L129 PetriNetUnfolder]: 0/593 cut-off events. [2021-08-13 02:36:39,828 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:39,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5739 conditions, 593 events. 0/593 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2193 event pairs, 0 based on Foata normal form. 0/494 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2021-08-13 02:36:39,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 496 places, 299 transitions, 10594 flow [2021-08-13 02:36:39,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 494 places, 297 transitions, 10590 flow [2021-08-13 02:36:39,834 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:39,834 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:39,834 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:39,834 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:39,834 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:39,834 INFO L82 PathProgramCache]: Analyzing trace with hash 482435, now seen corresponding path program 1 times [2021-08-13 02:36:39,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:39,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358007638] [2021-08-13 02:36:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:39,859 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:39,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:39,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:39,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358007638] [2021-08-13 02:36:39,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358007638] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:39,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:39,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:39,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073562967] [2021-08-13 02:36:39,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:39,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:39,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:39,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:39,862 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 299 [2021-08-13 02:36:39,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 297 transitions, 10590 flow. Second operand has 3 states, 3 states have (on average 296.6666666666667) internal successors, (890), 3 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:39,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:39,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 299 [2021-08-13 02:36:39,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:39,988 INFO L129 PetriNetUnfolder]: 0/296 cut-off events. [2021-08-13 02:36:39,988 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:39,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5444 conditions, 296 events. 0/296 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 614 event pairs, 0 based on Foata normal form. 99/395 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2021-08-13 02:36:39,989 INFO L132 encePairwiseOnDemand]: 297/299 looper letters, 0 selfloop transitions, 1 changer transitions 0/296 dead transitions. [2021-08-13 02:36:39,989 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 296 transitions, 10590 flow [2021-08-13 02:36:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 890 transitions. [2021-08-13 02:36:39,990 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.992196209587514 [2021-08-13 02:36:39,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 890 transitions. [2021-08-13 02:36:39,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 890 transitions. [2021-08-13 02:36:39,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:39,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 890 transitions. [2021-08-13 02:36:39,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.6666666666667) internal successors, (890), 3 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:39,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:39,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:39,991 INFO L348 CegarLoopForPetriNet]: 494 programPoint places, 1 predicate places. [2021-08-13 02:36:39,991 INFO L482 AbstractCegarLoop]: Abstraction has has 495 places, 296 transitions, 10590 flow [2021-08-13 02:36:39,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 296.6666666666667) internal successors, (890), 3 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:39,992 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:39,992 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:39,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2021-08-13 02:36:39,992 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:39,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:39,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1806427707, now seen corresponding path program 1 times [2021-08-13 02:36:39,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:39,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644615450] [2021-08-13 02:36:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:40,018 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:40,021 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:40,046 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:40,046 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:40,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2021-08-13 02:36:40,046 WARN L235 ceAbstractionStarter]: 98 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:40,046 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 99 thread instances. [2021-08-13 02:36:40,125 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:40,126 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:40,126 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:40,126 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:40,126 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:40,126 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:40,126 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:40,127 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:40,127 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:40,127 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:40,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 501 places, 302 transitions, 10801 flow [2021-08-13 02:36:40,318 INFO L129 PetriNetUnfolder]: 0/599 cut-off events. [2021-08-13 02:36:40,318 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:40,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5847 conditions, 599 events. 0/599 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2209 event pairs, 0 based on Foata normal form. 0/499 useless extension candidates. Maximal degree in co-relation 0. Up to 100 conditions per place. [2021-08-13 02:36:40,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 501 places, 302 transitions, 10801 flow [2021-08-13 02:36:40,322 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 499 places, 300 transitions, 10797 flow [2021-08-13 02:36:40,323 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:40,323 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:40,323 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:40,323 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:40,323 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:40,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:40,323 INFO L82 PathProgramCache]: Analyzing trace with hash 492099, now seen corresponding path program 1 times [2021-08-13 02:36:40,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:40,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366162894] [2021-08-13 02:36:40,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:40,348 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:40,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:40,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:40,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366162894] [2021-08-13 02:36:40,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366162894] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:40,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:40,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:40,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947881151] [2021-08-13 02:36:40,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:40,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:40,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:40,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:40,351 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 302 [2021-08-13 02:36:40,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 300 transitions, 10797 flow. Second operand has 3 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:40,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:40,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 302 [2021-08-13 02:36:40,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:40,481 INFO L129 PetriNetUnfolder]: 0/299 cut-off events. [2021-08-13 02:36:40,481 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:40,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5549 conditions, 299 events. 0/299 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 575 event pairs, 0 based on Foata normal form. 100/399 useless extension candidates. Maximal degree in co-relation 0. Up to 100 conditions per place. [2021-08-13 02:36:40,482 INFO L132 encePairwiseOnDemand]: 300/302 looper letters, 0 selfloop transitions, 1 changer transitions 0/299 dead transitions. [2021-08-13 02:36:40,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 299 transitions, 10797 flow [2021-08-13 02:36:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:40,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 899 transitions. [2021-08-13 02:36:40,483 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9922737306843267 [2021-08-13 02:36:40,483 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 899 transitions. [2021-08-13 02:36:40,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 899 transitions. [2021-08-13 02:36:40,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:40,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 899 transitions. [2021-08-13 02:36:40,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:40,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:40,485 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:40,485 INFO L348 CegarLoopForPetriNet]: 499 programPoint places, 1 predicate places. [2021-08-13 02:36:40,485 INFO L482 AbstractCegarLoop]: Abstraction has has 500 places, 299 transitions, 10797 flow [2021-08-13 02:36:40,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:40,485 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:40,485 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:40,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2021-08-13 02:36:40,485 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash 890119905, now seen corresponding path program 1 times [2021-08-13 02:36:40,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:40,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138867167] [2021-08-13 02:36:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:40,511 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:40,514 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:40,538 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:40,539 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:40,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2021-08-13 02:36:40,539 WARN L235 ceAbstractionStarter]: 99 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:40,539 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 100 thread instances. [2021-08-13 02:36:40,621 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:40,621 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:40,622 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:40,622 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:40,622 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:40,622 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:40,622 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:40,622 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:40,622 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:40,622 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:40,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 506 places, 305 transitions, 11010 flow [2021-08-13 02:36:40,791 INFO L129 PetriNetUnfolder]: 0/605 cut-off events. [2021-08-13 02:36:40,792 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:40,792 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5956 conditions, 605 events. 0/605 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2221 event pairs, 0 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 0. Up to 101 conditions per place. [2021-08-13 02:36:40,792 INFO L82 GeneralOperation]: Start removeDead. Operand has 506 places, 305 transitions, 11010 flow [2021-08-13 02:36:40,796 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 504 places, 303 transitions, 11006 flow [2021-08-13 02:36:40,797 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:40,797 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:40,797 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:40,797 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:40,797 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:40,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:40,797 INFO L82 PathProgramCache]: Analyzing trace with hash 501859, now seen corresponding path program 1 times [2021-08-13 02:36:40,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:40,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752541016] [2021-08-13 02:36:40,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:40,822 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:40,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:40,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:40,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752541016] [2021-08-13 02:36:40,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752541016] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:40,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:40,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:40,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433455285] [2021-08-13 02:36:40,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:40,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:40,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:40,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:40,826 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 305 [2021-08-13 02:36:40,827 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 303 transitions, 11006 flow. Second operand has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:40,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:40,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 305 [2021-08-13 02:36:40,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:40,961 INFO L129 PetriNetUnfolder]: 0/302 cut-off events. [2021-08-13 02:36:40,961 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:40,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5655 conditions, 302 events. 0/302 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 623 event pairs, 0 based on Foata normal form. 101/403 useless extension candidates. Maximal degree in co-relation 0. Up to 101 conditions per place. [2021-08-13 02:36:40,962 INFO L132 encePairwiseOnDemand]: 303/305 looper letters, 0 selfloop transitions, 1 changer transitions 0/302 dead transitions. [2021-08-13 02:36:40,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 302 transitions, 11006 flow [2021-08-13 02:36:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2021-08-13 02:36:40,963 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9923497267759562 [2021-08-13 02:36:40,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2021-08-13 02:36:40,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2021-08-13 02:36:40,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:40,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2021-08-13 02:36:40,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:40,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:40,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:40,965 INFO L348 CegarLoopForPetriNet]: 504 programPoint places, 1 predicate places. [2021-08-13 02:36:40,965 INFO L482 AbstractCegarLoop]: Abstraction has has 505 places, 302 transitions, 11006 flow [2021-08-13 02:36:40,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:40,965 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:40,966 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:40,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2021-08-13 02:36:40,966 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:40,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:40,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1232130558, now seen corresponding path program 1 times [2021-08-13 02:36:40,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:40,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340820890] [2021-08-13 02:36:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:40,992 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:40,996 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:41,020 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:41,021 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:41,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2021-08-13 02:36:41,021 WARN L235 ceAbstractionStarter]: 100 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:41,021 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 101 thread instances. [2021-08-13 02:36:41,114 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:41,114 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:41,115 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:41,115 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:41,115 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:41,115 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:41,115 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:41,115 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:41,115 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:41,115 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:41,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 511 places, 308 transitions, 11221 flow [2021-08-13 02:36:41,418 INFO L129 PetriNetUnfolder]: 0/611 cut-off events. [2021-08-13 02:36:41,418 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:41,419 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6066 conditions, 611 events. 0/611 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2255 event pairs, 0 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 0. Up to 102 conditions per place. [2021-08-13 02:36:41,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 511 places, 308 transitions, 11221 flow [2021-08-13 02:36:41,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 509 places, 306 transitions, 11217 flow [2021-08-13 02:36:41,425 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:41,425 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:41,425 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:41,425 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:41,425 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:41,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:41,426 INFO L82 PathProgramCache]: Analyzing trace with hash 511715, now seen corresponding path program 1 times [2021-08-13 02:36:41,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:41,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759739932] [2021-08-13 02:36:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:41,455 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:41,455 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:41,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:41,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759739932] [2021-08-13 02:36:41,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759739932] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:41,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:41,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:41,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477834586] [2021-08-13 02:36:41,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:41,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:41,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:41,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:41,458 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 308 [2021-08-13 02:36:41,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 306 transitions, 11217 flow. Second operand has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:41,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:41,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 308 [2021-08-13 02:36:41,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:41,592 INFO L129 PetriNetUnfolder]: 0/305 cut-off events. [2021-08-13 02:36:41,592 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:41,592 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5762 conditions, 305 events. 0/305 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 578 event pairs, 0 based on Foata normal form. 102/407 useless extension candidates. Maximal degree in co-relation 0. Up to 102 conditions per place. [2021-08-13 02:36:41,593 INFO L132 encePairwiseOnDemand]: 306/308 looper letters, 0 selfloop transitions, 1 changer transitions 0/305 dead transitions. [2021-08-13 02:36:41,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 305 transitions, 11217 flow [2021-08-13 02:36:41,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 917 transitions. [2021-08-13 02:36:41,594 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9924242424242424 [2021-08-13 02:36:41,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 917 transitions. [2021-08-13 02:36:41,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 917 transitions. [2021-08-13 02:36:41,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:41,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 917 transitions. [2021-08-13 02:36:41,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:41,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:41,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:41,596 INFO L348 CegarLoopForPetriNet]: 509 programPoint places, 1 predicate places. [2021-08-13 02:36:41,596 INFO L482 AbstractCegarLoop]: Abstraction has has 510 places, 305 transitions, 11217 flow [2021-08-13 02:36:41,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:41,596 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:41,596 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:41,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2021-08-13 02:36:41,596 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:41,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:41,597 INFO L82 PathProgramCache]: Analyzing trace with hash 162839141, now seen corresponding path program 1 times [2021-08-13 02:36:41,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:41,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51466133] [2021-08-13 02:36:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:41,623 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:41,627 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:41,650 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:41,650 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:41,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2021-08-13 02:36:41,651 WARN L235 ceAbstractionStarter]: 101 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:41,651 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 102 thread instances. [2021-08-13 02:36:41,740 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:41,740 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:41,741 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:41,741 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:41,741 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:41,741 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:41,741 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:41,741 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:41,741 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:41,741 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:41,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 516 places, 311 transitions, 11434 flow [2021-08-13 02:36:41,938 INFO L129 PetriNetUnfolder]: 0/617 cut-off events. [2021-08-13 02:36:41,938 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:41,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6177 conditions, 617 events. 0/617 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2276 event pairs, 0 based on Foata normal form. 0/514 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2021-08-13 02:36:41,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 516 places, 311 transitions, 11434 flow [2021-08-13 02:36:41,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 514 places, 309 transitions, 11430 flow [2021-08-13 02:36:41,943 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:41,943 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:41,943 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:41,943 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:41,943 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:41,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:41,943 INFO L82 PathProgramCache]: Analyzing trace with hash 521667, now seen corresponding path program 1 times [2021-08-13 02:36:41,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:41,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955584821] [2021-08-13 02:36:41,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:41,969 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:41,970 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:41,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:41,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955584821] [2021-08-13 02:36:41,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955584821] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:41,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:41,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:41,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321841163] [2021-08-13 02:36:41,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:41,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:41,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:41,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:41,973 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 311 [2021-08-13 02:36:41,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 309 transitions, 11430 flow. Second operand has 3 states, 3 states have (on average 308.6666666666667) internal successors, (926), 3 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:41,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:41,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 311 [2021-08-13 02:36:41,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:42,113 INFO L129 PetriNetUnfolder]: 0/308 cut-off events. [2021-08-13 02:36:42,114 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:42,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5870 conditions, 308 events. 0/308 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 604 event pairs, 0 based on Foata normal form. 103/411 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2021-08-13 02:36:42,115 INFO L132 encePairwiseOnDemand]: 309/311 looper letters, 0 selfloop transitions, 1 changer transitions 0/308 dead transitions. [2021-08-13 02:36:42,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 308 transitions, 11430 flow [2021-08-13 02:36:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:42,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 926 transitions. [2021-08-13 02:36:42,115 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.992497320471597 [2021-08-13 02:36:42,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 926 transitions. [2021-08-13 02:36:42,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 926 transitions. [2021-08-13 02:36:42,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:42,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 926 transitions. [2021-08-13 02:36:42,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.6666666666667) internal successors, (926), 3 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:42,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:42,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:42,117 INFO L348 CegarLoopForPetriNet]: 514 programPoint places, 1 predicate places. [2021-08-13 02:36:42,117 INFO L482 AbstractCegarLoop]: Abstraction has has 515 places, 308 transitions, 11430 flow [2021-08-13 02:36:42,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 308.6666666666667) internal successors, (926), 3 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:42,117 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:42,118 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:42,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2021-08-13 02:36:42,118 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:42,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:42,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1879511423, now seen corresponding path program 1 times [2021-08-13 02:36:42,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:42,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604292419] [2021-08-13 02:36:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:42,146 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:42,149 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:42,175 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:42,175 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:42,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2021-08-13 02:36:42,176 WARN L235 ceAbstractionStarter]: 102 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:42,176 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 103 thread instances. [2021-08-13 02:36:42,260 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:42,260 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:42,261 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:42,261 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:42,261 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:42,261 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:42,261 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:42,261 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:42,261 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:42,261 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:42,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 521 places, 314 transitions, 11649 flow [2021-08-13 02:36:42,448 INFO L129 PetriNetUnfolder]: 0/623 cut-off events. [2021-08-13 02:36:42,449 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:42,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6289 conditions, 623 events. 0/623 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2335 event pairs, 0 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 0. Up to 104 conditions per place. [2021-08-13 02:36:42,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 521 places, 314 transitions, 11649 flow [2021-08-13 02:36:42,453 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 519 places, 312 transitions, 11645 flow [2021-08-13 02:36:42,453 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:42,453 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:42,453 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:42,453 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:42,453 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:42,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:42,454 INFO L82 PathProgramCache]: Analyzing trace with hash 531715, now seen corresponding path program 1 times [2021-08-13 02:36:42,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:42,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565136918] [2021-08-13 02:36:42,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:42,481 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:42,481 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:42,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:42,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565136918] [2021-08-13 02:36:42,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565136918] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:42,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:42,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:42,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003224226] [2021-08-13 02:36:42,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:42,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:42,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:42,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:42,485 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 314 [2021-08-13 02:36:42,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 312 transitions, 11645 flow. Second operand has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:42,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:42,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 314 [2021-08-13 02:36:42,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:42,631 INFO L129 PetriNetUnfolder]: 0/311 cut-off events. [2021-08-13 02:36:42,631 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:42,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5979 conditions, 311 events. 0/311 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 621 event pairs, 0 based on Foata normal form. 104/415 useless extension candidates. Maximal degree in co-relation 0. Up to 104 conditions per place. [2021-08-13 02:36:42,632 INFO L132 encePairwiseOnDemand]: 312/314 looper letters, 0 selfloop transitions, 1 changer transitions 0/311 dead transitions. [2021-08-13 02:36:42,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 311 transitions, 11645 flow [2021-08-13 02:36:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 935 transitions. [2021-08-13 02:36:42,633 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9925690021231423 [2021-08-13 02:36:42,633 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 935 transitions. [2021-08-13 02:36:42,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 935 transitions. [2021-08-13 02:36:42,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:42,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 935 transitions. [2021-08-13 02:36:42,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:42,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:42,634 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:42,634 INFO L348 CegarLoopForPetriNet]: 519 programPoint places, 1 predicate places. [2021-08-13 02:36:42,634 INFO L482 AbstractCegarLoop]: Abstraction has has 520 places, 311 transitions, 11645 flow [2021-08-13 02:36:42,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:42,635 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:42,635 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:42,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2021-08-13 02:36:42,635 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:42,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:42,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1613292469, now seen corresponding path program 1 times [2021-08-13 02:36:42,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:42,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286334063] [2021-08-13 02:36:42,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:42,664 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:42,667 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:42,693 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:42,693 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:42,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-08-13 02:36:42,694 WARN L235 ceAbstractionStarter]: 103 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:42,694 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 104 thread instances. [2021-08-13 02:36:42,783 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:42,784 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:42,784 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:42,784 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:42,784 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:42,784 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:42,784 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:42,784 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:42,784 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:42,784 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:42,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 526 places, 317 transitions, 11866 flow [2021-08-13 02:36:43,077 INFO L129 PetriNetUnfolder]: 0/629 cut-off events. [2021-08-13 02:36:43,078 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:43,078 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6402 conditions, 629 events. 0/629 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2308 event pairs, 0 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 0. Up to 105 conditions per place. [2021-08-13 02:36:43,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 526 places, 317 transitions, 11866 flow [2021-08-13 02:36:43,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 524 places, 315 transitions, 11862 flow [2021-08-13 02:36:43,082 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:43,082 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:43,082 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:43,083 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:43,083 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:43,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:43,083 INFO L82 PathProgramCache]: Analyzing trace with hash 541859, now seen corresponding path program 1 times [2021-08-13 02:36:43,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:43,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143859631] [2021-08-13 02:36:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:43,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:43,119 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:43,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:43,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143859631] [2021-08-13 02:36:43,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143859631] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:43,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:43,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:43,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594577182] [2021-08-13 02:36:43,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:43,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:43,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:43,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:43,123 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 317 [2021-08-13 02:36:43,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 315 transitions, 11862 flow. Second operand has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:43,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:43,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 317 [2021-08-13 02:36:43,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:43,266 INFO L129 PetriNetUnfolder]: 0/314 cut-off events. [2021-08-13 02:36:43,266 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:43,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6089 conditions, 314 events. 0/314 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 566 event pairs, 0 based on Foata normal form. 105/419 useless extension candidates. Maximal degree in co-relation 0. Up to 105 conditions per place. [2021-08-13 02:36:43,267 INFO L132 encePairwiseOnDemand]: 315/317 looper letters, 0 selfloop transitions, 1 changer transitions 0/314 dead transitions. [2021-08-13 02:36:43,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 314 transitions, 11862 flow [2021-08-13 02:36:43,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:43,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:43,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 944 transitions. [2021-08-13 02:36:43,268 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9926393270241851 [2021-08-13 02:36:43,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 944 transitions. [2021-08-13 02:36:43,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 944 transitions. [2021-08-13 02:36:43,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:43,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 944 transitions. [2021-08-13 02:36:43,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:43,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:43,269 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:43,269 INFO L348 CegarLoopForPetriNet]: 524 programPoint places, 1 predicate places. [2021-08-13 02:36:43,269 INFO L482 AbstractCegarLoop]: Abstraction has has 525 places, 314 transitions, 11862 flow [2021-08-13 02:36:43,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:43,269 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:43,269 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:43,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2021-08-13 02:36:43,269 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:43,269 INFO L82 PathProgramCache]: Analyzing trace with hash 235190340, now seen corresponding path program 1 times [2021-08-13 02:36:43,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:43,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475503714] [2021-08-13 02:36:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:43,303 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:43,306 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:43,327 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:43,328 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:43,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2021-08-13 02:36:43,328 WARN L235 ceAbstractionStarter]: 104 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:43,328 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 105 thread instances. [2021-08-13 02:36:43,412 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:43,412 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:43,413 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:43,413 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:43,413 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:43,413 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:43,413 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:43,413 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:43,413 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:43,413 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:43,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 531 places, 320 transitions, 12085 flow [2021-08-13 02:36:43,604 INFO L129 PetriNetUnfolder]: 0/635 cut-off events. [2021-08-13 02:36:43,605 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:43,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6516 conditions, 635 events. 0/635 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2362 event pairs, 0 based on Foata normal form. 0/529 useless extension candidates. Maximal degree in co-relation 0. Up to 106 conditions per place. [2021-08-13 02:36:43,605 INFO L82 GeneralOperation]: Start removeDead. Operand has 531 places, 320 transitions, 12085 flow [2021-08-13 02:36:43,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 529 places, 318 transitions, 12081 flow [2021-08-13 02:36:43,610 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:43,610 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:43,610 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:43,610 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:43,610 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:43,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:43,610 INFO L82 PathProgramCache]: Analyzing trace with hash 552099, now seen corresponding path program 1 times [2021-08-13 02:36:43,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:43,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348769684] [2021-08-13 02:36:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:43,645 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:43,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:43,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:43,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348769684] [2021-08-13 02:36:43,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348769684] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:43,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:43,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:43,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618052316] [2021-08-13 02:36:43,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:43,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:43,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:43,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:43,649 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 320 [2021-08-13 02:36:43,649 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 318 transitions, 12081 flow. Second operand has 3 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:43,649 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:43,649 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 320 [2021-08-13 02:36:43,649 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:43,800 INFO L129 PetriNetUnfolder]: 0/317 cut-off events. [2021-08-13 02:36:43,800 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:43,800 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6200 conditions, 317 events. 0/317 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 626 event pairs, 0 based on Foata normal form. 106/423 useless extension candidates. Maximal degree in co-relation 0. Up to 106 conditions per place. [2021-08-13 02:36:43,801 INFO L132 encePairwiseOnDemand]: 318/320 looper letters, 0 selfloop transitions, 1 changer transitions 0/317 dead transitions. [2021-08-13 02:36:43,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 317 transitions, 12081 flow [2021-08-13 02:36:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 953 transitions. [2021-08-13 02:36:43,802 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9927083333333333 [2021-08-13 02:36:43,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 953 transitions. [2021-08-13 02:36:43,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 953 transitions. [2021-08-13 02:36:43,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:43,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 953 transitions. [2021-08-13 02:36:43,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:43,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:43,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:43,803 INFO L348 CegarLoopForPetriNet]: 529 programPoint places, 1 predicate places. [2021-08-13 02:36:43,804 INFO L482 AbstractCegarLoop]: Abstraction has has 530 places, 317 transitions, 12081 flow [2021-08-13 02:36:43,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:43,804 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:43,804 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:43,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2021-08-13 02:36:43,804 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:43,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1706772049, now seen corresponding path program 1 times [2021-08-13 02:36:43,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:43,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764241863] [2021-08-13 02:36:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:43,839 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:43,842 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:43,864 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:43,865 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:43,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2021-08-13 02:36:43,865 WARN L235 ceAbstractionStarter]: 105 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:43,865 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 106 thread instances. [2021-08-13 02:36:43,948 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:43,949 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:43,949 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:43,949 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:43,949 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:43,949 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:43,949 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:43,949 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:43,949 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:43,949 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:43,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 536 places, 323 transitions, 12306 flow [2021-08-13 02:36:44,145 INFO L129 PetriNetUnfolder]: 0/641 cut-off events. [2021-08-13 02:36:44,146 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:44,146 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6631 conditions, 641 events. 0/641 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2438 event pairs, 0 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2021-08-13 02:36:44,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 536 places, 323 transitions, 12306 flow [2021-08-13 02:36:44,150 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 534 places, 321 transitions, 12302 flow [2021-08-13 02:36:44,150 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:44,150 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:44,151 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:44,151 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:44,151 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:44,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:44,151 INFO L82 PathProgramCache]: Analyzing trace with hash 562435, now seen corresponding path program 1 times [2021-08-13 02:36:44,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:44,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016199156] [2021-08-13 02:36:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:44,184 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:44,185 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:44,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:44,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016199156] [2021-08-13 02:36:44,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016199156] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:44,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:44,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:44,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825886377] [2021-08-13 02:36:44,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:44,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:44,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:44,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:44,188 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 323 [2021-08-13 02:36:44,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 321 transitions, 12302 flow. Second operand has 3 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:44,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:44,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 323 [2021-08-13 02:36:44,189 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:44,340 INFO L129 PetriNetUnfolder]: 0/320 cut-off events. [2021-08-13 02:36:44,340 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:44,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6312 conditions, 320 events. 0/320 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 658 event pairs, 0 based on Foata normal form. 107/427 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2021-08-13 02:36:44,341 INFO L132 encePairwiseOnDemand]: 321/323 looper letters, 0 selfloop transitions, 1 changer transitions 0/320 dead transitions. [2021-08-13 02:36:44,341 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 320 transitions, 12302 flow [2021-08-13 02:36:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:44,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 962 transitions. [2021-08-13 02:36:44,342 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9927760577915377 [2021-08-13 02:36:44,342 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 962 transitions. [2021-08-13 02:36:44,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 962 transitions. [2021-08-13 02:36:44,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:44,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 962 transitions. [2021-08-13 02:36:44,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:44,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:44,343 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:44,343 INFO L348 CegarLoopForPetriNet]: 534 programPoint places, 1 predicate places. [2021-08-13 02:36:44,343 INFO L482 AbstractCegarLoop]: Abstraction has has 535 places, 320 transitions, 12302 flow [2021-08-13 02:36:44,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:44,344 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:44,344 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:44,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2021-08-13 02:36:44,344 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:44,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:44,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1296985031, now seen corresponding path program 1 times [2021-08-13 02:36:44,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:44,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924333530] [2021-08-13 02:36:44,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:44,380 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:44,383 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:44,410 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:44,410 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:44,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2021-08-13 02:36:44,411 WARN L235 ceAbstractionStarter]: 106 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:44,411 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 107 thread instances. [2021-08-13 02:36:44,495 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:44,496 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:44,496 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:44,496 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:44,496 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:44,496 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:44,496 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:44,496 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:44,496 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:44,496 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:44,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 541 places, 326 transitions, 12529 flow [2021-08-13 02:36:44,818 INFO L129 PetriNetUnfolder]: 0/647 cut-off events. [2021-08-13 02:36:44,818 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:44,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6747 conditions, 647 events. 0/647 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2388 event pairs, 0 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 0. Up to 108 conditions per place. [2021-08-13 02:36:44,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 541 places, 326 transitions, 12529 flow [2021-08-13 02:36:44,824 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 539 places, 324 transitions, 12525 flow [2021-08-13 02:36:44,826 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:44,826 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:44,826 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:44,826 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:44,826 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:44,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:44,826 INFO L82 PathProgramCache]: Analyzing trace with hash 572867, now seen corresponding path program 1 times [2021-08-13 02:36:44,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:44,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703606107] [2021-08-13 02:36:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:44,873 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:44,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:44,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:44,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703606107] [2021-08-13 02:36:44,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703606107] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:44,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:44,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:44,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779097566] [2021-08-13 02:36:44,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:44,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:44,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:44,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:44,878 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 326 [2021-08-13 02:36:44,878 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 324 transitions, 12525 flow. Second operand has 3 states, 3 states have (on average 323.6666666666667) internal successors, (971), 3 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:44,878 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:44,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 326 [2021-08-13 02:36:44,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:45,105 INFO L129 PetriNetUnfolder]: 0/323 cut-off events. [2021-08-13 02:36:45,106 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:45,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6425 conditions, 323 events. 0/323 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 647 event pairs, 0 based on Foata normal form. 108/431 useless extension candidates. Maximal degree in co-relation 0. Up to 108 conditions per place. [2021-08-13 02:36:45,107 INFO L132 encePairwiseOnDemand]: 324/326 looper letters, 0 selfloop transitions, 1 changer transitions 0/323 dead transitions. [2021-08-13 02:36:45,107 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 323 transitions, 12525 flow [2021-08-13 02:36:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 971 transitions. [2021-08-13 02:36:45,108 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9928425357873211 [2021-08-13 02:36:45,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 971 transitions. [2021-08-13 02:36:45,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 971 transitions. [2021-08-13 02:36:45,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:45,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 971 transitions. [2021-08-13 02:36:45,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.6666666666667) internal successors, (971), 3 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:45,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:45,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:45,109 INFO L348 CegarLoopForPetriNet]: 539 programPoint places, 1 predicate places. [2021-08-13 02:36:45,109 INFO L482 AbstractCegarLoop]: Abstraction has has 540 places, 323 transitions, 12525 flow [2021-08-13 02:36:45,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 323.6666666666667) internal successors, (971), 3 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:45,110 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:45,110 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:45,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2021-08-13 02:36:45,110 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:45,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1043675719, now seen corresponding path program 1 times [2021-08-13 02:36:45,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:45,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54255109] [2021-08-13 02:36:45,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:45,147 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:45,150 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:45,179 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:45,179 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:45,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2021-08-13 02:36:45,179 WARN L235 ceAbstractionStarter]: 107 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:45,179 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 108 thread instances. [2021-08-13 02:36:45,287 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:45,288 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:45,288 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:45,288 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:45,289 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:45,289 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:45,289 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:45,289 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:45,289 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:45,289 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:45,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 546 places, 329 transitions, 12754 flow [2021-08-13 02:36:45,525 INFO L129 PetriNetUnfolder]: 0/653 cut-off events. [2021-08-13 02:36:45,525 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:45,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6864 conditions, 653 events. 0/653 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2397 event pairs, 0 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 0. Up to 109 conditions per place. [2021-08-13 02:36:45,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 546 places, 329 transitions, 12754 flow [2021-08-13 02:36:45,529 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 544 places, 327 transitions, 12750 flow [2021-08-13 02:36:45,530 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:45,530 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:45,530 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:45,530 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:45,530 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:45,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:45,531 INFO L82 PathProgramCache]: Analyzing trace with hash 583395, now seen corresponding path program 1 times [2021-08-13 02:36:45,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:45,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635801524] [2021-08-13 02:36:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:45,562 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:45,562 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:45,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:45,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635801524] [2021-08-13 02:36:45,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635801524] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:45,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:45,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:45,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398814025] [2021-08-13 02:36:45,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:45,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:45,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:45,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:45,565 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 329 [2021-08-13 02:36:45,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 327 transitions, 12750 flow. Second operand has 3 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:45,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:45,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 329 [2021-08-13 02:36:45,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:45,727 INFO L129 PetriNetUnfolder]: 0/326 cut-off events. [2021-08-13 02:36:45,727 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:45,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6539 conditions, 326 events. 0/326 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 630 event pairs, 0 based on Foata normal form. 109/435 useless extension candidates. Maximal degree in co-relation 0. Up to 109 conditions per place. [2021-08-13 02:36:45,728 INFO L132 encePairwiseOnDemand]: 327/329 looper letters, 0 selfloop transitions, 1 changer transitions 0/326 dead transitions. [2021-08-13 02:36:45,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 326 transitions, 12750 flow [2021-08-13 02:36:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:45,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2021-08-13 02:36:45,729 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9929078014184397 [2021-08-13 02:36:45,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2021-08-13 02:36:45,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2021-08-13 02:36:45,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:45,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2021-08-13 02:36:45,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:45,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:45,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:45,730 INFO L348 CegarLoopForPetriNet]: 544 programPoint places, 1 predicate places. [2021-08-13 02:36:45,731 INFO L482 AbstractCegarLoop]: Abstraction has has 545 places, 326 transitions, 12750 flow [2021-08-13 02:36:45,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:45,731 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:45,731 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:45,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2021-08-13 02:36:45,731 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:45,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:45,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1777993098, now seen corresponding path program 1 times [2021-08-13 02:36:45,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:45,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864684893] [2021-08-13 02:36:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:45,763 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:45,765 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:45,789 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:45,789 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:45,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2021-08-13 02:36:45,789 WARN L235 ceAbstractionStarter]: 108 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:45,789 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 109 thread instances. [2021-08-13 02:36:45,875 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:45,875 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:45,876 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:45,876 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:45,876 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:45,876 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:45,876 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:45,876 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:45,876 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:45,876 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:45,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 551 places, 332 transitions, 12981 flow [2021-08-13 02:36:46,089 INFO L129 PetriNetUnfolder]: 0/659 cut-off events. [2021-08-13 02:36:46,089 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:46,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6982 conditions, 659 events. 0/659 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2469 event pairs, 0 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 0. Up to 110 conditions per place. [2021-08-13 02:36:46,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 551 places, 332 transitions, 12981 flow [2021-08-13 02:36:46,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 549 places, 330 transitions, 12977 flow [2021-08-13 02:36:46,094 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:46,094 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:46,094 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:46,094 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:46,094 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:46,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:46,094 INFO L82 PathProgramCache]: Analyzing trace with hash 594019, now seen corresponding path program 1 times [2021-08-13 02:36:46,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:46,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415670681] [2021-08-13 02:36:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:46,126 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:46,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:46,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:46,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415670681] [2021-08-13 02:36:46,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415670681] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:46,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:46,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:46,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686462999] [2021-08-13 02:36:46,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:46,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:46,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:46,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:46,130 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 332 [2021-08-13 02:36:46,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 330 transitions, 12977 flow. Second operand has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:46,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:46,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 332 [2021-08-13 02:36:46,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:46,307 INFO L129 PetriNetUnfolder]: 0/329 cut-off events. [2021-08-13 02:36:46,307 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:46,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6654 conditions, 329 events. 0/329 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 625 event pairs, 0 based on Foata normal form. 110/439 useless extension candidates. Maximal degree in co-relation 0. Up to 110 conditions per place. [2021-08-13 02:36:46,308 INFO L132 encePairwiseOnDemand]: 330/332 looper letters, 0 selfloop transitions, 1 changer transitions 0/329 dead transitions. [2021-08-13 02:36:46,308 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 329 transitions, 12977 flow [2021-08-13 02:36:46,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 989 transitions. [2021-08-13 02:36:46,309 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9929718875502008 [2021-08-13 02:36:46,309 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 989 transitions. [2021-08-13 02:36:46,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 989 transitions. [2021-08-13 02:36:46,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:46,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 989 transitions. [2021-08-13 02:36:46,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:46,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:46,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:46,311 INFO L348 CegarLoopForPetriNet]: 549 programPoint places, 1 predicate places. [2021-08-13 02:36:46,311 INFO L482 AbstractCegarLoop]: Abstraction has has 550 places, 329 transitions, 12977 flow [2021-08-13 02:36:46,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:46,311 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:46,311 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:46,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2021-08-13 02:36:46,311 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:46,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:46,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1263830381, now seen corresponding path program 1 times [2021-08-13 02:36:46,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:46,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243597897] [2021-08-13 02:36:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:46,343 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:46,347 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:46,375 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:46,376 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:46,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2021-08-13 02:36:46,376 WARN L235 ceAbstractionStarter]: 109 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:46,376 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 110 thread instances. [2021-08-13 02:36:46,475 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:46,476 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:46,476 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:46,476 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:46,476 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:46,476 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:46,476 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:46,476 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:46,476 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:46,476 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:46,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 556 places, 335 transitions, 13210 flow [2021-08-13 02:36:46,706 INFO L129 PetriNetUnfolder]: 0/665 cut-off events. [2021-08-13 02:36:46,706 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:46,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7101 conditions, 665 events. 0/665 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2425 event pairs, 0 based on Foata normal form. 0/554 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2021-08-13 02:36:46,706 INFO L82 GeneralOperation]: Start removeDead. Operand has 556 places, 335 transitions, 13210 flow [2021-08-13 02:36:46,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 554 places, 333 transitions, 13206 flow [2021-08-13 02:36:46,712 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:46,712 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:46,712 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:46,712 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:46,712 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:46,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:46,713 INFO L82 PathProgramCache]: Analyzing trace with hash 604739, now seen corresponding path program 1 times [2021-08-13 02:36:46,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:46,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088023705] [2021-08-13 02:36:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:46,749 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:46,749 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:46,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:46,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088023705] [2021-08-13 02:36:46,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088023705] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:46,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:46,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:46,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208623937] [2021-08-13 02:36:46,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:46,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:46,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:46,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:46,753 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 335 [2021-08-13 02:36:46,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 333 transitions, 13206 flow. Second operand has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:46,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:46,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 335 [2021-08-13 02:36:46,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:46,982 INFO L129 PetriNetUnfolder]: 0/332 cut-off events. [2021-08-13 02:36:46,982 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:46,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6770 conditions, 332 events. 0/332 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 574 event pairs, 0 based on Foata normal form. 111/443 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2021-08-13 02:36:46,983 INFO L132 encePairwiseOnDemand]: 333/335 looper letters, 0 selfloop transitions, 1 changer transitions 0/332 dead transitions. [2021-08-13 02:36:46,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 332 transitions, 13206 flow [2021-08-13 02:36:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:46,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:46,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 998 transitions. [2021-08-13 02:36:46,983 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9930348258706467 [2021-08-13 02:36:46,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 998 transitions. [2021-08-13 02:36:46,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 998 transitions. [2021-08-13 02:36:46,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:46,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 998 transitions. [2021-08-13 02:36:46,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:46,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:46,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:46,985 INFO L348 CegarLoopForPetriNet]: 554 programPoint places, 1 predicate places. [2021-08-13 02:36:46,985 INFO L482 AbstractCegarLoop]: Abstraction has has 555 places, 332 transitions, 13206 flow [2021-08-13 02:36:46,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:46,986 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:46,986 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:46,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2021-08-13 02:36:46,986 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:46,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:46,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1341832691, now seen corresponding path program 1 times [2021-08-13 02:36:46,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:46,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354068419] [2021-08-13 02:36:46,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:47,031 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:47,034 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:47,061 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:47,061 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:47,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2021-08-13 02:36:47,061 WARN L235 ceAbstractionStarter]: 110 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:47,061 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 111 thread instances. [2021-08-13 02:36:47,164 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:47,165 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:47,165 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:47,166 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:47,166 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:47,166 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:47,166 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:47,166 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:47,166 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:47,166 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:47,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 561 places, 338 transitions, 13441 flow [2021-08-13 02:36:47,489 INFO L129 PetriNetUnfolder]: 0/671 cut-off events. [2021-08-13 02:36:47,489 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:47,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7221 conditions, 671 events. 0/671 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2471 event pairs, 0 based on Foata normal form. 0/559 useless extension candidates. Maximal degree in co-relation 0. Up to 112 conditions per place. [2021-08-13 02:36:47,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 561 places, 338 transitions, 13441 flow [2021-08-13 02:36:47,496 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 559 places, 336 transitions, 13437 flow [2021-08-13 02:36:47,497 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:47,497 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:47,497 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:47,497 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:47,497 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:47,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:47,497 INFO L82 PathProgramCache]: Analyzing trace with hash 615555, now seen corresponding path program 1 times [2021-08-13 02:36:47,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:47,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199551489] [2021-08-13 02:36:47,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:47,550 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:47,550 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:47,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:47,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199551489] [2021-08-13 02:36:47,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199551489] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:47,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:47,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:47,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976726178] [2021-08-13 02:36:47,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:47,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:47,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:47,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:47,555 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 338 [2021-08-13 02:36:47,555 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 336 transitions, 13437 flow. Second operand has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:47,555 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:47,555 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 338 [2021-08-13 02:36:47,555 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:47,741 INFO L129 PetriNetUnfolder]: 0/335 cut-off events. [2021-08-13 02:36:47,742 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:47,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6887 conditions, 335 events. 0/335 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 646 event pairs, 0 based on Foata normal form. 112/447 useless extension candidates. Maximal degree in co-relation 0. Up to 112 conditions per place. [2021-08-13 02:36:47,743 INFO L132 encePairwiseOnDemand]: 336/338 looper letters, 0 selfloop transitions, 1 changer transitions 0/335 dead transitions. [2021-08-13 02:36:47,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 335 transitions, 13437 flow [2021-08-13 02:36:47,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1007 transitions. [2021-08-13 02:36:47,744 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9930966469428008 [2021-08-13 02:36:47,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1007 transitions. [2021-08-13 02:36:47,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1007 transitions. [2021-08-13 02:36:47,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:47,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1007 transitions. [2021-08-13 02:36:47,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:47,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:47,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:47,746 INFO L348 CegarLoopForPetriNet]: 559 programPoint places, 1 predicate places. [2021-08-13 02:36:47,746 INFO L482 AbstractCegarLoop]: Abstraction has has 560 places, 335 transitions, 13437 flow [2021-08-13 02:36:47,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:47,746 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:47,746 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:47,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2021-08-13 02:36:47,746 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:47,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:47,746 INFO L82 PathProgramCache]: Analyzing trace with hash 948168941, now seen corresponding path program 1 times [2021-08-13 02:36:47,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:47,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914361408] [2021-08-13 02:36:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:47,792 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:47,795 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:47,822 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:47,823 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:47,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2021-08-13 02:36:47,823 WARN L235 ceAbstractionStarter]: 111 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:47,823 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 112 thread instances. [2021-08-13 02:36:47,920 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:47,920 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:47,921 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:47,921 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:47,921 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:47,921 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:47,921 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:47,921 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:47,921 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:47,921 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:47,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 566 places, 341 transitions, 13674 flow [2021-08-13 02:36:48,145 INFO L129 PetriNetUnfolder]: 0/677 cut-off events. [2021-08-13 02:36:48,145 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:48,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7342 conditions, 677 events. 0/677 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2437 event pairs, 0 based on Foata normal form. 0/564 useless extension candidates. Maximal degree in co-relation 0. Up to 113 conditions per place. [2021-08-13 02:36:48,145 INFO L82 GeneralOperation]: Start removeDead. Operand has 566 places, 341 transitions, 13674 flow [2021-08-13 02:36:48,150 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 564 places, 339 transitions, 13670 flow [2021-08-13 02:36:48,150 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:48,150 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:48,150 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:48,150 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:48,150 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:48,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:48,151 INFO L82 PathProgramCache]: Analyzing trace with hash 626467, now seen corresponding path program 1 times [2021-08-13 02:36:48,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:48,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056286592] [2021-08-13 02:36:48,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:48,189 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:48,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:48,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:48,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056286592] [2021-08-13 02:36:48,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056286592] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:48,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:48,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:48,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711749333] [2021-08-13 02:36:48,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:48,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:48,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:48,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:48,193 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 341 [2021-08-13 02:36:48,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 339 transitions, 13670 flow. Second operand has 3 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:48,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:48,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 341 [2021-08-13 02:36:48,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:48,371 INFO L129 PetriNetUnfolder]: 0/338 cut-off events. [2021-08-13 02:36:48,371 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:48,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7005 conditions, 338 events. 0/338 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 634 event pairs, 0 based on Foata normal form. 113/451 useless extension candidates. Maximal degree in co-relation 0. Up to 113 conditions per place. [2021-08-13 02:36:48,373 INFO L132 encePairwiseOnDemand]: 339/341 looper letters, 0 selfloop transitions, 1 changer transitions 0/338 dead transitions. [2021-08-13 02:36:48,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 338 transitions, 13670 flow [2021-08-13 02:36:48,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2021-08-13 02:36:48,373 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9931573802541545 [2021-08-13 02:36:48,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2021-08-13 02:36:48,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2021-08-13 02:36:48,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:48,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2021-08-13 02:36:48,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:48,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:48,375 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:48,375 INFO L348 CegarLoopForPetriNet]: 564 programPoint places, 1 predicate places. [2021-08-13 02:36:48,375 INFO L482 AbstractCegarLoop]: Abstraction has has 565 places, 338 transitions, 13670 flow [2021-08-13 02:36:48,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:48,376 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:48,376 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:48,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2021-08-13 02:36:48,376 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:48,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:48,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2125962704, now seen corresponding path program 1 times [2021-08-13 02:36:48,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:48,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819778839] [2021-08-13 02:36:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:48,425 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:48,428 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:48,453 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:48,454 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:48,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2021-08-13 02:36:48,454 WARN L235 ceAbstractionStarter]: 112 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:48,454 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 113 thread instances. [2021-08-13 02:36:48,545 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:48,545 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:48,545 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:48,545 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:48,545 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:48,545 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:48,545 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:48,545 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:48,546 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:48,546 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:48,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 571 places, 344 transitions, 13909 flow [2021-08-13 02:36:48,778 INFO L129 PetriNetUnfolder]: 0/683 cut-off events. [2021-08-13 02:36:48,778 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:48,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7464 conditions, 683 events. 0/683 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2578 event pairs, 0 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 0. Up to 114 conditions per place. [2021-08-13 02:36:48,778 INFO L82 GeneralOperation]: Start removeDead. Operand has 571 places, 344 transitions, 13909 flow [2021-08-13 02:36:48,783 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 569 places, 342 transitions, 13905 flow [2021-08-13 02:36:48,784 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:48,784 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:48,784 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:48,784 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:48,784 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:48,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:48,784 INFO L82 PathProgramCache]: Analyzing trace with hash 637475, now seen corresponding path program 1 times [2021-08-13 02:36:48,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:48,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165242094] [2021-08-13 02:36:48,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:48,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:48,824 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:48,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:48,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165242094] [2021-08-13 02:36:48,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165242094] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:48,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:48,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:48,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282404640] [2021-08-13 02:36:48,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:48,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:48,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:48,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:48,828 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 344 [2021-08-13 02:36:48,828 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 342 transitions, 13905 flow. Second operand has 3 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:48,828 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:48,828 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 344 [2021-08-13 02:36:48,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:49,164 INFO L129 PetriNetUnfolder]: 0/341 cut-off events. [2021-08-13 02:36:49,164 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:49,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7124 conditions, 341 events. 0/341 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 690 event pairs, 0 based on Foata normal form. 114/455 useless extension candidates. Maximal degree in co-relation 0. Up to 114 conditions per place. [2021-08-13 02:36:49,165 INFO L132 encePairwiseOnDemand]: 342/344 looper letters, 0 selfloop transitions, 1 changer transitions 0/341 dead transitions. [2021-08-13 02:36:49,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 341 transitions, 13905 flow [2021-08-13 02:36:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1025 transitions. [2021-08-13 02:36:49,166 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9932170542635659 [2021-08-13 02:36:49,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1025 transitions. [2021-08-13 02:36:49,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1025 transitions. [2021-08-13 02:36:49,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:49,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1025 transitions. [2021-08-13 02:36:49,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:49,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:49,168 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:49,168 INFO L348 CegarLoopForPetriNet]: 569 programPoint places, 1 predicate places. [2021-08-13 02:36:49,168 INFO L482 AbstractCegarLoop]: Abstraction has has 570 places, 341 transitions, 13905 flow [2021-08-13 02:36:49,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:49,168 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:49,168 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:49,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2021-08-13 02:36:49,168 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:49,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:49,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1212322745, now seen corresponding path program 1 times [2021-08-13 02:36:49,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:49,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185067337] [2021-08-13 02:36:49,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:49,207 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:49,210 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:49,243 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:49,243 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:49,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-08-13 02:36:49,244 WARN L235 ceAbstractionStarter]: 113 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:49,244 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 114 thread instances. [2021-08-13 02:36:49,340 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:49,341 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:49,341 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:49,341 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:49,341 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:49,341 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:49,341 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:49,341 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:49,341 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:49,341 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:49,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 576 places, 347 transitions, 14146 flow [2021-08-13 02:36:49,587 INFO L129 PetriNetUnfolder]: 0/689 cut-off events. [2021-08-13 02:36:49,587 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:49,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7587 conditions, 689 events. 0/689 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2639 event pairs, 0 based on Foata normal form. 0/574 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2021-08-13 02:36:49,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 576 places, 347 transitions, 14146 flow [2021-08-13 02:36:49,592 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 574 places, 345 transitions, 14142 flow [2021-08-13 02:36:49,593 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:49,593 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:49,593 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:49,593 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:49,593 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:49,593 INFO L82 PathProgramCache]: Analyzing trace with hash 648579, now seen corresponding path program 1 times [2021-08-13 02:36:49,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:49,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693204314] [2021-08-13 02:36:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:49,632 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:49,632 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:49,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:49,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693204314] [2021-08-13 02:36:49,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693204314] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:49,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:49,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:49,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364577679] [2021-08-13 02:36:49,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:49,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:49,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:49,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:49,636 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 347 [2021-08-13 02:36:49,636 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 345 transitions, 14142 flow. Second operand has 3 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:49,636 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:49,636 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 347 [2021-08-13 02:36:49,636 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:49,819 INFO L129 PetriNetUnfolder]: 0/344 cut-off events. [2021-08-13 02:36:49,820 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:49,820 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7244 conditions, 344 events. 0/344 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 601 event pairs, 0 based on Foata normal form. 115/459 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2021-08-13 02:36:49,821 INFO L132 encePairwiseOnDemand]: 345/347 looper letters, 0 selfloop transitions, 1 changer transitions 0/344 dead transitions. [2021-08-13 02:36:49,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 344 transitions, 14142 flow [2021-08-13 02:36:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1034 transitions. [2021-08-13 02:36:49,821 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9932756964457252 [2021-08-13 02:36:49,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1034 transitions. [2021-08-13 02:36:49,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1034 transitions. [2021-08-13 02:36:49,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:49,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1034 transitions. [2021-08-13 02:36:49,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:49,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:49,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:49,823 INFO L348 CegarLoopForPetriNet]: 574 programPoint places, 1 predicate places. [2021-08-13 02:36:49,823 INFO L482 AbstractCegarLoop]: Abstraction has has 575 places, 344 transitions, 14142 flow [2021-08-13 02:36:49,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:49,823 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:49,823 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:49,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2021-08-13 02:36:49,823 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:49,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:49,823 INFO L82 PathProgramCache]: Analyzing trace with hash -233679533, now seen corresponding path program 1 times [2021-08-13 02:36:49,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:49,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897851621] [2021-08-13 02:36:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:49,862 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:49,865 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:49,896 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:49,896 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:49,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2021-08-13 02:36:49,897 WARN L235 ceAbstractionStarter]: 114 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:49,897 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 115 thread instances. [2021-08-13 02:36:49,985 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:49,986 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:49,986 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:49,986 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:49,986 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:49,986 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:49,987 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:49,987 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:49,987 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:49,987 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:49,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 581 places, 350 transitions, 14385 flow [2021-08-13 02:36:50,225 INFO L129 PetriNetUnfolder]: 0/695 cut-off events. [2021-08-13 02:36:50,225 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:50,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7711 conditions, 695 events. 0/695 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2519 event pairs, 0 based on Foata normal form. 0/579 useless extension candidates. Maximal degree in co-relation 0. Up to 116 conditions per place. [2021-08-13 02:36:50,225 INFO L82 GeneralOperation]: Start removeDead. Operand has 581 places, 350 transitions, 14385 flow [2021-08-13 02:36:50,230 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 579 places, 348 transitions, 14381 flow [2021-08-13 02:36:50,231 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:50,231 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:50,231 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:50,231 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:50,231 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:50,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:50,231 INFO L82 PathProgramCache]: Analyzing trace with hash 659779, now seen corresponding path program 1 times [2021-08-13 02:36:50,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:50,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936442788] [2021-08-13 02:36:50,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:50,270 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:50,270 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:50,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:50,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936442788] [2021-08-13 02:36:50,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936442788] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:50,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:50,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:50,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967128469] [2021-08-13 02:36:50,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:50,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:50,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:50,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:50,274 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 350 [2021-08-13 02:36:50,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 348 transitions, 14381 flow. Second operand has 3 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:50,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:50,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 350 [2021-08-13 02:36:50,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:50,460 INFO L129 PetriNetUnfolder]: 0/347 cut-off events. [2021-08-13 02:36:50,461 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:50,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7365 conditions, 347 events. 0/347 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 665 event pairs, 0 based on Foata normal form. 116/463 useless extension candidates. Maximal degree in co-relation 0. Up to 116 conditions per place. [2021-08-13 02:36:50,462 INFO L132 encePairwiseOnDemand]: 348/350 looper letters, 0 selfloop transitions, 1 changer transitions 0/347 dead transitions. [2021-08-13 02:36:50,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 347 transitions, 14381 flow [2021-08-13 02:36:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:50,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1043 transitions. [2021-08-13 02:36:50,462 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9933333333333333 [2021-08-13 02:36:50,462 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1043 transitions. [2021-08-13 02:36:50,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1043 transitions. [2021-08-13 02:36:50,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:50,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1043 transitions. [2021-08-13 02:36:50,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:50,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:50,464 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:50,464 INFO L348 CegarLoopForPetriNet]: 579 programPoint places, 1 predicate places. [2021-08-13 02:36:50,464 INFO L482 AbstractCegarLoop]: Abstraction has has 580 places, 347 transitions, 14381 flow [2021-08-13 02:36:50,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:50,464 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:50,464 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:50,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2021-08-13 02:36:50,464 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:50,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:50,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1707632977, now seen corresponding path program 1 times [2021-08-13 02:36:50,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:50,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175277245] [2021-08-13 02:36:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:50,507 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:50,511 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:50,544 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:50,545 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:50,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2021-08-13 02:36:50,545 WARN L235 ceAbstractionStarter]: 115 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:50,545 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 116 thread instances. [2021-08-13 02:36:50,787 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:50,788 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:50,788 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:50,788 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:50,788 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:50,788 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:50,788 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:50,788 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:50,788 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:50,788 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:50,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 586 places, 353 transitions, 14626 flow [2021-08-13 02:36:51,031 INFO L129 PetriNetUnfolder]: 0/701 cut-off events. [2021-08-13 02:36:51,032 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:51,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7836 conditions, 701 events. 0/701 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2538 event pairs, 0 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 0. Up to 117 conditions per place. [2021-08-13 02:36:51,032 INFO L82 GeneralOperation]: Start removeDead. Operand has 586 places, 353 transitions, 14626 flow [2021-08-13 02:36:51,036 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 584 places, 351 transitions, 14622 flow [2021-08-13 02:36:51,037 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:51,037 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:51,037 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:51,037 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:51,037 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:51,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:51,038 INFO L82 PathProgramCache]: Analyzing trace with hash 671075, now seen corresponding path program 1 times [2021-08-13 02:36:51,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:51,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62178356] [2021-08-13 02:36:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:51,077 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:51,077 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:51,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:51,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62178356] [2021-08-13 02:36:51,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62178356] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:51,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:51,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:51,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355817303] [2021-08-13 02:36:51,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:51,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:51,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:51,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:51,080 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 350 out of 353 [2021-08-13 02:36:51,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 351 transitions, 14622 flow. Second operand has 3 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:51,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:51,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 350 of 353 [2021-08-13 02:36:51,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:51,272 INFO L129 PetriNetUnfolder]: 0/350 cut-off events. [2021-08-13 02:36:51,272 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:51,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7487 conditions, 350 events. 0/350 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 671 event pairs, 0 based on Foata normal form. 117/467 useless extension candidates. Maximal degree in co-relation 0. Up to 117 conditions per place. [2021-08-13 02:36:51,273 INFO L132 encePairwiseOnDemand]: 351/353 looper letters, 0 selfloop transitions, 1 changer transitions 0/350 dead transitions. [2021-08-13 02:36:51,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 350 transitions, 14622 flow [2021-08-13 02:36:51,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:51,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2021-08-13 02:36:51,274 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9933899905571294 [2021-08-13 02:36:51,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2021-08-13 02:36:51,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2021-08-13 02:36:51,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:51,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2021-08-13 02:36:51,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:51,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:51,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:51,276 INFO L348 CegarLoopForPetriNet]: 584 programPoint places, 1 predicate places. [2021-08-13 02:36:51,276 INFO L482 AbstractCegarLoop]: Abstraction has has 585 places, 350 transitions, 14622 flow [2021-08-13 02:36:51,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:51,276 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:51,276 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:51,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2021-08-13 02:36:51,276 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:51,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:51,277 INFO L82 PathProgramCache]: Analyzing trace with hash -767531754, now seen corresponding path program 1 times [2021-08-13 02:36:51,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:51,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999735522] [2021-08-13 02:36:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:51,324 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:51,326 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:51,357 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:51,358 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:51,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2021-08-13 02:36:51,358 WARN L235 ceAbstractionStarter]: 116 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:51,358 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 117 thread instances. [2021-08-13 02:36:51,452 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:51,452 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:51,452 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:51,452 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:51,452 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:51,453 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:51,453 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:51,453 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:51,453 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:51,453 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:51,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 591 places, 356 transitions, 14869 flow [2021-08-13 02:36:51,701 INFO L129 PetriNetUnfolder]: 0/707 cut-off events. [2021-08-13 02:36:51,701 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:51,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7962 conditions, 707 events. 0/707 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2675 event pairs, 0 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 0. Up to 118 conditions per place. [2021-08-13 02:36:51,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 591 places, 356 transitions, 14869 flow [2021-08-13 02:36:51,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 589 places, 354 transitions, 14865 flow [2021-08-13 02:36:51,707 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:51,707 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:51,707 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:51,707 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:51,707 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:51,708 INFO L82 PathProgramCache]: Analyzing trace with hash 682467, now seen corresponding path program 1 times [2021-08-13 02:36:51,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:51,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967459777] [2021-08-13 02:36:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:51,749 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:51,749 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:51,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:51,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967459777] [2021-08-13 02:36:51,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967459777] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:51,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:51,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:51,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141473130] [2021-08-13 02:36:51,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:51,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:51,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:51,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:51,752 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 353 out of 356 [2021-08-13 02:36:51,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 354 transitions, 14865 flow. Second operand has 3 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:51,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:51,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 353 of 356 [2021-08-13 02:36:51,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:51,947 INFO L129 PetriNetUnfolder]: 0/353 cut-off events. [2021-08-13 02:36:51,947 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:51,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7610 conditions, 353 events. 0/353 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 653 event pairs, 0 based on Foata normal form. 118/471 useless extension candidates. Maximal degree in co-relation 0. Up to 118 conditions per place. [2021-08-13 02:36:51,948 INFO L132 encePairwiseOnDemand]: 354/356 looper letters, 0 selfloop transitions, 1 changer transitions 0/353 dead transitions. [2021-08-13 02:36:51,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 353 transitions, 14865 flow [2021-08-13 02:36:51,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:51,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1061 transitions. [2021-08-13 02:36:51,949 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9934456928838952 [2021-08-13 02:36:51,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1061 transitions. [2021-08-13 02:36:51,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1061 transitions. [2021-08-13 02:36:51,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:51,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1061 transitions. [2021-08-13 02:36:51,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:51,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:51,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:51,950 INFO L348 CegarLoopForPetriNet]: 589 programPoint places, 1 predicate places. [2021-08-13 02:36:51,950 INFO L482 AbstractCegarLoop]: Abstraction has has 590 places, 353 transitions, 14865 flow [2021-08-13 02:36:51,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:51,951 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:51,951 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:51,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2021-08-13 02:36:51,951 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:51,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:51,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1177259317, now seen corresponding path program 1 times [2021-08-13 02:36:51,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:51,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058755648] [2021-08-13 02:36:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:51,993 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:51,996 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:52,031 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:52,031 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:52,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2021-08-13 02:36:52,031 WARN L235 ceAbstractionStarter]: 117 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:52,031 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 118 thread instances. [2021-08-13 02:36:52,132 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:52,133 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:52,133 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:52,133 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:52,133 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:52,133 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:52,133 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:52,133 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:52,133 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:52,133 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:52,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 596 places, 359 transitions, 15114 flow [2021-08-13 02:36:52,393 INFO L129 PetriNetUnfolder]: 0/713 cut-off events. [2021-08-13 02:36:52,393 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:52,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8089 conditions, 713 events. 0/713 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2613 event pairs, 0 based on Foata normal form. 0/594 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2021-08-13 02:36:52,394 INFO L82 GeneralOperation]: Start removeDead. Operand has 596 places, 359 transitions, 15114 flow [2021-08-13 02:36:52,399 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 594 places, 357 transitions, 15110 flow [2021-08-13 02:36:52,399 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:52,399 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:52,399 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:52,399 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:52,399 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:52,400 INFO L82 PathProgramCache]: Analyzing trace with hash 693955, now seen corresponding path program 1 times [2021-08-13 02:36:52,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:52,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438846823] [2021-08-13 02:36:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:52,442 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:52,442 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:52,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:52,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438846823] [2021-08-13 02:36:52,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438846823] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:52,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:52,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:52,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85023182] [2021-08-13 02:36:52,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:52,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:52,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:52,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:52,445 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 356 out of 359 [2021-08-13 02:36:52,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 357 transitions, 15110 flow. Second operand has 3 states, 3 states have (on average 356.6666666666667) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:52,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:52,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 356 of 359 [2021-08-13 02:36:52,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:52,644 INFO L129 PetriNetUnfolder]: 0/356 cut-off events. [2021-08-13 02:36:52,645 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:52,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7734 conditions, 356 events. 0/356 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 662 event pairs, 0 based on Foata normal form. 119/475 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2021-08-13 02:36:52,646 INFO L132 encePairwiseOnDemand]: 357/359 looper letters, 0 selfloop transitions, 1 changer transitions 0/356 dead transitions. [2021-08-13 02:36:52,646 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 356 transitions, 15110 flow [2021-08-13 02:36:52,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:52,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:52,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1070 transitions. [2021-08-13 02:36:52,646 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9935004642525533 [2021-08-13 02:36:52,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1070 transitions. [2021-08-13 02:36:52,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1070 transitions. [2021-08-13 02:36:52,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:52,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1070 transitions. [2021-08-13 02:36:52,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.6666666666667) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:52,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:52,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:52,648 INFO L348 CegarLoopForPetriNet]: 594 programPoint places, 1 predicate places. [2021-08-13 02:36:52,648 INFO L482 AbstractCegarLoop]: Abstraction has has 595 places, 356 transitions, 15110 flow [2021-08-13 02:36:52,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 356.6666666666667) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:52,648 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:52,648 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:52,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2021-08-13 02:36:52,648 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:52,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:52,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1225165209, now seen corresponding path program 1 times [2021-08-13 02:36:52,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:52,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648506582] [2021-08-13 02:36:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:52,689 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:52,693 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:52,727 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:52,727 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:52,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2021-08-13 02:36:52,727 WARN L235 ceAbstractionStarter]: 118 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:52,727 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 119 thread instances. [2021-08-13 02:36:52,934 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:52,934 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:52,934 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:52,934 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:52,934 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:52,935 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:52,935 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:52,935 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:52,935 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:52,935 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:52,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 601 places, 362 transitions, 15361 flow [2021-08-13 02:36:53,193 INFO L129 PetriNetUnfolder]: 0/719 cut-off events. [2021-08-13 02:36:53,194 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:53,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8217 conditions, 719 events. 0/719 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2717 event pairs, 0 based on Foata normal form. 0/599 useless extension candidates. Maximal degree in co-relation 0. Up to 120 conditions per place. [2021-08-13 02:36:53,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 601 places, 362 transitions, 15361 flow [2021-08-13 02:36:53,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 599 places, 360 transitions, 15357 flow [2021-08-13 02:36:53,201 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:53,201 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:53,201 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:53,201 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:53,201 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:53,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:53,201 INFO L82 PathProgramCache]: Analyzing trace with hash 705539, now seen corresponding path program 1 times [2021-08-13 02:36:53,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:53,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389619772] [2021-08-13 02:36:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:53,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:53,242 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:53,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:53,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389619772] [2021-08-13 02:36:53,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389619772] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:53,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:53,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:53,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009139132] [2021-08-13 02:36:53,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:53,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:53,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:53,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:53,246 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 362 [2021-08-13 02:36:53,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 360 transitions, 15357 flow. Second operand has 3 states, 3 states have (on average 359.6666666666667) internal successors, (1079), 3 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:53,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:53,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 362 [2021-08-13 02:36:53,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:53,449 INFO L129 PetriNetUnfolder]: 0/359 cut-off events. [2021-08-13 02:36:53,450 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:53,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7859 conditions, 359 events. 0/359 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 751 event pairs, 0 based on Foata normal form. 120/479 useless extension candidates. Maximal degree in co-relation 0. Up to 120 conditions per place. [2021-08-13 02:36:53,451 INFO L132 encePairwiseOnDemand]: 360/362 looper letters, 0 selfloop transitions, 1 changer transitions 0/359 dead transitions. [2021-08-13 02:36:53,451 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 359 transitions, 15357 flow [2021-08-13 02:36:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1079 transitions. [2021-08-13 02:36:53,452 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9935543278084714 [2021-08-13 02:36:53,452 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1079 transitions. [2021-08-13 02:36:53,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1079 transitions. [2021-08-13 02:36:53,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:53,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1079 transitions. [2021-08-13 02:36:53,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.6666666666667) internal successors, (1079), 3 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:53,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:53,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:53,454 INFO L348 CegarLoopForPetriNet]: 599 programPoint places, 1 predicate places. [2021-08-13 02:36:53,454 INFO L482 AbstractCegarLoop]: Abstraction has has 600 places, 359 transitions, 15357 flow [2021-08-13 02:36:53,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 359.6666666666667) internal successors, (1079), 3 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:53,454 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:53,454 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:53,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2021-08-13 02:36:53,454 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:53,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2146460389, now seen corresponding path program 1 times [2021-08-13 02:36:53,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:53,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270336924] [2021-08-13 02:36:53,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:53,508 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:53,511 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:53,547 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:53,547 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:53,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2021-08-13 02:36:53,548 WARN L235 ceAbstractionStarter]: 119 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:53,548 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 120 thread instances. [2021-08-13 02:36:53,655 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:53,655 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:53,656 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:53,656 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:53,656 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:53,656 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:53,656 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:53,656 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:53,656 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:53,656 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:53,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 606 places, 365 transitions, 15610 flow [2021-08-13 02:36:53,936 INFO L129 PetriNetUnfolder]: 0/725 cut-off events. [2021-08-13 02:36:53,936 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:53,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8346 conditions, 725 events. 0/725 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2616 event pairs, 0 based on Foata normal form. 0/604 useless extension candidates. Maximal degree in co-relation 0. Up to 121 conditions per place. [2021-08-13 02:36:53,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 606 places, 365 transitions, 15610 flow [2021-08-13 02:36:53,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 604 places, 363 transitions, 15606 flow [2021-08-13 02:36:53,942 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:53,942 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:53,942 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:53,942 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:53,942 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:53,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:53,943 INFO L82 PathProgramCache]: Analyzing trace with hash 717219, now seen corresponding path program 1 times [2021-08-13 02:36:53,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:53,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131997716] [2021-08-13 02:36:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:53,984 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:53,985 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:53,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:53,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131997716] [2021-08-13 02:36:53,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131997716] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:53,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:53,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:53,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849009240] [2021-08-13 02:36:53,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:53,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:53,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:53,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:53,988 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 365 [2021-08-13 02:36:53,988 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 363 transitions, 15606 flow. Second operand has 3 states, 3 states have (on average 362.6666666666667) internal successors, (1088), 3 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:53,988 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:53,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 365 [2021-08-13 02:36:53,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:54,195 INFO L129 PetriNetUnfolder]: 0/362 cut-off events. [2021-08-13 02:36:54,195 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:54,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7985 conditions, 362 events. 0/362 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 629 event pairs, 0 based on Foata normal form. 121/483 useless extension candidates. Maximal degree in co-relation 0. Up to 121 conditions per place. [2021-08-13 02:36:54,196 INFO L132 encePairwiseOnDemand]: 363/365 looper letters, 0 selfloop transitions, 1 changer transitions 0/362 dead transitions. [2021-08-13 02:36:54,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 362 transitions, 15606 flow [2021-08-13 02:36:54,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:54,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1088 transitions. [2021-08-13 02:36:54,197 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.993607305936073 [2021-08-13 02:36:54,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1088 transitions. [2021-08-13 02:36:54,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1088 transitions. [2021-08-13 02:36:54,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:54,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1088 transitions. [2021-08-13 02:36:54,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 362.6666666666667) internal successors, (1088), 3 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:54,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:54,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:54,199 INFO L348 CegarLoopForPetriNet]: 604 programPoint places, 1 predicate places. [2021-08-13 02:36:54,199 INFO L482 AbstractCegarLoop]: Abstraction has has 605 places, 362 transitions, 15606 flow [2021-08-13 02:36:54,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 362.6666666666667) internal successors, (1088), 3 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:54,200 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:54,200 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:54,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2021-08-13 02:36:54,200 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:54,200 INFO L82 PathProgramCache]: Analyzing trace with hash -583844004, now seen corresponding path program 1 times [2021-08-13 02:36:54,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:54,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459145390] [2021-08-13 02:36:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:54,259 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:54,262 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:54,300 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:54,300 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:54,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2021-08-13 02:36:54,301 WARN L235 ceAbstractionStarter]: 120 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:54,301 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 121 thread instances. [2021-08-13 02:36:54,428 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:54,428 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:54,429 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:54,429 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:54,429 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:54,429 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:54,429 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:54,429 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:54,429 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:54,429 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:54,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 611 places, 368 transitions, 15861 flow [2021-08-13 02:36:54,885 INFO L129 PetriNetUnfolder]: 0/731 cut-off events. [2021-08-13 02:36:54,885 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:54,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8476 conditions, 731 events. 0/731 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2759 event pairs, 0 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 0. Up to 122 conditions per place. [2021-08-13 02:36:54,885 INFO L82 GeneralOperation]: Start removeDead. Operand has 611 places, 368 transitions, 15861 flow [2021-08-13 02:36:54,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 609 places, 366 transitions, 15857 flow [2021-08-13 02:36:54,891 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:54,891 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:54,891 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:54,891 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:54,891 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:54,892 INFO L82 PathProgramCache]: Analyzing trace with hash 728995, now seen corresponding path program 1 times [2021-08-13 02:36:54,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:54,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832914480] [2021-08-13 02:36:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:54,942 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:54,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:54,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:54,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832914480] [2021-08-13 02:36:54,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832914480] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:54,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:54,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:54,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965819761] [2021-08-13 02:36:54,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:54,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:54,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:54,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:54,945 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 368 [2021-08-13 02:36:54,946 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 366 transitions, 15857 flow. Second operand has 3 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:54,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:54,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 368 [2021-08-13 02:36:54,946 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:55,190 INFO L129 PetriNetUnfolder]: 0/365 cut-off events. [2021-08-13 02:36:55,190 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:55,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8112 conditions, 365 events. 0/365 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 729 event pairs, 0 based on Foata normal form. 122/487 useless extension candidates. Maximal degree in co-relation 0. Up to 122 conditions per place. [2021-08-13 02:36:55,191 INFO L132 encePairwiseOnDemand]: 366/368 looper letters, 0 selfloop transitions, 1 changer transitions 0/365 dead transitions. [2021-08-13 02:36:55,191 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 365 transitions, 15857 flow [2021-08-13 02:36:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:55,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1097 transitions. [2021-08-13 02:36:55,192 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9936594202898551 [2021-08-13 02:36:55,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1097 transitions. [2021-08-13 02:36:55,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1097 transitions. [2021-08-13 02:36:55,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:55,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1097 transitions. [2021-08-13 02:36:55,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:55,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:55,194 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:55,194 INFO L348 CegarLoopForPetriNet]: 609 programPoint places, 1 predicate places. [2021-08-13 02:36:55,194 INFO L482 AbstractCegarLoop]: Abstraction has has 610 places, 365 transitions, 15857 flow [2021-08-13 02:36:55,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:55,194 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:55,195 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:55,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2021-08-13 02:36:55,195 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:55,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1667658271, now seen corresponding path program 1 times [2021-08-13 02:36:55,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:55,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576733190] [2021-08-13 02:36:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:55,244 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:55,247 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:55,283 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:55,284 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:55,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2021-08-13 02:36:55,284 WARN L235 ceAbstractionStarter]: 121 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:55,284 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 122 thread instances. [2021-08-13 02:36:55,392 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:55,392 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:55,393 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:55,393 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:55,393 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:55,393 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:55,393 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:55,393 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:55,393 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:55,393 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:55,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 616 places, 371 transitions, 16114 flow [2021-08-13 02:36:55,684 INFO L129 PetriNetUnfolder]: 0/737 cut-off events. [2021-08-13 02:36:55,684 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:55,684 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8607 conditions, 737 events. 0/737 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2763 event pairs, 0 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2021-08-13 02:36:55,684 INFO L82 GeneralOperation]: Start removeDead. Operand has 616 places, 371 transitions, 16114 flow [2021-08-13 02:36:55,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 614 places, 369 transitions, 16110 flow [2021-08-13 02:36:55,690 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:55,690 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:55,690 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:55,690 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:55,690 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:55,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:55,690 INFO L82 PathProgramCache]: Analyzing trace with hash 740867, now seen corresponding path program 1 times [2021-08-13 02:36:55,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:55,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97843384] [2021-08-13 02:36:55,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:55,864 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:55,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:55,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:55,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97843384] [2021-08-13 02:36:55,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97843384] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:55,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:55,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:55,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702229458] [2021-08-13 02:36:55,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:55,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:55,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:55,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:55,868 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 368 out of 371 [2021-08-13 02:36:55,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 369 transitions, 16110 flow. Second operand has 3 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:55,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:55,868 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 368 of 371 [2021-08-13 02:36:55,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:56,079 INFO L129 PetriNetUnfolder]: 0/368 cut-off events. [2021-08-13 02:36:56,079 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:56,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8240 conditions, 368 events. 0/368 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 678 event pairs, 0 based on Foata normal form. 123/491 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2021-08-13 02:36:56,080 INFO L132 encePairwiseOnDemand]: 369/371 looper letters, 0 selfloop transitions, 1 changer transitions 0/368 dead transitions. [2021-08-13 02:36:56,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 368 transitions, 16110 flow [2021-08-13 02:36:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1106 transitions. [2021-08-13 02:36:56,081 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9937106918238994 [2021-08-13 02:36:56,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1106 transitions. [2021-08-13 02:36:56,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1106 transitions. [2021-08-13 02:36:56,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:56,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1106 transitions. [2021-08-13 02:36:56,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:56,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:56,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:56,083 INFO L348 CegarLoopForPetriNet]: 614 programPoint places, 1 predicate places. [2021-08-13 02:36:56,083 INFO L482 AbstractCegarLoop]: Abstraction has has 615 places, 368 transitions, 16110 flow [2021-08-13 02:36:56,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:56,083 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:56,083 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:56,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2021-08-13 02:36:56,083 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:56,083 INFO L82 PathProgramCache]: Analyzing trace with hash 873382623, now seen corresponding path program 1 times [2021-08-13 02:36:56,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:56,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806342476] [2021-08-13 02:36:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:56,129 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:56,132 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:56,163 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:56,164 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:56,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2021-08-13 02:36:56,164 WARN L235 ceAbstractionStarter]: 122 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:56,164 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 123 thread instances. [2021-08-13 02:36:56,260 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:56,261 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:56,261 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:56,261 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:56,261 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:56,261 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:56,261 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:56,261 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:56,261 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:56,261 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:56,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 621 places, 374 transitions, 16369 flow [2021-08-13 02:36:56,543 INFO L129 PetriNetUnfolder]: 0/743 cut-off events. [2021-08-13 02:36:56,543 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:56,543 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8739 conditions, 743 events. 0/743 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2799 event pairs, 0 based on Foata normal form. 0/619 useless extension candidates. Maximal degree in co-relation 0. Up to 124 conditions per place. [2021-08-13 02:36:56,543 INFO L82 GeneralOperation]: Start removeDead. Operand has 621 places, 374 transitions, 16369 flow [2021-08-13 02:36:56,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 619 places, 372 transitions, 16365 flow [2021-08-13 02:36:56,549 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:56,549 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:56,549 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:56,549 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:56,549 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:56,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:56,550 INFO L82 PathProgramCache]: Analyzing trace with hash 752835, now seen corresponding path program 1 times [2021-08-13 02:36:56,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:56,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103252559] [2021-08-13 02:36:56,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:56,593 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:56,593 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:56,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:56,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103252559] [2021-08-13 02:36:56,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103252559] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:56,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:56,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:56,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131073153] [2021-08-13 02:36:56,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:56,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:56,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:56,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:56,596 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 371 out of 374 [2021-08-13 02:36:56,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 372 transitions, 16365 flow. Second operand has 3 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:56,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:56,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 371 of 374 [2021-08-13 02:36:56,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:56,817 INFO L129 PetriNetUnfolder]: 0/371 cut-off events. [2021-08-13 02:36:56,817 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:56,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8369 conditions, 371 events. 0/371 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 724 event pairs, 0 based on Foata normal form. 124/495 useless extension candidates. Maximal degree in co-relation 0. Up to 124 conditions per place. [2021-08-13 02:36:56,818 INFO L132 encePairwiseOnDemand]: 372/374 looper letters, 0 selfloop transitions, 1 changer transitions 0/371 dead transitions. [2021-08-13 02:36:56,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 371 transitions, 16365 flow [2021-08-13 02:36:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:56,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1115 transitions. [2021-08-13 02:36:56,819 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9937611408199644 [2021-08-13 02:36:56,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1115 transitions. [2021-08-13 02:36:56,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1115 transitions. [2021-08-13 02:36:56,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:56,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1115 transitions. [2021-08-13 02:36:56,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:56,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:56,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:56,821 INFO L348 CegarLoopForPetriNet]: 619 programPoint places, 1 predicate places. [2021-08-13 02:36:56,821 INFO L482 AbstractCegarLoop]: Abstraction has has 620 places, 371 transitions, 16365 flow [2021-08-13 02:36:56,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:56,821 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:56,821 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:56,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2021-08-13 02:36:56,821 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:56,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1539837527, now seen corresponding path program 1 times [2021-08-13 02:36:56,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:56,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178811024] [2021-08-13 02:36:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:56,867 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:56,870 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:56,909 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:56,909 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:56,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2021-08-13 02:36:56,909 WARN L235 ceAbstractionStarter]: 123 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:56,909 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 124 thread instances. [2021-08-13 02:36:57,013 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:57,014 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:57,014 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:57,014 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:57,014 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:57,014 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:57,015 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:57,015 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:57,015 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:57,015 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:57,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 626 places, 377 transitions, 16626 flow [2021-08-13 02:36:57,320 INFO L129 PetriNetUnfolder]: 0/749 cut-off events. [2021-08-13 02:36:57,320 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:57,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8872 conditions, 749 events. 0/749 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2678 event pairs, 0 based on Foata normal form. 0/624 useless extension candidates. Maximal degree in co-relation 0. Up to 125 conditions per place. [2021-08-13 02:36:57,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 626 places, 377 transitions, 16626 flow [2021-08-13 02:36:57,326 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 624 places, 375 transitions, 16622 flow [2021-08-13 02:36:57,326 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:36:57,326 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:57,326 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:57,327 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:57,327 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:57,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:57,327 INFO L82 PathProgramCache]: Analyzing trace with hash 764899, now seen corresponding path program 1 times [2021-08-13 02:36:57,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:57,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000421096] [2021-08-13 02:36:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:57,372 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:57,372 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:57,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:57,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000421096] [2021-08-13 02:36:57,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000421096] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:57,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:57,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:57,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738646205] [2021-08-13 02:36:57,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:57,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:57,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:57,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:57,376 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 374 out of 377 [2021-08-13 02:36:57,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 624 places, 375 transitions, 16622 flow. Second operand has 3 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:57,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:57,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 374 of 377 [2021-08-13 02:36:57,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:57,614 INFO L129 PetriNetUnfolder]: 0/374 cut-off events. [2021-08-13 02:36:57,614 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:57,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8499 conditions, 374 events. 0/374 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 703 event pairs, 0 based on Foata normal form. 125/499 useless extension candidates. Maximal degree in co-relation 0. Up to 125 conditions per place. [2021-08-13 02:36:57,615 INFO L132 encePairwiseOnDemand]: 375/377 looper letters, 0 selfloop transitions, 1 changer transitions 0/374 dead transitions. [2021-08-13 02:36:57,615 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 374 transitions, 16622 flow [2021-08-13 02:36:57,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:57,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2021-08-13 02:36:57,616 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9938107869142352 [2021-08-13 02:36:57,616 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2021-08-13 02:36:57,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2021-08-13 02:36:57,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:57,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2021-08-13 02:36:57,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:57,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:57,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:57,617 INFO L348 CegarLoopForPetriNet]: 624 programPoint places, 1 predicate places. [2021-08-13 02:36:57,617 INFO L482 AbstractCegarLoop]: Abstraction has has 625 places, 374 transitions, 16622 flow [2021-08-13 02:36:57,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:57,617 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:57,618 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:57,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2021-08-13 02:36:57,618 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:57,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:57,618 INFO L82 PathProgramCache]: Analyzing trace with hash 415961250, now seen corresponding path program 1 times [2021-08-13 02:36:57,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:57,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261138881] [2021-08-13 02:36:57,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:57,827 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:57,829 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:57,856 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:57,856 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:57,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2021-08-13 02:36:57,856 WARN L235 ceAbstractionStarter]: 124 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:57,856 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 125 thread instances. [2021-08-13 02:36:57,955 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:57,955 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:57,956 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:57,956 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:57,956 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:57,956 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:57,956 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:57,956 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:57,956 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:57,956 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:57,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 631 places, 380 transitions, 16885 flow [2021-08-13 02:36:58,398 INFO L129 PetriNetUnfolder]: 0/755 cut-off events. [2021-08-13 02:36:58,398 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:58,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9006 conditions, 755 events. 0/755 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2850 event pairs, 0 based on Foata normal form. 0/629 useless extension candidates. Maximal degree in co-relation 0. Up to 126 conditions per place. [2021-08-13 02:36:58,399 INFO L82 GeneralOperation]: Start removeDead. Operand has 631 places, 380 transitions, 16885 flow [2021-08-13 02:36:58,404 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 629 places, 378 transitions, 16881 flow [2021-08-13 02:36:58,405 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:58,405 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:58,405 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:58,405 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:58,405 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:58,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:58,405 INFO L82 PathProgramCache]: Analyzing trace with hash 777059, now seen corresponding path program 1 times [2021-08-13 02:36:58,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:58,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166964003] [2021-08-13 02:36:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:58,455 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:58,455 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:58,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:58,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166964003] [2021-08-13 02:36:58,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166964003] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:58,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:58,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:58,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805047017] [2021-08-13 02:36:58,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:58,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:58,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:58,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:58,458 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 380 [2021-08-13 02:36:58,459 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 629 places, 378 transitions, 16881 flow. Second operand has 3 states, 3 states have (on average 377.6666666666667) internal successors, (1133), 3 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:58,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:58,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 380 [2021-08-13 02:36:58,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:58,840 INFO L129 PetriNetUnfolder]: 0/377 cut-off events. [2021-08-13 02:36:58,840 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:58,841 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8630 conditions, 377 events. 0/377 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 751 event pairs, 0 based on Foata normal form. 126/503 useless extension candidates. Maximal degree in co-relation 0. Up to 126 conditions per place. [2021-08-13 02:36:58,842 INFO L132 encePairwiseOnDemand]: 378/380 looper letters, 0 selfloop transitions, 1 changer transitions 0/377 dead transitions. [2021-08-13 02:36:58,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 377 transitions, 16881 flow [2021-08-13 02:36:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1133 transitions. [2021-08-13 02:36:58,843 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.993859649122807 [2021-08-13 02:36:58,843 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1133 transitions. [2021-08-13 02:36:58,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1133 transitions. [2021-08-13 02:36:58,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:58,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1133 transitions. [2021-08-13 02:36:58,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 377.6666666666667) internal successors, (1133), 3 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:58,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:58,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:58,844 INFO L348 CegarLoopForPetriNet]: 629 programPoint places, 1 predicate places. [2021-08-13 02:36:58,844 INFO L482 AbstractCegarLoop]: Abstraction has has 630 places, 377 transitions, 16881 flow [2021-08-13 02:36:58,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 377.6666666666667) internal successors, (1133), 3 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:58,845 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:58,845 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:58,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2021-08-13 02:36:58,845 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:58,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:58,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1560628803, now seen corresponding path program 1 times [2021-08-13 02:36:58,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:58,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364712683] [2021-08-13 02:36:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:58,899 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:58,902 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:58,936 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:58,936 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:58,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2021-08-13 02:36:58,937 WARN L235 ceAbstractionStarter]: 125 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:58,937 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 126 thread instances. [2021-08-13 02:36:59,146 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:59,147 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:36:59,147 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:59,147 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:59,147 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:59,147 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:59,147 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:59,147 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:59,147 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:59,147 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:59,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 636 places, 383 transitions, 17146 flow [2021-08-13 02:36:59,473 INFO L129 PetriNetUnfolder]: 0/761 cut-off events. [2021-08-13 02:36:59,473 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:59,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9141 conditions, 761 events. 0/761 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2848 event pairs, 0 based on Foata normal form. 0/634 useless extension candidates. Maximal degree in co-relation 0. Up to 127 conditions per place. [2021-08-13 02:36:59,473 INFO L82 GeneralOperation]: Start removeDead. Operand has 636 places, 383 transitions, 17146 flow [2021-08-13 02:36:59,479 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 634 places, 381 transitions, 17142 flow [2021-08-13 02:36:59,480 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:36:59,480 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:59,480 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:59,480 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:36:59,480 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:59,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:59,481 INFO L82 PathProgramCache]: Analyzing trace with hash 789315, now seen corresponding path program 1 times [2021-08-13 02:36:59,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:59,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628916698] [2021-08-13 02:36:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:59,554 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:59,554 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:59,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:59,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628916698] [2021-08-13 02:36:59,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628916698] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:59,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:59,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:36:59,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330474433] [2021-08-13 02:36:59,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:36:59,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:59,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:36:59,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:36:59,557 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 380 out of 383 [2021-08-13 02:36:59,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 381 transitions, 17142 flow. Second operand has 3 states, 3 states have (on average 380.6666666666667) internal successors, (1142), 3 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:59,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:59,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 380 of 383 [2021-08-13 02:36:59,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:59,788 INFO L129 PetriNetUnfolder]: 0/380 cut-off events. [2021-08-13 02:36:59,788 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:59,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8762 conditions, 380 events. 0/380 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 728 event pairs, 0 based on Foata normal form. 127/507 useless extension candidates. Maximal degree in co-relation 0. Up to 127 conditions per place. [2021-08-13 02:36:59,789 INFO L132 encePairwiseOnDemand]: 381/383 looper letters, 0 selfloop transitions, 1 changer transitions 0/380 dead transitions. [2021-08-13 02:36:59,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 380 transitions, 17142 flow [2021-08-13 02:36:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:36:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:36:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1142 transitions. [2021-08-13 02:36:59,790 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9939077458659704 [2021-08-13 02:36:59,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1142 transitions. [2021-08-13 02:36:59,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1142 transitions. [2021-08-13 02:36:59,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:59,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1142 transitions. [2021-08-13 02:36:59,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 380.6666666666667) internal successors, (1142), 3 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:59,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 383.0) internal successors, (1532), 4 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:59,791 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 383.0) internal successors, (1532), 4 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:59,791 INFO L348 CegarLoopForPetriNet]: 634 programPoint places, 1 predicate places. [2021-08-13 02:36:59,791 INFO L482 AbstractCegarLoop]: Abstraction has has 635 places, 380 transitions, 17142 flow [2021-08-13 02:36:59,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 380.6666666666667) internal successors, (1142), 3 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:59,791 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:59,791 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:59,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2021-08-13 02:36:59,792 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:59,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1240720677, now seen corresponding path program 1 times [2021-08-13 02:36:59,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:59,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463695859] [2021-08-13 02:36:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:59,843 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:59,846 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:00,008 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:00,008 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:00,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2021-08-13 02:37:00,008 WARN L235 ceAbstractionStarter]: 126 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:00,008 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 127 thread instances. [2021-08-13 02:37:00,171 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:00,172 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:00,172 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:00,172 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:00,172 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:00,172 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:00,173 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:00,173 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:00,173 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:00,173 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:00,178 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 641 places, 386 transitions, 17409 flow [2021-08-13 02:37:00,606 INFO L129 PetriNetUnfolder]: 0/767 cut-off events. [2021-08-13 02:37:00,606 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:00,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9277 conditions, 767 events. 0/767 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2975 event pairs, 0 based on Foata normal form. 0/639 useless extension candidates. Maximal degree in co-relation 0. Up to 128 conditions per place. [2021-08-13 02:37:00,606 INFO L82 GeneralOperation]: Start removeDead. Operand has 641 places, 386 transitions, 17409 flow [2021-08-13 02:37:00,612 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 639 places, 384 transitions, 17405 flow [2021-08-13 02:37:00,613 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:00,613 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:00,613 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:00,614 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:00,614 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:00,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:00,614 INFO L82 PathProgramCache]: Analyzing trace with hash 801667, now seen corresponding path program 1 times [2021-08-13 02:37:00,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:00,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531668819] [2021-08-13 02:37:00,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:00,662 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:00,662 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:00,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:00,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531668819] [2021-08-13 02:37:00,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531668819] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:00,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:00,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:00,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331680573] [2021-08-13 02:37:00,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:00,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:00,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:00,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:00,665 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 386 [2021-08-13 02:37:00,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 384 transitions, 17405 flow. Second operand has 3 states, 3 states have (on average 383.6666666666667) internal successors, (1151), 3 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:00,666 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:00,666 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 386 [2021-08-13 02:37:00,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:01,003 INFO L129 PetriNetUnfolder]: 0/383 cut-off events. [2021-08-13 02:37:01,003 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:01,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8895 conditions, 383 events. 0/383 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 739 event pairs, 0 based on Foata normal form. 128/511 useless extension candidates. Maximal degree in co-relation 0. Up to 128 conditions per place. [2021-08-13 02:37:01,004 INFO L132 encePairwiseOnDemand]: 384/386 looper letters, 0 selfloop transitions, 1 changer transitions 0/383 dead transitions. [2021-08-13 02:37:01,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 383 transitions, 17405 flow [2021-08-13 02:37:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1151 transitions. [2021-08-13 02:37:01,005 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9939550949913645 [2021-08-13 02:37:01,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1151 transitions. [2021-08-13 02:37:01,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1151 transitions. [2021-08-13 02:37:01,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:01,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1151 transitions. [2021-08-13 02:37:01,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 383.6666666666667) internal successors, (1151), 3 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:01,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:01,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:01,007 INFO L348 CegarLoopForPetriNet]: 639 programPoint places, 1 predicate places. [2021-08-13 02:37:01,007 INFO L482 AbstractCegarLoop]: Abstraction has has 640 places, 383 transitions, 17405 flow [2021-08-13 02:37:01,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 383.6666666666667) internal successors, (1151), 3 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:01,007 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:01,007 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:01,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2021-08-13 02:37:01,007 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:01,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:01,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1463864931, now seen corresponding path program 1 times [2021-08-13 02:37:01,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:01,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314269981] [2021-08-13 02:37:01,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:01,061 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:01,064 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:01,106 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:01,106 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:01,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2021-08-13 02:37:01,106 WARN L235 ceAbstractionStarter]: 127 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:01,106 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 128 thread instances. [2021-08-13 02:37:01,391 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:01,394 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:01,394 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:01,394 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:01,394 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:01,394 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:01,394 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:01,394 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:01,394 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:01,394 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:01,399 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 646 places, 389 transitions, 17674 flow [2021-08-13 02:37:01,718 INFO L129 PetriNetUnfolder]: 0/773 cut-off events. [2021-08-13 02:37:01,718 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:01,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9414 conditions, 773 events. 0/773 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3015 event pairs, 0 based on Foata normal form. 0/644 useless extension candidates. Maximal degree in co-relation 0. Up to 129 conditions per place. [2021-08-13 02:37:01,719 INFO L82 GeneralOperation]: Start removeDead. Operand has 646 places, 389 transitions, 17674 flow [2021-08-13 02:37:01,725 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 644 places, 387 transitions, 17670 flow [2021-08-13 02:37:01,726 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:01,726 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:01,726 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:01,726 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:01,726 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:01,726 INFO L82 PathProgramCache]: Analyzing trace with hash 814115, now seen corresponding path program 1 times [2021-08-13 02:37:01,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:01,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844557650] [2021-08-13 02:37:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:01,835 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:01,835 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:01,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:01,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844557650] [2021-08-13 02:37:01,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844557650] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:01,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:01,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:01,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951002140] [2021-08-13 02:37:01,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:01,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:01,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:01,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:01,840 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 386 out of 389 [2021-08-13 02:37:01,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 387 transitions, 17670 flow. Second operand has 3 states, 3 states have (on average 386.6666666666667) internal successors, (1160), 3 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:01,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:01,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 386 of 389 [2021-08-13 02:37:01,841 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:02,080 INFO L129 PetriNetUnfolder]: 0/386 cut-off events. [2021-08-13 02:37:02,080 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:02,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9029 conditions, 386 events. 0/386 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 766 event pairs, 0 based on Foata normal form. 129/515 useless extension candidates. Maximal degree in co-relation 0. Up to 129 conditions per place. [2021-08-13 02:37:02,082 INFO L132 encePairwiseOnDemand]: 387/389 looper letters, 0 selfloop transitions, 1 changer transitions 0/386 dead transitions. [2021-08-13 02:37:02,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 386 transitions, 17670 flow [2021-08-13 02:37:02,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:02,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1160 transitions. [2021-08-13 02:37:02,083 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9940017137960583 [2021-08-13 02:37:02,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1160 transitions. [2021-08-13 02:37:02,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1160 transitions. [2021-08-13 02:37:02,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:02,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1160 transitions. [2021-08-13 02:37:02,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 386.6666666666667) internal successors, (1160), 3 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:02,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:02,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:02,085 INFO L348 CegarLoopForPetriNet]: 644 programPoint places, 1 predicate places. [2021-08-13 02:37:02,085 INFO L482 AbstractCegarLoop]: Abstraction has has 645 places, 386 transitions, 17670 flow [2021-08-13 02:37:02,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 386.6666666666667) internal successors, (1160), 3 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:02,085 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:02,085 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:02,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2021-08-13 02:37:02,086 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:02,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:02,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1931559704, now seen corresponding path program 1 times [2021-08-13 02:37:02,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:02,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552763274] [2021-08-13 02:37:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:02,143 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:02,146 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:02,180 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:02,180 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:02,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2021-08-13 02:37:02,180 WARN L235 ceAbstractionStarter]: 128 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:02,181 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 129 thread instances. [2021-08-13 02:37:02,290 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:02,290 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:02,320 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:02,320 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:02,320 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:02,320 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:02,320 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:02,320 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:02,320 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:02,320 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:02,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 651 places, 392 transitions, 17941 flow [2021-08-13 02:37:02,640 INFO L129 PetriNetUnfolder]: 0/779 cut-off events. [2021-08-13 02:37:02,640 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:02,640 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9552 conditions, 779 events. 0/779 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3008 event pairs, 0 based on Foata normal form. 0/649 useless extension candidates. Maximal degree in co-relation 0. Up to 130 conditions per place. [2021-08-13 02:37:02,640 INFO L82 GeneralOperation]: Start removeDead. Operand has 651 places, 392 transitions, 17941 flow [2021-08-13 02:37:02,646 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 649 places, 390 transitions, 17937 flow [2021-08-13 02:37:02,647 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:02,647 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:02,647 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:02,647 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:02,647 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:02,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:02,647 INFO L82 PathProgramCache]: Analyzing trace with hash 826659, now seen corresponding path program 1 times [2021-08-13 02:37:02,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:02,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402660375] [2021-08-13 02:37:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:02,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:02,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:02,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:02,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402660375] [2021-08-13 02:37:02,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402660375] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:02,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:02,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:02,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634474920] [2021-08-13 02:37:02,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:02,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:02,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:02,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:02,695 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 392 [2021-08-13 02:37:02,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 390 transitions, 17937 flow. Second operand has 3 states, 3 states have (on average 389.6666666666667) internal successors, (1169), 3 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:02,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:02,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 392 [2021-08-13 02:37:02,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:03,001 INFO L129 PetriNetUnfolder]: 0/389 cut-off events. [2021-08-13 02:37:03,002 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:03,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9164 conditions, 389 events. 0/389 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 774 event pairs, 0 based on Foata normal form. 130/519 useless extension candidates. Maximal degree in co-relation 0. Up to 130 conditions per place. [2021-08-13 02:37:03,003 INFO L132 encePairwiseOnDemand]: 390/392 looper letters, 0 selfloop transitions, 1 changer transitions 0/389 dead transitions. [2021-08-13 02:37:03,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 389 transitions, 17937 flow [2021-08-13 02:37:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1169 transitions. [2021-08-13 02:37:03,004 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9940476190476191 [2021-08-13 02:37:03,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1169 transitions. [2021-08-13 02:37:03,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1169 transitions. [2021-08-13 02:37:03,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:03,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1169 transitions. [2021-08-13 02:37:03,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 389.6666666666667) internal successors, (1169), 3 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:03,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:03,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:03,005 INFO L348 CegarLoopForPetriNet]: 649 programPoint places, 1 predicate places. [2021-08-13 02:37:03,005 INFO L482 AbstractCegarLoop]: Abstraction has has 650 places, 389 transitions, 17937 flow [2021-08-13 02:37:03,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 389.6666666666667) internal successors, (1169), 3 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:03,005 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:03,005 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:03,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2021-08-13 02:37:03,006 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:03,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:03,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1029630775, now seen corresponding path program 1 times [2021-08-13 02:37:03,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:03,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867536904] [2021-08-13 02:37:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:03,051 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:03,053 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:03,086 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:03,087 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:03,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257 [2021-08-13 02:37:03,087 WARN L235 ceAbstractionStarter]: 129 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:03,087 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 130 thread instances. [2021-08-13 02:37:03,188 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:03,188 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:03,189 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:03,189 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:03,189 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:03,189 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:03,189 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:03,189 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:03,189 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:03,189 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:03,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 656 places, 395 transitions, 18210 flow [2021-08-13 02:37:03,642 INFO L129 PetriNetUnfolder]: 0/785 cut-off events. [2021-08-13 02:37:03,642 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:03,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9691 conditions, 785 events. 0/785 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3092 event pairs, 0 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 0. Up to 131 conditions per place. [2021-08-13 02:37:03,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 656 places, 395 transitions, 18210 flow [2021-08-13 02:37:03,648 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 654 places, 393 transitions, 18206 flow [2021-08-13 02:37:03,649 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:03,649 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:03,649 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:03,649 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:03,649 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:03,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:03,649 INFO L82 PathProgramCache]: Analyzing trace with hash 839299, now seen corresponding path program 1 times [2021-08-13 02:37:03,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:03,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573041915] [2021-08-13 02:37:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:03,708 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:03,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:03,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:03,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573041915] [2021-08-13 02:37:03,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573041915] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:03,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:03,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:03,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509511845] [2021-08-13 02:37:03,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:03,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:03,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:03,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:03,712 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 392 out of 395 [2021-08-13 02:37:03,713 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 393 transitions, 18206 flow. Second operand has 3 states, 3 states have (on average 392.6666666666667) internal successors, (1178), 3 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:03,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:03,713 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 392 of 395 [2021-08-13 02:37:03,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:04,079 INFO L129 PetriNetUnfolder]: 0/392 cut-off events. [2021-08-13 02:37:04,080 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:04,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9300 conditions, 392 events. 0/392 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 803 event pairs, 0 based on Foata normal form. 131/523 useless extension candidates. Maximal degree in co-relation 0. Up to 131 conditions per place. [2021-08-13 02:37:04,081 INFO L132 encePairwiseOnDemand]: 393/395 looper letters, 0 selfloop transitions, 1 changer transitions 0/392 dead transitions. [2021-08-13 02:37:04,081 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 392 transitions, 18206 flow [2021-08-13 02:37:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1178 transitions. [2021-08-13 02:37:04,082 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9940928270042194 [2021-08-13 02:37:04,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1178 transitions. [2021-08-13 02:37:04,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1178 transitions. [2021-08-13 02:37:04,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:04,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1178 transitions. [2021-08-13 02:37:04,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 392.6666666666667) internal successors, (1178), 3 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:04,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:04,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:04,083 INFO L348 CegarLoopForPetriNet]: 654 programPoint places, 1 predicate places. [2021-08-13 02:37:04,083 INFO L482 AbstractCegarLoop]: Abstraction has has 655 places, 392 transitions, 18206 flow [2021-08-13 02:37:04,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 392.6666666666667) internal successors, (1178), 3 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:04,083 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:04,083 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:04,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258 [2021-08-13 02:37:04,084 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:04,084 INFO L82 PathProgramCache]: Analyzing trace with hash -2028284821, now seen corresponding path program 1 times [2021-08-13 02:37:04,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:04,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916987233] [2021-08-13 02:37:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:04,134 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:04,137 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:04,173 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:04,173 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:04,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259 [2021-08-13 02:37:04,173 WARN L235 ceAbstractionStarter]: 130 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:04,173 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 131 thread instances. [2021-08-13 02:37:04,277 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:04,278 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:04,278 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:04,278 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:04,278 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:04,278 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:04,278 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:04,278 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:04,278 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:04,278 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:04,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 661 places, 398 transitions, 18481 flow [2021-08-13 02:37:04,793 INFO L129 PetriNetUnfolder]: 0/791 cut-off events. [2021-08-13 02:37:04,793 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:04,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9831 conditions, 791 events. 0/791 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3086 event pairs, 0 based on Foata normal form. 0/659 useless extension candidates. Maximal degree in co-relation 0. Up to 132 conditions per place. [2021-08-13 02:37:04,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 661 places, 398 transitions, 18481 flow [2021-08-13 02:37:04,799 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 659 places, 396 transitions, 18477 flow [2021-08-13 02:37:04,800 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:04,800 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:04,800 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:04,800 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:04,800 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:04,800 INFO L82 PathProgramCache]: Analyzing trace with hash 852035, now seen corresponding path program 1 times [2021-08-13 02:37:04,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:04,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528950385] [2021-08-13 02:37:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:04,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:04,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:04,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:04,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528950385] [2021-08-13 02:37:04,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528950385] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:04,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:04,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:04,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122205284] [2021-08-13 02:37:04,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:04,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:04,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:04,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:04,850 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 398 [2021-08-13 02:37:04,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 396 transitions, 18477 flow. Second operand has 3 states, 3 states have (on average 395.6666666666667) internal successors, (1187), 3 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:04,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:04,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 398 [2021-08-13 02:37:04,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:05,110 INFO L129 PetriNetUnfolder]: 0/395 cut-off events. [2021-08-13 02:37:05,110 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:05,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9437 conditions, 395 events. 0/395 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 775 event pairs, 0 based on Foata normal form. 132/527 useless extension candidates. Maximal degree in co-relation 0. Up to 132 conditions per place. [2021-08-13 02:37:05,111 INFO L132 encePairwiseOnDemand]: 396/398 looper letters, 0 selfloop transitions, 1 changer transitions 0/395 dead transitions. [2021-08-13 02:37:05,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 395 transitions, 18477 flow [2021-08-13 02:37:05,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1187 transitions. [2021-08-13 02:37:05,112 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9941373534338358 [2021-08-13 02:37:05,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1187 transitions. [2021-08-13 02:37:05,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1187 transitions. [2021-08-13 02:37:05,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:05,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1187 transitions. [2021-08-13 02:37:05,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 395.6666666666667) internal successors, (1187), 3 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:05,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:05,113 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:05,113 INFO L348 CegarLoopForPetriNet]: 659 programPoint places, 1 predicate places. [2021-08-13 02:37:05,113 INFO L482 AbstractCegarLoop]: Abstraction has has 660 places, 395 transitions, 18477 flow [2021-08-13 02:37:05,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 395.6666666666667) internal successors, (1187), 3 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:05,114 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:05,114 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:05,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260 [2021-08-13 02:37:05,114 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:05,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:05,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1854553793, now seen corresponding path program 1 times [2021-08-13 02:37:05,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:05,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244110965] [2021-08-13 02:37:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:05,347 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:05,351 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:05,395 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:05,396 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:05,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261 [2021-08-13 02:37:05,396 WARN L235 ceAbstractionStarter]: 131 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:05,396 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 132 thread instances. [2021-08-13 02:37:05,510 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:05,510 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:05,511 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:05,511 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:05,511 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:05,511 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:05,511 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:05,511 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:05,511 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:05,511 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:05,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 666 places, 401 transitions, 18754 flow [2021-08-13 02:37:06,040 INFO L129 PetriNetUnfolder]: 0/797 cut-off events. [2021-08-13 02:37:06,040 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:06,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9972 conditions, 797 events. 0/797 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3090 event pairs, 0 based on Foata normal form. 0/664 useless extension candidates. Maximal degree in co-relation 0. Up to 133 conditions per place. [2021-08-13 02:37:06,041 INFO L82 GeneralOperation]: Start removeDead. Operand has 666 places, 401 transitions, 18754 flow [2021-08-13 02:37:06,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 664 places, 399 transitions, 18750 flow [2021-08-13 02:37:06,048 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:06,048 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:06,048 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:06,048 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:06,048 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:06,048 INFO L82 PathProgramCache]: Analyzing trace with hash 864867, now seen corresponding path program 1 times [2021-08-13 02:37:06,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:06,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473574516] [2021-08-13 02:37:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:06,109 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:06,109 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:06,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:06,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473574516] [2021-08-13 02:37:06,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473574516] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:06,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:06,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:06,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775980845] [2021-08-13 02:37:06,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:06,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:06,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:06,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:06,113 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 401 [2021-08-13 02:37:06,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 399 transitions, 18750 flow. Second operand has 3 states, 3 states have (on average 398.6666666666667) internal successors, (1196), 3 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:06,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:06,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 401 [2021-08-13 02:37:06,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:06,473 INFO L129 PetriNetUnfolder]: 0/398 cut-off events. [2021-08-13 02:37:06,473 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:06,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9575 conditions, 398 events. 0/398 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 812 event pairs, 0 based on Foata normal form. 133/531 useless extension candidates. Maximal degree in co-relation 0. Up to 133 conditions per place. [2021-08-13 02:37:06,474 INFO L132 encePairwiseOnDemand]: 399/401 looper letters, 0 selfloop transitions, 1 changer transitions 0/398 dead transitions. [2021-08-13 02:37:06,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 398 transitions, 18750 flow [2021-08-13 02:37:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:06,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1196 transitions. [2021-08-13 02:37:06,475 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9941812136325852 [2021-08-13 02:37:06,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1196 transitions. [2021-08-13 02:37:06,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1196 transitions. [2021-08-13 02:37:06,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:06,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1196 transitions. [2021-08-13 02:37:06,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 398.6666666666667) internal successors, (1196), 3 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:06,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:06,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:06,477 INFO L348 CegarLoopForPetriNet]: 664 programPoint places, 1 predicate places. [2021-08-13 02:37:06,477 INFO L482 AbstractCegarLoop]: Abstraction has has 665 places, 398 transitions, 18750 flow [2021-08-13 02:37:06,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 398.6666666666667) internal successors, (1196), 3 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:06,477 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:06,477 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:06,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2021-08-13 02:37:06,477 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:06,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:06,477 INFO L82 PathProgramCache]: Analyzing trace with hash -572446674, now seen corresponding path program 1 times [2021-08-13 02:37:06,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:06,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105514922] [2021-08-13 02:37:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:06,525 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:06,527 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:06,562 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:06,562 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:06,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2021-08-13 02:37:06,563 WARN L235 ceAbstractionStarter]: 132 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:06,563 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 133 thread instances. [2021-08-13 02:37:06,815 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:06,816 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:06,816 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:06,816 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:06,816 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:06,816 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:06,816 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:06,816 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:06,816 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:06,816 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:06,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 671 places, 404 transitions, 19029 flow [2021-08-13 02:37:07,313 INFO L129 PetriNetUnfolder]: 0/803 cut-off events. [2021-08-13 02:37:07,313 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:07,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10114 conditions, 803 events. 0/803 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3142 event pairs, 0 based on Foata normal form. 0/669 useless extension candidates. Maximal degree in co-relation 0. Up to 134 conditions per place. [2021-08-13 02:37:07,313 INFO L82 GeneralOperation]: Start removeDead. Operand has 671 places, 404 transitions, 19029 flow [2021-08-13 02:37:07,319 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 669 places, 402 transitions, 19025 flow [2021-08-13 02:37:07,320 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:07,320 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:07,320 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:07,320 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:07,320 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:07,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:07,321 INFO L82 PathProgramCache]: Analyzing trace with hash 877795, now seen corresponding path program 1 times [2021-08-13 02:37:07,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:07,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267873821] [2021-08-13 02:37:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:07,368 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:07,368 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:07,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:07,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267873821] [2021-08-13 02:37:07,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267873821] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:07,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:07,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:07,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103412253] [2021-08-13 02:37:07,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:07,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:07,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:07,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:07,372 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 401 out of 404 [2021-08-13 02:37:07,373 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 402 transitions, 19025 flow. Second operand has 3 states, 3 states have (on average 401.6666666666667) internal successors, (1205), 3 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:07,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:07,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 401 of 404 [2021-08-13 02:37:07,373 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:07,822 INFO L129 PetriNetUnfolder]: 0/401 cut-off events. [2021-08-13 02:37:07,822 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:07,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9714 conditions, 401 events. 0/401 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 799 event pairs, 0 based on Foata normal form. 134/535 useless extension candidates. Maximal degree in co-relation 0. Up to 134 conditions per place. [2021-08-13 02:37:07,823 INFO L132 encePairwiseOnDemand]: 402/404 looper letters, 0 selfloop transitions, 1 changer transitions 0/401 dead transitions. [2021-08-13 02:37:07,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 401 transitions, 19025 flow [2021-08-13 02:37:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1205 transitions. [2021-08-13 02:37:07,824 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9942244224422442 [2021-08-13 02:37:07,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1205 transitions. [2021-08-13 02:37:07,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1205 transitions. [2021-08-13 02:37:07,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:07,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1205 transitions. [2021-08-13 02:37:07,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 401.6666666666667) internal successors, (1205), 3 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:07,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:07,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:07,827 INFO L348 CegarLoopForPetriNet]: 669 programPoint places, 1 predicate places. [2021-08-13 02:37:07,827 INFO L482 AbstractCegarLoop]: Abstraction has has 670 places, 401 transitions, 19025 flow [2021-08-13 02:37:07,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 401.6666666666667) internal successors, (1205), 3 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:07,827 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:07,827 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:07,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2021-08-13 02:37:07,828 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:07,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:07,828 INFO L82 PathProgramCache]: Analyzing trace with hash 146985733, now seen corresponding path program 1 times [2021-08-13 02:37:07,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:07,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594012368] [2021-08-13 02:37:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:07,897 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:07,899 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:07,939 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:07,939 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:07,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265 [2021-08-13 02:37:07,939 WARN L235 ceAbstractionStarter]: 133 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:07,939 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 134 thread instances. [2021-08-13 02:37:08,060 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:08,061 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:08,062 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:08,062 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:08,062 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:08,062 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:08,062 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:08,062 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:08,062 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:08,062 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:08,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 676 places, 407 transitions, 19306 flow [2021-08-13 02:37:08,593 INFO L129 PetriNetUnfolder]: 0/809 cut-off events. [2021-08-13 02:37:08,593 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:08,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10257 conditions, 809 events. 0/809 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3107 event pairs, 0 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 0. Up to 135 conditions per place. [2021-08-13 02:37:08,593 INFO L82 GeneralOperation]: Start removeDead. Operand has 676 places, 407 transitions, 19306 flow [2021-08-13 02:37:08,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 674 places, 405 transitions, 19302 flow [2021-08-13 02:37:08,600 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:08,600 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:08,600 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:08,600 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:08,600 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:08,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:08,600 INFO L82 PathProgramCache]: Analyzing trace with hash 890819, now seen corresponding path program 1 times [2021-08-13 02:37:08,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:08,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432321514] [2021-08-13 02:37:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:08,643 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:08,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:08,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:08,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432321514] [2021-08-13 02:37:08,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432321514] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:08,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:08,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:08,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943238466] [2021-08-13 02:37:08,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:08,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:08,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:08,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:08,646 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 404 out of 407 [2021-08-13 02:37:08,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 405 transitions, 19302 flow. Second operand has 3 states, 3 states have (on average 404.6666666666667) internal successors, (1214), 3 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:08,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:08,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 404 of 407 [2021-08-13 02:37:08,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:09,099 INFO L129 PetriNetUnfolder]: 0/404 cut-off events. [2021-08-13 02:37:09,099 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:09,099 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9854 conditions, 404 events. 0/404 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 787 event pairs, 0 based on Foata normal form. 135/539 useless extension candidates. Maximal degree in co-relation 0. Up to 135 conditions per place. [2021-08-13 02:37:09,100 INFO L132 encePairwiseOnDemand]: 405/407 looper letters, 0 selfloop transitions, 1 changer transitions 0/404 dead transitions. [2021-08-13 02:37:09,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 404 transitions, 19302 flow [2021-08-13 02:37:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1214 transitions. [2021-08-13 02:37:09,101 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9942669942669943 [2021-08-13 02:37:09,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1214 transitions. [2021-08-13 02:37:09,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1214 transitions. [2021-08-13 02:37:09,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:09,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1214 transitions. [2021-08-13 02:37:09,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 404.6666666666667) internal successors, (1214), 3 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:09,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:09,102 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:09,103 INFO L348 CegarLoopForPetriNet]: 674 programPoint places, 1 predicate places. [2021-08-13 02:37:09,103 INFO L482 AbstractCegarLoop]: Abstraction has has 675 places, 404 transitions, 19302 flow [2021-08-13 02:37:09,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 404.6666666666667) internal successors, (1214), 3 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:09,103 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:09,103 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:09,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266 [2021-08-13 02:37:09,103 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:09,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:09,103 INFO L82 PathProgramCache]: Analyzing trace with hash 461665457, now seen corresponding path program 1 times [2021-08-13 02:37:09,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:09,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424685171] [2021-08-13 02:37:09,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:09,154 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:09,157 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:09,196 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:09,196 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:09,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267 [2021-08-13 02:37:09,197 WARN L235 ceAbstractionStarter]: 134 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:09,197 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 135 thread instances. [2021-08-13 02:37:09,307 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:09,308 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:09,308 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:09,308 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:09,308 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:09,308 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:09,308 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:09,308 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:09,308 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:09,308 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:09,312 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 681 places, 410 transitions, 19585 flow [2021-08-13 02:37:09,825 INFO L129 PetriNetUnfolder]: 0/815 cut-off events. [2021-08-13 02:37:09,825 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:09,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10401 conditions, 815 events. 0/815 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3150 event pairs, 0 based on Foata normal form. 0/679 useless extension candidates. Maximal degree in co-relation 0. Up to 136 conditions per place. [2021-08-13 02:37:09,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 681 places, 410 transitions, 19585 flow [2021-08-13 02:37:09,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 679 places, 408 transitions, 19581 flow [2021-08-13 02:37:09,832 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:09,832 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:09,832 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:09,832 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:09,832 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:09,832 INFO L82 PathProgramCache]: Analyzing trace with hash 903939, now seen corresponding path program 1 times [2021-08-13 02:37:09,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:09,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835843810] [2021-08-13 02:37:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:10,060 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:10,061 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:10,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:10,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835843810] [2021-08-13 02:37:10,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835843810] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:10,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:10,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:10,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424029223] [2021-08-13 02:37:10,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:10,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:10,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:10,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:10,066 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 407 out of 410 [2021-08-13 02:37:10,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 408 transitions, 19581 flow. Second operand has 3 states, 3 states have (on average 407.6666666666667) internal successors, (1223), 3 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:10,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:10,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 407 of 410 [2021-08-13 02:37:10,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:10,420 INFO L129 PetriNetUnfolder]: 0/407 cut-off events. [2021-08-13 02:37:10,420 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:10,420 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9995 conditions, 407 events. 0/407 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 834 event pairs, 0 based on Foata normal form. 136/543 useless extension candidates. Maximal degree in co-relation 0. Up to 136 conditions per place. [2021-08-13 02:37:10,421 INFO L132 encePairwiseOnDemand]: 408/410 looper letters, 0 selfloop transitions, 1 changer transitions 0/407 dead transitions. [2021-08-13 02:37:10,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 407 transitions, 19581 flow [2021-08-13 02:37:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1223 transitions. [2021-08-13 02:37:10,422 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9943089430894309 [2021-08-13 02:37:10,422 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1223 transitions. [2021-08-13 02:37:10,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1223 transitions. [2021-08-13 02:37:10,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:10,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1223 transitions. [2021-08-13 02:37:10,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 407.6666666666667) internal successors, (1223), 3 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:10,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:10,424 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:10,424 INFO L348 CegarLoopForPetriNet]: 679 programPoint places, 1 predicate places. [2021-08-13 02:37:10,424 INFO L482 AbstractCegarLoop]: Abstraction has has 680 places, 407 transitions, 19581 flow [2021-08-13 02:37:10,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 407.6666666666667) internal successors, (1223), 3 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:10,425 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:10,425 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:10,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268 [2021-08-13 02:37:10,425 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:10,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:10,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1283377899, now seen corresponding path program 1 times [2021-08-13 02:37:10,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:10,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009434682] [2021-08-13 02:37:10,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:10,506 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:10,508 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:10,739 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:10,740 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:10,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269 [2021-08-13 02:37:10,740 WARN L235 ceAbstractionStarter]: 135 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:10,740 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 136 thread instances. [2021-08-13 02:37:10,881 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:10,881 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:10,882 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:10,882 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:10,882 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:10,882 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:10,882 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:10,882 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:10,882 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:10,882 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:10,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 686 places, 413 transitions, 19866 flow [2021-08-13 02:37:11,482 INFO L129 PetriNetUnfolder]: 0/821 cut-off events. [2021-08-13 02:37:11,482 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:11,483 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10546 conditions, 821 events. 0/821 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3242 event pairs, 0 based on Foata normal form. 0/684 useless extension candidates. Maximal degree in co-relation 0. Up to 137 conditions per place. [2021-08-13 02:37:11,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 686 places, 413 transitions, 19866 flow [2021-08-13 02:37:11,491 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 684 places, 411 transitions, 19862 flow [2021-08-13 02:37:11,492 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:11,492 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:11,492 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:11,492 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:11,492 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:11,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:11,492 INFO L82 PathProgramCache]: Analyzing trace with hash 917155, now seen corresponding path program 1 times [2021-08-13 02:37:11,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:11,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900564627] [2021-08-13 02:37:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:11,562 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:11,562 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:11,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:11,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900564627] [2021-08-13 02:37:11,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900564627] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:11,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:11,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:11,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690004962] [2021-08-13 02:37:11,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:11,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:11,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:11,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:11,566 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 410 out of 413 [2021-08-13 02:37:11,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 411 transitions, 19862 flow. Second operand has 3 states, 3 states have (on average 410.6666666666667) internal successors, (1232), 3 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:11,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:11,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 410 of 413 [2021-08-13 02:37:11,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:11,848 INFO L129 PetriNetUnfolder]: 0/410 cut-off events. [2021-08-13 02:37:11,848 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:11,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10137 conditions, 410 events. 0/410 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 725 event pairs, 0 based on Foata normal form. 137/547 useless extension candidates. Maximal degree in co-relation 0. Up to 137 conditions per place. [2021-08-13 02:37:11,849 INFO L132 encePairwiseOnDemand]: 411/413 looper letters, 0 selfloop transitions, 1 changer transitions 0/410 dead transitions. [2021-08-13 02:37:11,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 685 places, 410 transitions, 19862 flow [2021-08-13 02:37:11,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1232 transitions. [2021-08-13 02:37:11,850 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9943502824858758 [2021-08-13 02:37:11,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1232 transitions. [2021-08-13 02:37:11,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1232 transitions. [2021-08-13 02:37:11,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:11,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1232 transitions. [2021-08-13 02:37:11,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 410.6666666666667) internal successors, (1232), 3 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:11,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:11,851 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:11,851 INFO L348 CegarLoopForPetriNet]: 684 programPoint places, 1 predicate places. [2021-08-13 02:37:11,851 INFO L482 AbstractCegarLoop]: Abstraction has has 685 places, 410 transitions, 19862 flow [2021-08-13 02:37:11,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 410.6666666666667) internal successors, (1232), 3 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:11,852 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:11,852 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:11,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2021-08-13 02:37:11,852 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:11,852 INFO L82 PathProgramCache]: Analyzing trace with hash -622774668, now seen corresponding path program 1 times [2021-08-13 02:37:11,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:11,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668287451] [2021-08-13 02:37:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:12,101 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:12,103 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:12,144 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:12,144 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:12,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2021-08-13 02:37:12,145 WARN L235 ceAbstractionStarter]: 136 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:12,145 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 137 thread instances. [2021-08-13 02:37:12,265 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:12,265 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:12,265 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:12,265 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:12,265 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:12,265 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:12,265 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:12,265 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:12,266 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:12,266 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:12,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 691 places, 416 transitions, 20149 flow [2021-08-13 02:37:12,885 INFO L129 PetriNetUnfolder]: 0/827 cut-off events. [2021-08-13 02:37:12,885 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:12,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10692 conditions, 827 events. 0/827 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3197 event pairs, 0 based on Foata normal form. 0/689 useless extension candidates. Maximal degree in co-relation 0. Up to 138 conditions per place. [2021-08-13 02:37:12,885 INFO L82 GeneralOperation]: Start removeDead. Operand has 691 places, 416 transitions, 20149 flow [2021-08-13 02:37:12,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 689 places, 414 transitions, 20145 flow [2021-08-13 02:37:12,893 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:12,893 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:12,893 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:12,893 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:12,893 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:12,893 INFO L82 PathProgramCache]: Analyzing trace with hash 930467, now seen corresponding path program 1 times [2021-08-13 02:37:12,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:12,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901520271] [2021-08-13 02:37:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:12,972 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:12,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:12,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:12,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901520271] [2021-08-13 02:37:12,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901520271] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:12,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:12,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:12,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936726885] [2021-08-13 02:37:12,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:12,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:12,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:12,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:12,976 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 413 out of 416 [2021-08-13 02:37:12,977 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 414 transitions, 20145 flow. Second operand has 3 states, 3 states have (on average 413.6666666666667) internal successors, (1241), 3 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:12,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:12,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 413 of 416 [2021-08-13 02:37:12,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:13,550 INFO L129 PetriNetUnfolder]: 0/413 cut-off events. [2021-08-13 02:37:13,550 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:13,550 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10280 conditions, 413 events. 0/413 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 845 event pairs, 0 based on Foata normal form. 138/551 useless extension candidates. Maximal degree in co-relation 0. Up to 138 conditions per place. [2021-08-13 02:37:13,552 INFO L132 encePairwiseOnDemand]: 414/416 looper letters, 0 selfloop transitions, 1 changer transitions 0/413 dead transitions. [2021-08-13 02:37:13,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 413 transitions, 20145 flow [2021-08-13 02:37:13,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:13,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1241 transitions. [2021-08-13 02:37:13,554 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9943910256410257 [2021-08-13 02:37:13,554 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1241 transitions. [2021-08-13 02:37:13,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1241 transitions. [2021-08-13 02:37:13,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:13,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1241 transitions. [2021-08-13 02:37:13,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 413.6666666666667) internal successors, (1241), 3 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:13,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:13,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:13,556 INFO L348 CegarLoopForPetriNet]: 689 programPoint places, 1 predicate places. [2021-08-13 02:37:13,556 INFO L482 AbstractCegarLoop]: Abstraction has has 690 places, 413 transitions, 20145 flow [2021-08-13 02:37:13,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 413.6666666666667) internal successors, (1241), 3 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:13,556 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:13,556 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:13,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272 [2021-08-13 02:37:13,556 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:13,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:13,557 INFO L82 PathProgramCache]: Analyzing trace with hash 947521649, now seen corresponding path program 1 times [2021-08-13 02:37:13,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:13,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66168466] [2021-08-13 02:37:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:13,630 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:13,632 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:13,669 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:13,669 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:13,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273 [2021-08-13 02:37:13,669 WARN L235 ceAbstractionStarter]: 137 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:13,669 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 138 thread instances. [2021-08-13 02:37:13,781 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:13,781 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:13,782 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:13,782 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:13,782 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:13,782 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:13,782 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:13,782 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:13,782 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:13,782 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:13,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 696 places, 419 transitions, 20434 flow [2021-08-13 02:37:14,393 INFO L129 PetriNetUnfolder]: 0/833 cut-off events. [2021-08-13 02:37:14,394 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:14,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10839 conditions, 833 events. 0/833 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3256 event pairs, 0 based on Foata normal form. 0/694 useless extension candidates. Maximal degree in co-relation 0. Up to 139 conditions per place. [2021-08-13 02:37:14,394 INFO L82 GeneralOperation]: Start removeDead. Operand has 696 places, 419 transitions, 20434 flow [2021-08-13 02:37:14,400 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 694 places, 417 transitions, 20430 flow [2021-08-13 02:37:14,401 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:14,401 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:14,401 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:14,401 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:14,401 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:14,401 INFO L82 PathProgramCache]: Analyzing trace with hash 943875, now seen corresponding path program 1 times [2021-08-13 02:37:14,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:14,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275230816] [2021-08-13 02:37:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:14,455 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:14,456 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:14,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:14,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275230816] [2021-08-13 02:37:14,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275230816] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:14,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:14,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:14,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421239747] [2021-08-13 02:37:14,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:14,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:14,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:14,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:14,459 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 416 out of 419 [2021-08-13 02:37:14,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 694 places, 417 transitions, 20430 flow. Second operand has 3 states, 3 states have (on average 416.6666666666667) internal successors, (1250), 3 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:14,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:14,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 416 of 419 [2021-08-13 02:37:14,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:15,001 INFO L129 PetriNetUnfolder]: 0/416 cut-off events. [2021-08-13 02:37:15,002 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:15,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10424 conditions, 416 events. 0/416 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 805 event pairs, 0 based on Foata normal form. 139/555 useless extension candidates. Maximal degree in co-relation 0. Up to 139 conditions per place. [2021-08-13 02:37:15,004 INFO L132 encePairwiseOnDemand]: 417/419 looper letters, 0 selfloop transitions, 1 changer transitions 0/416 dead transitions. [2021-08-13 02:37:15,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 416 transitions, 20430 flow [2021-08-13 02:37:15,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1250 transitions. [2021-08-13 02:37:15,005 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.994431185361973 [2021-08-13 02:37:15,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1250 transitions. [2021-08-13 02:37:15,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1250 transitions. [2021-08-13 02:37:15,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:15,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1250 transitions. [2021-08-13 02:37:15,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 416.6666666666667) internal successors, (1250), 3 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:15,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:15,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:15,007 INFO L348 CegarLoopForPetriNet]: 694 programPoint places, 1 predicate places. [2021-08-13 02:37:15,007 INFO L482 AbstractCegarLoop]: Abstraction has has 695 places, 416 transitions, 20430 flow [2021-08-13 02:37:15,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 416.6666666666667) internal successors, (1250), 3 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:15,007 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:15,007 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:15,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274 [2021-08-13 02:37:15,007 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:15,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:15,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1194481161, now seen corresponding path program 1 times [2021-08-13 02:37:15,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:15,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830742053] [2021-08-13 02:37:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:15,080 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:15,082 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:15,120 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:15,121 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:15,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275 [2021-08-13 02:37:15,121 WARN L235 ceAbstractionStarter]: 138 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:15,121 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 139 thread instances. [2021-08-13 02:37:15,232 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:15,233 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:15,233 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:15,233 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:15,233 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:15,233 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:15,233 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:15,233 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:15,233 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:15,233 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:15,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 701 places, 422 transitions, 20721 flow [2021-08-13 02:37:15,856 INFO L129 PetriNetUnfolder]: 0/839 cut-off events. [2021-08-13 02:37:15,856 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:15,856 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10987 conditions, 839 events. 0/839 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3316 event pairs, 0 based on Foata normal form. 0/699 useless extension candidates. Maximal degree in co-relation 0. Up to 140 conditions per place. [2021-08-13 02:37:15,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 701 places, 422 transitions, 20721 flow [2021-08-13 02:37:15,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 699 places, 420 transitions, 20717 flow [2021-08-13 02:37:15,863 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:15,864 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:15,864 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:15,864 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:15,864 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:15,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:15,864 INFO L82 PathProgramCache]: Analyzing trace with hash 957379, now seen corresponding path program 1 times [2021-08-13 02:37:15,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:15,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866830073] [2021-08-13 02:37:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:15,938 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:15,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:15,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:15,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866830073] [2021-08-13 02:37:15,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866830073] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:15,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:15,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:15,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838050380] [2021-08-13 02:37:15,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:15,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:15,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:15,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:15,943 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 419 out of 422 [2021-08-13 02:37:15,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 699 places, 420 transitions, 20717 flow. Second operand has 3 states, 3 states have (on average 419.6666666666667) internal successors, (1259), 3 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:15,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:15,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 419 of 422 [2021-08-13 02:37:15,943 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:16,485 INFO L129 PetriNetUnfolder]: 0/419 cut-off events. [2021-08-13 02:37:16,485 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:16,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10569 conditions, 419 events. 0/419 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 802 event pairs, 0 based on Foata normal form. 140/559 useless extension candidates. Maximal degree in co-relation 0. Up to 140 conditions per place. [2021-08-13 02:37:16,487 INFO L132 encePairwiseOnDemand]: 420/422 looper letters, 0 selfloop transitions, 1 changer transitions 0/419 dead transitions. [2021-08-13 02:37:16,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 419 transitions, 20717 flow [2021-08-13 02:37:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:16,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:16,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1259 transitions. [2021-08-13 02:37:16,487 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9944707740916272 [2021-08-13 02:37:16,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1259 transitions. [2021-08-13 02:37:16,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1259 transitions. [2021-08-13 02:37:16,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:16,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1259 transitions. [2021-08-13 02:37:16,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 419.6666666666667) internal successors, (1259), 3 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:16,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:16,489 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:16,489 INFO L348 CegarLoopForPetriNet]: 699 programPoint places, 1 predicate places. [2021-08-13 02:37:16,490 INFO L482 AbstractCegarLoop]: Abstraction has has 700 places, 419 transitions, 20717 flow [2021-08-13 02:37:16,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 419.6666666666667) internal successors, (1259), 3 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:16,490 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:16,490 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:16,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276 [2021-08-13 02:37:16,490 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:16,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:16,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1685074073, now seen corresponding path program 1 times [2021-08-13 02:37:16,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:16,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007067576] [2021-08-13 02:37:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:16,571 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:16,573 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:16,611 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:16,611 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:16,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277 [2021-08-13 02:37:16,611 WARN L235 ceAbstractionStarter]: 139 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:16,611 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 140 thread instances. [2021-08-13 02:37:16,724 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:16,724 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:16,725 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:16,725 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:16,725 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:16,725 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:16,725 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:16,725 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:16,725 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:16,725 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:16,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 706 places, 425 transitions, 21010 flow [2021-08-13 02:37:17,332 INFO L129 PetriNetUnfolder]: 0/845 cut-off events. [2021-08-13 02:37:17,332 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:17,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11136 conditions, 845 events. 0/845 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3345 event pairs, 0 based on Foata normal form. 0/704 useless extension candidates. Maximal degree in co-relation 0. Up to 141 conditions per place. [2021-08-13 02:37:17,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 706 places, 425 transitions, 21010 flow [2021-08-13 02:37:17,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 704 places, 423 transitions, 21006 flow [2021-08-13 02:37:17,340 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:17,340 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:17,340 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:17,340 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:17,340 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:17,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:17,341 INFO L82 PathProgramCache]: Analyzing trace with hash 970979, now seen corresponding path program 1 times [2021-08-13 02:37:17,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:17,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945066622] [2021-08-13 02:37:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:17,409 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,409 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:17,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:17,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945066622] [2021-08-13 02:37:17,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945066622] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:17,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:17,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:17,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018285720] [2021-08-13 02:37:17,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:17,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:17,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:17,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:17,412 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 422 out of 425 [2021-08-13 02:37:17,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 423 transitions, 21006 flow. Second operand has 3 states, 3 states have (on average 422.6666666666667) internal successors, (1268), 3 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:17,413 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:17,413 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 422 of 425 [2021-08-13 02:37:17,413 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:17,976 INFO L129 PetriNetUnfolder]: 0/422 cut-off events. [2021-08-13 02:37:17,976 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:17,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10715 conditions, 422 events. 0/422 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 882 event pairs, 0 based on Foata normal form. 141/563 useless extension candidates. Maximal degree in co-relation 0. Up to 141 conditions per place. [2021-08-13 02:37:17,977 INFO L132 encePairwiseOnDemand]: 423/425 looper letters, 0 selfloop transitions, 1 changer transitions 0/422 dead transitions. [2021-08-13 02:37:17,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 422 transitions, 21006 flow [2021-08-13 02:37:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:17,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1268 transitions. [2021-08-13 02:37:17,978 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9945098039215686 [2021-08-13 02:37:17,978 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1268 transitions. [2021-08-13 02:37:17,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1268 transitions. [2021-08-13 02:37:17,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:17,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1268 transitions. [2021-08-13 02:37:17,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 422.6666666666667) internal successors, (1268), 3 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:17,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:17,979 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:17,979 INFO L348 CegarLoopForPetriNet]: 704 programPoint places, 1 predicate places. [2021-08-13 02:37:17,979 INFO L482 AbstractCegarLoop]: Abstraction has has 705 places, 422 transitions, 21006 flow [2021-08-13 02:37:17,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 422.6666666666667) internal successors, (1268), 3 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:17,979 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:17,979 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:17,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278 [2021-08-13 02:37:17,980 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:17,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:17,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1953903686, now seen corresponding path program 1 times [2021-08-13 02:37:17,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:17,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082105355] [2021-08-13 02:37:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:18,044 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:18,047 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:18,087 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:18,087 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:18,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279 [2021-08-13 02:37:18,087 WARN L235 ceAbstractionStarter]: 140 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:18,087 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 141 thread instances. [2021-08-13 02:37:18,202 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:18,203 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:18,203 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:18,203 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:18,203 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:18,203 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:18,203 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:18,203 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:18,203 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:18,203 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:18,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 711 places, 428 transitions, 21301 flow [2021-08-13 02:37:18,873 INFO L129 PetriNetUnfolder]: 0/851 cut-off events. [2021-08-13 02:37:18,873 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:18,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11286 conditions, 851 events. 0/851 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3262 event pairs, 0 based on Foata normal form. 0/709 useless extension candidates. Maximal degree in co-relation 0. Up to 142 conditions per place. [2021-08-13 02:37:18,874 INFO L82 GeneralOperation]: Start removeDead. Operand has 711 places, 428 transitions, 21301 flow [2021-08-13 02:37:18,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 709 places, 426 transitions, 21297 flow [2021-08-13 02:37:18,881 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:18,881 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:18,881 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:18,882 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:18,882 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:18,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:18,882 INFO L82 PathProgramCache]: Analyzing trace with hash 984675, now seen corresponding path program 1 times [2021-08-13 02:37:18,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:18,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482714699] [2021-08-13 02:37:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:18,959 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:18,959 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:18,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:18,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482714699] [2021-08-13 02:37:18,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482714699] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:18,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:18,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:18,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651204574] [2021-08-13 02:37:18,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:18,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:18,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:18,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:18,963 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 425 out of 428 [2021-08-13 02:37:18,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 426 transitions, 21297 flow. Second operand has 3 states, 3 states have (on average 425.6666666666667) internal successors, (1277), 3 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:18,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:18,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 425 of 428 [2021-08-13 02:37:18,963 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:19,487 INFO L129 PetriNetUnfolder]: 0/425 cut-off events. [2021-08-13 02:37:19,487 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:19,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10862 conditions, 425 events. 0/425 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 859 event pairs, 0 based on Foata normal form. 142/567 useless extension candidates. Maximal degree in co-relation 0. Up to 142 conditions per place. [2021-08-13 02:37:19,489 INFO L132 encePairwiseOnDemand]: 426/428 looper letters, 0 selfloop transitions, 1 changer transitions 0/425 dead transitions. [2021-08-13 02:37:19,489 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 425 transitions, 21297 flow [2021-08-13 02:37:19,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:19,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1277 transitions. [2021-08-13 02:37:19,489 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9945482866043613 [2021-08-13 02:37:19,489 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1277 transitions. [2021-08-13 02:37:19,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1277 transitions. [2021-08-13 02:37:19,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:19,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1277 transitions. [2021-08-13 02:37:19,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 425.6666666666667) internal successors, (1277), 3 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:19,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:19,491 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:19,492 INFO L348 CegarLoopForPetriNet]: 709 programPoint places, 1 predicate places. [2021-08-13 02:37:19,492 INFO L482 AbstractCegarLoop]: Abstraction has has 710 places, 425 transitions, 21297 flow [2021-08-13 02:37:19,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 425.6666666666667) internal successors, (1277), 3 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:19,492 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:19,492 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:19,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280 [2021-08-13 02:37:19,492 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:19,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:19,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1556402445, now seen corresponding path program 1 times [2021-08-13 02:37:19,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:19,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831457323] [2021-08-13 02:37:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:19,553 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:19,555 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:19,593 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:19,593 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:19,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281 [2021-08-13 02:37:19,594 WARN L235 ceAbstractionStarter]: 141 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:19,594 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 142 thread instances. [2021-08-13 02:37:19,711 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:19,712 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:19,712 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:19,712 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:19,712 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:19,712 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:19,712 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:19,712 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:19,712 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:19,712 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:19,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 716 places, 431 transitions, 21594 flow [2021-08-13 02:37:20,283 INFO L129 PetriNetUnfolder]: 0/857 cut-off events. [2021-08-13 02:37:20,283 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:20,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11437 conditions, 857 events. 0/857 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3469 event pairs, 0 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 0. Up to 143 conditions per place. [2021-08-13 02:37:20,283 INFO L82 GeneralOperation]: Start removeDead. Operand has 716 places, 431 transitions, 21594 flow [2021-08-13 02:37:20,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 714 places, 429 transitions, 21590 flow [2021-08-13 02:37:20,291 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:20,291 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:20,291 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:20,291 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:20,291 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:20,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:20,291 INFO L82 PathProgramCache]: Analyzing trace with hash 998467, now seen corresponding path program 1 times [2021-08-13 02:37:20,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:20,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392508149] [2021-08-13 02:37:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:20,358 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:20,358 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:20,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:20,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392508149] [2021-08-13 02:37:20,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392508149] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:20,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:20,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:20,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554384995] [2021-08-13 02:37:20,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:20,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:20,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:20,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:20,361 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 428 out of 431 [2021-08-13 02:37:20,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 714 places, 429 transitions, 21590 flow. Second operand has 3 states, 3 states have (on average 428.6666666666667) internal successors, (1286), 3 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:20,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:20,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 428 of 431 [2021-08-13 02:37:20,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:20,912 INFO L129 PetriNetUnfolder]: 0/428 cut-off events. [2021-08-13 02:37:20,912 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:20,912 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11010 conditions, 428 events. 0/428 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 947 event pairs, 0 based on Foata normal form. 143/571 useless extension candidates. Maximal degree in co-relation 0. Up to 143 conditions per place. [2021-08-13 02:37:20,913 INFO L132 encePairwiseOnDemand]: 429/431 looper letters, 0 selfloop transitions, 1 changer transitions 0/428 dead transitions. [2021-08-13 02:37:20,913 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 428 transitions, 21590 flow [2021-08-13 02:37:20,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1286 transitions. [2021-08-13 02:37:20,914 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9945862335653519 [2021-08-13 02:37:20,914 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1286 transitions. [2021-08-13 02:37:20,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1286 transitions. [2021-08-13 02:37:20,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:20,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1286 transitions. [2021-08-13 02:37:20,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 428.6666666666667) internal successors, (1286), 3 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:20,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:20,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:20,916 INFO L348 CegarLoopForPetriNet]: 714 programPoint places, 1 predicate places. [2021-08-13 02:37:20,916 INFO L482 AbstractCegarLoop]: Abstraction has has 715 places, 428 transitions, 21590 flow [2021-08-13 02:37:20,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 428.6666666666667) internal successors, (1286), 3 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:20,916 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:20,916 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:20,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282 [2021-08-13 02:37:20,916 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:20,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:20,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1613715517, now seen corresponding path program 1 times [2021-08-13 02:37:20,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:20,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108909221] [2021-08-13 02:37:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:21,138 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:21,142 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:21,195 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:21,195 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:21,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283 [2021-08-13 02:37:21,195 WARN L235 ceAbstractionStarter]: 142 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:21,195 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 143 thread instances. [2021-08-13 02:37:21,347 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:21,348 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:21,348 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:21,349 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:21,349 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:21,349 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:21,349 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:21,349 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:21,349 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:21,349 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:21,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 721 places, 434 transitions, 21889 flow [2021-08-13 02:37:22,416 INFO L129 PetriNetUnfolder]: 0/863 cut-off events. [2021-08-13 02:37:22,416 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:22,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11589 conditions, 863 events. 0/863 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3364 event pairs, 0 based on Foata normal form. 0/719 useless extension candidates. Maximal degree in co-relation 0. Up to 144 conditions per place. [2021-08-13 02:37:22,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 721 places, 434 transitions, 21889 flow [2021-08-13 02:37:22,426 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 719 places, 432 transitions, 21885 flow [2021-08-13 02:37:22,427 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:22,427 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:22,427 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:22,427 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:22,428 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:22,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1012355, now seen corresponding path program 1 times [2021-08-13 02:37:22,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:22,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587820787] [2021-08-13 02:37:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:22,503 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:22,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:22,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:22,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587820787] [2021-08-13 02:37:22,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587820787] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:22,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:22,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:22,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606458446] [2021-08-13 02:37:22,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:22,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:22,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:22,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:22,507 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 431 out of 434 [2021-08-13 02:37:22,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 432 transitions, 21885 flow. Second operand has 3 states, 3 states have (on average 431.6666666666667) internal successors, (1295), 3 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:22,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:22,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 431 of 434 [2021-08-13 02:37:22,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:22,831 INFO L129 PetriNetUnfolder]: 0/431 cut-off events. [2021-08-13 02:37:22,831 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:22,831 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11159 conditions, 431 events. 0/431 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 865 event pairs, 0 based on Foata normal form. 144/575 useless extension candidates. Maximal degree in co-relation 0. Up to 144 conditions per place. [2021-08-13 02:37:22,832 INFO L132 encePairwiseOnDemand]: 432/434 looper letters, 0 selfloop transitions, 1 changer transitions 0/431 dead transitions. [2021-08-13 02:37:22,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 431 transitions, 21885 flow [2021-08-13 02:37:22,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:22,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1295 transitions. [2021-08-13 02:37:22,833 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9946236559139785 [2021-08-13 02:37:22,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1295 transitions. [2021-08-13 02:37:22,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1295 transitions. [2021-08-13 02:37:22,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:22,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1295 transitions. [2021-08-13 02:37:22,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 431.6666666666667) internal successors, (1295), 3 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:22,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:22,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:22,834 INFO L348 CegarLoopForPetriNet]: 719 programPoint places, 1 predicate places. [2021-08-13 02:37:22,834 INFO L482 AbstractCegarLoop]: Abstraction has has 720 places, 431 transitions, 21885 flow [2021-08-13 02:37:22,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 431.6666666666667) internal successors, (1295), 3 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:22,834 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:22,835 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:22,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284 [2021-08-13 02:37:22,835 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:22,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:22,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1862749517, now seen corresponding path program 1 times [2021-08-13 02:37:22,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:22,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146663156] [2021-08-13 02:37:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:23,153 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:23,156 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:23,207 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:23,207 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:23,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285 [2021-08-13 02:37:23,207 WARN L235 ceAbstractionStarter]: 143 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:23,207 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 144 thread instances. [2021-08-13 02:37:23,325 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:23,326 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:23,326 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:23,326 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:23,326 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:23,326 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:23,326 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:23,326 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:23,326 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:23,326 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:23,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 726 places, 437 transitions, 22186 flow [2021-08-13 02:37:24,020 INFO L129 PetriNetUnfolder]: 0/869 cut-off events. [2021-08-13 02:37:24,021 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:24,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11742 conditions, 869 events. 0/869 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3388 event pairs, 0 based on Foata normal form. 0/724 useless extension candidates. Maximal degree in co-relation 0. Up to 145 conditions per place. [2021-08-13 02:37:24,021 INFO L82 GeneralOperation]: Start removeDead. Operand has 726 places, 437 transitions, 22186 flow [2021-08-13 02:37:24,028 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 724 places, 435 transitions, 22182 flow [2021-08-13 02:37:24,029 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:24,029 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:24,029 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:24,029 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:24,029 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:24,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:24,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1026339, now seen corresponding path program 1 times [2021-08-13 02:37:24,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:24,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363065128] [2021-08-13 02:37:24,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:24,102 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:24,102 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:24,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:24,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363065128] [2021-08-13 02:37:24,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363065128] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:24,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:24,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:24,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477201199] [2021-08-13 02:37:24,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:24,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:24,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:24,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:24,106 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 434 out of 437 [2021-08-13 02:37:24,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 435 transitions, 22182 flow. Second operand has 3 states, 3 states have (on average 434.6666666666667) internal successors, (1304), 3 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:24,107 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:24,107 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 434 of 437 [2021-08-13 02:37:24,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:24,696 INFO L129 PetriNetUnfolder]: 0/434 cut-off events. [2021-08-13 02:37:24,696 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:24,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11309 conditions, 434 events. 0/434 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 887 event pairs, 0 based on Foata normal form. 145/579 useless extension candidates. Maximal degree in co-relation 0. Up to 145 conditions per place. [2021-08-13 02:37:24,698 INFO L132 encePairwiseOnDemand]: 435/437 looper letters, 0 selfloop transitions, 1 changer transitions 0/434 dead transitions. [2021-08-13 02:37:24,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 725 places, 434 transitions, 22182 flow [2021-08-13 02:37:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1304 transitions. [2021-08-13 02:37:24,699 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9946605644546148 [2021-08-13 02:37:24,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1304 transitions. [2021-08-13 02:37:24,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1304 transitions. [2021-08-13 02:37:24,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:24,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1304 transitions. [2021-08-13 02:37:24,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 434.6666666666667) internal successors, (1304), 3 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:24,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:24,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:24,702 INFO L348 CegarLoopForPetriNet]: 724 programPoint places, 1 predicate places. [2021-08-13 02:37:24,702 INFO L482 AbstractCegarLoop]: Abstraction has has 725 places, 434 transitions, 22182 flow [2021-08-13 02:37:24,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 434.6666666666667) internal successors, (1304), 3 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:24,702 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:24,702 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:24,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286 [2021-08-13 02:37:24,703 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:24,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:24,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1105081344, now seen corresponding path program 1 times [2021-08-13 02:37:24,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:24,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173778543] [2021-08-13 02:37:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:24,795 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:24,798 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:24,840 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:24,840 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:24,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287 [2021-08-13 02:37:24,841 WARN L235 ceAbstractionStarter]: 144 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:24,841 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 145 thread instances. [2021-08-13 02:37:24,955 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:24,956 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:24,956 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:24,956 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:24,956 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:24,956 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:24,956 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:24,956 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:24,956 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:24,956 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:24,961 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 731 places, 440 transitions, 22485 flow [2021-08-13 02:37:25,625 INFO L129 PetriNetUnfolder]: 0/875 cut-off events. [2021-08-13 02:37:25,625 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:25,625 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11896 conditions, 875 events. 0/875 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3425 event pairs, 0 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 0. Up to 146 conditions per place. [2021-08-13 02:37:25,625 INFO L82 GeneralOperation]: Start removeDead. Operand has 731 places, 440 transitions, 22485 flow [2021-08-13 02:37:25,632 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 729 places, 438 transitions, 22481 flow [2021-08-13 02:37:25,632 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:25,632 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:25,632 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:25,632 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:25,633 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:25,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1040419, now seen corresponding path program 1 times [2021-08-13 02:37:25,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:25,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684506359] [2021-08-13 02:37:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:25,699 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:25,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:25,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:25,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684506359] [2021-08-13 02:37:25,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684506359] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:25,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:25,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:25,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21826978] [2021-08-13 02:37:25,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:25,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:25,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:25,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:25,703 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 437 out of 440 [2021-08-13 02:37:25,704 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 729 places, 438 transitions, 22481 flow. Second operand has 3 states, 3 states have (on average 437.6666666666667) internal successors, (1313), 3 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:25,704 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:25,704 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 437 of 440 [2021-08-13 02:37:25,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:26,431 INFO L129 PetriNetUnfolder]: 0/437 cut-off events. [2021-08-13 02:37:26,431 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:26,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11460 conditions, 437 events. 0/437 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 895 event pairs, 0 based on Foata normal form. 146/583 useless extension candidates. Maximal degree in co-relation 0. Up to 146 conditions per place. [2021-08-13 02:37:26,433 INFO L132 encePairwiseOnDemand]: 438/440 looper letters, 0 selfloop transitions, 1 changer transitions 0/437 dead transitions. [2021-08-13 02:37:26,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 437 transitions, 22481 flow [2021-08-13 02:37:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:26,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1313 transitions. [2021-08-13 02:37:26,444 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9946969696969697 [2021-08-13 02:37:26,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1313 transitions. [2021-08-13 02:37:26,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1313 transitions. [2021-08-13 02:37:26,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:26,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1313 transitions. [2021-08-13 02:37:26,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 437.6666666666667) internal successors, (1313), 3 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:26,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:26,447 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:26,447 INFO L348 CegarLoopForPetriNet]: 729 programPoint places, 1 predicate places. [2021-08-13 02:37:26,447 INFO L482 AbstractCegarLoop]: Abstraction has has 730 places, 437 transitions, 22481 flow [2021-08-13 02:37:26,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 437.6666666666667) internal successors, (1313), 3 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:26,447 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:26,447 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:26,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288 [2021-08-13 02:37:26,447 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:26,448 INFO L82 PathProgramCache]: Analyzing trace with hash -628799271, now seen corresponding path program 1 times [2021-08-13 02:37:26,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:26,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051362781] [2021-08-13 02:37:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:26,540 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:26,543 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:26,596 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:26,596 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:26,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289 [2021-08-13 02:37:26,596 WARN L235 ceAbstractionStarter]: 145 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:26,596 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 146 thread instances. [2021-08-13 02:37:26,719 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:26,719 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:26,720 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:26,720 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:26,720 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:26,720 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:26,720 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:26,720 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:26,720 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:26,720 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:26,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 736 places, 443 transitions, 22786 flow [2021-08-13 02:37:27,397 INFO L129 PetriNetUnfolder]: 0/881 cut-off events. [2021-08-13 02:37:27,397 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:27,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12051 conditions, 881 events. 0/881 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3499 event pairs, 0 based on Foata normal form. 0/734 useless extension candidates. Maximal degree in co-relation 0. Up to 147 conditions per place. [2021-08-13 02:37:27,397 INFO L82 GeneralOperation]: Start removeDead. Operand has 736 places, 443 transitions, 22786 flow [2021-08-13 02:37:27,404 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 734 places, 441 transitions, 22782 flow [2021-08-13 02:37:27,405 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:27,405 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:27,405 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:27,405 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:27,405 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:27,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:27,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1054595, now seen corresponding path program 1 times [2021-08-13 02:37:27,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:27,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515573300] [2021-08-13 02:37:27,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:27,476 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:27,476 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:27,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:27,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515573300] [2021-08-13 02:37:27,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515573300] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:27,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:27,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:27,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614910110] [2021-08-13 02:37:27,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:27,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:27,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:27,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:27,480 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 440 out of 443 [2021-08-13 02:37:27,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 441 transitions, 22782 flow. Second operand has 3 states, 3 states have (on average 440.6666666666667) internal successors, (1322), 3 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:27,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:27,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 440 of 443 [2021-08-13 02:37:27,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:28,034 INFO L129 PetriNetUnfolder]: 0/440 cut-off events. [2021-08-13 02:37:28,034 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:28,034 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11612 conditions, 440 events. 0/440 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 928 event pairs, 0 based on Foata normal form. 147/587 useless extension candidates. Maximal degree in co-relation 0. Up to 147 conditions per place. [2021-08-13 02:37:28,035 INFO L132 encePairwiseOnDemand]: 441/443 looper letters, 0 selfloop transitions, 1 changer transitions 0/440 dead transitions. [2021-08-13 02:37:28,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 440 transitions, 22782 flow [2021-08-13 02:37:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1322 transitions. [2021-08-13 02:37:28,036 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9947328818660647 [2021-08-13 02:37:28,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1322 transitions. [2021-08-13 02:37:28,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1322 transitions. [2021-08-13 02:37:28,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:28,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1322 transitions. [2021-08-13 02:37:28,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 440.6666666666667) internal successors, (1322), 3 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:28,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:28,038 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:28,038 INFO L348 CegarLoopForPetriNet]: 734 programPoint places, 1 predicate places. [2021-08-13 02:37:28,038 INFO L482 AbstractCegarLoop]: Abstraction has has 735 places, 440 transitions, 22782 flow [2021-08-13 02:37:28,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 440.6666666666667) internal successors, (1322), 3 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:28,038 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:28,038 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:28,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290 [2021-08-13 02:37:28,038 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:28,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:28,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1333894269, now seen corresponding path program 1 times [2021-08-13 02:37:28,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:28,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746920578] [2021-08-13 02:37:28,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:28,096 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:28,098 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:28,139 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:28,139 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:28,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291 [2021-08-13 02:37:28,140 WARN L235 ceAbstractionStarter]: 146 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:28,140 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 147 thread instances. [2021-08-13 02:37:28,255 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:28,256 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:28,256 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:28,256 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:28,256 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:28,256 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:28,256 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:28,256 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:28,256 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:28,256 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:28,262 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 741 places, 446 transitions, 23089 flow [2021-08-13 02:37:28,915 INFO L129 PetriNetUnfolder]: 0/887 cut-off events. [2021-08-13 02:37:28,915 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:28,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12207 conditions, 887 events. 0/887 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3498 event pairs, 0 based on Foata normal form. 0/739 useless extension candidates. Maximal degree in co-relation 0. Up to 148 conditions per place. [2021-08-13 02:37:28,915 INFO L82 GeneralOperation]: Start removeDead. Operand has 741 places, 446 transitions, 23089 flow [2021-08-13 02:37:28,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 739 places, 444 transitions, 23085 flow [2021-08-13 02:37:28,923 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:28,923 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:28,923 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:28,923 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:28,923 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:28,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1068867, now seen corresponding path program 1 times [2021-08-13 02:37:28,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:28,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237953453] [2021-08-13 02:37:28,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:28,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:28,993 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:28,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:28,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237953453] [2021-08-13 02:37:28,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237953453] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:28,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:28,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:28,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864964664] [2021-08-13 02:37:28,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:28,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:28,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:28,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:28,997 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 443 out of 446 [2021-08-13 02:37:28,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 444 transitions, 23085 flow. Second operand has 3 states, 3 states have (on average 443.6666666666667) internal successors, (1331), 3 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:28,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:28,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 443 of 446 [2021-08-13 02:37:28,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:29,601 INFO L129 PetriNetUnfolder]: 0/443 cut-off events. [2021-08-13 02:37:29,601 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:29,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11765 conditions, 443 events. 0/443 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 890 event pairs, 0 based on Foata normal form. 148/591 useless extension candidates. Maximal degree in co-relation 0. Up to 148 conditions per place. [2021-08-13 02:37:29,603 INFO L132 encePairwiseOnDemand]: 444/446 looper letters, 0 selfloop transitions, 1 changer transitions 0/443 dead transitions. [2021-08-13 02:37:29,603 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 443 transitions, 23085 flow [2021-08-13 02:37:29,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:29,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1331 transitions. [2021-08-13 02:37:29,604 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9947683109118086 [2021-08-13 02:37:29,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1331 transitions. [2021-08-13 02:37:29,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1331 transitions. [2021-08-13 02:37:29,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:29,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1331 transitions. [2021-08-13 02:37:29,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 443.6666666666667) internal successors, (1331), 3 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:29,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:29,605 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:29,605 INFO L348 CegarLoopForPetriNet]: 739 programPoint places, 1 predicate places. [2021-08-13 02:37:29,605 INFO L482 AbstractCegarLoop]: Abstraction has has 740 places, 443 transitions, 23085 flow [2021-08-13 02:37:29,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 443.6666666666667) internal successors, (1331), 3 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:29,606 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:29,606 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:29,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292 [2021-08-13 02:37:29,606 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:29,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:29,606 INFO L82 PathProgramCache]: Analyzing trace with hash 333096753, now seen corresponding path program 1 times [2021-08-13 02:37:29,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:29,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012988715] [2021-08-13 02:37:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:29,677 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:29,679 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:29,724 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:29,724 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:29,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293 [2021-08-13 02:37:29,725 WARN L235 ceAbstractionStarter]: 147 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:29,725 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 148 thread instances. [2021-08-13 02:37:29,849 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:29,850 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:29,850 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:29,850 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:29,850 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:29,850 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:29,850 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:29,850 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:29,850 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:29,850 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:29,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 746 places, 449 transitions, 23394 flow [2021-08-13 02:37:30,548 INFO L129 PetriNetUnfolder]: 0/893 cut-off events. [2021-08-13 02:37:30,548 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:30,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12364 conditions, 893 events. 0/893 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3312 event pairs, 0 based on Foata normal form. 0/744 useless extension candidates. Maximal degree in co-relation 0. Up to 149 conditions per place. [2021-08-13 02:37:30,548 INFO L82 GeneralOperation]: Start removeDead. Operand has 746 places, 449 transitions, 23394 flow [2021-08-13 02:37:30,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 744 places, 447 transitions, 23390 flow [2021-08-13 02:37:30,556 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:30,556 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:30,556 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:30,556 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:30,556 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:30,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1083235, now seen corresponding path program 1 times [2021-08-13 02:37:30,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:30,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720612904] [2021-08-13 02:37:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:30,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:30,615 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:30,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:30,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720612904] [2021-08-13 02:37:30,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720612904] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:30,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:30,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:30,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586308595] [2021-08-13 02:37:30,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:30,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:30,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:30,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:30,619 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 446 out of 449 [2021-08-13 02:37:30,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 447 transitions, 23390 flow. Second operand has 3 states, 3 states have (on average 446.6666666666667) internal successors, (1340), 3 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:30,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:30,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 446 of 449 [2021-08-13 02:37:30,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:31,212 INFO L129 PetriNetUnfolder]: 0/446 cut-off events. [2021-08-13 02:37:31,212 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:31,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11919 conditions, 446 events. 0/446 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 825 event pairs, 0 based on Foata normal form. 149/595 useless extension candidates. Maximal degree in co-relation 0. Up to 149 conditions per place. [2021-08-13 02:37:31,213 INFO L132 encePairwiseOnDemand]: 447/449 looper letters, 0 selfloop transitions, 1 changer transitions 0/446 dead transitions. [2021-08-13 02:37:31,214 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 446 transitions, 23390 flow [2021-08-13 02:37:31,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1340 transitions. [2021-08-13 02:37:31,214 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9948032665181886 [2021-08-13 02:37:31,214 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1340 transitions. [2021-08-13 02:37:31,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1340 transitions. [2021-08-13 02:37:31,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:31,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1340 transitions. [2021-08-13 02:37:31,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 446.6666666666667) internal successors, (1340), 3 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:31,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 449.0) internal successors, (1796), 4 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:31,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 449.0) internal successors, (1796), 4 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:31,216 INFO L348 CegarLoopForPetriNet]: 744 programPoint places, 1 predicate places. [2021-08-13 02:37:31,216 INFO L482 AbstractCegarLoop]: Abstraction has has 745 places, 446 transitions, 23390 flow [2021-08-13 02:37:31,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 446.6666666666667) internal successors, (1340), 3 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:31,216 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:31,216 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:31,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294 [2021-08-13 02:37:31,216 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:31,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:31,216 INFO L82 PathProgramCache]: Analyzing trace with hash 361503558, now seen corresponding path program 1 times [2021-08-13 02:37:31,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:31,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416686960] [2021-08-13 02:37:31,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:31,284 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:31,287 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:31,341 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:31,341 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:31,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295 [2021-08-13 02:37:31,341 WARN L235 ceAbstractionStarter]: 148 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:31,341 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 149 thread instances. [2021-08-13 02:37:31,467 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:31,468 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:31,468 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:31,468 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:31,468 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:31,468 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:31,468 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:31,469 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:31,469 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:31,469 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:31,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 751 places, 452 transitions, 23701 flow [2021-08-13 02:37:32,187 INFO L129 PetriNetUnfolder]: 0/899 cut-off events. [2021-08-13 02:37:32,187 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:32,188 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12522 conditions, 899 events. 0/899 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3437 event pairs, 0 based on Foata normal form. 0/749 useless extension candidates. Maximal degree in co-relation 0. Up to 150 conditions per place. [2021-08-13 02:37:32,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 751 places, 452 transitions, 23701 flow [2021-08-13 02:37:32,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 749 places, 450 transitions, 23697 flow [2021-08-13 02:37:32,198 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:32,198 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:32,198 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:32,198 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:32,198 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:32,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:32,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1097699, now seen corresponding path program 1 times [2021-08-13 02:37:32,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:32,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795435119] [2021-08-13 02:37:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:32,275 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:32,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:32,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:32,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795435119] [2021-08-13 02:37:32,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795435119] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:32,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:32,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:32,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955616602] [2021-08-13 02:37:32,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:32,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:32,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:32,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:32,279 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 449 out of 452 [2021-08-13 02:37:32,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 450 transitions, 23697 flow. Second operand has 3 states, 3 states have (on average 449.6666666666667) internal successors, (1349), 3 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:32,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:32,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 449 of 452 [2021-08-13 02:37:32,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:32,916 INFO L129 PetriNetUnfolder]: 0/449 cut-off events. [2021-08-13 02:37:32,917 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:32,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12074 conditions, 449 events. 0/449 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 854 event pairs, 0 based on Foata normal form. 150/599 useless extension candidates. Maximal degree in co-relation 0. Up to 150 conditions per place. [2021-08-13 02:37:32,918 INFO L132 encePairwiseOnDemand]: 450/452 looper letters, 0 selfloop transitions, 1 changer transitions 0/449 dead transitions. [2021-08-13 02:37:32,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 449 transitions, 23697 flow [2021-08-13 02:37:32,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:32,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1349 transitions. [2021-08-13 02:37:32,919 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9948377581120944 [2021-08-13 02:37:32,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1349 transitions. [2021-08-13 02:37:32,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1349 transitions. [2021-08-13 02:37:32,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:32,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1349 transitions. [2021-08-13 02:37:32,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 449.6666666666667) internal successors, (1349), 3 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:32,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:32,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:32,921 INFO L348 CegarLoopForPetriNet]: 749 programPoint places, 1 predicate places. [2021-08-13 02:37:32,921 INFO L482 AbstractCegarLoop]: Abstraction has has 750 places, 449 transitions, 23697 flow [2021-08-13 02:37:32,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 449.6666666666667) internal successors, (1349), 3 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:32,921 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:32,921 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:32,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296 [2021-08-13 02:37:32,921 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:32,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:32,921 INFO L82 PathProgramCache]: Analyzing trace with hash 42044373, now seen corresponding path program 1 times [2021-08-13 02:37:32,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:32,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378739222] [2021-08-13 02:37:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:32,994 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:32,996 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:33,345 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:33,346 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:33,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297 [2021-08-13 02:37:33,346 WARN L235 ceAbstractionStarter]: 149 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:33,346 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 150 thread instances. [2021-08-13 02:37:33,508 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:33,509 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:33,509 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:33,509 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:33,509 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:33,509 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:33,509 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:33,509 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:33,510 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:33,510 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:33,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 756 places, 455 transitions, 24010 flow [2021-08-13 02:37:34,272 INFO L129 PetriNetUnfolder]: 0/905 cut-off events. [2021-08-13 02:37:34,273 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:34,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12681 conditions, 905 events. 0/905 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3553 event pairs, 0 based on Foata normal form. 0/754 useless extension candidates. Maximal degree in co-relation 0. Up to 151 conditions per place. [2021-08-13 02:37:34,273 INFO L82 GeneralOperation]: Start removeDead. Operand has 756 places, 455 transitions, 24010 flow [2021-08-13 02:37:34,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 754 places, 453 transitions, 24006 flow [2021-08-13 02:37:34,294 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:34,294 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:34,295 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:34,295 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:34,295 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:34,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:34,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1112259, now seen corresponding path program 1 times [2021-08-13 02:37:34,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:34,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987462740] [2021-08-13 02:37:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:34,379 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:34,380 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:34,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:34,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987462740] [2021-08-13 02:37:34,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987462740] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:34,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:34,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:34,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771777191] [2021-08-13 02:37:34,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:34,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:34,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:34,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:34,383 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 452 out of 455 [2021-08-13 02:37:34,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 453 transitions, 24006 flow. Second operand has 3 states, 3 states have (on average 452.6666666666667) internal successors, (1358), 3 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:34,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:34,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 452 of 455 [2021-08-13 02:37:34,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:35,023 INFO L129 PetriNetUnfolder]: 0/452 cut-off events. [2021-08-13 02:37:35,023 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:35,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12230 conditions, 452 events. 0/452 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 848 event pairs, 0 based on Foata normal form. 151/603 useless extension candidates. Maximal degree in co-relation 0. Up to 151 conditions per place. [2021-08-13 02:37:35,025 INFO L132 encePairwiseOnDemand]: 453/455 looper letters, 0 selfloop transitions, 1 changer transitions 0/452 dead transitions. [2021-08-13 02:37:35,026 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 452 transitions, 24006 flow [2021-08-13 02:37:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1358 transitions. [2021-08-13 02:37:35,027 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9948717948717949 [2021-08-13 02:37:35,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1358 transitions. [2021-08-13 02:37:35,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1358 transitions. [2021-08-13 02:37:35,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:35,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1358 transitions. [2021-08-13 02:37:35,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 452.6666666666667) internal successors, (1358), 3 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:35,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:35,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:35,049 INFO L348 CegarLoopForPetriNet]: 754 programPoint places, 1 predicate places. [2021-08-13 02:37:35,049 INFO L482 AbstractCegarLoop]: Abstraction has has 755 places, 452 transitions, 24006 flow [2021-08-13 02:37:35,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 452.6666666666667) internal successors, (1358), 3 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:35,049 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:35,050 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:35,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298 [2021-08-13 02:37:35,050 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:35,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:35,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1272205367, now seen corresponding path program 1 times [2021-08-13 02:37:35,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:35,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480386576] [2021-08-13 02:37:35,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:35,134 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:35,137 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:35,186 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:35,186 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:35,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299 [2021-08-13 02:37:35,186 WARN L235 ceAbstractionStarter]: 150 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:35,186 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 151 thread instances. [2021-08-13 02:37:35,305 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:35,306 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:35,306 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:35,306 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:35,306 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:35,306 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:35,306 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:35,306 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:35,306 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:35,306 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:35,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 761 places, 458 transitions, 24321 flow [2021-08-13 02:37:36,063 INFO L129 PetriNetUnfolder]: 0/911 cut-off events. [2021-08-13 02:37:36,064 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:36,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12841 conditions, 911 events. 0/911 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3575 event pairs, 0 based on Foata normal form. 0/759 useless extension candidates. Maximal degree in co-relation 0. Up to 152 conditions per place. [2021-08-13 02:37:36,064 INFO L82 GeneralOperation]: Start removeDead. Operand has 761 places, 458 transitions, 24321 flow [2021-08-13 02:37:36,071 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 759 places, 456 transitions, 24317 flow [2021-08-13 02:37:36,072 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:36,072 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:36,072 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:36,072 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:36,072 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:36,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:36,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1126915, now seen corresponding path program 1 times [2021-08-13 02:37:36,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:36,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115342182] [2021-08-13 02:37:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:36,148 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:36,148 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:36,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:36,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115342182] [2021-08-13 02:37:36,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115342182] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:36,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:36,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:36,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914703049] [2021-08-13 02:37:36,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:36,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:36,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:36,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:36,152 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 455 out of 458 [2021-08-13 02:37:36,152 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 759 places, 456 transitions, 24317 flow. Second operand has 3 states, 3 states have (on average 455.6666666666667) internal successors, (1367), 3 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:36,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:36,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 455 of 458 [2021-08-13 02:37:36,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:36,794 INFO L129 PetriNetUnfolder]: 0/455 cut-off events. [2021-08-13 02:37:36,794 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:36,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12387 conditions, 455 events. 0/455 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 896 event pairs, 0 based on Foata normal form. 152/607 useless extension candidates. Maximal degree in co-relation 0. Up to 152 conditions per place. [2021-08-13 02:37:36,795 INFO L132 encePairwiseOnDemand]: 456/458 looper letters, 0 selfloop transitions, 1 changer transitions 0/455 dead transitions. [2021-08-13 02:37:36,795 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 760 places, 455 transitions, 24317 flow [2021-08-13 02:37:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:36,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:36,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1367 transitions. [2021-08-13 02:37:36,796 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.99490538573508 [2021-08-13 02:37:36,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1367 transitions. [2021-08-13 02:37:36,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1367 transitions. [2021-08-13 02:37:36,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:36,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1367 transitions. [2021-08-13 02:37:36,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 455.6666666666667) internal successors, (1367), 3 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:36,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:36,797 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:36,797 INFO L348 CegarLoopForPetriNet]: 759 programPoint places, 1 predicate places. [2021-08-13 02:37:36,797 INFO L482 AbstractCegarLoop]: Abstraction has has 760 places, 455 transitions, 24317 flow [2021-08-13 02:37:36,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 455.6666666666667) internal successors, (1367), 3 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:36,798 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:36,798 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:36,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300 [2021-08-13 02:37:36,798 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:36,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:36,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1201513915, now seen corresponding path program 1 times [2021-08-13 02:37:36,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:36,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049343536] [2021-08-13 02:37:36,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:36,858 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:36,860 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:36,904 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:36,905 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:36,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301 [2021-08-13 02:37:36,905 WARN L235 ceAbstractionStarter]: 151 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:36,905 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 152 thread instances. [2021-08-13 02:37:37,025 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:37,026 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:37,026 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:37,026 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:37,026 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:37,026 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:37,026 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:37,026 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:37,026 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:37,026 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:37,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 766 places, 461 transitions, 24634 flow [2021-08-13 02:37:37,724 INFO L129 PetriNetUnfolder]: 0/917 cut-off events. [2021-08-13 02:37:37,724 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:37,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13002 conditions, 917 events. 0/917 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3564 event pairs, 0 based on Foata normal form. 0/764 useless extension candidates. Maximal degree in co-relation 0. Up to 153 conditions per place. [2021-08-13 02:37:37,724 INFO L82 GeneralOperation]: Start removeDead. Operand has 766 places, 461 transitions, 24634 flow [2021-08-13 02:37:37,732 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 764 places, 459 transitions, 24630 flow [2021-08-13 02:37:37,732 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:37,732 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:37,732 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:37,733 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:37,733 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:37,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1141667, now seen corresponding path program 1 times [2021-08-13 02:37:37,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:37,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356931467] [2021-08-13 02:37:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:37,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:37,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:37,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:37,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356931467] [2021-08-13 02:37:37,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356931467] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:37,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:37,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:37,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914670270] [2021-08-13 02:37:37,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:37,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:37,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:37,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:37,810 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 458 out of 461 [2021-08-13 02:37:37,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 459 transitions, 24630 flow. Second operand has 3 states, 3 states have (on average 458.6666666666667) internal successors, (1376), 3 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:37,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:37,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 458 of 461 [2021-08-13 02:37:37,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:38,436 INFO L129 PetriNetUnfolder]: 0/458 cut-off events. [2021-08-13 02:37:38,437 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:38,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12545 conditions, 458 events. 0/458 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 869 event pairs, 0 based on Foata normal form. 153/611 useless extension candidates. Maximal degree in co-relation 0. Up to 153 conditions per place. [2021-08-13 02:37:38,438 INFO L132 encePairwiseOnDemand]: 459/461 looper letters, 0 selfloop transitions, 1 changer transitions 0/458 dead transitions. [2021-08-13 02:37:38,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 458 transitions, 24630 flow [2021-08-13 02:37:38,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:38,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1376 transitions. [2021-08-13 02:37:38,439 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9949385394070861 [2021-08-13 02:37:38,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1376 transitions. [2021-08-13 02:37:38,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1376 transitions. [2021-08-13 02:37:38,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:38,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1376 transitions. [2021-08-13 02:37:38,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 458.6666666666667) internal successors, (1376), 3 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:38,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 461.0) internal successors, (1844), 4 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:38,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 461.0) internal successors, (1844), 4 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:38,441 INFO L348 CegarLoopForPetriNet]: 764 programPoint places, 1 predicate places. [2021-08-13 02:37:38,441 INFO L482 AbstractCegarLoop]: Abstraction has has 765 places, 458 transitions, 24630 flow [2021-08-13 02:37:38,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 458.6666666666667) internal successors, (1376), 3 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:38,441 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:38,441 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:38,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302 [2021-08-13 02:37:38,441 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:38,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:38,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1756914292, now seen corresponding path program 1 times [2021-08-13 02:37:38,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:38,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374168392] [2021-08-13 02:37:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:38,518 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:38,520 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:38,565 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:38,566 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:38,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2021-08-13 02:37:38,566 WARN L235 ceAbstractionStarter]: 152 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:38,566 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 153 thread instances. [2021-08-13 02:37:38,686 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:38,687 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:38,687 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:38,687 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:38,687 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:38,687 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:38,687 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:38,687 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:38,687 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:38,687 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:38,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 771 places, 464 transitions, 24949 flow [2021-08-13 02:37:39,409 INFO L129 PetriNetUnfolder]: 0/923 cut-off events. [2021-08-13 02:37:39,409 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:39,410 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13164 conditions, 923 events. 0/923 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3684 event pairs, 0 based on Foata normal form. 0/769 useless extension candidates. Maximal degree in co-relation 0. Up to 154 conditions per place. [2021-08-13 02:37:39,410 INFO L82 GeneralOperation]: Start removeDead. Operand has 771 places, 464 transitions, 24949 flow [2021-08-13 02:37:39,418 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 769 places, 462 transitions, 24945 flow [2021-08-13 02:37:39,418 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:39,419 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:39,419 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:39,419 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:39,419 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:39,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:39,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1156515, now seen corresponding path program 1 times [2021-08-13 02:37:39,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:39,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807436140] [2021-08-13 02:37:39,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:39,717 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:39,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:39,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:39,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807436140] [2021-08-13 02:37:39,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807436140] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:39,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:39,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:39,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915696089] [2021-08-13 02:37:39,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:39,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:39,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:39,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:39,721 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 461 out of 464 [2021-08-13 02:37:39,722 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 462 transitions, 24945 flow. Second operand has 3 states, 3 states have (on average 461.6666666666667) internal successors, (1385), 3 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:39,722 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:39,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 461 of 464 [2021-08-13 02:37:39,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:40,143 INFO L129 PetriNetUnfolder]: 0/461 cut-off events. [2021-08-13 02:37:40,143 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:40,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12704 conditions, 461 events. 0/461 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 881 event pairs, 0 based on Foata normal form. 154/615 useless extension candidates. Maximal degree in co-relation 0. Up to 154 conditions per place. [2021-08-13 02:37:40,145 INFO L132 encePairwiseOnDemand]: 462/464 looper letters, 0 selfloop transitions, 1 changer transitions 0/461 dead transitions. [2021-08-13 02:37:40,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 461 transitions, 24945 flow [2021-08-13 02:37:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:40,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:40,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1385 transitions. [2021-08-13 02:37:40,145 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9949712643678161 [2021-08-13 02:37:40,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1385 transitions. [2021-08-13 02:37:40,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1385 transitions. [2021-08-13 02:37:40,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:40,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1385 transitions. [2021-08-13 02:37:40,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 461.6666666666667) internal successors, (1385), 3 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:40,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:40,147 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:40,147 INFO L348 CegarLoopForPetriNet]: 769 programPoint places, 1 predicate places. [2021-08-13 02:37:40,147 INFO L482 AbstractCegarLoop]: Abstraction has has 770 places, 461 transitions, 24945 flow [2021-08-13 02:37:40,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 461.6666666666667) internal successors, (1385), 3 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:40,147 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:40,147 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:40,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304 [2021-08-13 02:37:40,147 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:40,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:40,148 INFO L82 PathProgramCache]: Analyzing trace with hash 593737217, now seen corresponding path program 1 times [2021-08-13 02:37:40,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:40,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849004996] [2021-08-13 02:37:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:40,601 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:40,633 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:40,686 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:40,687 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:40,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305 [2021-08-13 02:37:40,687 WARN L235 ceAbstractionStarter]: 153 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:40,687 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 154 thread instances. [2021-08-13 02:37:40,873 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:40,874 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:40,874 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:40,875 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:40,875 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:40,875 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:40,875 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:40,875 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:40,875 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:40,875 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:40,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 776 places, 467 transitions, 25266 flow [2021-08-13 02:37:42,010 INFO L129 PetriNetUnfolder]: 0/929 cut-off events. [2021-08-13 02:37:42,010 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:42,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13327 conditions, 929 events. 0/929 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3645 event pairs, 0 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 0. Up to 155 conditions per place. [2021-08-13 02:37:42,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 776 places, 467 transitions, 25266 flow [2021-08-13 02:37:42,022 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 774 places, 465 transitions, 25262 flow [2021-08-13 02:37:42,023 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:42,023 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:42,023 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:42,023 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:42,023 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:42,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:42,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1171459, now seen corresponding path program 1 times [2021-08-13 02:37:42,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:42,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397555879] [2021-08-13 02:37:42,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:42,129 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:42,129 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:42,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:42,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397555879] [2021-08-13 02:37:42,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397555879] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:42,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:42,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:42,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109339996] [2021-08-13 02:37:42,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:42,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:42,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:42,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:42,135 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 464 out of 467 [2021-08-13 02:37:42,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 774 places, 465 transitions, 25262 flow. Second operand has 3 states, 3 states have (on average 464.6666666666667) internal successors, (1394), 3 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:42,135 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:42,135 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 464 of 467 [2021-08-13 02:37:42,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:42,835 INFO L129 PetriNetUnfolder]: 0/464 cut-off events. [2021-08-13 02:37:42,836 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:42,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12864 conditions, 464 events. 0/464 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 155/619 useless extension candidates. Maximal degree in co-relation 0. Up to 155 conditions per place. [2021-08-13 02:37:42,838 INFO L132 encePairwiseOnDemand]: 465/467 looper letters, 0 selfloop transitions, 1 changer transitions 0/464 dead transitions. [2021-08-13 02:37:42,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 775 places, 464 transitions, 25262 flow [2021-08-13 02:37:42,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1394 transitions. [2021-08-13 02:37:42,839 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9950035688793719 [2021-08-13 02:37:42,839 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1394 transitions. [2021-08-13 02:37:42,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1394 transitions. [2021-08-13 02:37:42,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:42,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1394 transitions. [2021-08-13 02:37:42,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 464.6666666666667) internal successors, (1394), 3 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:42,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 467.0) internal successors, (1868), 4 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:42,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 467.0) internal successors, (1868), 4 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:42,841 INFO L348 CegarLoopForPetriNet]: 774 programPoint places, 1 predicate places. [2021-08-13 02:37:42,841 INFO L482 AbstractCegarLoop]: Abstraction has has 775 places, 464 transitions, 25262 flow [2021-08-13 02:37:42,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 464.6666666666667) internal successors, (1394), 3 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:42,841 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:42,841 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:42,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306 [2021-08-13 02:37:42,842 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:42,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:42,842 INFO L82 PathProgramCache]: Analyzing trace with hash 792994063, now seen corresponding path program 1 times [2021-08-13 02:37:42,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:42,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009763587] [2021-08-13 02:37:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:42,934 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:42,938 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:42,997 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:42,997 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:42,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307 [2021-08-13 02:37:42,997 WARN L235 ceAbstractionStarter]: 154 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:42,997 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 155 thread instances. [2021-08-13 02:37:43,132 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:43,133 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:43,133 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:43,133 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:43,133 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:43,133 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:43,133 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:43,133 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:43,133 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:43,133 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:43,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 781 places, 470 transitions, 25585 flow [2021-08-13 02:37:43,943 INFO L129 PetriNetUnfolder]: 0/935 cut-off events. [2021-08-13 02:37:43,944 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:43,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13491 conditions, 935 events. 0/935 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3605 event pairs, 0 based on Foata normal form. 0/779 useless extension candidates. Maximal degree in co-relation 0. Up to 156 conditions per place. [2021-08-13 02:37:43,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 781 places, 470 transitions, 25585 flow [2021-08-13 02:37:43,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 779 places, 468 transitions, 25581 flow [2021-08-13 02:37:43,953 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:43,953 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:43,953 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:43,953 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:43,953 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:43,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1186499, now seen corresponding path program 1 times [2021-08-13 02:37:43,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:43,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692841805] [2021-08-13 02:37:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:44,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:44,032 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:44,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:44,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692841805] [2021-08-13 02:37:44,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692841805] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:44,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:44,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:44,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845586246] [2021-08-13 02:37:44,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:44,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:44,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:44,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:44,036 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 467 out of 470 [2021-08-13 02:37:44,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 779 places, 468 transitions, 25581 flow. Second operand has 3 states, 3 states have (on average 467.6666666666667) internal successors, (1403), 3 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:44,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:44,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 467 of 470 [2021-08-13 02:37:44,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:44,669 INFO L129 PetriNetUnfolder]: 0/467 cut-off events. [2021-08-13 02:37:44,669 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:44,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13025 conditions, 467 events. 0/467 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 945 event pairs, 0 based on Foata normal form. 156/623 useless extension candidates. Maximal degree in co-relation 0. Up to 156 conditions per place. [2021-08-13 02:37:44,671 INFO L132 encePairwiseOnDemand]: 468/470 looper letters, 0 selfloop transitions, 1 changer transitions 0/467 dead transitions. [2021-08-13 02:37:44,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 467 transitions, 25581 flow [2021-08-13 02:37:44,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1403 transitions. [2021-08-13 02:37:44,671 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9950354609929078 [2021-08-13 02:37:44,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1403 transitions. [2021-08-13 02:37:44,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1403 transitions. [2021-08-13 02:37:44,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:44,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1403 transitions. [2021-08-13 02:37:44,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 467.6666666666667) internal successors, (1403), 3 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:44,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:44,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:44,673 INFO L348 CegarLoopForPetriNet]: 779 programPoint places, 1 predicate places. [2021-08-13 02:37:44,673 INFO L482 AbstractCegarLoop]: Abstraction has has 780 places, 467 transitions, 25581 flow [2021-08-13 02:37:44,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 467.6666666666667) internal successors, (1403), 3 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:44,673 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:44,673 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:44,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308 [2021-08-13 02:37:44,674 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:44,674 INFO L82 PathProgramCache]: Analyzing trace with hash 955941513, now seen corresponding path program 1 times [2021-08-13 02:37:44,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:44,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243743722] [2021-08-13 02:37:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:44,736 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:44,739 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:44,787 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:44,787 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:44,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309 [2021-08-13 02:37:44,787 WARN L235 ceAbstractionStarter]: 155 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:44,787 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 156 thread instances. [2021-08-13 02:37:44,913 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:44,913 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:44,914 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:44,914 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:44,914 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:44,914 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:44,914 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:44,914 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:44,914 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:44,914 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:44,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 786 places, 473 transitions, 25906 flow [2021-08-13 02:37:45,659 INFO L129 PetriNetUnfolder]: 0/941 cut-off events. [2021-08-13 02:37:45,660 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:45,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13656 conditions, 941 events. 0/941 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3737 event pairs, 0 based on Foata normal form. 0/784 useless extension candidates. Maximal degree in co-relation 0. Up to 157 conditions per place. [2021-08-13 02:37:45,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 786 places, 473 transitions, 25906 flow [2021-08-13 02:37:45,668 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 784 places, 471 transitions, 25902 flow [2021-08-13 02:37:45,669 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:45,669 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:45,669 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:45,669 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:45,669 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:45,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:45,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1201635, now seen corresponding path program 1 times [2021-08-13 02:37:45,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:45,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671542172] [2021-08-13 02:37:45,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:45,756 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:45,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:45,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:45,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671542172] [2021-08-13 02:37:45,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671542172] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:45,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:45,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:45,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352819431] [2021-08-13 02:37:45,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:45,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:45,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:45,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:45,759 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 470 out of 473 [2021-08-13 02:37:45,760 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 784 places, 471 transitions, 25902 flow. Second operand has 3 states, 3 states have (on average 470.6666666666667) internal successors, (1412), 3 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:45,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:45,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 470 of 473 [2021-08-13 02:37:45,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:46,444 INFO L129 PetriNetUnfolder]: 0/470 cut-off events. [2021-08-13 02:37:46,444 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:46,444 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13187 conditions, 470 events. 0/470 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 881 event pairs, 0 based on Foata normal form. 157/627 useless extension candidates. Maximal degree in co-relation 0. Up to 157 conditions per place. [2021-08-13 02:37:46,446 INFO L132 encePairwiseOnDemand]: 471/473 looper letters, 0 selfloop transitions, 1 changer transitions 0/470 dead transitions. [2021-08-13 02:37:46,446 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 470 transitions, 25902 flow [2021-08-13 02:37:46,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1412 transitions. [2021-08-13 02:37:46,447 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9950669485553206 [2021-08-13 02:37:46,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1412 transitions. [2021-08-13 02:37:46,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1412 transitions. [2021-08-13 02:37:46,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:46,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1412 transitions. [2021-08-13 02:37:46,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 470.6666666666667) internal successors, (1412), 3 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:46,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:46,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:46,448 INFO L348 CegarLoopForPetriNet]: 784 programPoint places, 1 predicate places. [2021-08-13 02:37:46,448 INFO L482 AbstractCegarLoop]: Abstraction has has 785 places, 470 transitions, 25902 flow [2021-08-13 02:37:46,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 470.6666666666667) internal successors, (1412), 3 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:46,448 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:46,449 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:46,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310 [2021-08-13 02:37:46,449 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:46,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:46,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1183893806, now seen corresponding path program 1 times [2021-08-13 02:37:46,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:46,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784269411] [2021-08-13 02:37:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:46,754 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:46,758 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:46,812 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:46,812 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:46,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311 [2021-08-13 02:37:46,812 WARN L235 ceAbstractionStarter]: 156 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:46,812 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 157 thread instances. [2021-08-13 02:37:46,969 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:46,969 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:46,969 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:46,970 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:46,970 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:46,970 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:46,970 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:46,970 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:46,970 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:46,970 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:46,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 791 places, 476 transitions, 26229 flow [2021-08-13 02:37:47,804 INFO L129 PetriNetUnfolder]: 0/947 cut-off events. [2021-08-13 02:37:47,804 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:47,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13822 conditions, 947 events. 0/947 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3601 event pairs, 0 based on Foata normal form. 0/789 useless extension candidates. Maximal degree in co-relation 0. Up to 158 conditions per place. [2021-08-13 02:37:47,804 INFO L82 GeneralOperation]: Start removeDead. Operand has 791 places, 476 transitions, 26229 flow [2021-08-13 02:37:47,812 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 789 places, 474 transitions, 26225 flow [2021-08-13 02:37:47,813 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:47,813 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:47,813 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:47,813 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:47,813 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:47,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:47,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1216867, now seen corresponding path program 1 times [2021-08-13 02:37:47,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:47,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129840388] [2021-08-13 02:37:47,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:47,889 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:47,890 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:47,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:47,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129840388] [2021-08-13 02:37:47,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129840388] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:47,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:47,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:47,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702320470] [2021-08-13 02:37:47,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:47,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:47,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:47,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:47,893 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 476 [2021-08-13 02:37:47,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 789 places, 474 transitions, 26225 flow. Second operand has 3 states, 3 states have (on average 473.6666666666667) internal successors, (1421), 3 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:47,893 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:47,893 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 476 [2021-08-13 02:37:47,893 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:48,595 INFO L129 PetriNetUnfolder]: 0/473 cut-off events. [2021-08-13 02:37:48,595 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:48,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13350 conditions, 473 events. 0/473 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 943 event pairs, 0 based on Foata normal form. 158/631 useless extension candidates. Maximal degree in co-relation 0. Up to 158 conditions per place. [2021-08-13 02:37:48,597 INFO L132 encePairwiseOnDemand]: 474/476 looper letters, 0 selfloop transitions, 1 changer transitions 0/473 dead transitions. [2021-08-13 02:37:48,597 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 790 places, 473 transitions, 26225 flow [2021-08-13 02:37:48,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1421 transitions. [2021-08-13 02:37:48,597 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9950980392156863 [2021-08-13 02:37:48,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1421 transitions. [2021-08-13 02:37:48,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1421 transitions. [2021-08-13 02:37:48,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:48,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1421 transitions. [2021-08-13 02:37:48,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 473.6666666666667) internal successors, (1421), 3 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:48,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:48,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:48,599 INFO L348 CegarLoopForPetriNet]: 789 programPoint places, 1 predicate places. [2021-08-13 02:37:48,599 INFO L482 AbstractCegarLoop]: Abstraction has has 790 places, 473 transitions, 26225 flow [2021-08-13 02:37:48,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 473.6666666666667) internal successors, (1421), 3 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:48,599 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:48,599 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:48,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable312 [2021-08-13 02:37:48,600 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:48,600 INFO L82 PathProgramCache]: Analyzing trace with hash 465167197, now seen corresponding path program 1 times [2021-08-13 02:37:48,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:48,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998321515] [2021-08-13 02:37:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:48,688 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:48,690 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:48,743 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:48,743 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:48,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313 [2021-08-13 02:37:48,744 WARN L235 ceAbstractionStarter]: 157 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:48,744 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 158 thread instances. [2021-08-13 02:37:48,868 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:48,868 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:48,868 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:48,868 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:48,868 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:48,868 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:48,868 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:48,869 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:48,869 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:48,869 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:48,874 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 796 places, 479 transitions, 26554 flow [2021-08-13 02:37:49,655 INFO L129 PetriNetUnfolder]: 0/953 cut-off events. [2021-08-13 02:37:49,655 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:49,655 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13989 conditions, 953 events. 0/953 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3794 event pairs, 0 based on Foata normal form. 0/794 useless extension candidates. Maximal degree in co-relation 0. Up to 159 conditions per place. [2021-08-13 02:37:49,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 796 places, 479 transitions, 26554 flow [2021-08-13 02:37:49,663 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 794 places, 477 transitions, 26550 flow [2021-08-13 02:37:49,664 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:49,664 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:49,664 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:49,664 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:49,664 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:49,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:49,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1232195, now seen corresponding path program 1 times [2021-08-13 02:37:49,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:49,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295132583] [2021-08-13 02:37:49,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:49,752 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:49,752 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:49,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:49,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295132583] [2021-08-13 02:37:49,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295132583] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:49,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:49,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:49,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975483748] [2021-08-13 02:37:49,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:49,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:49,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:49,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:49,756 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 479 [2021-08-13 02:37:49,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 794 places, 477 transitions, 26550 flow. Second operand has 3 states, 3 states have (on average 476.6666666666667) internal successors, (1430), 3 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:49,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:49,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 479 [2021-08-13 02:37:49,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:50,429 INFO L129 PetriNetUnfolder]: 0/476 cut-off events. [2021-08-13 02:37:50,430 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:50,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13514 conditions, 476 events. 0/476 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 878 event pairs, 0 based on Foata normal form. 159/635 useless extension candidates. Maximal degree in co-relation 0. Up to 159 conditions per place. [2021-08-13 02:37:50,431 INFO L132 encePairwiseOnDemand]: 477/479 looper letters, 0 selfloop transitions, 1 changer transitions 0/476 dead transitions. [2021-08-13 02:37:50,431 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 795 places, 476 transitions, 26550 flow [2021-08-13 02:37:50,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1430 transitions. [2021-08-13 02:37:50,432 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9951287404314544 [2021-08-13 02:37:50,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1430 transitions. [2021-08-13 02:37:50,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1430 transitions. [2021-08-13 02:37:50,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:50,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1430 transitions. [2021-08-13 02:37:50,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 476.6666666666667) internal successors, (1430), 3 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:50,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:50,433 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:50,434 INFO L348 CegarLoopForPetriNet]: 794 programPoint places, 1 predicate places. [2021-08-13 02:37:50,434 INFO L482 AbstractCegarLoop]: Abstraction has has 795 places, 476 transitions, 26550 flow [2021-08-13 02:37:50,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 476.6666666666667) internal successors, (1430), 3 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:50,434 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:50,434 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:50,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314 [2021-08-13 02:37:50,434 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:50,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:50,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1836096341, now seen corresponding path program 1 times [2021-08-13 02:37:50,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:50,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938624539] [2021-08-13 02:37:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:50,520 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:50,523 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:50,575 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:50,576 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:50,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315 [2021-08-13 02:37:50,576 WARN L235 ceAbstractionStarter]: 158 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:50,576 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 159 thread instances. [2021-08-13 02:37:50,946 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:50,946 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:50,947 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:50,947 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:50,947 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:50,947 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:50,947 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:50,947 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:50,947 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:50,947 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:50,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 801 places, 482 transitions, 26881 flow [2021-08-13 02:37:51,798 INFO L129 PetriNetUnfolder]: 0/959 cut-off events. [2021-08-13 02:37:51,798 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:51,799 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14157 conditions, 959 events. 0/959 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3698 event pairs, 0 based on Foata normal form. 0/799 useless extension candidates. Maximal degree in co-relation 0. Up to 160 conditions per place. [2021-08-13 02:37:51,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 801 places, 482 transitions, 26881 flow [2021-08-13 02:37:51,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 799 places, 480 transitions, 26877 flow [2021-08-13 02:37:51,808 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:51,809 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:51,809 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:51,809 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:51,809 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:51,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1247619, now seen corresponding path program 1 times [2021-08-13 02:37:51,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:51,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568408167] [2021-08-13 02:37:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:51,902 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:51,902 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:51,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:51,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568408167] [2021-08-13 02:37:51,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568408167] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:51,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:51,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:51,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272881072] [2021-08-13 02:37:51,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:51,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:51,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:51,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:51,906 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 479 out of 482 [2021-08-13 02:37:51,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 799 places, 480 transitions, 26877 flow. Second operand has 3 states, 3 states have (on average 479.6666666666667) internal successors, (1439), 3 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:51,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:51,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 479 of 482 [2021-08-13 02:37:51,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:52,705 INFO L129 PetriNetUnfolder]: 0/479 cut-off events. [2021-08-13 02:37:52,705 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:52,705 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13679 conditions, 479 events. 0/479 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 979 event pairs, 0 based on Foata normal form. 160/639 useless extension candidates. Maximal degree in co-relation 0. Up to 160 conditions per place. [2021-08-13 02:37:52,707 INFO L132 encePairwiseOnDemand]: 480/482 looper letters, 0 selfloop transitions, 1 changer transitions 0/479 dead transitions. [2021-08-13 02:37:52,707 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 800 places, 479 transitions, 26877 flow [2021-08-13 02:37:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1439 transitions. [2021-08-13 02:37:52,707 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9951590594744122 [2021-08-13 02:37:52,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1439 transitions. [2021-08-13 02:37:52,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1439 transitions. [2021-08-13 02:37:52,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:52,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1439 transitions. [2021-08-13 02:37:52,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 479.6666666666667) internal successors, (1439), 3 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:52,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:52,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:52,709 INFO L348 CegarLoopForPetriNet]: 799 programPoint places, 1 predicate places. [2021-08-13 02:37:52,709 INFO L482 AbstractCegarLoop]: Abstraction has has 800 places, 479 transitions, 26877 flow [2021-08-13 02:37:52,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 479.6666666666667) internal successors, (1439), 3 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:52,709 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:52,709 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:52,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316 [2021-08-13 02:37:52,709 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:52,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:52,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1159513091, now seen corresponding path program 1 times [2021-08-13 02:37:52,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:52,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670601721] [2021-08-13 02:37:52,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:52,800 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:52,803 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:52,857 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:52,858 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:52,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317 [2021-08-13 02:37:52,858 WARN L235 ceAbstractionStarter]: 159 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:52,858 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 160 thread instances. [2021-08-13 02:37:52,982 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:52,983 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:52,983 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:52,983 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:52,983 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:52,983 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:52,983 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:52,983 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:52,983 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:52,983 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:52,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 806 places, 485 transitions, 27210 flow [2021-08-13 02:37:53,806 INFO L129 PetriNetUnfolder]: 0/965 cut-off events. [2021-08-13 02:37:53,806 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:53,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14326 conditions, 965 events. 0/965 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3784 event pairs, 0 based on Foata normal form. 0/804 useless extension candidates. Maximal degree in co-relation 0. Up to 161 conditions per place. [2021-08-13 02:37:53,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 806 places, 485 transitions, 27210 flow [2021-08-13 02:37:53,814 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 804 places, 483 transitions, 27206 flow [2021-08-13 02:37:53,815 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:53,815 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:53,815 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:53,815 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:53,815 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:53,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:53,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1263139, now seen corresponding path program 1 times [2021-08-13 02:37:53,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:53,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629002340] [2021-08-13 02:37:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:53,904 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:53,904 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:53,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:53,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629002340] [2021-08-13 02:37:53,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629002340] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:53,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:53,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:53,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109389060] [2021-08-13 02:37:53,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:53,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:53,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:53,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:53,908 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 482 out of 485 [2021-08-13 02:37:53,908 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 804 places, 483 transitions, 27206 flow. Second operand has 3 states, 3 states have (on average 482.6666666666667) internal successors, (1448), 3 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:53,908 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:53,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 482 of 485 [2021-08-13 02:37:53,908 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:54,620 INFO L129 PetriNetUnfolder]: 0/482 cut-off events. [2021-08-13 02:37:54,620 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:54,620 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13845 conditions, 482 events. 0/482 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 868 event pairs, 0 based on Foata normal form. 161/643 useless extension candidates. Maximal degree in co-relation 0. Up to 161 conditions per place. [2021-08-13 02:37:54,622 INFO L132 encePairwiseOnDemand]: 483/485 looper letters, 0 selfloop transitions, 1 changer transitions 0/482 dead transitions. [2021-08-13 02:37:54,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 805 places, 482 transitions, 27206 flow [2021-08-13 02:37:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:54,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1448 transitions. [2021-08-13 02:37:54,623 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9951890034364261 [2021-08-13 02:37:54,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1448 transitions. [2021-08-13 02:37:54,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1448 transitions. [2021-08-13 02:37:54,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:54,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1448 transitions. [2021-08-13 02:37:54,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 482.6666666666667) internal successors, (1448), 3 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:54,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:54,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:54,625 INFO L348 CegarLoopForPetriNet]: 804 programPoint places, 1 predicate places. [2021-08-13 02:37:54,625 INFO L482 AbstractCegarLoop]: Abstraction has has 805 places, 482 transitions, 27206 flow [2021-08-13 02:37:54,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 482.6666666666667) internal successors, (1448), 3 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:54,625 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:54,625 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:54,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318 [2021-08-13 02:37:54,625 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:54,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:54,626 INFO L82 PathProgramCache]: Analyzing trace with hash -256259304, now seen corresponding path program 1 times [2021-08-13 02:37:54,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:54,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512214030] [2021-08-13 02:37:54,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:54,719 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:54,721 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:54,778 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:54,778 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:54,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319 [2021-08-13 02:37:54,778 WARN L235 ceAbstractionStarter]: 160 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:54,778 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 161 thread instances. [2021-08-13 02:37:55,138 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:55,139 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:55,139 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:55,139 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:55,139 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:55,139 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:55,139 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:55,139 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:55,139 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:55,139 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:55,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 811 places, 488 transitions, 27541 flow [2021-08-13 02:37:56,013 INFO L129 PetriNetUnfolder]: 0/971 cut-off events. [2021-08-13 02:37:56,013 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:56,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14496 conditions, 971 events. 0/971 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3643 event pairs, 0 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 0. Up to 162 conditions per place. [2021-08-13 02:37:56,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 811 places, 488 transitions, 27541 flow [2021-08-13 02:37:56,022 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 809 places, 486 transitions, 27537 flow [2021-08-13 02:37:56,022 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:37:56,022 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:56,022 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:56,022 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:56,023 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:56,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:56,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1278755, now seen corresponding path program 1 times [2021-08-13 02:37:56,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:56,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223801026] [2021-08-13 02:37:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:56,100 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:56,100 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:56,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:56,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223801026] [2021-08-13 02:37:56,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223801026] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:56,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:56,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:56,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687432913] [2021-08-13 02:37:56,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:56,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:56,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:56,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:56,103 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 485 out of 488 [2021-08-13 02:37:56,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 809 places, 486 transitions, 27537 flow. Second operand has 3 states, 3 states have (on average 485.6666666666667) internal successors, (1457), 3 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:56,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:56,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 485 of 488 [2021-08-13 02:37:56,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:56,826 INFO L129 PetriNetUnfolder]: 0/485 cut-off events. [2021-08-13 02:37:56,826 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:56,826 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14012 conditions, 485 events. 0/485 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 990 event pairs, 0 based on Foata normal form. 162/647 useless extension candidates. Maximal degree in co-relation 0. Up to 162 conditions per place. [2021-08-13 02:37:56,828 INFO L132 encePairwiseOnDemand]: 486/488 looper letters, 0 selfloop transitions, 1 changer transitions 0/485 dead transitions. [2021-08-13 02:37:56,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 810 places, 485 transitions, 27537 flow [2021-08-13 02:37:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1457 transitions. [2021-08-13 02:37:56,829 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9952185792349727 [2021-08-13 02:37:56,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1457 transitions. [2021-08-13 02:37:56,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1457 transitions. [2021-08-13 02:37:56,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:56,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1457 transitions. [2021-08-13 02:37:56,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 485.6666666666667) internal successors, (1457), 3 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:56,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:56,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:56,832 INFO L348 CegarLoopForPetriNet]: 809 programPoint places, 1 predicate places. [2021-08-13 02:37:56,832 INFO L482 AbstractCegarLoop]: Abstraction has has 810 places, 485 transitions, 27537 flow [2021-08-13 02:37:56,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 485.6666666666667) internal successors, (1457), 3 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:56,832 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:56,832 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:56,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320 [2021-08-13 02:37:56,832 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:56,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:56,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1811296233, now seen corresponding path program 1 times [2021-08-13 02:37:56,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:56,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024490664] [2021-08-13 02:37:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:56,921 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:56,924 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:56,979 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:56,979 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:56,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321 [2021-08-13 02:37:56,979 WARN L235 ceAbstractionStarter]: 161 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:56,979 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 162 thread instances. [2021-08-13 02:37:57,106 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:57,106 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:57,106 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:57,106 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:57,106 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:57,106 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:57,106 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:57,107 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:57,107 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:57,107 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:57,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 816 places, 491 transitions, 27874 flow [2021-08-13 02:37:57,925 INFO L129 PetriNetUnfolder]: 0/977 cut-off events. [2021-08-13 02:37:57,925 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:57,925 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14667 conditions, 977 events. 0/977 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3760 event pairs, 0 based on Foata normal form. 0/814 useless extension candidates. Maximal degree in co-relation 0. Up to 163 conditions per place. [2021-08-13 02:37:57,925 INFO L82 GeneralOperation]: Start removeDead. Operand has 816 places, 491 transitions, 27874 flow [2021-08-13 02:37:57,934 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 814 places, 489 transitions, 27870 flow [2021-08-13 02:37:57,935 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:37:57,935 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:57,935 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:57,935 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:37:57,935 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:57,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:57,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1294467, now seen corresponding path program 1 times [2021-08-13 02:37:57,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:57,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427175916] [2021-08-13 02:37:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:58,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:58,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:37:58,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:58,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427175916] [2021-08-13 02:37:58,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427175916] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:58,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:58,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:37:58,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959295410] [2021-08-13 02:37:58,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:37:58,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:58,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:37:58,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:37:58,038 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 488 out of 491 [2021-08-13 02:37:58,038 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 814 places, 489 transitions, 27870 flow. Second operand has 3 states, 3 states have (on average 488.6666666666667) internal successors, (1466), 3 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:58,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:58,038 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 488 of 491 [2021-08-13 02:37:58,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:58,790 INFO L129 PetriNetUnfolder]: 0/488 cut-off events. [2021-08-13 02:37:58,790 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:58,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14180 conditions, 488 events. 0/488 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 833 event pairs, 0 based on Foata normal form. 163/651 useless extension candidates. Maximal degree in co-relation 0. Up to 163 conditions per place. [2021-08-13 02:37:58,792 INFO L132 encePairwiseOnDemand]: 489/491 looper letters, 0 selfloop transitions, 1 changer transitions 0/488 dead transitions. [2021-08-13 02:37:58,792 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 815 places, 488 transitions, 27870 flow [2021-08-13 02:37:58,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:37:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:37:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1466 transitions. [2021-08-13 02:37:58,793 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9952477936184657 [2021-08-13 02:37:58,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1466 transitions. [2021-08-13 02:37:58,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1466 transitions. [2021-08-13 02:37:58,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:58,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1466 transitions. [2021-08-13 02:37:58,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 488.6666666666667) internal successors, (1466), 3 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:58,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 491.0) internal successors, (1964), 4 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:58,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 491.0) internal successors, (1964), 4 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:58,794 INFO L348 CegarLoopForPetriNet]: 814 programPoint places, 1 predicate places. [2021-08-13 02:37:58,794 INFO L482 AbstractCegarLoop]: Abstraction has has 815 places, 488 transitions, 27870 flow [2021-08-13 02:37:58,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 488.6666666666667) internal successors, (1466), 3 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:37:58,795 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:58,795 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:58,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable322 [2021-08-13 02:37:58,795 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:58,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:58,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1879702885, now seen corresponding path program 1 times [2021-08-13 02:37:58,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:58,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000933112] [2021-08-13 02:37:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:59,234 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:59,237 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:59,305 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:59,305 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:59,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323 [2021-08-13 02:37:59,305 WARN L235 ceAbstractionStarter]: 162 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:59,306 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 163 thread instances. [2021-08-13 02:37:59,462 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:59,462 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:37:59,463 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:59,463 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:59,463 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:59,463 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:59,463 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:59,463 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:59,463 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:59,463 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:59,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 821 places, 494 transitions, 28209 flow [2021-08-13 02:38:00,777 INFO L129 PetriNetUnfolder]: 0/983 cut-off events. [2021-08-13 02:38:00,778 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:00,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14839 conditions, 983 events. 0/983 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3823 event pairs, 0 based on Foata normal form. 0/819 useless extension candidates. Maximal degree in co-relation 0. Up to 164 conditions per place. [2021-08-13 02:38:00,778 INFO L82 GeneralOperation]: Start removeDead. Operand has 821 places, 494 transitions, 28209 flow [2021-08-13 02:38:00,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 819 places, 492 transitions, 28205 flow [2021-08-13 02:38:00,790 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:38:00,790 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:00,791 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:00,791 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:38:00,791 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:00,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:00,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1310275, now seen corresponding path program 1 times [2021-08-13 02:38:00,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:00,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053741560] [2021-08-13 02:38:00,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:38:00,892 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:38:00,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:38:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:38:00,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:38:00,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053741560] [2021-08-13 02:38:00,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053741560] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:38:00,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:38:00,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:38:00,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440799345] [2021-08-13 02:38:00,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:38:00,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:38:00,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:38:00,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:38:00,896 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 494 [2021-08-13 02:38:00,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 819 places, 492 transitions, 28205 flow. Second operand has 3 states, 3 states have (on average 491.6666666666667) internal successors, (1475), 3 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:00,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:38:00,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 494 [2021-08-13 02:38:00,897 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:38:01,643 INFO L129 PetriNetUnfolder]: 0/491 cut-off events. [2021-08-13 02:38:01,643 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:01,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14349 conditions, 491 events. 0/491 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 990 event pairs, 0 based on Foata normal form. 164/655 useless extension candidates. Maximal degree in co-relation 0. Up to 164 conditions per place. [2021-08-13 02:38:01,645 INFO L132 encePairwiseOnDemand]: 492/494 looper letters, 0 selfloop transitions, 1 changer transitions 0/491 dead transitions. [2021-08-13 02:38:01,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 491 transitions, 28205 flow [2021-08-13 02:38:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:38:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:38:01,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1475 transitions. [2021-08-13 02:38:01,646 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.99527665317139 [2021-08-13 02:38:01,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1475 transitions. [2021-08-13 02:38:01,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1475 transitions. [2021-08-13 02:38:01,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:38:01,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1475 transitions. [2021-08-13 02:38:01,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 491.6666666666667) internal successors, (1475), 3 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:01,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:01,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:01,648 INFO L348 CegarLoopForPetriNet]: 819 programPoint places, 1 predicate places. [2021-08-13 02:38:01,648 INFO L482 AbstractCegarLoop]: Abstraction has has 820 places, 491 transitions, 28205 flow [2021-08-13 02:38:01,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 491.6666666666667) internal successors, (1475), 3 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:01,648 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:01,649 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:38:01,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324 [2021-08-13 02:38:01,649 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:01,649 INFO L82 PathProgramCache]: Analyzing trace with hash -29318495, now seen corresponding path program 1 times [2021-08-13 02:38:01,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:01,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257436739] [2021-08-13 02:38:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:01,733 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:01,735 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:01,804 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:38:01,804 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:38:01,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325 [2021-08-13 02:38:01,804 WARN L235 ceAbstractionStarter]: 163 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:38:01,804 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 164 thread instances. [2021-08-13 02:38:01,938 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:38:01,939 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:38:01,939 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:38:01,939 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:38:01,939 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:38:01,939 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:38:01,939 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:38:01,939 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:38:01,939 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:38:01,939 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:38:01,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 826 places, 497 transitions, 28546 flow [2021-08-13 02:38:02,737 INFO L129 PetriNetUnfolder]: 0/989 cut-off events. [2021-08-13 02:38:02,737 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:02,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15012 conditions, 989 events. 0/989 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3881 event pairs, 0 based on Foata normal form. 0/824 useless extension candidates. Maximal degree in co-relation 0. Up to 165 conditions per place. [2021-08-13 02:38:02,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 826 places, 497 transitions, 28546 flow [2021-08-13 02:38:02,745 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 824 places, 495 transitions, 28542 flow [2021-08-13 02:38:02,746 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:38:02,746 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:02,746 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:02,746 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:38:02,746 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:02,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:02,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1326179, now seen corresponding path program 1 times [2021-08-13 02:38:02,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:02,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989399279] [2021-08-13 02:38:02,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:38:03,039 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:38:03,040 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:38:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:38:03,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:38:03,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989399279] [2021-08-13 02:38:03,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989399279] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:38:03,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:38:03,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:38:03,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967185702] [2021-08-13 02:38:03,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:38:03,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:38:03,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:38:03,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:38:03,044 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 497 [2021-08-13 02:38:03,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 495 transitions, 28542 flow. Second operand has 3 states, 3 states have (on average 494.6666666666667) internal successors, (1484), 3 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:03,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:38:03,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 497 [2021-08-13 02:38:03,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:38:03,533 INFO L129 PetriNetUnfolder]: 0/494 cut-off events. [2021-08-13 02:38:03,533 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:03,533 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14519 conditions, 494 events. 0/494 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 885 event pairs, 0 based on Foata normal form. 165/659 useless extension candidates. Maximal degree in co-relation 0. Up to 165 conditions per place. [2021-08-13 02:38:03,535 INFO L132 encePairwiseOnDemand]: 495/497 looper letters, 0 selfloop transitions, 1 changer transitions 0/494 dead transitions. [2021-08-13 02:38:03,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 494 transitions, 28542 flow [2021-08-13 02:38:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:38:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:38:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1484 transitions. [2021-08-13 02:38:03,777 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9953051643192489 [2021-08-13 02:38:03,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1484 transitions. [2021-08-13 02:38:03,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1484 transitions. [2021-08-13 02:38:03,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:38:03,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1484 transitions. [2021-08-13 02:38:03,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 494.6666666666667) internal successors, (1484), 3 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:03,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 497.0) internal successors, (1988), 4 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:03,780 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 497.0) internal successors, (1988), 4 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:03,780 INFO L348 CegarLoopForPetriNet]: 824 programPoint places, 1 predicate places. [2021-08-13 02:38:03,780 INFO L482 AbstractCegarLoop]: Abstraction has has 825 places, 494 transitions, 28542 flow [2021-08-13 02:38:03,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 494.6666666666667) internal successors, (1484), 3 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:03,780 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:03,780 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:38:03,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326 [2021-08-13 02:38:03,780 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:03,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:03,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1099284898, now seen corresponding path program 1 times [2021-08-13 02:38:03,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:03,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435836924] [2021-08-13 02:38:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:03,885 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:03,889 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:03,946 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:38:03,947 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:38:03,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327 [2021-08-13 02:38:03,947 WARN L235 ceAbstractionStarter]: 164 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:38:03,947 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 165 thread instances. [2021-08-13 02:38:04,076 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:38:04,077 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:38:04,077 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:38:04,077 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:38:04,077 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:38:04,077 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:38:04,077 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:38:04,077 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:38:04,077 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:38:04,077 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:38:04,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 831 places, 500 transitions, 28885 flow [2021-08-13 02:38:04,915 INFO L129 PetriNetUnfolder]: 0/995 cut-off events. [2021-08-13 02:38:04,916 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:04,916 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15186 conditions, 995 events. 0/995 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3872 event pairs, 0 based on Foata normal form. 0/829 useless extension candidates. Maximal degree in co-relation 0. Up to 166 conditions per place. [2021-08-13 02:38:04,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 831 places, 500 transitions, 28885 flow [2021-08-13 02:38:04,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 829 places, 498 transitions, 28881 flow [2021-08-13 02:38:04,925 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:38:04,925 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:04,925 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:04,925 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:38:04,925 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:04,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1342179, now seen corresponding path program 1 times [2021-08-13 02:38:04,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:04,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000387322] [2021-08-13 02:38:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:38:05,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:38:05,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:38:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:38:05,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:38:05,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000387322] [2021-08-13 02:38:05,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000387322] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:38:05,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:38:05,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:38:05,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413476826] [2021-08-13 02:38:05,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:38:05,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:38:05,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:38:05,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:38:05,012 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 500 [2021-08-13 02:38:05,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 498 transitions, 28881 flow. Second operand has 3 states, 3 states have (on average 497.6666666666667) internal successors, (1493), 3 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:05,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:38:05,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 500 [2021-08-13 02:38:05,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:38:05,649 INFO L129 PetriNetUnfolder]: 0/497 cut-off events. [2021-08-13 02:38:05,649 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:05,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14690 conditions, 497 events. 0/497 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 963 event pairs, 0 based on Foata normal form. 166/663 useless extension candidates. Maximal degree in co-relation 0. Up to 166 conditions per place. [2021-08-13 02:38:05,651 INFO L132 encePairwiseOnDemand]: 498/500 looper letters, 0 selfloop transitions, 1 changer transitions 0/497 dead transitions. [2021-08-13 02:38:05,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 830 places, 497 transitions, 28881 flow [2021-08-13 02:38:05,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:38:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:38:05,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1493 transitions. [2021-08-13 02:38:05,652 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9953333333333333 [2021-08-13 02:38:05,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1493 transitions. [2021-08-13 02:38:05,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1493 transitions. [2021-08-13 02:38:05,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:38:05,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1493 transitions. [2021-08-13 02:38:05,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 497.6666666666667) internal successors, (1493), 3 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:05,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:05,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:05,653 INFO L348 CegarLoopForPetriNet]: 829 programPoint places, 1 predicate places. [2021-08-13 02:38:05,653 INFO L482 AbstractCegarLoop]: Abstraction has has 830 places, 497 transitions, 28881 flow [2021-08-13 02:38:05,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 497.6666666666667) internal successors, (1493), 3 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:05,654 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:05,654 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:38:05,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328 [2021-08-13 02:38:05,654 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:05,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:05,654 INFO L82 PathProgramCache]: Analyzing trace with hash -932268123, now seen corresponding path program 1 times [2021-08-13 02:38:05,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:05,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449805590] [2021-08-13 02:38:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:05,736 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:05,739 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:05,797 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:38:05,797 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:38:05,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329 [2021-08-13 02:38:05,797 WARN L235 ceAbstractionStarter]: 165 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:38:05,797 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 166 thread instances. [2021-08-13 02:38:06,148 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:38:06,148 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:38:06,149 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:38:06,149 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:38:06,149 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:38:06,149 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:38:06,149 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:38:06,149 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:38:06,149 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:38:06,149 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:38:06,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 836 places, 503 transitions, 29226 flow [2021-08-13 02:38:06,984 INFO L129 PetriNetUnfolder]: 0/1001 cut-off events. [2021-08-13 02:38:06,984 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:06,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15361 conditions, 1001 events. 0/1001 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3796 event pairs, 0 based on Foata normal form. 0/834 useless extension candidates. Maximal degree in co-relation 0. Up to 167 conditions per place. [2021-08-13 02:38:06,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 836 places, 503 transitions, 29226 flow [2021-08-13 02:38:06,993 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 834 places, 501 transitions, 29222 flow [2021-08-13 02:38:06,994 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:38:06,994 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:06,994 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:06,994 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:38:06,994 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:06,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:06,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1358275, now seen corresponding path program 1 times [2021-08-13 02:38:06,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:06,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177752750] [2021-08-13 02:38:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:38:07,092 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:38:07,093 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:38:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:38:07,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:38:07,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177752750] [2021-08-13 02:38:07,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177752750] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:38:07,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:38:07,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:38:07,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065489756] [2021-08-13 02:38:07,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:38:07,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:38:07,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:38:07,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:38:07,097 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 503 [2021-08-13 02:38:07,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 834 places, 501 transitions, 29222 flow. Second operand has 3 states, 3 states have (on average 500.6666666666667) internal successors, (1502), 3 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:07,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:38:07,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 503 [2021-08-13 02:38:07,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:38:07,809 INFO L129 PetriNetUnfolder]: 0/500 cut-off events. [2021-08-13 02:38:07,809 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:07,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14862 conditions, 500 events. 0/500 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1032 event pairs, 0 based on Foata normal form. 167/667 useless extension candidates. Maximal degree in co-relation 0. Up to 167 conditions per place. [2021-08-13 02:38:07,810 INFO L132 encePairwiseOnDemand]: 501/503 looper letters, 0 selfloop transitions, 1 changer transitions 0/500 dead transitions. [2021-08-13 02:38:07,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 500 transitions, 29222 flow [2021-08-13 02:38:07,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:38:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:38:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1502 transitions. [2021-08-13 02:38:07,811 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9953611663353215 [2021-08-13 02:38:07,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1502 transitions. [2021-08-13 02:38:07,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1502 transitions. [2021-08-13 02:38:07,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:38:07,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1502 transitions. [2021-08-13 02:38:07,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 500.6666666666667) internal successors, (1502), 3 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:07,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:07,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:07,813 INFO L348 CegarLoopForPetriNet]: 834 programPoint places, 1 predicate places. [2021-08-13 02:38:07,813 INFO L482 AbstractCegarLoop]: Abstraction has has 835 places, 500 transitions, 29222 flow [2021-08-13 02:38:07,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 500.6666666666667) internal successors, (1502), 3 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:07,813 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:07,813 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:38:07,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330 [2021-08-13 02:38:07,813 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:07,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1538603745, now seen corresponding path program 1 times [2021-08-13 02:38:07,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:07,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263482854] [2021-08-13 02:38:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:07,895 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:07,897 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:07,956 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:38:07,956 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:38:07,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331 [2021-08-13 02:38:07,956 WARN L235 ceAbstractionStarter]: 166 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:38:07,956 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 167 thread instances. [2021-08-13 02:38:08,086 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:38:08,086 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:38:08,087 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:38:08,087 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:38:08,087 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:38:08,087 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:38:08,087 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:38:08,087 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:38:08,087 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:38:08,087 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:38:08,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 841 places, 506 transitions, 29569 flow [2021-08-13 02:38:08,897 INFO L129 PetriNetUnfolder]: 0/1007 cut-off events. [2021-08-13 02:38:08,897 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:08,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15537 conditions, 1007 events. 0/1007 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4026 event pairs, 0 based on Foata normal form. 0/839 useless extension candidates. Maximal degree in co-relation 0. Up to 168 conditions per place. [2021-08-13 02:38:08,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 841 places, 506 transitions, 29569 flow [2021-08-13 02:38:08,906 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 839 places, 504 transitions, 29565 flow [2021-08-13 02:38:08,907 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:38:08,907 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:08,907 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:08,907 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:38:08,907 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:08,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:08,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1374467, now seen corresponding path program 1 times [2021-08-13 02:38:08,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:08,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868165415] [2021-08-13 02:38:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:38:09,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:38:09,244 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:38:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:38:09,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:38:09,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868165415] [2021-08-13 02:38:09,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868165415] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:38:09,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:38:09,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:38:09,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355881654] [2021-08-13 02:38:09,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:38:09,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:38:09,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:38:09,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:38:09,250 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 503 out of 506 [2021-08-13 02:38:09,250 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 839 places, 504 transitions, 29565 flow. Second operand has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:09,250 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:38:09,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 503 of 506 [2021-08-13 02:38:09,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:38:10,025 INFO L129 PetriNetUnfolder]: 0/503 cut-off events. [2021-08-13 02:38:10,025 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:10,025 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15035 conditions, 503 events. 0/503 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 986 event pairs, 0 based on Foata normal form. 168/671 useless extension candidates. Maximal degree in co-relation 0. Up to 168 conditions per place. [2021-08-13 02:38:10,028 INFO L132 encePairwiseOnDemand]: 504/506 looper letters, 0 selfloop transitions, 1 changer transitions 0/503 dead transitions. [2021-08-13 02:38:10,028 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 840 places, 503 transitions, 29565 flow [2021-08-13 02:38:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:38:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:38:10,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1511 transitions. [2021-08-13 02:38:10,029 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9953886693017128 [2021-08-13 02:38:10,029 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1511 transitions. [2021-08-13 02:38:10,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1511 transitions. [2021-08-13 02:38:10,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:38:10,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1511 transitions. [2021-08-13 02:38:10,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:10,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:10,031 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:10,031 INFO L348 CegarLoopForPetriNet]: 839 programPoint places, 1 predicate places. [2021-08-13 02:38:10,031 INFO L482 AbstractCegarLoop]: Abstraction has has 840 places, 503 transitions, 29565 flow [2021-08-13 02:38:10,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:10,031 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:10,032 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:38:10,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332 [2021-08-13 02:38:10,032 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:10,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:10,032 INFO L82 PathProgramCache]: Analyzing trace with hash 807064181, now seen corresponding path program 1 times [2021-08-13 02:38:10,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:10,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823724876] [2021-08-13 02:38:10,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:10,131 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:10,134 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:10,192 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:38:10,192 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:38:10,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333 [2021-08-13 02:38:10,193 WARN L235 ceAbstractionStarter]: 167 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:38:10,193 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 168 thread instances. [2021-08-13 02:38:10,323 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:38:10,324 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:38:10,324 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:38:10,324 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:38:10,324 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:38:10,324 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:38:10,324 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:38:10,324 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:38:10,324 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:38:10,324 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:38:10,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 846 places, 509 transitions, 29914 flow [2021-08-13 02:38:11,161 INFO L129 PetriNetUnfolder]: 0/1013 cut-off events. [2021-08-13 02:38:11,161 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:11,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15714 conditions, 1013 events. 0/1013 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4032 event pairs, 0 based on Foata normal form. 0/844 useless extension candidates. Maximal degree in co-relation 0. Up to 169 conditions per place. [2021-08-13 02:38:11,162 INFO L82 GeneralOperation]: Start removeDead. Operand has 846 places, 509 transitions, 29914 flow [2021-08-13 02:38:11,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 844 places, 507 transitions, 29910 flow [2021-08-13 02:38:11,171 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:38:11,171 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:11,171 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:11,171 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:38:11,171 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:11,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:11,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1390755, now seen corresponding path program 1 times [2021-08-13 02:38:11,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:11,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58453688] [2021-08-13 02:38:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:38:11,252 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:38:11,252 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:38:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:38:11,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:38:11,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58453688] [2021-08-13 02:38:11,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58453688] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:38:11,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:38:11,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:38:11,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680612478] [2021-08-13 02:38:11,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:38:11,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:38:11,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:38:11,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:38:11,256 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 506 out of 509 [2021-08-13 02:38:11,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 844 places, 507 transitions, 29910 flow. Second operand has 3 states, 3 states have (on average 506.6666666666667) internal successors, (1520), 3 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:11,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:38:11,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 506 of 509 [2021-08-13 02:38:11,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:38:11,965 INFO L129 PetriNetUnfolder]: 0/506 cut-off events. [2021-08-13 02:38:11,965 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:11,965 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15209 conditions, 506 events. 0/506 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1023 event pairs, 0 based on Foata normal form. 169/675 useless extension candidates. Maximal degree in co-relation 0. Up to 169 conditions per place. [2021-08-13 02:38:11,966 INFO L132 encePairwiseOnDemand]: 507/509 looper letters, 0 selfloop transitions, 1 changer transitions 0/506 dead transitions. [2021-08-13 02:38:11,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 845 places, 506 transitions, 29910 flow [2021-08-13 02:38:11,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:38:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:38:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1520 transitions. [2021-08-13 02:38:11,967 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9954158480681073 [2021-08-13 02:38:11,967 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1520 transitions. [2021-08-13 02:38:11,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1520 transitions. [2021-08-13 02:38:11,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:38:11,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1520 transitions. [2021-08-13 02:38:11,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 506.6666666666667) internal successors, (1520), 3 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:11,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 509.0) internal successors, (2036), 4 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:11,969 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 509.0) internal successors, (2036), 4 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:11,969 INFO L348 CegarLoopForPetriNet]: 844 programPoint places, 1 predicate places. [2021-08-13 02:38:11,969 INFO L482 AbstractCegarLoop]: Abstraction has has 845 places, 506 transitions, 29910 flow [2021-08-13 02:38:11,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 506.6666666666667) internal successors, (1520), 3 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:11,969 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:11,969 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:38:11,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334 [2021-08-13 02:38:11,969 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:11,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:11,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1050637476, now seen corresponding path program 1 times [2021-08-13 02:38:11,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:11,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862487363] [2021-08-13 02:38:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:12,313 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:12,316 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:12,374 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:38:12,374 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:38:12,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335 [2021-08-13 02:38:12,374 WARN L235 ceAbstractionStarter]: 168 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:38:12,374 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 169 thread instances. [2021-08-13 02:38:12,506 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:38:12,507 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:38:12,507 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:38:12,507 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:38:12,507 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:38:12,507 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:38:12,507 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:38:12,507 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:38:12,507 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:38:12,507 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:38:12,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 851 places, 512 transitions, 30261 flow [2021-08-13 02:38:13,375 INFO L129 PetriNetUnfolder]: 0/1019 cut-off events. [2021-08-13 02:38:13,375 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:13,375 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15892 conditions, 1019 events. 0/1019 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4002 event pairs, 0 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 0. Up to 170 conditions per place. [2021-08-13 02:38:13,375 INFO L82 GeneralOperation]: Start removeDead. Operand has 851 places, 512 transitions, 30261 flow [2021-08-13 02:38:13,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 849 places, 510 transitions, 30257 flow [2021-08-13 02:38:13,385 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:38:13,385 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:13,385 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:13,385 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:38:13,385 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:13,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:13,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1407139, now seen corresponding path program 1 times [2021-08-13 02:38:13,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:13,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828438424] [2021-08-13 02:38:13,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:38:13,469 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:38:13,469 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:38:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:38:13,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:38:13,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828438424] [2021-08-13 02:38:13,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828438424] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:38:13,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:38:13,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:38:13,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144502489] [2021-08-13 02:38:13,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:38:13,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:38:13,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:38:13,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:38:13,472 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 509 out of 512 [2021-08-13 02:38:13,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 849 places, 510 transitions, 30257 flow. Second operand has 3 states, 3 states have (on average 509.6666666666667) internal successors, (1529), 3 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:13,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:38:13,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 509 of 512 [2021-08-13 02:38:13,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:38:14,220 INFO L129 PetriNetUnfolder]: 0/509 cut-off events. [2021-08-13 02:38:14,221 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:14,221 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15384 conditions, 509 events. 0/509 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 978 event pairs, 0 based on Foata normal form. 170/679 useless extension candidates. Maximal degree in co-relation 0. Up to 170 conditions per place. [2021-08-13 02:38:14,223 INFO L132 encePairwiseOnDemand]: 510/512 looper letters, 0 selfloop transitions, 1 changer transitions 0/509 dead transitions. [2021-08-13 02:38:14,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 509 transitions, 30257 flow [2021-08-13 02:38:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:38:14,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:38:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1529 transitions. [2021-08-13 02:38:14,224 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9954427083333334 [2021-08-13 02:38:14,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1529 transitions. [2021-08-13 02:38:14,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1529 transitions. [2021-08-13 02:38:14,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:38:14,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1529 transitions. [2021-08-13 02:38:14,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 509.6666666666667) internal successors, (1529), 3 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:14,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 512.0) internal successors, (2048), 4 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:14,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 512.0) internal successors, (2048), 4 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:14,226 INFO L348 CegarLoopForPetriNet]: 849 programPoint places, 1 predicate places. [2021-08-13 02:38:14,226 INFO L482 AbstractCegarLoop]: Abstraction has has 850 places, 509 transitions, 30257 flow [2021-08-13 02:38:14,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 509.6666666666667) internal successors, (1529), 3 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:14,226 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:14,226 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:38:14,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336 [2021-08-13 02:38:14,226 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:14,227 INFO L82 PathProgramCache]: Analyzing trace with hash 727553681, now seen corresponding path program 1 times [2021-08-13 02:38:14,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:14,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359217543] [2021-08-13 02:38:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:14,533 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:14,536 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:14,589 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:38:14,589 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:38:14,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337 [2021-08-13 02:38:14,590 WARN L235 ceAbstractionStarter]: 169 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:38:14,590 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 170 thread instances. [2021-08-13 02:38:14,722 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:38:14,723 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:38:14,723 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:38:14,723 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:38:14,723 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:38:14,723 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:38:14,723 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:38:14,723 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:38:14,723 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:38:14,724 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:38:14,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 856 places, 515 transitions, 30610 flow [2021-08-13 02:38:15,589 INFO L129 PetriNetUnfolder]: 0/1025 cut-off events. [2021-08-13 02:38:15,589 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:15,589 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16071 conditions, 1025 events. 0/1025 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4089 event pairs, 0 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 0. Up to 171 conditions per place. [2021-08-13 02:38:15,589 INFO L82 GeneralOperation]: Start removeDead. Operand has 856 places, 515 transitions, 30610 flow [2021-08-13 02:38:15,598 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 854 places, 513 transitions, 30606 flow [2021-08-13 02:38:15,599 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:38:15,599 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:15,599 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:15,599 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:38:15,599 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:15,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:15,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1423619, now seen corresponding path program 1 times [2021-08-13 02:38:15,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:15,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760681159] [2021-08-13 02:38:15,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:38:15,684 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:38:15,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:38:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:38:15,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:38:15,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760681159] [2021-08-13 02:38:15,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760681159] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:38:15,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:38:15,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:38:15,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091420827] [2021-08-13 02:38:15,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:38:15,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:38:15,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:38:15,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:38:15,689 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 512 out of 515 [2021-08-13 02:38:15,689 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 854 places, 513 transitions, 30606 flow. Second operand has 3 states, 3 states have (on average 512.6666666666666) internal successors, (1538), 3 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:15,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:38:15,689 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 512 of 515 [2021-08-13 02:38:15,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:38:16,372 INFO L129 PetriNetUnfolder]: 0/512 cut-off events. [2021-08-13 02:38:16,372 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:16,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15560 conditions, 512 events. 0/512 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 889 event pairs, 0 based on Foata normal form. 171/683 useless extension candidates. Maximal degree in co-relation 0. Up to 171 conditions per place. [2021-08-13 02:38:16,374 INFO L132 encePairwiseOnDemand]: 513/515 looper letters, 0 selfloop transitions, 1 changer transitions 0/512 dead transitions. [2021-08-13 02:38:16,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 855 places, 512 transitions, 30606 flow [2021-08-13 02:38:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:38:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:38:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1538 transitions. [2021-08-13 02:38:16,375 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9954692556634305 [2021-08-13 02:38:16,375 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1538 transitions. [2021-08-13 02:38:16,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1538 transitions. [2021-08-13 02:38:16,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:38:16,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1538 transitions. [2021-08-13 02:38:16,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 512.6666666666666) internal successors, (1538), 3 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:16,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:16,377 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:16,377 INFO L348 CegarLoopForPetriNet]: 854 programPoint places, 1 predicate places. [2021-08-13 02:38:16,377 INFO L482 AbstractCegarLoop]: Abstraction has has 855 places, 512 transitions, 30606 flow [2021-08-13 02:38:16,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 512.6666666666666) internal successors, (1538), 3 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:16,377 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:16,378 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:38:16,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338 [2021-08-13 02:38:16,378 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:16,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:16,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2027214809, now seen corresponding path program 1 times [2021-08-13 02:38:16,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:16,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99196220] [2021-08-13 02:38:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:16,463 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:16,466 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:16,526 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:38:16,527 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:38:16,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339 [2021-08-13 02:38:16,527 WARN L235 ceAbstractionStarter]: 170 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:38:16,527 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 171 thread instances. [2021-08-13 02:38:16,905 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:38:16,905 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:38:16,905 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:38:16,905 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:38:16,905 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:38:16,906 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:38:16,906 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:38:16,906 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:38:16,906 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:38:16,906 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:38:16,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 861 places, 518 transitions, 30961 flow [2021-08-13 02:38:17,794 INFO L129 PetriNetUnfolder]: 0/1031 cut-off events. [2021-08-13 02:38:17,794 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:17,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16251 conditions, 1031 events. 0/1031 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4034 event pairs, 0 based on Foata normal form. 0/859 useless extension candidates. Maximal degree in co-relation 0. Up to 172 conditions per place. [2021-08-13 02:38:17,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 861 places, 518 transitions, 30961 flow [2021-08-13 02:38:17,804 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 859 places, 516 transitions, 30957 flow [2021-08-13 02:38:17,805 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:38:17,805 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:17,805 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:17,805 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:38:17,805 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:17,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1440195, now seen corresponding path program 1 times [2021-08-13 02:38:17,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:17,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943317265] [2021-08-13 02:38:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:38:17,891 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:38:17,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:38:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:38:17,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:38:17,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943317265] [2021-08-13 02:38:17,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943317265] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:38:17,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:38:17,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:38:17,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600633333] [2021-08-13 02:38:17,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:38:17,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:38:17,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:38:17,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:38:17,896 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 515 out of 518 [2021-08-13 02:38:17,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 859 places, 516 transitions, 30957 flow. Second operand has 3 states, 3 states have (on average 515.6666666666666) internal successors, (1547), 3 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:17,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:38:17,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 515 of 518 [2021-08-13 02:38:17,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:38:18,601 INFO L129 PetriNetUnfolder]: 0/515 cut-off events. [2021-08-13 02:38:18,601 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:18,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15737 conditions, 515 events. 0/515 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1028 event pairs, 0 based on Foata normal form. 172/687 useless extension candidates. Maximal degree in co-relation 0. Up to 172 conditions per place. [2021-08-13 02:38:18,603 INFO L132 encePairwiseOnDemand]: 516/518 looper letters, 0 selfloop transitions, 1 changer transitions 0/515 dead transitions. [2021-08-13 02:38:18,603 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 860 places, 515 transitions, 30957 flow [2021-08-13 02:38:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:38:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:38:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1547 transitions. [2021-08-13 02:38:18,604 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9954954954954955 [2021-08-13 02:38:18,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1547 transitions. [2021-08-13 02:38:18,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1547 transitions. [2021-08-13 02:38:18,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:38:18,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1547 transitions. [2021-08-13 02:38:18,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 515.6666666666666) internal successors, (1547), 3 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:18,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 518.0) internal successors, (2072), 4 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:18,608 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 518.0) internal successors, (2072), 4 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:18,608 INFO L348 CegarLoopForPetriNet]: 859 programPoint places, 1 predicate places. [2021-08-13 02:38:18,608 INFO L482 AbstractCegarLoop]: Abstraction has has 860 places, 515 transitions, 30957 flow [2021-08-13 02:38:18,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 515.6666666666666) internal successors, (1547), 3 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:18,608 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:18,608 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:38:18,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340 [2021-08-13 02:38:18,608 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:18,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:18,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1012787065, now seen corresponding path program 1 times [2021-08-13 02:38:18,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:18,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75972364] [2021-08-13 02:38:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:18,693 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:18,696 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:18,767 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:38:18,767 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:38:18,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341 [2021-08-13 02:38:18,767 WARN L235 ceAbstractionStarter]: 171 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:38:18,767 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 172 thread instances. [2021-08-13 02:38:19,126 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:38:19,127 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:38:19,127 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:38:19,127 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:38:19,127 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:38:19,127 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:38:19,127 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:38:19,127 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:38:19,127 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:38:19,128 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:38:19,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 866 places, 521 transitions, 31314 flow [2021-08-13 02:38:20,027 INFO L129 PetriNetUnfolder]: 0/1037 cut-off events. [2021-08-13 02:38:20,027 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:20,027 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16432 conditions, 1037 events. 0/1037 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4023 event pairs, 0 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 0. Up to 173 conditions per place. [2021-08-13 02:38:20,027 INFO L82 GeneralOperation]: Start removeDead. Operand has 866 places, 521 transitions, 31314 flow [2021-08-13 02:38:20,036 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 864 places, 519 transitions, 31310 flow [2021-08-13 02:38:20,037 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-13 02:38:20,037 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:20,037 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:20,037 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:38:20,037 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:20,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:20,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1456867, now seen corresponding path program 1 times [2021-08-13 02:38:20,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:20,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894972691] [2021-08-13 02:38:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:38:20,123 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:38:20,123 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:38:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:38:20,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:38:20,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894972691] [2021-08-13 02:38:20,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894972691] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:38:20,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:38:20,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:38:20,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080371948] [2021-08-13 02:38:20,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:38:20,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:38:20,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:38:20,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:38:20,127 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 518 out of 521 [2021-08-13 02:38:20,127 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 864 places, 519 transitions, 31310 flow. Second operand has 3 states, 3 states have (on average 518.6666666666666) internal successors, (1556), 3 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:20,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:38:20,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 518 of 521 [2021-08-13 02:38:20,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:38:20,882 INFO L129 PetriNetUnfolder]: 0/518 cut-off events. [2021-08-13 02:38:20,882 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:20,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15915 conditions, 518 events. 0/518 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 960 event pairs, 0 based on Foata normal form. 173/691 useless extension candidates. Maximal degree in co-relation 0. Up to 173 conditions per place. [2021-08-13 02:38:20,884 INFO L132 encePairwiseOnDemand]: 519/521 looper letters, 0 selfloop transitions, 1 changer transitions 0/518 dead transitions. [2021-08-13 02:38:20,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 865 places, 518 transitions, 31310 flow [2021-08-13 02:38:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:38:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:38:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1556 transitions. [2021-08-13 02:38:20,884 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9955214331413947 [2021-08-13 02:38:20,884 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1556 transitions. [2021-08-13 02:38:20,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1556 transitions. [2021-08-13 02:38:20,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:38:20,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1556 transitions. [2021-08-13 02:38:20,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 518.6666666666666) internal successors, (1556), 3 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:20,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 521.0) internal successors, (2084), 4 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:20,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 521.0) internal successors, (2084), 4 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:20,886 INFO L348 CegarLoopForPetriNet]: 864 programPoint places, 1 predicate places. [2021-08-13 02:38:20,886 INFO L482 AbstractCegarLoop]: Abstraction has has 865 places, 518 transitions, 31310 flow [2021-08-13 02:38:20,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 518.6666666666666) internal successors, (1556), 3 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:20,886 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:20,887 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:38:20,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342 [2021-08-13 02:38:20,887 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:20,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:20,887 INFO L82 PathProgramCache]: Analyzing trace with hash 901009898, now seen corresponding path program 1 times [2021-08-13 02:38:20,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:20,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41376891] [2021-08-13 02:38:20,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:20,976 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:20,978 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:21,040 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:38:21,040 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:38:21,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343 [2021-08-13 02:38:21,041 WARN L235 ceAbstractionStarter]: 172 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:38:21,041 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 173 thread instances. [2021-08-13 02:38:21,176 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:38:21,176 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:38:21,177 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:38:21,177 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:38:21,177 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:38:21,177 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:38:21,177 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:38:21,177 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:38:21,177 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:38:21,177 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:38:21,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 871 places, 524 transitions, 31669 flow [2021-08-13 02:38:22,353 INFO L129 PetriNetUnfolder]: 0/1043 cut-off events. [2021-08-13 02:38:22,354 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:22,354 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16614 conditions, 1043 events. 0/1043 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4042 event pairs, 0 based on Foata normal form. 0/869 useless extension candidates. Maximal degree in co-relation 0. Up to 174 conditions per place. [2021-08-13 02:38:22,354 INFO L82 GeneralOperation]: Start removeDead. Operand has 871 places, 524 transitions, 31669 flow [2021-08-13 02:38:22,363 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 869 places, 522 transitions, 31665 flow [2021-08-13 02:38:22,364 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:38:22,364 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:22,364 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:22,364 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:38:22,364 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:22,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1473635, now seen corresponding path program 1 times [2021-08-13 02:38:22,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:22,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700544458] [2021-08-13 02:38:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:38:22,453 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:38:22,454 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:38:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:38:22,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:38:22,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700544458] [2021-08-13 02:38:22,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700544458] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:38:22,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:38:22,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:38:22,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411487110] [2021-08-13 02:38:22,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:38:22,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:38:22,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:38:22,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:38:22,457 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 521 out of 524 [2021-08-13 02:38:22,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 869 places, 522 transitions, 31665 flow. Second operand has 3 states, 3 states have (on average 521.6666666666666) internal successors, (1565), 3 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:22,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:38:22,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 521 of 524 [2021-08-13 02:38:22,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:38:23,310 INFO L129 PetriNetUnfolder]: 0/521 cut-off events. [2021-08-13 02:38:23,310 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:23,310 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16094 conditions, 521 events. 0/521 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1017 event pairs, 0 based on Foata normal form. 174/695 useless extension candidates. Maximal degree in co-relation 0. Up to 174 conditions per place. [2021-08-13 02:38:23,312 INFO L132 encePairwiseOnDemand]: 522/524 looper letters, 0 selfloop transitions, 1 changer transitions 0/521 dead transitions. [2021-08-13 02:38:23,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 870 places, 521 transitions, 31665 flow [2021-08-13 02:38:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:38:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:38:23,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1565 transitions. [2021-08-13 02:38:23,312 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9955470737913485 [2021-08-13 02:38:23,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1565 transitions. [2021-08-13 02:38:23,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1565 transitions. [2021-08-13 02:38:23,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:38:23,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1565 transitions. [2021-08-13 02:38:23,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 521.6666666666666) internal successors, (1565), 3 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:23,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 524.0) internal successors, (2096), 4 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:23,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 524.0) internal successors, (2096), 4 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:23,314 INFO L348 CegarLoopForPetriNet]: 869 programPoint places, 1 predicate places. [2021-08-13 02:38:23,314 INFO L482 AbstractCegarLoop]: Abstraction has has 870 places, 521 transitions, 31665 flow [2021-08-13 02:38:23,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 521.6666666666666) internal successors, (1565), 3 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:23,314 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:23,314 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:38:23,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344 [2021-08-13 02:38:23,315 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:23,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:23,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1726015661, now seen corresponding path program 1 times [2021-08-13 02:38:23,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:23,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114959246] [2021-08-13 02:38:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:23,402 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:23,405 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:23,467 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:38:23,468 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:38:23,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable345 [2021-08-13 02:38:23,468 WARN L235 ceAbstractionStarter]: 173 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:38:23,468 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 174 thread instances. [2021-08-13 02:38:23,605 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:38:23,605 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:38:23,605 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:38:23,605 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:38:23,605 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:38:23,606 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:38:23,606 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:38:23,606 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:38:23,606 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:38:23,606 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:38:23,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 876 places, 527 transitions, 32026 flow [2021-08-13 02:38:24,805 INFO L129 PetriNetUnfolder]: 0/1049 cut-off events. [2021-08-13 02:38:24,806 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:24,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16797 conditions, 1049 events. 0/1049 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4043 event pairs, 0 based on Foata normal form. 0/874 useless extension candidates. Maximal degree in co-relation 0. Up to 175 conditions per place. [2021-08-13 02:38:24,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 876 places, 527 transitions, 32026 flow [2021-08-13 02:38:24,816 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 874 places, 525 transitions, 32022 flow [2021-08-13 02:38:24,816 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-13 02:38:24,816 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:24,816 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:24,817 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-13 02:38:24,817 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:24,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:24,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1490499, now seen corresponding path program 1 times [2021-08-13 02:38:24,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:24,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165472512] [2021-08-13 02:38:24,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:38:24,903 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:38:24,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:38:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:38:24,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:38:24,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165472512] [2021-08-13 02:38:24,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165472512] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:38:24,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:38:24,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 02:38:24,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5468278] [2021-08-13 02:38:24,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 02:38:24,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:38:24,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 02:38:24,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 02:38:24,907 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 524 out of 527 [2021-08-13 02:38:24,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 874 places, 525 transitions, 32022 flow. Second operand has 3 states, 3 states have (on average 524.6666666666666) internal successors, (1574), 3 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:24,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:38:24,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 524 of 527 [2021-08-13 02:38:24,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:38:25,688 INFO L129 PetriNetUnfolder]: 0/524 cut-off events. [2021-08-13 02:38:25,689 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:38:25,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16274 conditions, 524 events. 0/524 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 956 event pairs, 0 based on Foata normal form. 175/699 useless extension candidates. Maximal degree in co-relation 0. Up to 175 conditions per place. [2021-08-13 02:38:25,690 INFO L132 encePairwiseOnDemand]: 525/527 looper letters, 0 selfloop transitions, 1 changer transitions 0/524 dead transitions. [2021-08-13 02:38:25,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 875 places, 524 transitions, 32022 flow [2021-08-13 02:38:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 02:38:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 02:38:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1574 transitions. [2021-08-13 02:38:25,691 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9955724225173941 [2021-08-13 02:38:25,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1574 transitions. [2021-08-13 02:38:25,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1574 transitions. [2021-08-13 02:38:25,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:38:25,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1574 transitions. [2021-08-13 02:38:25,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 524.6666666666666) internal successors, (1574), 3 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:25,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 527.0) internal successors, (2108), 4 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:25,693 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 527.0) internal successors, (2108), 4 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:25,693 INFO L348 CegarLoopForPetriNet]: 874 programPoint places, 1 predicate places. [2021-08-13 02:38:25,693 INFO L482 AbstractCegarLoop]: Abstraction has has 875 places, 524 transitions, 32022 flow [2021-08-13 02:38:25,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 524.6666666666666) internal successors, (1574), 3 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:25,693 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:25,693 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:38:25,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346 [2021-08-13 02:38:25,693 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash -2005881235, now seen corresponding path program 1 times [2021-08-13 02:38:25,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:25,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334454962] [2021-08-13 02:38:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:25,779 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:38:25,782 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:38:25,846 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:38:25,846 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:38:25,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347 [2021-08-13 02:38:25,846 WARN L235 ceAbstractionStarter]: 174 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:38:25,846 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 175 thread instances. [2021-08-13 02:38:25,980 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:38:25,981 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-13 02:38:25,981 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:38:25,981 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:38:25,981 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:38:25,981 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:38:25,981 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:38:25,981 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:38:25,981 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:38:25,981 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:38:25,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 881 places, 530 transitions, 32385 flow