/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_noop.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 21:45:50,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 21:45:50,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 21:45:50,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-12 21:45:50,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-12 21:45:50,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-12 21:45:50,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-12 21:45:50,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-12 21:45:50,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-12 21:45:50,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-12 21:45:50,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-12 21:45:50,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-12 21:45:50,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 21:45:50,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 21:45:50,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 21:45:50,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 21:45:50,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 21:45:50,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 21:45:50,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 21:45:50,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 21:45:50,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 21:45:50,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 21:45:50,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 21:45:50,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 21:45:50,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-12 21:45:50,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-08-12 21:45:50,957 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 21:45:50,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 21:45:50,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 21:45:50,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 21:45:50,959 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 21:45:50,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 21:45:50,959 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 21:45:50,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 21:45:50,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 21:45:50,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 21:45:50,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 21:45:50,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 21:45:50,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 21:45:50,960 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 21:45:50,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 21:45:50,960 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 21:45:50,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 21:45:50,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 21:45:50,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 21:45:50,961 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 21:45:50,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 21:45:50,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 21:45:50,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 21:45:50,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 21:45:50,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-12 21:45:50,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 21:45:50,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 21:45:50,962 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 21:45:50,962 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-08-12 21:45:50,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 21:45:50,962 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 21:45:51,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 21:45:51,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 21:45:51,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 21:45:51,318 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 21:45:51,319 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 21:45:51,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_noop.bpl [2021-08-12 21:45:51,320 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_noop.bpl' [2021-08-12 21:45:51,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 21:45:51,354 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 21:45:51,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 21:45:51,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 21:45:51,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 21:45:51,364 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 12.08 09:45:51" (1/1) ... [2021-08-12 21:45:51,369 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 12.08 09:45:51" (1/1) ... [2021-08-12 21:45:51,375 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 21:45:51,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 21:45:51,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 21:45:51,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 21:45:51,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 09:45:51" (1/1) ... [2021-08-12 21:45:51,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 09:45:51" (1/1) ... [2021-08-12 21:45:51,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 09:45:51" (1/1) ... [2021-08-12 21:45:51,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 09:45:51" (1/1) ... [2021-08-12 21:45:51,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 09:45:51" (1/1) ... [2021-08-12 21:45:51,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 09:45:51" (1/1) ... [2021-08-12 21:45:51,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 09:45:51" (1/1) ... [2021-08-12 21:45:51,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 21:45:51,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 21:45:51,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 21:45:51,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 21:45:51,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 09:45:51" (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 [2021-08-12 21:45:51,469 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 21:45:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 21:45:51,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 21:45:51,485 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-08-12 21:45:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-08-12 21:45:51,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-08-12 21:45:51,486 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 21:45:51,594 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 21:45:51,594 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-12 21:45:51,595 INFO L202 PluginConnector]: Adding new model fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 09:45:51 BoogieIcfgContainer [2021-08-12 21:45:51,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 21:45:51,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 21:45:51,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 21:45:51,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 21:45:51,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 09:45:51" (1/2) ... [2021-08-12 21:45:51,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130157f1 and model type fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 09:45:51, skipping insertion in model container [2021-08-12 21:45:51,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 09:45:51" (2/2) ... [2021-08-12 21:45:51,602 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_noop.bpl [2021-08-12 21:45:51,608 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 21:45:51,609 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 21:45:51,609 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 21:45:51,636 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:51,653 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:51,679 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:51,679 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:51,679 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:51,680 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:51,680 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:51,680 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:51,680 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:51,680 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:51,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 11 places, 8 transitions, 21 flow [2021-08-12 21:45:51,705 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-08-12 21:45:51,706 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:51,707 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. [2021-08-12 21:45:51,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 11 places, 8 transitions, 21 flow [2021-08-12 21:45:51,710 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 9 places, 6 transitions, 17 flow [2021-08-12 21:45:51,715 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:51,716 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:51,716 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:51,716 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:51,717 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:51,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1315, now seen corresponding path program 1 times [2021-08-12 21:45:51,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:51,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643576477] [2021-08-12 21:45:51,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:51,810 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:51,813 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:51,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:51,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643576477] [2021-08-12 21:45:51,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643576477] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:51,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:51,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:51,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510301432] [2021-08-12 21:45:51,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:51,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:51,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:51,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:51,847 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 8 [2021-08-12 21:45:51,849 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) [2021-08-12 21:45:51,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:51,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 8 [2021-08-12 21:45:51,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:51,855 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-08-12 21:45:51,855 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:51,856 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. [2021-08-12 21:45:51,857 INFO L132 encePairwiseOnDemand]: 6/8 looper letters, 0 selfloop transitions, 1 changer transitions 0/5 dead transitions. [2021-08-12 21:45:51,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 5 transitions, 17 flow [2021-08-12 21:45:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 17 transitions. [2021-08-12 21:45:51,864 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2021-08-12 21:45:51,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 17 transitions. [2021-08-12 21:45:51,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 17 transitions. [2021-08-12 21:45:51,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:51,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 17 transitions. [2021-08-12 21:45:51,868 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) [2021-08-12 21:45:51,870 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) [2021-08-12 21:45:51,870 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) [2021-08-12 21:45:51,871 INFO L348 CegarLoopForPetriNet]: 9 programPoint places, 1 predicate places. [2021-08-12 21:45:51,871 INFO L482 AbstractCegarLoop]: Abstraction has has 10 places, 5 transitions, 17 flow [2021-08-12 21:45:51,872 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) [2021-08-12 21:45:51,872 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:51,872 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2021-08-12 21:45:51,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 21:45:51,874 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:51,876 INFO L82 PathProgramCache]: Analyzing trace with hash 41033, now seen corresponding path program 1 times [2021-08-12 21:45:51,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:51,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748901050] [2021-08-12 21:45:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:51,883 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:51,895 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:51,905 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:51,905 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:51,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 21:45:51,907 WARN L235 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:51,907 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-08-12 21:45:51,919 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:51,919 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:51,922 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:51,922 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:51,922 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:51,922 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:51,922 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:51,922 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:51,922 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:51,922 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:51,923 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 11 transitions, 34 flow [2021-08-12 21:45:51,929 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-08-12 21:45:51,929 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:51,929 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. [2021-08-12 21:45:51,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 16 places, 11 transitions, 34 flow [2021-08-12 21:45:51,930 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 14 places, 9 transitions, 30 flow [2021-08-12 21:45:51,940 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:51,940 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:51,940 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:51,940 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:51,941 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:51,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:51,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1667, now seen corresponding path program 1 times [2021-08-12 21:45:51,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:51,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100864925] [2021-08-12 21:45:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:51,954 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:51,956 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:51,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:51,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100864925] [2021-08-12 21:45:51,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100864925] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:51,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:51,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:51,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312183975] [2021-08-12 21:45:51,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:51,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:51,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:51,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:51,973 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 11 [2021-08-12 21:45:51,973 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) [2021-08-12 21:45:51,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:51,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 11 [2021-08-12 21:45:51,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:51,976 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-08-12 21:45:51,976 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:51,976 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. [2021-08-12 21:45:51,976 INFO L132 encePairwiseOnDemand]: 9/11 looper letters, 0 selfloop transitions, 1 changer transitions 0/8 dead transitions. [2021-08-12 21:45:51,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 8 transitions, 30 flow [2021-08-12 21:45:51,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:51,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2021-08-12 21:45:51,977 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2021-08-12 21:45:51,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 26 transitions. [2021-08-12 21:45:51,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 26 transitions. [2021-08-12 21:45:51,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:51,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 26 transitions. [2021-08-12 21:45:51,977 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) [2021-08-12 21:45:51,978 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) [2021-08-12 21:45:51,978 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) [2021-08-12 21:45:51,978 INFO L348 CegarLoopForPetriNet]: 14 programPoint places, 1 predicate places. [2021-08-12 21:45:51,978 INFO L482 AbstractCegarLoop]: Abstraction has has 15 places, 8 transitions, 30 flow [2021-08-12 21:45:51,978 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) [2021-08-12 21:45:51,978 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:51,978 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-08-12 21:45:51,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 21:45:51,978 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:51,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:51,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1612715, now seen corresponding path program 1 times [2021-08-12 21:45:51,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:51,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107822843] [2021-08-12 21:45:51,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:51,982 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:51,983 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:51,984 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:51,984 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:51,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 21:45:51,986 WARN L235 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:51,986 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-08-12 21:45:52,005 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:52,005 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:52,006 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:52,006 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:52,006 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:52,006 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:52,006 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:52,006 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:52,006 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:52,006 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:52,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 14 transitions, 49 flow [2021-08-12 21:45:52,010 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-08-12 21:45:52,010 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,011 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. [2021-08-12 21:45:52,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 14 transitions, 49 flow [2021-08-12 21:45:52,011 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 12 transitions, 45 flow [2021-08-12 21:45:52,011 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:52,012 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,012 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,012 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:52,012 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,012 INFO L82 PathProgramCache]: Analyzing trace with hash 2115, now seen corresponding path program 1 times [2021-08-12 21:45:52,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513384712] [2021-08-12 21:45:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:52,033 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:52,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:52,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:52,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513384712] [2021-08-12 21:45:52,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513384712] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:52,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:52,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:52,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073936710] [2021-08-12 21:45:52,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:52,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:52,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:52,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:52,038 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 14 [2021-08-12 21:45:52,039 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) [2021-08-12 21:45:52,039 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:52,039 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 14 [2021-08-12 21:45:52,039 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:52,057 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-08-12 21:45:52,057 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,057 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. [2021-08-12 21:45:52,058 INFO L132 encePairwiseOnDemand]: 12/14 looper letters, 0 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2021-08-12 21:45:52,058 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 11 transitions, 45 flow [2021-08-12 21:45:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:52,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 35 transitions. [2021-08-12 21:45:52,058 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-08-12 21:45:52,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 35 transitions. [2021-08-12 21:45:52,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 35 transitions. [2021-08-12 21:45:52,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:52,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 35 transitions. [2021-08-12 21:45:52,059 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) [2021-08-12 21:45:52,060 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) [2021-08-12 21:45:52,060 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) [2021-08-12 21:45:52,060 INFO L348 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2021-08-12 21:45:52,060 INFO L482 AbstractCegarLoop]: Abstraction has has 20 places, 11 transitions, 45 flow [2021-08-12 21:45:52,060 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) [2021-08-12 21:45:52,060 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,060 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-12 21:45:52,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 21:45:52,061 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,061 INFO L82 PathProgramCache]: Analyzing trace with hash 63416129, now seen corresponding path program 1 times [2021-08-12 21:45:52,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422328578] [2021-08-12 21:45:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,064 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,066 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,067 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:52,067 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:52,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-12 21:45:52,067 WARN L235 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:52,067 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-08-12 21:45:52,086 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:52,087 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:52,088 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:52,088 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:52,088 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:52,088 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:52,088 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:52,088 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:52,088 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:52,088 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:52,089 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 26 places, 17 transitions, 66 flow [2021-08-12 21:45:52,093 INFO L129 PetriNetUnfolder]: 0/29 cut-off events. [2021-08-12 21:45:52,093 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,093 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. [2021-08-12 21:45:52,093 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 17 transitions, 66 flow [2021-08-12 21:45:52,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 15 transitions, 62 flow [2021-08-12 21:45:52,094 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:52,094 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,094 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,094 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:52,094 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2659, now seen corresponding path program 1 times [2021-08-12 21:45:52,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055775845] [2021-08-12 21:45:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:52,113 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:52,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:52,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:52,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055775845] [2021-08-12 21:45:52,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055775845] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:52,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:52,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:52,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55373719] [2021-08-12 21:45:52,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:52,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:52,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:52,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:52,118 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 17 [2021-08-12 21:45:52,118 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) [2021-08-12 21:45:52,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:52,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 17 [2021-08-12 21:45:52,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:52,122 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-08-12 21:45:52,122 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,122 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. [2021-08-12 21:45:52,122 INFO L132 encePairwiseOnDemand]: 15/17 looper letters, 0 selfloop transitions, 1 changer transitions 0/14 dead transitions. [2021-08-12 21:45:52,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 14 transitions, 62 flow [2021-08-12 21:45:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:52,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:52,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2021-08-12 21:45:52,123 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8627450980392157 [2021-08-12 21:45:52,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 44 transitions. [2021-08-12 21:45:52,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 44 transitions. [2021-08-12 21:45:52,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:52,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 44 transitions. [2021-08-12 21:45:52,124 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) [2021-08-12 21:45:52,124 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) [2021-08-12 21:45:52,124 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) [2021-08-12 21:45:52,124 INFO L348 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2021-08-12 21:45:52,125 INFO L482 AbstractCegarLoop]: Abstraction has has 25 places, 14 transitions, 62 flow [2021-08-12 21:45:52,125 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) [2021-08-12 21:45:52,125 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,125 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-12 21:45:52,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-12 21:45:52,125 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1824239762, now seen corresponding path program 1 times [2021-08-12 21:45:52,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312328483] [2021-08-12 21:45:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,145 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,147 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,149 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:52,149 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:52,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-12 21:45:52,149 WARN L235 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:52,149 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-08-12 21:45:52,170 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:52,171 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:52,172 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:52,172 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:52,172 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:52,172 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:52,172 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:52,172 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:52,172 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:52,172 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:52,173 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 20 transitions, 85 flow [2021-08-12 21:45:52,178 INFO L129 PetriNetUnfolder]: 0/35 cut-off events. [2021-08-12 21:45:52,178 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,178 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. [2021-08-12 21:45:52,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 20 transitions, 85 flow [2021-08-12 21:45:52,178 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 18 transitions, 81 flow [2021-08-12 21:45:52,179 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:52,179 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,179 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,179 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:52,179 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,180 INFO L82 PathProgramCache]: Analyzing trace with hash 3299, now seen corresponding path program 1 times [2021-08-12 21:45:52,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679900519] [2021-08-12 21:45:52,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:52,189 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:52,190 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:52,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:52,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679900519] [2021-08-12 21:45:52,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679900519] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:52,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:52,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:52,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753696805] [2021-08-12 21:45:52,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:52,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:52,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:52,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:52,195 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 20 [2021-08-12 21:45:52,195 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) [2021-08-12 21:45:52,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:52,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 20 [2021-08-12 21:45:52,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:52,199 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-08-12 21:45:52,199 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,199 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. [2021-08-12 21:45:52,200 INFO L132 encePairwiseOnDemand]: 18/20 looper letters, 0 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2021-08-12 21:45:52,200 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 17 transitions, 81 flow [2021-08-12 21:45:52,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:52,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:52,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2021-08-12 21:45:52,212 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8833333333333333 [2021-08-12 21:45:52,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 53 transitions. [2021-08-12 21:45:52,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 53 transitions. [2021-08-12 21:45:52,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:52,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 53 transitions. [2021-08-12 21:45:52,213 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) [2021-08-12 21:45:52,214 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) [2021-08-12 21:45:52,214 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) [2021-08-12 21:45:52,214 INFO L348 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2021-08-12 21:45:52,214 INFO L482 AbstractCegarLoop]: Abstraction has has 30 places, 17 transitions, 81 flow [2021-08-12 21:45:52,215 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) [2021-08-12 21:45:52,215 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,215 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:45:52,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-12 21:45:52,215 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,216 INFO L82 PathProgramCache]: Analyzing trace with hash 504182917, now seen corresponding path program 1 times [2021-08-12 21:45:52,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840644774] [2021-08-12 21:45:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,220 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,223 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,230 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:52,230 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:52,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-12 21:45:52,231 WARN L235 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:52,231 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-08-12 21:45:52,255 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:52,255 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:52,256 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:52,256 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:52,256 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:52,256 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:52,257 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:52,257 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:52,257 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:52,257 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:52,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 23 transitions, 106 flow [2021-08-12 21:45:52,263 INFO L129 PetriNetUnfolder]: 0/41 cut-off events. [2021-08-12 21:45:52,263 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,264 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. [2021-08-12 21:45:52,264 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 23 transitions, 106 flow [2021-08-12 21:45:52,264 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 21 transitions, 102 flow [2021-08-12 21:45:52,265 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:52,265 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,265 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,265 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:52,265 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,265 INFO L82 PathProgramCache]: Analyzing trace with hash 4035, now seen corresponding path program 1 times [2021-08-12 21:45:52,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177893451] [2021-08-12 21:45:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:52,278 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:52,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:52,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:52,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177893451] [2021-08-12 21:45:52,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177893451] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:52,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:52,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:52,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363212842] [2021-08-12 21:45:52,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:52,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:52,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:52,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:52,288 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 23 [2021-08-12 21:45:52,289 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) [2021-08-12 21:45:52,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:52,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 23 [2021-08-12 21:45:52,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:52,293 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-08-12 21:45:52,294 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,294 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. [2021-08-12 21:45:52,294 INFO L132 encePairwiseOnDemand]: 21/23 looper letters, 0 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2021-08-12 21:45:52,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 20 transitions, 102 flow [2021-08-12 21:45:52,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:52,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:52,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2021-08-12 21:45:52,295 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8985507246376812 [2021-08-12 21:45:52,295 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 62 transitions. [2021-08-12 21:45:52,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 62 transitions. [2021-08-12 21:45:52,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:52,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 62 transitions. [2021-08-12 21:45:52,296 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) [2021-08-12 21:45:52,296 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) [2021-08-12 21:45:52,302 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) [2021-08-12 21:45:52,303 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2021-08-12 21:45:52,303 INFO L482 AbstractCegarLoop]: Abstraction has has 35 places, 20 transitions, 102 flow [2021-08-12 21:45:52,303 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) [2021-08-12 21:45:52,303 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,304 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:45:52,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-12 21:45:52,304 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1332075505, now seen corresponding path program 1 times [2021-08-12 21:45:52,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697650125] [2021-08-12 21:45:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,315 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,317 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,319 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:52,319 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:52,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-12 21:45:52,320 WARN L235 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:52,320 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-08-12 21:45:52,344 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:52,344 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:52,347 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:52,348 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:52,348 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:52,348 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:52,348 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:52,348 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:52,348 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:52,348 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:52,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 41 places, 26 transitions, 129 flow [2021-08-12 21:45:52,360 INFO L129 PetriNetUnfolder]: 0/47 cut-off events. [2021-08-12 21:45:52,360 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,360 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. [2021-08-12 21:45:52,360 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 26 transitions, 129 flow [2021-08-12 21:45:52,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 24 transitions, 125 flow [2021-08-12 21:45:52,368 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:52,368 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,368 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,369 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:52,370 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,373 INFO L82 PathProgramCache]: Analyzing trace with hash 4867, now seen corresponding path program 1 times [2021-08-12 21:45:52,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693964938] [2021-08-12 21:45:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:52,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:52,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:52,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:52,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693964938] [2021-08-12 21:45:52,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693964938] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:52,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:52,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:52,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920041817] [2021-08-12 21:45:52,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:52,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:52,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:52,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:52,389 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 26 [2021-08-12 21:45:52,390 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) [2021-08-12 21:45:52,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:52,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 26 [2021-08-12 21:45:52,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:52,404 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-08-12 21:45:52,404 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,404 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. [2021-08-12 21:45:52,404 INFO L132 encePairwiseOnDemand]: 24/26 looper letters, 0 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2021-08-12 21:45:52,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 23 transitions, 125 flow [2021-08-12 21:45:52,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2021-08-12 21:45:52,405 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9102564102564102 [2021-08-12 21:45:52,405 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 71 transitions. [2021-08-12 21:45:52,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 71 transitions. [2021-08-12 21:45:52,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:52,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 71 transitions. [2021-08-12 21:45:52,406 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) [2021-08-12 21:45:52,407 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) [2021-08-12 21:45:52,407 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) [2021-08-12 21:45:52,407 INFO L348 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2021-08-12 21:45:52,407 INFO L482 AbstractCegarLoop]: Abstraction has has 40 places, 23 transitions, 125 flow [2021-08-12 21:45:52,407 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) [2021-08-12 21:45:52,407 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,408 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:45:52,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-12 21:45:52,408 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,408 INFO L82 PathProgramCache]: Analyzing trace with hash 58177429, now seen corresponding path program 1 times [2021-08-12 21:45:52,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132441856] [2021-08-12 21:45:52,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,412 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,429 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,433 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:52,433 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:52,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-12 21:45:52,434 WARN L235 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:52,434 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2021-08-12 21:45:52,459 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:52,459 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:52,460 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:52,460 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:52,460 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:52,460 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:52,460 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:52,460 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:52,460 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:52,460 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:52,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 46 places, 29 transitions, 154 flow [2021-08-12 21:45:52,467 INFO L129 PetriNetUnfolder]: 0/53 cut-off events. [2021-08-12 21:45:52,467 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,467 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. [2021-08-12 21:45:52,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 29 transitions, 154 flow [2021-08-12 21:45:52,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 27 transitions, 150 flow [2021-08-12 21:45:52,468 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:52,469 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,469 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,469 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:52,469 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,469 INFO L82 PathProgramCache]: Analyzing trace with hash 5795, now seen corresponding path program 1 times [2021-08-12 21:45:52,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366672972] [2021-08-12 21:45:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:52,486 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:52,486 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:52,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:52,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366672972] [2021-08-12 21:45:52,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366672972] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:52,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:52,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:52,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114926459] [2021-08-12 21:45:52,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:52,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:52,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:52,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:52,490 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 29 [2021-08-12 21:45:52,491 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) [2021-08-12 21:45:52,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:52,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 29 [2021-08-12 21:45:52,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:52,496 INFO L129 PetriNetUnfolder]: 0/26 cut-off events. [2021-08-12 21:45:52,496 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,496 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. [2021-08-12 21:45:52,496 INFO L132 encePairwiseOnDemand]: 27/29 looper letters, 0 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2021-08-12 21:45:52,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 26 transitions, 150 flow [2021-08-12 21:45:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2021-08-12 21:45:52,497 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9195402298850575 [2021-08-12 21:45:52,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 80 transitions. [2021-08-12 21:45:52,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 80 transitions. [2021-08-12 21:45:52,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:52,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 80 transitions. [2021-08-12 21:45:52,508 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) [2021-08-12 21:45:52,508 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) [2021-08-12 21:45:52,508 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) [2021-08-12 21:45:52,508 INFO L348 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2021-08-12 21:45:52,508 INFO L482 AbstractCegarLoop]: Abstraction has has 45 places, 26 transitions, 150 flow [2021-08-12 21:45:52,509 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) [2021-08-12 21:45:52,509 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,509 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:45:52,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-12 21:45:52,509 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1055505844, now seen corresponding path program 1 times [2021-08-12 21:45:52,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570930508] [2021-08-12 21:45:52,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,513 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,515 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,517 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:52,517 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:52,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-12 21:45:52,517 WARN L235 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:52,517 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2021-08-12 21:45:52,527 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:52,528 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:52,528 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:52,529 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:52,529 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:52,529 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:52,529 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:52,529 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:52,529 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:52,529 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:52,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 51 places, 32 transitions, 181 flow [2021-08-12 21:45:52,537 INFO L129 PetriNetUnfolder]: 0/59 cut-off events. [2021-08-12 21:45:52,537 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,537 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. [2021-08-12 21:45:52,537 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 32 transitions, 181 flow [2021-08-12 21:45:52,538 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 30 transitions, 177 flow [2021-08-12 21:45:52,538 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:52,538 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,538 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,539 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:52,539 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,539 INFO L82 PathProgramCache]: Analyzing trace with hash 6819, now seen corresponding path program 1 times [2021-08-12 21:45:52,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49352850] [2021-08-12 21:45:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:52,543 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:52,543 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:52,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:52,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49352850] [2021-08-12 21:45:52,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49352850] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:52,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:52,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:52,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147069681] [2021-08-12 21:45:52,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:52,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:52,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:52,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:52,547 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 32 [2021-08-12 21:45:52,547 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) [2021-08-12 21:45:52,548 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:52,548 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 32 [2021-08-12 21:45:52,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:52,553 INFO L129 PetriNetUnfolder]: 0/29 cut-off events. [2021-08-12 21:45:52,553 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,553 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. [2021-08-12 21:45:52,553 INFO L132 encePairwiseOnDemand]: 30/32 looper letters, 0 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2021-08-12 21:45:52,553 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 29 transitions, 177 flow [2021-08-12 21:45:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2021-08-12 21:45:52,554 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9270833333333334 [2021-08-12 21:45:52,554 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 89 transitions. [2021-08-12 21:45:52,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 89 transitions. [2021-08-12 21:45:52,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:52,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 89 transitions. [2021-08-12 21:45:52,555 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) [2021-08-12 21:45:52,555 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) [2021-08-12 21:45:52,555 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) [2021-08-12 21:45:52,556 INFO L348 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2021-08-12 21:45:52,556 INFO L482 AbstractCegarLoop]: Abstraction has has 50 places, 29 transitions, 177 flow [2021-08-12 21:45:52,556 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) [2021-08-12 21:45:52,556 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,556 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:45:52,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-12 21:45:52,556 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1814808561, now seen corresponding path program 1 times [2021-08-12 21:45:52,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689765223] [2021-08-12 21:45:52,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,560 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,562 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,563 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:52,564 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:52,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-12 21:45:52,564 WARN L235 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:52,564 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2021-08-12 21:45:52,575 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:52,576 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:52,576 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:52,576 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:52,576 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:52,576 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:52,576 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:52,576 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:52,576 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:52,577 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:52,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 56 places, 35 transitions, 210 flow [2021-08-12 21:45:52,583 INFO L129 PetriNetUnfolder]: 0/65 cut-off events. [2021-08-12 21:45:52,583 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,583 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. [2021-08-12 21:45:52,583 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 35 transitions, 210 flow [2021-08-12 21:45:52,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 33 transitions, 206 flow [2021-08-12 21:45:52,585 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:52,585 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,585 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,585 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:52,585 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,585 INFO L82 PathProgramCache]: Analyzing trace with hash 7939, now seen corresponding path program 1 times [2021-08-12 21:45:52,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643323004] [2021-08-12 21:45:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:52,589 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:52,590 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:52,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:52,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643323004] [2021-08-12 21:45:52,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643323004] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:52,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:52,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:52,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263196601] [2021-08-12 21:45:52,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:52,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:52,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:52,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:52,593 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 35 [2021-08-12 21:45:52,594 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) [2021-08-12 21:45:52,594 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:52,594 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 35 [2021-08-12 21:45:52,594 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:52,599 INFO L129 PetriNetUnfolder]: 0/32 cut-off events. [2021-08-12 21:45:52,599 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,599 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. [2021-08-12 21:45:52,600 INFO L132 encePairwiseOnDemand]: 33/35 looper letters, 0 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2021-08-12 21:45:52,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 32 transitions, 206 flow [2021-08-12 21:45:52,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:52,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2021-08-12 21:45:52,600 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9333333333333333 [2021-08-12 21:45:52,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 98 transitions. [2021-08-12 21:45:52,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 98 transitions. [2021-08-12 21:45:52,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:52,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 98 transitions. [2021-08-12 21:45:52,601 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) [2021-08-12 21:45:52,602 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) [2021-08-12 21:45:52,602 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) [2021-08-12 21:45:52,602 INFO L348 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2021-08-12 21:45:52,602 INFO L482 AbstractCegarLoop]: Abstraction has has 55 places, 32 transitions, 206 flow [2021-08-12 21:45:52,602 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) [2021-08-12 21:45:52,602 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,602 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:45:52,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-12 21:45:52,602 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1379283255, now seen corresponding path program 1 times [2021-08-12 21:45:52,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591686630] [2021-08-12 21:45:52,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,606 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,612 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,614 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:52,614 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:52,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-12 21:45:52,614 WARN L235 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:52,614 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2021-08-12 21:45:52,648 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:52,648 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:52,649 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:52,649 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:52,649 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:52,649 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:52,649 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:52,649 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:52,649 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:52,649 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:52,650 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 61 places, 38 transitions, 241 flow [2021-08-12 21:45:52,664 INFO L129 PetriNetUnfolder]: 0/71 cut-off events. [2021-08-12 21:45:52,664 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,664 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. [2021-08-12 21:45:52,664 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 38 transitions, 241 flow [2021-08-12 21:45:52,670 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 36 transitions, 237 flow [2021-08-12 21:45:52,671 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:52,671 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,672 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,672 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:52,672 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,672 INFO L82 PathProgramCache]: Analyzing trace with hash 9155, now seen corresponding path program 1 times [2021-08-12 21:45:52,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42821369] [2021-08-12 21:45:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:52,678 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:52,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:52,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:52,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42821369] [2021-08-12 21:45:52,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42821369] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:52,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:52,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:52,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777288352] [2021-08-12 21:45:52,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:52,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:52,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:52,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:52,682 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 38 [2021-08-12 21:45:52,683 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) [2021-08-12 21:45:52,683 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:52,683 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 38 [2021-08-12 21:45:52,683 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:52,687 INFO L129 PetriNetUnfolder]: 0/35 cut-off events. [2021-08-12 21:45:52,687 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,687 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. [2021-08-12 21:45:52,690 INFO L132 encePairwiseOnDemand]: 36/38 looper letters, 0 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2021-08-12 21:45:52,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 35 transitions, 237 flow [2021-08-12 21:45:52,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:52,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2021-08-12 21:45:52,693 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9385964912280702 [2021-08-12 21:45:52,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2021-08-12 21:45:52,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2021-08-12 21:45:52,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:52,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2021-08-12 21:45:52,695 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) [2021-08-12 21:45:52,695 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) [2021-08-12 21:45:52,695 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) [2021-08-12 21:45:52,695 INFO L348 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2021-08-12 21:45:52,695 INFO L482 AbstractCegarLoop]: Abstraction has has 60 places, 35 transitions, 237 flow [2021-08-12 21:45:52,695 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) [2021-08-12 21:45:52,695 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,695 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:45:52,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-12 21:45:52,696 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,696 INFO L82 PathProgramCache]: Analyzing trace with hash -279163623, now seen corresponding path program 1 times [2021-08-12 21:45:52,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269496918] [2021-08-12 21:45:52,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,706 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,708 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,710 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:52,710 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:52,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-12 21:45:52,710 WARN L235 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:52,710 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2021-08-12 21:45:52,729 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:52,730 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:52,730 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:52,730 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:52,730 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:52,730 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:52,730 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:52,730 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:52,730 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:52,731 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:52,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 41 transitions, 274 flow [2021-08-12 21:45:52,740 INFO L129 PetriNetUnfolder]: 0/77 cut-off events. [2021-08-12 21:45:52,740 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,740 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. [2021-08-12 21:45:52,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 41 transitions, 274 flow [2021-08-12 21:45:52,741 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 39 transitions, 270 flow [2021-08-12 21:45:52,742 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:52,743 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,743 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,743 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:52,743 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,744 INFO L82 PathProgramCache]: Analyzing trace with hash 10467, now seen corresponding path program 1 times [2021-08-12 21:45:52,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269525569] [2021-08-12 21:45:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:52,757 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:52,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:52,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:52,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269525569] [2021-08-12 21:45:52,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269525569] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:52,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:52,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:52,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040570386] [2021-08-12 21:45:52,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:52,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:52,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:52,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:52,761 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 41 [2021-08-12 21:45:52,762 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) [2021-08-12 21:45:52,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:52,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 41 [2021-08-12 21:45:52,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:52,772 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-08-12 21:45:52,772 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,772 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. [2021-08-12 21:45:52,773 INFO L132 encePairwiseOnDemand]: 39/41 looper letters, 0 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2021-08-12 21:45:52,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 38 transitions, 270 flow [2021-08-12 21:45:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:52,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2021-08-12 21:45:52,773 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.943089430894309 [2021-08-12 21:45:52,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 116 transitions. [2021-08-12 21:45:52,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 116 transitions. [2021-08-12 21:45:52,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:52,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 116 transitions. [2021-08-12 21:45:52,774 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) [2021-08-12 21:45:52,775 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) [2021-08-12 21:45:52,775 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) [2021-08-12 21:45:52,775 INFO L348 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2021-08-12 21:45:52,775 INFO L482 AbstractCegarLoop]: Abstraction has has 65 places, 38 transitions, 270 flow [2021-08-12 21:45:52,775 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) [2021-08-12 21:45:52,775 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,775 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:45:52,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-12 21:45:52,776 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,776 INFO L82 PathProgramCache]: Analyzing trace with hash 387658490, now seen corresponding path program 1 times [2021-08-12 21:45:52,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077950445] [2021-08-12 21:45:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,787 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,789 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,790 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:52,790 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:52,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-12 21:45:52,791 WARN L235 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:52,791 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2021-08-12 21:45:52,821 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:52,821 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:52,821 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:52,822 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:52,822 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:52,822 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:52,822 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:52,822 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:52,822 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:52,822 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:52,825 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 71 places, 44 transitions, 309 flow [2021-08-12 21:45:52,830 INFO L129 PetriNetUnfolder]: 0/83 cut-off events. [2021-08-12 21:45:52,831 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,831 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. [2021-08-12 21:45:52,831 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 44 transitions, 309 flow [2021-08-12 21:45:52,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 42 transitions, 305 flow [2021-08-12 21:45:52,832 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:52,832 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,832 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,832 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:52,832 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,832 INFO L82 PathProgramCache]: Analyzing trace with hash 11875, now seen corresponding path program 1 times [2021-08-12 21:45:52,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819943690] [2021-08-12 21:45:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:52,839 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:52,840 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:52,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:52,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819943690] [2021-08-12 21:45:52,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819943690] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:52,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:52,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:52,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223800343] [2021-08-12 21:45:52,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:52,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:52,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:52,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:52,844 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 44 [2021-08-12 21:45:52,844 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) [2021-08-12 21:45:52,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:52,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 44 [2021-08-12 21:45:52,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:52,855 INFO L129 PetriNetUnfolder]: 0/41 cut-off events. [2021-08-12 21:45:52,855 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,855 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. [2021-08-12 21:45:52,855 INFO L132 encePairwiseOnDemand]: 42/44 looper letters, 0 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2021-08-12 21:45:52,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 41 transitions, 305 flow [2021-08-12 21:45:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:52,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2021-08-12 21:45:52,856 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.946969696969697 [2021-08-12 21:45:52,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2021-08-12 21:45:52,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2021-08-12 21:45:52,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:52,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2021-08-12 21:45:52,858 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) [2021-08-12 21:45:52,859 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) [2021-08-12 21:45:52,859 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) [2021-08-12 21:45:52,860 INFO L348 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2021-08-12 21:45:52,860 INFO L482 AbstractCegarLoop]: Abstraction has has 70 places, 41 transitions, 305 flow [2021-08-12 21:45:52,860 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) [2021-08-12 21:45:52,860 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,861 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:45:52,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-12 21:45:52,861 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,862 INFO L82 PathProgramCache]: Analyzing trace with hash -656774515, now seen corresponding path program 1 times [2021-08-12 21:45:52,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894263804] [2021-08-12 21:45:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,877 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,879 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,881 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:52,882 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:52,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-12 21:45:52,882 WARN L235 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:52,882 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2021-08-12 21:45:52,914 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:52,915 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:52,918 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:52,918 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:52,919 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:52,919 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:52,919 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:52,919 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:52,919 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:52,919 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:52,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 76 places, 47 transitions, 346 flow [2021-08-12 21:45:52,928 INFO L129 PetriNetUnfolder]: 0/89 cut-off events. [2021-08-12 21:45:52,928 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,932 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. [2021-08-12 21:45:52,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 47 transitions, 346 flow [2021-08-12 21:45:52,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 45 transitions, 342 flow [2021-08-12 21:45:52,933 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:52,933 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,934 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,934 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:52,934 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,934 INFO L82 PathProgramCache]: Analyzing trace with hash 13379, now seen corresponding path program 1 times [2021-08-12 21:45:52,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747123280] [2021-08-12 21:45:52,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:52,941 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:52,941 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:52,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:52,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747123280] [2021-08-12 21:45:52,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747123280] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:52,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:52,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:52,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089680366] [2021-08-12 21:45:52,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:52,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:52,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:52,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:52,946 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 47 [2021-08-12 21:45:52,946 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) [2021-08-12 21:45:52,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:52,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 47 [2021-08-12 21:45:52,946 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:52,952 INFO L129 PetriNetUnfolder]: 0/44 cut-off events. [2021-08-12 21:45:52,953 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:52,953 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. [2021-08-12 21:45:52,953 INFO L132 encePairwiseOnDemand]: 45/47 looper letters, 0 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2021-08-12 21:45:52,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 44 transitions, 342 flow [2021-08-12 21:45:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2021-08-12 21:45:52,954 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.950354609929078 [2021-08-12 21:45:52,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 134 transitions. [2021-08-12 21:45:52,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 134 transitions. [2021-08-12 21:45:52,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:52,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 134 transitions. [2021-08-12 21:45:52,967 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) [2021-08-12 21:45:52,968 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) [2021-08-12 21:45:52,968 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) [2021-08-12 21:45:52,968 INFO L348 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2021-08-12 21:45:52,968 INFO L482 AbstractCegarLoop]: Abstraction has has 75 places, 44 transitions, 342 flow [2021-08-12 21:45:52,969 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) [2021-08-12 21:45:52,969 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:52,969 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:45:52,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-12 21:45:52,969 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:52,969 INFO L82 PathProgramCache]: Analyzing trace with hash 910327677, now seen corresponding path program 1 times [2021-08-12 21:45:52,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:52,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744673022] [2021-08-12 21:45:52,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,984 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:52,986 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:52,988 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:52,988 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:52,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-12 21:45:52,989 WARN L235 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:52,989 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2021-08-12 21:45:53,012 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:53,012 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:53,013 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:53,013 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:53,013 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:53,013 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:53,013 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:53,013 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:53,013 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:53,013 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:53,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 81 places, 50 transitions, 385 flow [2021-08-12 21:45:53,024 INFO L129 PetriNetUnfolder]: 0/95 cut-off events. [2021-08-12 21:45:53,024 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,025 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. [2021-08-12 21:45:53,025 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 50 transitions, 385 flow [2021-08-12 21:45:53,026 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 48 transitions, 381 flow [2021-08-12 21:45:53,029 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:53,029 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,029 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,029 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:53,030 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,030 INFO L82 PathProgramCache]: Analyzing trace with hash 14979, now seen corresponding path program 1 times [2021-08-12 21:45:53,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609633370] [2021-08-12 21:45:53,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:53,041 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:53,041 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:53,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:53,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609633370] [2021-08-12 21:45:53,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609633370] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:53,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:53,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:53,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181385469] [2021-08-12 21:45:53,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:53,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:53,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:53,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:53,045 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 50 [2021-08-12 21:45:53,045 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) [2021-08-12 21:45:53,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:53,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 50 [2021-08-12 21:45:53,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:53,056 INFO L129 PetriNetUnfolder]: 0/47 cut-off events. [2021-08-12 21:45:53,056 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,056 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. [2021-08-12 21:45:53,057 INFO L132 encePairwiseOnDemand]: 48/50 looper letters, 0 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2021-08-12 21:45:53,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 47 transitions, 381 flow [2021-08-12 21:45:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:53,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2021-08-12 21:45:53,058 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9533333333333334 [2021-08-12 21:45:53,058 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2021-08-12 21:45:53,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2021-08-12 21:45:53,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:53,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2021-08-12 21:45:53,058 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) [2021-08-12 21:45:53,059 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) [2021-08-12 21:45:53,059 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) [2021-08-12 21:45:53,059 INFO L348 CegarLoopForPetriNet]: 79 programPoint places, 1 predicate places. [2021-08-12 21:45:53,059 INFO L482 AbstractCegarLoop]: Abstraction has has 80 places, 47 transitions, 381 flow [2021-08-12 21:45:53,059 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) [2021-08-12 21:45:53,059 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,059 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:45:53,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-12 21:45:53,060 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,060 INFO L82 PathProgramCache]: Analyzing trace with hash 2024113101, now seen corresponding path program 1 times [2021-08-12 21:45:53,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286391294] [2021-08-12 21:45:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,075 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,084 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,087 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:53,087 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:53,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-12 21:45:53,087 WARN L235 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:53,087 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2021-08-12 21:45:53,123 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:53,123 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:53,124 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:53,124 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:53,124 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:53,124 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:53,125 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:53,125 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:53,125 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:53,125 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:53,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 86 places, 53 transitions, 426 flow [2021-08-12 21:45:53,135 INFO L129 PetriNetUnfolder]: 0/101 cut-off events. [2021-08-12 21:45:53,135 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,135 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. [2021-08-12 21:45:53,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 53 transitions, 426 flow [2021-08-12 21:45:53,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 51 transitions, 422 flow [2021-08-12 21:45:53,139 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:53,139 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,139 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,139 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:53,139 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,139 INFO L82 PathProgramCache]: Analyzing trace with hash 16675, now seen corresponding path program 1 times [2021-08-12 21:45:53,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614610383] [2021-08-12 21:45:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:53,144 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:53,144 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:53,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:53,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614610383] [2021-08-12 21:45:53,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614610383] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:53,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:53,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:53,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123427702] [2021-08-12 21:45:53,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:53,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:53,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:53,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:53,160 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 53 [2021-08-12 21:45:53,161 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) [2021-08-12 21:45:53,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:53,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 53 [2021-08-12 21:45:53,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:53,167 INFO L129 PetriNetUnfolder]: 0/50 cut-off events. [2021-08-12 21:45:53,167 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,167 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. [2021-08-12 21:45:53,168 INFO L132 encePairwiseOnDemand]: 51/53 looper letters, 0 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2021-08-12 21:45:53,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 50 transitions, 422 flow [2021-08-12 21:45:53,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2021-08-12 21:45:53,168 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9559748427672956 [2021-08-12 21:45:53,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 152 transitions. [2021-08-12 21:45:53,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 152 transitions. [2021-08-12 21:45:53,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:53,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 152 transitions. [2021-08-12 21:45:53,169 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) [2021-08-12 21:45:53,170 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) [2021-08-12 21:45:53,170 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) [2021-08-12 21:45:53,170 INFO L348 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2021-08-12 21:45:53,170 INFO L482 AbstractCegarLoop]: Abstraction has has 85 places, 50 transitions, 422 flow [2021-08-12 21:45:53,170 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) [2021-08-12 21:45:53,170 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,170 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:45:53,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-12 21:45:53,185 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,185 INFO L82 PathProgramCache]: Analyzing trace with hash 916427584, now seen corresponding path program 1 times [2021-08-12 21:45:53,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032030309] [2021-08-12 21:45:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,189 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,191 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,193 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:53,193 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:53,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-12 21:45:53,194 WARN L235 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:53,194 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2021-08-12 21:45:53,237 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:53,237 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:53,238 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:53,238 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:53,238 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:53,238 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:53,238 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:53,238 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:53,238 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:53,238 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:53,239 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 91 places, 56 transitions, 469 flow [2021-08-12 21:45:53,247 INFO L129 PetriNetUnfolder]: 0/107 cut-off events. [2021-08-12 21:45:53,247 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,247 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. [2021-08-12 21:45:53,247 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 56 transitions, 469 flow [2021-08-12 21:45:53,248 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 54 transitions, 465 flow [2021-08-12 21:45:53,248 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:53,248 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,248 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,248 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:53,249 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,249 INFO L82 PathProgramCache]: Analyzing trace with hash 18467, now seen corresponding path program 1 times [2021-08-12 21:45:53,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553681152] [2021-08-12 21:45:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:53,269 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:53,270 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:53,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:53,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553681152] [2021-08-12 21:45:53,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553681152] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:53,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:53,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:53,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343139675] [2021-08-12 21:45:53,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:53,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:53,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:53,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:53,274 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 56 [2021-08-12 21:45:53,274 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) [2021-08-12 21:45:53,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:53,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 56 [2021-08-12 21:45:53,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:53,281 INFO L129 PetriNetUnfolder]: 0/53 cut-off events. [2021-08-12 21:45:53,281 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,281 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. [2021-08-12 21:45:53,281 INFO L132 encePairwiseOnDemand]: 54/56 looper letters, 0 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2021-08-12 21:45:53,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 53 transitions, 465 flow [2021-08-12 21:45:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2021-08-12 21:45:53,282 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9583333333333334 [2021-08-12 21:45:53,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2021-08-12 21:45:53,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2021-08-12 21:45:53,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:53,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2021-08-12 21:45:53,283 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) [2021-08-12 21:45:53,283 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) [2021-08-12 21:45:53,283 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) [2021-08-12 21:45:53,283 INFO L348 CegarLoopForPetriNet]: 89 programPoint places, 1 predicate places. [2021-08-12 21:45:53,283 INFO L482 AbstractCegarLoop]: Abstraction has has 90 places, 53 transitions, 465 flow [2021-08-12 21:45:53,283 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) [2021-08-12 21:45:53,283 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,284 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:45:53,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-12 21:45:53,284 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1820015705, now seen corresponding path program 1 times [2021-08-12 21:45:53,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530319589] [2021-08-12 21:45:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,292 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,294 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,310 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:53,310 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:53,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-08-12 21:45:53,310 WARN L235 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:53,310 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2021-08-12 21:45:53,351 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:53,351 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:53,352 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:53,352 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:53,352 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:53,352 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:53,352 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:53,352 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:53,352 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:53,352 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:53,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 59 transitions, 514 flow [2021-08-12 21:45:53,363 INFO L129 PetriNetUnfolder]: 0/113 cut-off events. [2021-08-12 21:45:53,363 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,363 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. [2021-08-12 21:45:53,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 59 transitions, 514 flow [2021-08-12 21:45:53,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 57 transitions, 510 flow [2021-08-12 21:45:53,365 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:53,365 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,365 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,365 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:53,365 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,365 INFO L82 PathProgramCache]: Analyzing trace with hash 20355, now seen corresponding path program 1 times [2021-08-12 21:45:53,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109708463] [2021-08-12 21:45:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:53,387 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:53,387 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:53,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:53,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109708463] [2021-08-12 21:45:53,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109708463] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:53,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:53,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:53,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125822342] [2021-08-12 21:45:53,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:53,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:53,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:53,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:53,391 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 59 [2021-08-12 21:45:53,392 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) [2021-08-12 21:45:53,392 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:53,392 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 59 [2021-08-12 21:45:53,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:53,400 INFO L129 PetriNetUnfolder]: 0/56 cut-off events. [2021-08-12 21:45:53,400 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,400 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. [2021-08-12 21:45:53,400 INFO L132 encePairwiseOnDemand]: 57/59 looper letters, 0 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2021-08-12 21:45:53,400 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 56 transitions, 510 flow [2021-08-12 21:45:53,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:53,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2021-08-12 21:45:53,401 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.96045197740113 [2021-08-12 21:45:53,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 170 transitions. [2021-08-12 21:45:53,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 170 transitions. [2021-08-12 21:45:53,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:53,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 170 transitions. [2021-08-12 21:45:53,402 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) [2021-08-12 21:45:53,402 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) [2021-08-12 21:45:53,402 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) [2021-08-12 21:45:53,402 INFO L348 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2021-08-12 21:45:53,402 INFO L482 AbstractCegarLoop]: Abstraction has has 95 places, 56 transitions, 510 flow [2021-08-12 21:45:53,402 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) [2021-08-12 21:45:53,402 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,402 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] [2021-08-12 21:45:53,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-08-12 21:45:53,403 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,403 INFO L82 PathProgramCache]: Analyzing trace with hash 115321539, now seen corresponding path program 1 times [2021-08-12 21:45:53,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041472068] [2021-08-12 21:45:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,423 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,425 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,427 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:53,427 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:53,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-08-12 21:45:53,441 WARN L235 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:53,441 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2021-08-12 21:45:53,475 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:53,475 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:53,476 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:53,476 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:53,476 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:53,476 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:53,476 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:53,476 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:53,476 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:53,476 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:53,477 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 101 places, 62 transitions, 561 flow [2021-08-12 21:45:53,486 INFO L129 PetriNetUnfolder]: 0/119 cut-off events. [2021-08-12 21:45:53,486 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,486 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. [2021-08-12 21:45:53,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 62 transitions, 561 flow [2021-08-12 21:45:53,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 60 transitions, 557 flow [2021-08-12 21:45:53,487 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:53,487 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,487 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,487 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:53,488 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,488 INFO L82 PathProgramCache]: Analyzing trace with hash 22339, now seen corresponding path program 1 times [2021-08-12 21:45:53,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820223434] [2021-08-12 21:45:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:53,509 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:53,509 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:53,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:53,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820223434] [2021-08-12 21:45:53,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820223434] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:53,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:53,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:53,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146696598] [2021-08-12 21:45:53,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:53,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:53,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:53,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:53,512 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 62 [2021-08-12 21:45:53,512 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) [2021-08-12 21:45:53,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:53,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 62 [2021-08-12 21:45:53,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:53,519 INFO L129 PetriNetUnfolder]: 0/59 cut-off events. [2021-08-12 21:45:53,519 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,519 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. [2021-08-12 21:45:53,519 INFO L132 encePairwiseOnDemand]: 60/62 looper letters, 0 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2021-08-12 21:45:53,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 59 transitions, 557 flow [2021-08-12 21:45:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:53,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:53,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2021-08-12 21:45:53,520 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9623655913978495 [2021-08-12 21:45:53,520 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 179 transitions. [2021-08-12 21:45:53,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 179 transitions. [2021-08-12 21:45:53,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:53,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 179 transitions. [2021-08-12 21:45:53,521 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) [2021-08-12 21:45:53,521 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) [2021-08-12 21:45:53,521 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) [2021-08-12 21:45:53,521 INFO L348 CegarLoopForPetriNet]: 99 programPoint places, 1 predicate places. [2021-08-12 21:45:53,521 INFO L482 AbstractCegarLoop]: Abstraction has has 100 places, 59 transitions, 557 flow [2021-08-12 21:45:53,521 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) [2021-08-12 21:45:53,521 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,521 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] [2021-08-12 21:45:53,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-08-12 21:45:53,522 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1667725233, now seen corresponding path program 1 times [2021-08-12 21:45:53,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550612976] [2021-08-12 21:45:53,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,542 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,543 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,546 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:53,546 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:53,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-12 21:45:53,546 WARN L235 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:53,546 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2021-08-12 21:45:53,580 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:53,580 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:53,581 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:53,581 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:53,581 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:53,581 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:53,581 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:53,581 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:53,581 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:53,581 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:53,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 106 places, 65 transitions, 610 flow [2021-08-12 21:45:53,589 INFO L129 PetriNetUnfolder]: 0/125 cut-off events. [2021-08-12 21:45:53,590 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,590 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. [2021-08-12 21:45:53,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 65 transitions, 610 flow [2021-08-12 21:45:53,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 63 transitions, 606 flow [2021-08-12 21:45:53,591 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:53,591 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,591 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,591 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:53,591 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,591 INFO L82 PathProgramCache]: Analyzing trace with hash 24419, now seen corresponding path program 1 times [2021-08-12 21:45:53,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127845207] [2021-08-12 21:45:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:53,625 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:53,625 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:53,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:53,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127845207] [2021-08-12 21:45:53,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127845207] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:53,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:53,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:53,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623319908] [2021-08-12 21:45:53,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:53,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:53,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:53,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:53,628 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 65 [2021-08-12 21:45:53,628 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) [2021-08-12 21:45:53,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:53,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 65 [2021-08-12 21:45:53,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:53,635 INFO L129 PetriNetUnfolder]: 0/62 cut-off events. [2021-08-12 21:45:53,635 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,636 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. [2021-08-12 21:45:53,636 INFO L132 encePairwiseOnDemand]: 63/65 looper letters, 0 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2021-08-12 21:45:53,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 62 transitions, 606 flow [2021-08-12 21:45:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:53,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2021-08-12 21:45:53,636 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9641025641025641 [2021-08-12 21:45:53,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2021-08-12 21:45:53,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2021-08-12 21:45:53,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:53,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2021-08-12 21:45:53,637 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) [2021-08-12 21:45:53,637 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) [2021-08-12 21:45:53,638 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) [2021-08-12 21:45:53,638 INFO L348 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2021-08-12 21:45:53,638 INFO L482 AbstractCegarLoop]: Abstraction has has 105 places, 62 transitions, 606 flow [2021-08-12 21:45:53,638 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) [2021-08-12 21:45:53,638 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,638 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] [2021-08-12 21:45:53,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-08-12 21:45:53,638 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,638 INFO L82 PathProgramCache]: Analyzing trace with hash -858144122, now seen corresponding path program 1 times [2021-08-12 21:45:53,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300651180] [2021-08-12 21:45:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,662 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,663 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,666 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:53,666 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:53,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-08-12 21:45:53,666 WARN L235 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:53,666 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2021-08-12 21:45:53,702 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:53,702 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:53,702 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:53,702 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:53,702 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:53,703 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:53,703 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:53,703 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:53,703 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:53,703 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:53,703 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 111 places, 68 transitions, 661 flow [2021-08-12 21:45:53,712 INFO L129 PetriNetUnfolder]: 0/131 cut-off events. [2021-08-12 21:45:53,712 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,712 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. [2021-08-12 21:45:53,712 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 68 transitions, 661 flow [2021-08-12 21:45:53,713 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 66 transitions, 657 flow [2021-08-12 21:45:53,713 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:53,713 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,713 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,713 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:53,714 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,714 INFO L82 PathProgramCache]: Analyzing trace with hash 26595, now seen corresponding path program 1 times [2021-08-12 21:45:53,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982590068] [2021-08-12 21:45:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:53,734 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:53,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:53,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:53,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982590068] [2021-08-12 21:45:53,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982590068] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:53,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:53,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:53,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165871422] [2021-08-12 21:45:53,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:53,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:53,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:53,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:53,738 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 68 [2021-08-12 21:45:53,738 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) [2021-08-12 21:45:53,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:53,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 68 [2021-08-12 21:45:53,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:53,746 INFO L129 PetriNetUnfolder]: 0/65 cut-off events. [2021-08-12 21:45:53,746 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,746 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. [2021-08-12 21:45:53,746 INFO L132 encePairwiseOnDemand]: 66/68 looper letters, 0 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2021-08-12 21:45:53,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 65 transitions, 657 flow [2021-08-12 21:45:53,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:53,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2021-08-12 21:45:53,747 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9656862745098039 [2021-08-12 21:45:53,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2021-08-12 21:45:53,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2021-08-12 21:45:53,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:53,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2021-08-12 21:45:53,747 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) [2021-08-12 21:45:53,748 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) [2021-08-12 21:45:53,748 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) [2021-08-12 21:45:53,748 INFO L348 CegarLoopForPetriNet]: 109 programPoint places, 1 predicate places. [2021-08-12 21:45:53,748 INFO L482 AbstractCegarLoop]: Abstraction has has 110 places, 65 transitions, 657 flow [2021-08-12 21:45:53,748 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) [2021-08-12 21:45:53,748 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,748 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] [2021-08-12 21:45:53,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-08-12 21:45:53,748 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,749 INFO L82 PathProgramCache]: Analyzing trace with hash -615229099, now seen corresponding path program 1 times [2021-08-12 21:45:53,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860574159] [2021-08-12 21:45:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,769 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,770 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,773 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:53,773 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:53,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-08-12 21:45:53,788 WARN L235 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:53,789 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2021-08-12 21:45:53,822 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:53,822 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:53,823 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:53,823 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:53,823 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:53,823 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:53,823 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:53,823 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:53,823 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:53,823 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:53,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 116 places, 71 transitions, 714 flow [2021-08-12 21:45:53,833 INFO L129 PetriNetUnfolder]: 0/137 cut-off events. [2021-08-12 21:45:53,833 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,833 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. [2021-08-12 21:45:53,833 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 71 transitions, 714 flow [2021-08-12 21:45:53,834 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 69 transitions, 710 flow [2021-08-12 21:45:53,834 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:53,834 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,834 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,834 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:53,834 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,835 INFO L82 PathProgramCache]: Analyzing trace with hash 28867, now seen corresponding path program 1 times [2021-08-12 21:45:53,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088233380] [2021-08-12 21:45:53,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:53,855 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:53,856 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:53,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:53,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088233380] [2021-08-12 21:45:53,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088233380] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:53,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:53,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:53,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837245524] [2021-08-12 21:45:53,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:53,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:53,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:53,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:53,859 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 71 [2021-08-12 21:45:53,859 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) [2021-08-12 21:45:53,859 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:53,859 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 71 [2021-08-12 21:45:53,859 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:53,867 INFO L129 PetriNetUnfolder]: 0/68 cut-off events. [2021-08-12 21:45:53,867 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,867 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. [2021-08-12 21:45:53,867 INFO L132 encePairwiseOnDemand]: 69/71 looper letters, 0 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2021-08-12 21:45:53,868 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 68 transitions, 710 flow [2021-08-12 21:45:53,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:53,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:53,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2021-08-12 21:45:53,868 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9671361502347418 [2021-08-12 21:45:53,868 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2021-08-12 21:45:53,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2021-08-12 21:45:53,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:53,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2021-08-12 21:45:53,869 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) [2021-08-12 21:45:53,869 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) [2021-08-12 21:45:53,869 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) [2021-08-12 21:45:53,869 INFO L348 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2021-08-12 21:45:53,869 INFO L482 AbstractCegarLoop]: Abstraction has has 115 places, 68 transitions, 710 flow [2021-08-12 21:45:53,869 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) [2021-08-12 21:45:53,869 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,869 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] [2021-08-12 21:45:53,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-08-12 21:45:53,870 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2063505161, now seen corresponding path program 1 times [2021-08-12 21:45:53,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701754541] [2021-08-12 21:45:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,890 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:53,891 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:53,894 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:53,894 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:53,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-08-12 21:45:53,894 WARN L235 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:53,894 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2021-08-12 21:45:53,942 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:53,942 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:53,942 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:53,942 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:53,943 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:53,943 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:53,943 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:53,943 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:53,943 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:53,943 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:53,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 121 places, 74 transitions, 769 flow [2021-08-12 21:45:53,954 INFO L129 PetriNetUnfolder]: 0/143 cut-off events. [2021-08-12 21:45:53,954 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,954 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. [2021-08-12 21:45:53,954 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 74 transitions, 769 flow [2021-08-12 21:45:53,955 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 72 transitions, 765 flow [2021-08-12 21:45:53,955 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:53,955 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,955 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,955 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:53,955 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:53,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:53,955 INFO L82 PathProgramCache]: Analyzing trace with hash 31235, now seen corresponding path program 1 times [2021-08-12 21:45:53,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:53,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183939277] [2021-08-12 21:45:53,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:53,985 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:53,985 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:53,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:53,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183939277] [2021-08-12 21:45:53,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183939277] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:53,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:53,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:53,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504585986] [2021-08-12 21:45:53,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:53,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:53,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:53,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:53,988 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 74 [2021-08-12 21:45:53,989 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) [2021-08-12 21:45:53,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:53,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 74 [2021-08-12 21:45:53,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:53,997 INFO L129 PetriNetUnfolder]: 0/71 cut-off events. [2021-08-12 21:45:53,997 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:53,997 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. [2021-08-12 21:45:53,997 INFO L132 encePairwiseOnDemand]: 72/74 looper letters, 0 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2021-08-12 21:45:53,997 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 71 transitions, 765 flow [2021-08-12 21:45:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:53,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:53,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2021-08-12 21:45:53,998 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9684684684684685 [2021-08-12 21:45:53,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2021-08-12 21:45:53,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2021-08-12 21:45:53,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:53,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2021-08-12 21:45:53,999 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) [2021-08-12 21:45:53,999 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) [2021-08-12 21:45:53,999 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) [2021-08-12 21:45:53,999 INFO L348 CegarLoopForPetriNet]: 119 programPoint places, 1 predicate places. [2021-08-12 21:45:53,999 INFO L482 AbstractCegarLoop]: Abstraction has has 120 places, 71 transitions, 765 flow [2021-08-12 21:45:53,999 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) [2021-08-12 21:45:53,999 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:53,999 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] [2021-08-12 21:45:53,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-08-12 21:45:53,999 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1486505157, now seen corresponding path program 1 times [2021-08-12 21:45:54,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028102032] [2021-08-12 21:45:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,020 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,021 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,024 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:54,024 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:54,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-08-12 21:45:54,024 WARN L235 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:54,024 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2021-08-12 21:45:54,057 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:54,058 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:54,058 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:54,058 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:54,058 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:54,058 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:54,058 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:54,058 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:54,058 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:54,058 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:54,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 126 places, 77 transitions, 826 flow [2021-08-12 21:45:54,069 INFO L129 PetriNetUnfolder]: 0/149 cut-off events. [2021-08-12 21:45:54,070 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,070 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. [2021-08-12 21:45:54,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 77 transitions, 826 flow [2021-08-12 21:45:54,070 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 75 transitions, 822 flow [2021-08-12 21:45:54,071 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:54,071 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,071 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,071 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:54,071 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,071 INFO L82 PathProgramCache]: Analyzing trace with hash 33699, now seen corresponding path program 1 times [2021-08-12 21:45:54,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247303913] [2021-08-12 21:45:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:54,105 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:54,105 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:54,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:54,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247303913] [2021-08-12 21:45:54,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247303913] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:54,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:54,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:54,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75967733] [2021-08-12 21:45:54,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:54,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:54,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:54,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:54,109 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 77 [2021-08-12 21:45:54,109 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) [2021-08-12 21:45:54,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:54,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 77 [2021-08-12 21:45:54,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:54,118 INFO L129 PetriNetUnfolder]: 0/74 cut-off events. [2021-08-12 21:45:54,118 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,118 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. [2021-08-12 21:45:54,118 INFO L132 encePairwiseOnDemand]: 75/77 looper letters, 0 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2021-08-12 21:45:54,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 74 transitions, 822 flow [2021-08-12 21:45:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:54,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2021-08-12 21:45:54,119 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9696969696969697 [2021-08-12 21:45:54,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2021-08-12 21:45:54,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2021-08-12 21:45:54,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:54,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2021-08-12 21:45:54,120 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) [2021-08-12 21:45:54,120 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) [2021-08-12 21:45:54,120 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) [2021-08-12 21:45:54,120 INFO L348 CegarLoopForPetriNet]: 124 programPoint places, 1 predicate places. [2021-08-12 21:45:54,120 INFO L482 AbstractCegarLoop]: Abstraction has has 125 places, 74 transitions, 822 flow [2021-08-12 21:45:54,136 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) [2021-08-12 21:45:54,137 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,137 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] [2021-08-12 21:45:54,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-08-12 21:45:54,137 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1412913972, now seen corresponding path program 1 times [2021-08-12 21:45:54,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877786655] [2021-08-12 21:45:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,141 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,143 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,145 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:54,146 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:54,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-08-12 21:45:54,146 WARN L235 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:54,146 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2021-08-12 21:45:54,191 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:54,191 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:54,192 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:54,192 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:54,192 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:54,192 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:54,192 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:54,192 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:54,192 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:54,192 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:54,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 131 places, 80 transitions, 885 flow [2021-08-12 21:45:54,225 INFO L129 PetriNetUnfolder]: 0/155 cut-off events. [2021-08-12 21:45:54,225 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,225 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. [2021-08-12 21:45:54,225 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 80 transitions, 885 flow [2021-08-12 21:45:54,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 78 transitions, 881 flow [2021-08-12 21:45:54,226 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:54,226 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,226 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,226 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:54,227 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,227 INFO L82 PathProgramCache]: Analyzing trace with hash 36259, now seen corresponding path program 1 times [2021-08-12 21:45:54,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997647766] [2021-08-12 21:45:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:54,245 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:54,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:54,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:54,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997647766] [2021-08-12 21:45:54,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997647766] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:54,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:54,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:54,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020816160] [2021-08-12 21:45:54,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:54,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:54,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:54,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:54,249 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 80 [2021-08-12 21:45:54,249 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) [2021-08-12 21:45:54,249 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:54,249 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 80 [2021-08-12 21:45:54,249 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:54,258 INFO L129 PetriNetUnfolder]: 0/77 cut-off events. [2021-08-12 21:45:54,259 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,259 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. [2021-08-12 21:45:54,259 INFO L132 encePairwiseOnDemand]: 78/80 looper letters, 0 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2021-08-12 21:45:54,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 77 transitions, 881 flow [2021-08-12 21:45:54,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2021-08-12 21:45:54,260 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9708333333333333 [2021-08-12 21:45:54,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2021-08-12 21:45:54,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2021-08-12 21:45:54,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:54,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2021-08-12 21:45:54,271 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) [2021-08-12 21:45:54,271 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) [2021-08-12 21:45:54,272 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) [2021-08-12 21:45:54,272 INFO L348 CegarLoopForPetriNet]: 129 programPoint places, 1 predicate places. [2021-08-12 21:45:54,272 INFO L482 AbstractCegarLoop]: Abstraction has has 130 places, 77 transitions, 881 flow [2021-08-12 21:45:54,272 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) [2021-08-12 21:45:54,272 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,272 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] [2021-08-12 21:45:54,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-08-12 21:45:54,272 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1752179327, now seen corresponding path program 1 times [2021-08-12 21:45:54,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018593224] [2021-08-12 21:45:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,277 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,278 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,281 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:54,281 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:54,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-08-12 21:45:54,282 WARN L235 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:54,282 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2021-08-12 21:45:54,330 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:54,331 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:54,331 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:54,331 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:54,331 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:54,331 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:54,331 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:54,331 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:54,331 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:54,331 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:54,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 136 places, 83 transitions, 946 flow [2021-08-12 21:45:54,343 INFO L129 PetriNetUnfolder]: 0/161 cut-off events. [2021-08-12 21:45:54,344 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,344 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. [2021-08-12 21:45:54,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 83 transitions, 946 flow [2021-08-12 21:45:54,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 81 transitions, 942 flow [2021-08-12 21:45:54,362 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:54,362 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,362 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,362 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:54,362 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,362 INFO L82 PathProgramCache]: Analyzing trace with hash 38915, now seen corresponding path program 1 times [2021-08-12 21:45:54,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037239921] [2021-08-12 21:45:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:54,369 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:54,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:54,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:54,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037239921] [2021-08-12 21:45:54,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037239921] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:54,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:54,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:54,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361383216] [2021-08-12 21:45:54,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:54,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:54,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:54,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:54,372 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 83 [2021-08-12 21:45:54,373 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) [2021-08-12 21:45:54,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:54,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 83 [2021-08-12 21:45:54,373 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:54,383 INFO L129 PetriNetUnfolder]: 0/80 cut-off events. [2021-08-12 21:45:54,383 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,383 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. [2021-08-12 21:45:54,384 INFO L132 encePairwiseOnDemand]: 81/83 looper letters, 0 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2021-08-12 21:45:54,384 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 80 transitions, 942 flow [2021-08-12 21:45:54,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:54,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2021-08-12 21:45:54,386 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9718875502008032 [2021-08-12 21:45:54,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2021-08-12 21:45:54,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2021-08-12 21:45:54,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:54,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2021-08-12 21:45:54,387 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) [2021-08-12 21:45:54,388 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) [2021-08-12 21:45:54,388 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) [2021-08-12 21:45:54,388 INFO L348 CegarLoopForPetriNet]: 134 programPoint places, 1 predicate places. [2021-08-12 21:45:54,388 INFO L482 AbstractCegarLoop]: Abstraction has has 135 places, 80 transitions, 942 flow [2021-08-12 21:45:54,388 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) [2021-08-12 21:45:54,388 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,388 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] [2021-08-12 21:45:54,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-08-12 21:45:54,389 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1126967375, now seen corresponding path program 1 times [2021-08-12 21:45:54,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428409313] [2021-08-12 21:45:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,395 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,426 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,431 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:54,431 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:54,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-08-12 21:45:54,432 WARN L235 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:54,432 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2021-08-12 21:45:54,456 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:54,456 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:54,457 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:54,457 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:54,457 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:54,457 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:54,457 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:54,457 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:54,457 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:54,457 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:54,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 86 transitions, 1009 flow [2021-08-12 21:45:54,470 INFO L129 PetriNetUnfolder]: 0/167 cut-off events. [2021-08-12 21:45:54,470 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,471 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. [2021-08-12 21:45:54,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 86 transitions, 1009 flow [2021-08-12 21:45:54,472 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 84 transitions, 1005 flow [2021-08-12 21:45:54,472 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:54,472 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,472 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,472 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:54,472 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,473 INFO L82 PathProgramCache]: Analyzing trace with hash 41667, now seen corresponding path program 1 times [2021-08-12 21:45:54,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115891735] [2021-08-12 21:45:54,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:54,478 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:54,478 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:54,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:54,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115891735] [2021-08-12 21:45:54,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115891735] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:54,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:54,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:54,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512464376] [2021-08-12 21:45:54,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:54,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:54,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:54,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:54,481 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 86 [2021-08-12 21:45:54,481 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) [2021-08-12 21:45:54,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:54,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 86 [2021-08-12 21:45:54,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:54,494 INFO L129 PetriNetUnfolder]: 0/83 cut-off events. [2021-08-12 21:45:54,494 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,494 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. [2021-08-12 21:45:54,495 INFO L132 encePairwiseOnDemand]: 84/86 looper letters, 0 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2021-08-12 21:45:54,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 83 transitions, 1005 flow [2021-08-12 21:45:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:54,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2021-08-12 21:45:54,496 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9728682170542635 [2021-08-12 21:45:54,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2021-08-12 21:45:54,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2021-08-12 21:45:54,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:54,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2021-08-12 21:45:54,496 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) [2021-08-12 21:45:54,497 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) [2021-08-12 21:45:54,497 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) [2021-08-12 21:45:54,497 INFO L348 CegarLoopForPetriNet]: 139 programPoint places, 1 predicate places. [2021-08-12 21:45:54,497 INFO L482 AbstractCegarLoop]: Abstraction has has 140 places, 83 transitions, 1005 flow [2021-08-12 21:45:54,497 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) [2021-08-12 21:45:54,497 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,497 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] [2021-08-12 21:45:54,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-08-12 21:45:54,497 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,497 INFO L82 PathProgramCache]: Analyzing trace with hash 941229833, now seen corresponding path program 1 times [2021-08-12 21:45:54,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645233375] [2021-08-12 21:45:54,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,502 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,503 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,507 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:54,507 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:54,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-08-12 21:45:54,508 WARN L235 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:54,508 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2021-08-12 21:45:54,544 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:54,544 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:54,545 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:54,545 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:54,545 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:54,545 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:54,545 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:54,545 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:54,545 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:54,545 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:54,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 146 places, 89 transitions, 1074 flow [2021-08-12 21:45:54,561 INFO L129 PetriNetUnfolder]: 0/173 cut-off events. [2021-08-12 21:45:54,561 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,561 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. [2021-08-12 21:45:54,561 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 89 transitions, 1074 flow [2021-08-12 21:45:54,562 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 87 transitions, 1070 flow [2021-08-12 21:45:54,562 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:54,562 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,562 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,562 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:54,562 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,562 INFO L82 PathProgramCache]: Analyzing trace with hash 44515, now seen corresponding path program 1 times [2021-08-12 21:45:54,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823616560] [2021-08-12 21:45:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:54,568 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:54,569 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:54,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:54,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823616560] [2021-08-12 21:45:54,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823616560] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:54,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:54,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:54,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895132719] [2021-08-12 21:45:54,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:54,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:54,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:54,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:54,572 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 89 [2021-08-12 21:45:54,572 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) [2021-08-12 21:45:54,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:54,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 89 [2021-08-12 21:45:54,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:54,583 INFO L129 PetriNetUnfolder]: 0/86 cut-off events. [2021-08-12 21:45:54,583 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,583 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. [2021-08-12 21:45:54,583 INFO L132 encePairwiseOnDemand]: 87/89 looper letters, 0 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2021-08-12 21:45:54,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 86 transitions, 1070 flow [2021-08-12 21:45:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2021-08-12 21:45:54,584 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9737827715355806 [2021-08-12 21:45:54,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2021-08-12 21:45:54,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2021-08-12 21:45:54,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:54,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2021-08-12 21:45:54,585 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) [2021-08-12 21:45:54,585 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) [2021-08-12 21:45:54,585 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) [2021-08-12 21:45:54,585 INFO L348 CegarLoopForPetriNet]: 144 programPoint places, 1 predicate places. [2021-08-12 21:45:54,585 INFO L482 AbstractCegarLoop]: Abstraction has has 145 places, 86 transitions, 1070 flow [2021-08-12 21:45:54,585 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) [2021-08-12 21:45:54,585 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,585 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] [2021-08-12 21:45:54,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-08-12 21:45:54,586 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1443307026, now seen corresponding path program 1 times [2021-08-12 21:45:54,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317561219] [2021-08-12 21:45:54,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,590 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,591 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,595 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:54,595 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:54,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-08-12 21:45:54,596 WARN L235 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:54,596 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2021-08-12 21:45:54,622 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:54,622 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:54,623 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:54,623 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:54,623 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:54,623 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:54,623 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:54,624 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:54,624 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:54,624 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:54,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 151 places, 92 transitions, 1141 flow [2021-08-12 21:45:54,639 INFO L129 PetriNetUnfolder]: 0/179 cut-off events. [2021-08-12 21:45:54,639 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,639 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. [2021-08-12 21:45:54,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 92 transitions, 1141 flow [2021-08-12 21:45:54,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 90 transitions, 1137 flow [2021-08-12 21:45:54,640 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:54,640 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,640 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,640 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:54,640 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,640 INFO L82 PathProgramCache]: Analyzing trace with hash 47459, now seen corresponding path program 1 times [2021-08-12 21:45:54,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902423197] [2021-08-12 21:45:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:54,646 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:54,646 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:54,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:54,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902423197] [2021-08-12 21:45:54,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902423197] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:54,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:54,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:54,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641365743] [2021-08-12 21:45:54,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:54,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:54,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:54,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:54,649 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 92 [2021-08-12 21:45:54,650 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) [2021-08-12 21:45:54,650 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:54,650 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 92 [2021-08-12 21:45:54,650 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:54,661 INFO L129 PetriNetUnfolder]: 0/89 cut-off events. [2021-08-12 21:45:54,662 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,662 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. [2021-08-12 21:45:54,662 INFO L132 encePairwiseOnDemand]: 90/92 looper letters, 0 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2021-08-12 21:45:54,662 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 89 transitions, 1137 flow [2021-08-12 21:45:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2021-08-12 21:45:54,662 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9746376811594203 [2021-08-12 21:45:54,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2021-08-12 21:45:54,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2021-08-12 21:45:54,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:54,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2021-08-12 21:45:54,663 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) [2021-08-12 21:45:54,664 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) [2021-08-12 21:45:54,664 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) [2021-08-12 21:45:54,665 INFO L348 CegarLoopForPetriNet]: 149 programPoint places, 1 predicate places. [2021-08-12 21:45:54,665 INFO L482 AbstractCegarLoop]: Abstraction has has 150 places, 89 transitions, 1137 flow [2021-08-12 21:45:54,665 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) [2021-08-12 21:45:54,665 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,665 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] [2021-08-12 21:45:54,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-08-12 21:45:54,666 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1664869597, now seen corresponding path program 1 times [2021-08-12 21:45:54,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067508903] [2021-08-12 21:45:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,670 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,672 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,675 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:54,676 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:54,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-08-12 21:45:54,676 WARN L235 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:54,676 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2021-08-12 21:45:54,706 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:54,706 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:54,707 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:54,707 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:54,707 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:54,707 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:54,707 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:54,707 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:54,707 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:54,707 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:54,708 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 156 places, 95 transitions, 1210 flow [2021-08-12 21:45:54,726 INFO L129 PetriNetUnfolder]: 0/185 cut-off events. [2021-08-12 21:45:54,726 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,726 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. [2021-08-12 21:45:54,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 95 transitions, 1210 flow [2021-08-12 21:45:54,729 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 93 transitions, 1206 flow [2021-08-12 21:45:54,730 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:54,730 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,730 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,730 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:54,730 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,730 INFO L82 PathProgramCache]: Analyzing trace with hash 50499, now seen corresponding path program 1 times [2021-08-12 21:45:54,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214241345] [2021-08-12 21:45:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:54,736 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:54,736 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:54,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:54,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214241345] [2021-08-12 21:45:54,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214241345] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:54,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:54,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:54,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548413733] [2021-08-12 21:45:54,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:54,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:54,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:54,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:54,740 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 95 [2021-08-12 21:45:54,740 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) [2021-08-12 21:45:54,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:54,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 95 [2021-08-12 21:45:54,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:54,753 INFO L129 PetriNetUnfolder]: 0/92 cut-off events. [2021-08-12 21:45:54,753 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,753 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. [2021-08-12 21:45:54,754 INFO L132 encePairwiseOnDemand]: 93/95 looper letters, 0 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2021-08-12 21:45:54,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 92 transitions, 1206 flow [2021-08-12 21:45:54,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:54,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2021-08-12 21:45:54,754 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9754385964912281 [2021-08-12 21:45:54,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2021-08-12 21:45:54,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2021-08-12 21:45:54,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:54,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2021-08-12 21:45:54,755 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) [2021-08-12 21:45:54,756 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) [2021-08-12 21:45:54,756 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) [2021-08-12 21:45:54,756 INFO L348 CegarLoopForPetriNet]: 154 programPoint places, 1 predicate places. [2021-08-12 21:45:54,756 INFO L482 AbstractCegarLoop]: Abstraction has has 155 places, 92 transitions, 1206 flow [2021-08-12 21:45:54,756 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) [2021-08-12 21:45:54,756 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,756 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] [2021-08-12 21:45:54,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-08-12 21:45:54,756 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,756 INFO L82 PathProgramCache]: Analyzing trace with hash -678346091, now seen corresponding path program 1 times [2021-08-12 21:45:54,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682756507] [2021-08-12 21:45:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,762 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,763 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,767 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:54,767 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:54,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-08-12 21:45:54,768 WARN L235 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:54,768 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2021-08-12 21:45:54,796 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:54,796 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:54,796 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:54,796 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:54,796 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:54,796 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:54,796 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:54,797 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:54,797 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:54,797 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:54,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 161 places, 98 transitions, 1281 flow [2021-08-12 21:45:54,814 INFO L129 PetriNetUnfolder]: 0/191 cut-off events. [2021-08-12 21:45:54,814 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,814 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. [2021-08-12 21:45:54,814 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 98 transitions, 1281 flow [2021-08-12 21:45:54,815 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 96 transitions, 1277 flow [2021-08-12 21:45:54,815 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:54,815 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,815 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,815 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:54,815 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,816 INFO L82 PathProgramCache]: Analyzing trace with hash 53635, now seen corresponding path program 1 times [2021-08-12 21:45:54,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971051214] [2021-08-12 21:45:54,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:54,822 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:54,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:54,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:54,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971051214] [2021-08-12 21:45:54,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971051214] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:54,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:54,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:54,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884719529] [2021-08-12 21:45:54,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:54,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:54,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:54,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:54,825 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 98 [2021-08-12 21:45:54,825 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) [2021-08-12 21:45:54,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:54,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 98 [2021-08-12 21:45:54,825 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:54,862 INFO L129 PetriNetUnfolder]: 0/95 cut-off events. [2021-08-12 21:45:54,862 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,862 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. [2021-08-12 21:45:54,863 INFO L132 encePairwiseOnDemand]: 96/98 looper letters, 0 selfloop transitions, 1 changer transitions 0/95 dead transitions. [2021-08-12 21:45:54,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 95 transitions, 1277 flow [2021-08-12 21:45:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2021-08-12 21:45:54,863 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9761904761904762 [2021-08-12 21:45:54,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2021-08-12 21:45:54,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2021-08-12 21:45:54,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:54,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2021-08-12 21:45:54,864 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) [2021-08-12 21:45:54,865 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) [2021-08-12 21:45:54,865 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) [2021-08-12 21:45:54,865 INFO L348 CegarLoopForPetriNet]: 159 programPoint places, 1 predicate places. [2021-08-12 21:45:54,865 INFO L482 AbstractCegarLoop]: Abstraction has has 160 places, 95 transitions, 1277 flow [2021-08-12 21:45:54,865 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) [2021-08-12 21:45:54,865 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,865 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] [2021-08-12 21:45:54,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-08-12 21:45:54,865 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash -358163843, now seen corresponding path program 1 times [2021-08-12 21:45:54,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424868222] [2021-08-12 21:45:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,870 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,871 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,875 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:54,875 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:54,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-08-12 21:45:54,875 WARN L235 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:54,875 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2021-08-12 21:45:54,907 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:54,907 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:54,907 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:54,907 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:54,907 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:54,907 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:54,907 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:54,907 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:54,907 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:54,907 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:54,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 166 places, 101 transitions, 1354 flow [2021-08-12 21:45:54,927 INFO L129 PetriNetUnfolder]: 0/197 cut-off events. [2021-08-12 21:45:54,927 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,927 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. [2021-08-12 21:45:54,927 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 101 transitions, 1354 flow [2021-08-12 21:45:54,928 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 99 transitions, 1350 flow [2021-08-12 21:45:54,929 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:54,929 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,929 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,929 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:54,929 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,929 INFO L82 PathProgramCache]: Analyzing trace with hash 56867, now seen corresponding path program 1 times [2021-08-12 21:45:54,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780581288] [2021-08-12 21:45:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:54,939 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:54,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:54,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:54,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780581288] [2021-08-12 21:45:54,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780581288] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:54,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:54,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:54,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510404927] [2021-08-12 21:45:54,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:54,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:54,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:54,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:54,945 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 101 [2021-08-12 21:45:54,945 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) [2021-08-12 21:45:54,945 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:54,945 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 101 [2021-08-12 21:45:54,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:54,961 INFO L129 PetriNetUnfolder]: 0/98 cut-off events. [2021-08-12 21:45:54,961 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:54,961 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. [2021-08-12 21:45:54,961 INFO L132 encePairwiseOnDemand]: 99/101 looper letters, 0 selfloop transitions, 1 changer transitions 0/98 dead transitions. [2021-08-12 21:45:54,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 98 transitions, 1350 flow [2021-08-12 21:45:54,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:54,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2021-08-12 21:45:54,962 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.976897689768977 [2021-08-12 21:45:54,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2021-08-12 21:45:54,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2021-08-12 21:45:54,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:54,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2021-08-12 21:45:54,963 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) [2021-08-12 21:45:54,964 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) [2021-08-12 21:45:54,964 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) [2021-08-12 21:45:54,964 INFO L348 CegarLoopForPetriNet]: 164 programPoint places, 1 predicate places. [2021-08-12 21:45:54,964 INFO L482 AbstractCegarLoop]: Abstraction has has 165 places, 98 transitions, 1350 flow [2021-08-12 21:45:54,965 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) [2021-08-12 21:45:54,965 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:54,965 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] [2021-08-12 21:45:54,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-08-12 21:45:54,965 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:54,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:54,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1932783016, now seen corresponding path program 1 times [2021-08-12 21:45:54,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:54,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916827157] [2021-08-12 21:45:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,972 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:54,975 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:54,979 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:54,979 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:54,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-08-12 21:45:54,979 WARN L235 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:54,979 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2021-08-12 21:45:55,013 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:55,014 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:55,014 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:55,014 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:55,014 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:55,014 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:55,014 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:55,014 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:55,014 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:55,014 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:55,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 171 places, 104 transitions, 1429 flow [2021-08-12 21:45:55,034 INFO L129 PetriNetUnfolder]: 0/203 cut-off events. [2021-08-12 21:45:55,035 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,035 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. [2021-08-12 21:45:55,035 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 104 transitions, 1429 flow [2021-08-12 21:45:55,036 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 102 transitions, 1425 flow [2021-08-12 21:45:55,036 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:55,036 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,036 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,036 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:55,036 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,037 INFO L82 PathProgramCache]: Analyzing trace with hash 60195, now seen corresponding path program 1 times [2021-08-12 21:45:55,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897280735] [2021-08-12 21:45:55,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:55,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:55,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:55,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:55,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897280735] [2021-08-12 21:45:55,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897280735] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:55,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:55,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:55,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251829774] [2021-08-12 21:45:55,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:55,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:55,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:55,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:55,046 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 104 [2021-08-12 21:45:55,046 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) [2021-08-12 21:45:55,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:55,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 104 [2021-08-12 21:45:55,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:55,062 INFO L129 PetriNetUnfolder]: 0/101 cut-off events. [2021-08-12 21:45:55,062 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,063 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. [2021-08-12 21:45:55,063 INFO L132 encePairwiseOnDemand]: 102/104 looper letters, 0 selfloop transitions, 1 changer transitions 0/101 dead transitions. [2021-08-12 21:45:55,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 101 transitions, 1425 flow [2021-08-12 21:45:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2021-08-12 21:45:55,064 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9775641025641025 [2021-08-12 21:45:55,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2021-08-12 21:45:55,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2021-08-12 21:45:55,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:55,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2021-08-12 21:45:55,064 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) [2021-08-12 21:45:55,065 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) [2021-08-12 21:45:55,065 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) [2021-08-12 21:45:55,065 INFO L348 CegarLoopForPetriNet]: 169 programPoint places, 1 predicate places. [2021-08-12 21:45:55,065 INFO L482 AbstractCegarLoop]: Abstraction has has 170 places, 101 transitions, 1425 flow [2021-08-12 21:45:55,065 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) [2021-08-12 21:45:55,065 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,065 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] [2021-08-12 21:45:55,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-08-12 21:45:55,065 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1649052521, now seen corresponding path program 1 times [2021-08-12 21:45:55,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884374817] [2021-08-12 21:45:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,071 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,073 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,077 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:55,077 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:55,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-08-12 21:45:55,077 WARN L235 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:55,077 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2021-08-12 21:45:55,107 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:55,107 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:55,107 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:55,107 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:55,107 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:55,108 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:55,108 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:55,108 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:55,108 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:55,108 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:55,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 176 places, 107 transitions, 1506 flow [2021-08-12 21:45:55,129 INFO L129 PetriNetUnfolder]: 0/209 cut-off events. [2021-08-12 21:45:55,131 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,131 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. [2021-08-12 21:45:55,131 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 107 transitions, 1506 flow [2021-08-12 21:45:55,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 105 transitions, 1502 flow [2021-08-12 21:45:55,133 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:55,133 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,133 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,133 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:55,133 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,133 INFO L82 PathProgramCache]: Analyzing trace with hash 63619, now seen corresponding path program 1 times [2021-08-12 21:45:55,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110978958] [2021-08-12 21:45:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:55,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:55,139 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:55,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:55,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110978958] [2021-08-12 21:45:55,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110978958] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:55,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:55,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:55,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731960032] [2021-08-12 21:45:55,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:55,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:55,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:55,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:55,142 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 107 [2021-08-12 21:45:55,142 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) [2021-08-12 21:45:55,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:55,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 107 [2021-08-12 21:45:55,142 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:55,159 INFO L129 PetriNetUnfolder]: 0/104 cut-off events. [2021-08-12 21:45:55,159 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,159 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. [2021-08-12 21:45:55,160 INFO L132 encePairwiseOnDemand]: 105/107 looper letters, 0 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2021-08-12 21:45:55,160 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 104 transitions, 1502 flow [2021-08-12 21:45:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2021-08-12 21:45:55,161 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9781931464174455 [2021-08-12 21:45:55,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2021-08-12 21:45:55,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2021-08-12 21:45:55,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:55,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2021-08-12 21:45:55,162 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) [2021-08-12 21:45:55,162 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) [2021-08-12 21:45:55,162 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) [2021-08-12 21:45:55,163 INFO L348 CegarLoopForPetriNet]: 174 programPoint places, 1 predicate places. [2021-08-12 21:45:55,163 INFO L482 AbstractCegarLoop]: Abstraction has has 175 places, 104 transitions, 1502 flow [2021-08-12 21:45:55,163 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) [2021-08-12 21:45:55,163 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,163 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] [2021-08-12 21:45:55,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-08-12 21:45:55,166 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,167 INFO L82 PathProgramCache]: Analyzing trace with hash -973944357, now seen corresponding path program 1 times [2021-08-12 21:45:55,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464567897] [2021-08-12 21:45:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,172 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,174 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,184 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:55,184 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:55,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-08-12 21:45:55,184 WARN L235 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:55,184 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2021-08-12 21:45:55,217 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:55,217 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:55,218 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:55,218 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:55,218 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:55,218 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:55,218 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:55,218 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:55,218 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:55,218 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:55,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 181 places, 110 transitions, 1585 flow [2021-08-12 21:45:55,244 INFO L129 PetriNetUnfolder]: 0/215 cut-off events. [2021-08-12 21:45:55,244 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,244 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. [2021-08-12 21:45:55,244 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 110 transitions, 1585 flow [2021-08-12 21:45:55,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 108 transitions, 1581 flow [2021-08-12 21:45:55,245 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:55,245 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,245 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,246 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:55,246 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,246 INFO L82 PathProgramCache]: Analyzing trace with hash 67139, now seen corresponding path program 1 times [2021-08-12 21:45:55,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673046896] [2021-08-12 21:45:55,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:55,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:55,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:55,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:55,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673046896] [2021-08-12 21:45:55,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673046896] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:55,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:55,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:55,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430668718] [2021-08-12 21:45:55,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:55,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:55,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:55,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:55,278 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 110 [2021-08-12 21:45:55,279 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) [2021-08-12 21:45:55,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:55,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 110 [2021-08-12 21:45:55,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:55,299 INFO L129 PetriNetUnfolder]: 0/107 cut-off events. [2021-08-12 21:45:55,299 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,299 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. [2021-08-12 21:45:55,300 INFO L132 encePairwiseOnDemand]: 108/110 looper letters, 0 selfloop transitions, 1 changer transitions 0/107 dead transitions. [2021-08-12 21:45:55,300 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 107 transitions, 1581 flow [2021-08-12 21:45:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:55,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2021-08-12 21:45:55,301 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9787878787878788 [2021-08-12 21:45:55,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2021-08-12 21:45:55,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2021-08-12 21:45:55,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:55,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2021-08-12 21:45:55,303 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) [2021-08-12 21:45:55,308 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) [2021-08-12 21:45:55,308 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) [2021-08-12 21:45:55,308 INFO L348 CegarLoopForPetriNet]: 179 programPoint places, 1 predicate places. [2021-08-12 21:45:55,309 INFO L482 AbstractCegarLoop]: Abstraction has has 180 places, 107 transitions, 1581 flow [2021-08-12 21:45:55,309 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) [2021-08-12 21:45:55,309 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,309 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] [2021-08-12 21:45:55,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-08-12 21:45:55,309 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1276847327, now seen corresponding path program 1 times [2021-08-12 21:45:55,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186806427] [2021-08-12 21:45:55,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,316 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,318 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,321 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:55,322 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:55,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-08-12 21:45:55,322 WARN L235 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:55,322 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2021-08-12 21:45:55,356 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:55,357 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:55,357 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:55,357 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:55,357 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:55,357 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:55,357 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:55,357 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:55,357 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:55,357 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:55,359 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 186 places, 113 transitions, 1666 flow [2021-08-12 21:45:55,388 INFO L129 PetriNetUnfolder]: 0/221 cut-off events. [2021-08-12 21:45:55,388 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,388 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. [2021-08-12 21:45:55,388 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 113 transitions, 1666 flow [2021-08-12 21:45:55,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 111 transitions, 1662 flow [2021-08-12 21:45:55,390 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:55,390 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,390 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,390 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:55,390 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,391 INFO L82 PathProgramCache]: Analyzing trace with hash 70755, now seen corresponding path program 1 times [2021-08-12 21:45:55,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803670218] [2021-08-12 21:45:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:55,397 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:55,397 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:55,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:55,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803670218] [2021-08-12 21:45:55,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803670218] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:55,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:55,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:55,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464854050] [2021-08-12 21:45:55,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:55,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:55,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:55,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:55,401 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 113 [2021-08-12 21:45:55,401 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) [2021-08-12 21:45:55,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:55,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 113 [2021-08-12 21:45:55,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:55,427 INFO L129 PetriNetUnfolder]: 0/110 cut-off events. [2021-08-12 21:45:55,427 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,427 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. [2021-08-12 21:45:55,428 INFO L132 encePairwiseOnDemand]: 111/113 looper letters, 0 selfloop transitions, 1 changer transitions 0/110 dead transitions. [2021-08-12 21:45:55,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 110 transitions, 1662 flow [2021-08-12 21:45:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2021-08-12 21:45:55,429 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9793510324483776 [2021-08-12 21:45:55,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2021-08-12 21:45:55,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2021-08-12 21:45:55,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:55,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2021-08-12 21:45:55,430 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) [2021-08-12 21:45:55,431 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) [2021-08-12 21:45:55,431 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) [2021-08-12 21:45:55,431 INFO L348 CegarLoopForPetriNet]: 184 programPoint places, 1 predicate places. [2021-08-12 21:45:55,431 INFO L482 AbstractCegarLoop]: Abstraction has has 185 places, 110 transitions, 1662 flow [2021-08-12 21:45:55,431 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) [2021-08-12 21:45:55,431 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,431 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] [2021-08-12 21:45:55,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-08-12 21:45:55,431 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1575642526, now seen corresponding path program 1 times [2021-08-12 21:45:55,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769160643] [2021-08-12 21:45:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,438 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,440 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,444 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:55,444 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:55,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-08-12 21:45:55,444 WARN L235 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:55,444 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2021-08-12 21:45:55,482 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:55,482 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:55,483 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:55,483 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:55,483 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:55,483 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:55,483 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:55,483 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:55,483 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:55,483 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:55,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 191 places, 116 transitions, 1749 flow [2021-08-12 21:45:55,512 INFO L129 PetriNetUnfolder]: 0/227 cut-off events. [2021-08-12 21:45:55,512 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,512 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. [2021-08-12 21:45:55,512 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 116 transitions, 1749 flow [2021-08-12 21:45:55,514 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 114 transitions, 1745 flow [2021-08-12 21:45:55,514 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:55,514 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,514 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,514 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:55,514 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,515 INFO L82 PathProgramCache]: Analyzing trace with hash 74467, now seen corresponding path program 1 times [2021-08-12 21:45:55,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627089568] [2021-08-12 21:45:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:55,522 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:55,522 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:55,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:55,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627089568] [2021-08-12 21:45:55,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627089568] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:55,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:55,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:55,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221323134] [2021-08-12 21:45:55,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:55,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:55,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:55,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:55,526 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 116 [2021-08-12 21:45:55,526 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) [2021-08-12 21:45:55,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:55,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 116 [2021-08-12 21:45:55,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:55,550 INFO L129 PetriNetUnfolder]: 0/113 cut-off events. [2021-08-12 21:45:55,550 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,550 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. [2021-08-12 21:45:55,550 INFO L132 encePairwiseOnDemand]: 114/116 looper letters, 0 selfloop transitions, 1 changer transitions 0/113 dead transitions. [2021-08-12 21:45:55,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 113 transitions, 1745 flow [2021-08-12 21:45:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:55,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:55,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2021-08-12 21:45:55,551 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9798850574712644 [2021-08-12 21:45:55,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2021-08-12 21:45:55,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2021-08-12 21:45:55,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:55,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2021-08-12 21:45:55,552 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) [2021-08-12 21:45:55,553 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) [2021-08-12 21:45:55,553 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) [2021-08-12 21:45:55,553 INFO L348 CegarLoopForPetriNet]: 189 programPoint places, 1 predicate places. [2021-08-12 21:45:55,554 INFO L482 AbstractCegarLoop]: Abstraction has has 190 places, 113 transitions, 1745 flow [2021-08-12 21:45:55,554 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) [2021-08-12 21:45:55,554 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,554 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] [2021-08-12 21:45:55,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-08-12 21:45:55,554 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1399722715, now seen corresponding path program 1 times [2021-08-12 21:45:55,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503565192] [2021-08-12 21:45:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,563 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,564 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,568 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:55,568 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:55,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-08-12 21:45:55,570 WARN L235 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:55,570 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2021-08-12 21:45:55,605 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:55,605 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:55,605 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:55,605 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:55,605 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:55,605 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:55,605 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:55,605 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:55,605 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:55,605 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:55,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 196 places, 119 transitions, 1834 flow [2021-08-12 21:45:55,632 INFO L129 PetriNetUnfolder]: 0/233 cut-off events. [2021-08-12 21:45:55,633 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,633 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. [2021-08-12 21:45:55,633 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 119 transitions, 1834 flow [2021-08-12 21:45:55,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 117 transitions, 1830 flow [2021-08-12 21:45:55,638 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:55,638 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,638 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,638 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:55,638 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,638 INFO L82 PathProgramCache]: Analyzing trace with hash 78275, now seen corresponding path program 1 times [2021-08-12 21:45:55,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243422728] [2021-08-12 21:45:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:55,645 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:55,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:55,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:55,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243422728] [2021-08-12 21:45:55,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243422728] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:55,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:55,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:55,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765191908] [2021-08-12 21:45:55,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:55,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:55,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:55,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:55,648 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 119 [2021-08-12 21:45:55,648 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) [2021-08-12 21:45:55,648 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:55,648 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 119 [2021-08-12 21:45:55,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:55,670 INFO L129 PetriNetUnfolder]: 0/116 cut-off events. [2021-08-12 21:45:55,671 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,671 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. [2021-08-12 21:45:55,671 INFO L132 encePairwiseOnDemand]: 117/119 looper letters, 0 selfloop transitions, 1 changer transitions 0/116 dead transitions. [2021-08-12 21:45:55,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 116 transitions, 1830 flow [2021-08-12 21:45:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:55,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2021-08-12 21:45:55,672 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9803921568627451 [2021-08-12 21:45:55,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2021-08-12 21:45:55,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2021-08-12 21:45:55,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:55,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2021-08-12 21:45:55,672 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) [2021-08-12 21:45:55,673 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) [2021-08-12 21:45:55,673 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) [2021-08-12 21:45:55,673 INFO L348 CegarLoopForPetriNet]: 194 programPoint places, 1 predicate places. [2021-08-12 21:45:55,673 INFO L482 AbstractCegarLoop]: Abstraction has has 195 places, 116 transitions, 1830 flow [2021-08-12 21:45:55,673 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) [2021-08-12 21:45:55,673 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,673 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] [2021-08-12 21:45:55,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-08-12 21:45:55,673 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2142347809, now seen corresponding path program 1 times [2021-08-12 21:45:55,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408770417] [2021-08-12 21:45:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,680 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,682 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,688 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:55,688 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:55,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-08-12 21:45:55,688 WARN L235 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:55,688 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2021-08-12 21:45:55,727 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:55,727 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:55,728 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:55,728 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:55,728 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:55,728 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:55,728 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:55,728 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:55,728 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:55,728 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:55,730 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 201 places, 122 transitions, 1921 flow [2021-08-12 21:45:55,754 INFO L129 PetriNetUnfolder]: 0/239 cut-off events. [2021-08-12 21:45:55,754 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,754 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. [2021-08-12 21:45:55,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 122 transitions, 1921 flow [2021-08-12 21:45:55,755 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 120 transitions, 1917 flow [2021-08-12 21:45:55,755 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:55,755 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,755 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,755 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:55,756 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,756 INFO L82 PathProgramCache]: Analyzing trace with hash 82179, now seen corresponding path program 1 times [2021-08-12 21:45:55,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949133725] [2021-08-12 21:45:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:55,763 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:55,763 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:55,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:55,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949133725] [2021-08-12 21:45:55,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949133725] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:55,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:55,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:55,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528747163] [2021-08-12 21:45:55,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:55,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:55,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:55,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:55,767 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 122 [2021-08-12 21:45:55,767 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) [2021-08-12 21:45:55,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:55,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 122 [2021-08-12 21:45:55,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:55,787 INFO L129 PetriNetUnfolder]: 0/119 cut-off events. [2021-08-12 21:45:55,787 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,787 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. [2021-08-12 21:45:55,787 INFO L132 encePairwiseOnDemand]: 120/122 looper letters, 0 selfloop transitions, 1 changer transitions 0/119 dead transitions. [2021-08-12 21:45:55,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 119 transitions, 1917 flow [2021-08-12 21:45:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:55,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2021-08-12 21:45:55,788 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9808743169398907 [2021-08-12 21:45:55,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2021-08-12 21:45:55,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2021-08-12 21:45:55,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:55,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2021-08-12 21:45:55,789 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) [2021-08-12 21:45:55,789 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) [2021-08-12 21:45:55,789 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) [2021-08-12 21:45:55,789 INFO L348 CegarLoopForPetriNet]: 199 programPoint places, 1 predicate places. [2021-08-12 21:45:55,789 INFO L482 AbstractCegarLoop]: Abstraction has has 200 places, 119 transitions, 1917 flow [2021-08-12 21:45:55,789 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) [2021-08-12 21:45:55,789 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,790 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] [2021-08-12 21:45:55,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-08-12 21:45:55,790 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,790 INFO L82 PathProgramCache]: Analyzing trace with hash 73147637, now seen corresponding path program 1 times [2021-08-12 21:45:55,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321471424] [2021-08-12 21:45:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,797 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,798 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,802 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:55,802 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:55,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-08-12 21:45:55,803 WARN L235 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:55,803 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2021-08-12 21:45:55,837 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:55,837 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:55,838 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:55,838 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:55,838 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:55,838 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:55,838 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:55,838 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:55,838 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:55,838 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:55,839 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 206 places, 125 transitions, 2010 flow [2021-08-12 21:45:55,890 INFO L129 PetriNetUnfolder]: 0/245 cut-off events. [2021-08-12 21:45:55,891 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,891 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. [2021-08-12 21:45:55,891 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 125 transitions, 2010 flow [2021-08-12 21:45:55,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 123 transitions, 2006 flow [2021-08-12 21:45:55,892 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:55,892 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,892 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,892 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:55,892 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,893 INFO L82 PathProgramCache]: Analyzing trace with hash 86179, now seen corresponding path program 1 times [2021-08-12 21:45:55,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265614311] [2021-08-12 21:45:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:55,900 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:55,900 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:55,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:55,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265614311] [2021-08-12 21:45:55,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265614311] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:55,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:55,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:55,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236143221] [2021-08-12 21:45:55,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:55,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:55,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:55,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:55,903 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 125 [2021-08-12 21:45:55,903 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) [2021-08-12 21:45:55,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:55,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 125 [2021-08-12 21:45:55,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:55,924 INFO L129 PetriNetUnfolder]: 0/122 cut-off events. [2021-08-12 21:45:55,924 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:55,924 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. [2021-08-12 21:45:55,924 INFO L132 encePairwiseOnDemand]: 123/125 looper letters, 0 selfloop transitions, 1 changer transitions 0/122 dead transitions. [2021-08-12 21:45:55,924 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 122 transitions, 2006 flow [2021-08-12 21:45:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:55,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2021-08-12 21:45:55,925 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9813333333333333 [2021-08-12 21:45:55,925 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2021-08-12 21:45:55,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2021-08-12 21:45:55,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:55,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2021-08-12 21:45:55,926 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) [2021-08-12 21:45:55,926 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) [2021-08-12 21:45:55,926 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) [2021-08-12 21:45:55,926 INFO L348 CegarLoopForPetriNet]: 204 programPoint places, 1 predicate places. [2021-08-12 21:45:55,926 INFO L482 AbstractCegarLoop]: Abstraction has has 205 places, 122 transitions, 2006 flow [2021-08-12 21:45:55,926 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) [2021-08-12 21:45:55,926 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:55,927 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] [2021-08-12 21:45:55,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-08-12 21:45:55,927 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:55,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:55,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1311704092, now seen corresponding path program 1 times [2021-08-12 21:45:55,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:55,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140765976] [2021-08-12 21:45:55,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,933 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:55,935 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:55,939 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:55,939 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:55,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-08-12 21:45:55,940 WARN L235 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:55,940 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2021-08-12 21:45:55,974 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:55,975 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:55,975 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:55,975 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:55,975 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:55,975 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:55,975 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:55,975 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:55,975 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:55,975 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:55,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 211 places, 128 transitions, 2101 flow [2021-08-12 21:45:56,002 INFO L129 PetriNetUnfolder]: 0/251 cut-off events. [2021-08-12 21:45:56,002 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,002 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. [2021-08-12 21:45:56,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 128 transitions, 2101 flow [2021-08-12 21:45:56,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 126 transitions, 2097 flow [2021-08-12 21:45:56,003 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:56,003 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,003 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:56,003 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:56,004 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:56,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:56,004 INFO L82 PathProgramCache]: Analyzing trace with hash 90275, now seen corresponding path program 1 times [2021-08-12 21:45:56,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:56,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415167327] [2021-08-12 21:45:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:56,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:56,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:56,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:56,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415167327] [2021-08-12 21:45:56,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415167327] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:56,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:56,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:56,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971873102] [2021-08-12 21:45:56,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:56,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:56,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:56,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:56,015 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 128 [2021-08-12 21:45:56,015 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) [2021-08-12 21:45:56,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:56,015 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 128 [2021-08-12 21:45:56,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:56,041 INFO L129 PetriNetUnfolder]: 0/125 cut-off events. [2021-08-12 21:45:56,041 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,041 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. [2021-08-12 21:45:56,041 INFO L132 encePairwiseOnDemand]: 126/128 looper letters, 0 selfloop transitions, 1 changer transitions 0/125 dead transitions. [2021-08-12 21:45:56,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 125 transitions, 2097 flow [2021-08-12 21:45:56,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:56,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2021-08-12 21:45:56,042 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9817708333333334 [2021-08-12 21:45:56,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2021-08-12 21:45:56,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2021-08-12 21:45:56,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:56,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2021-08-12 21:45:56,043 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) [2021-08-12 21:45:56,043 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) [2021-08-12 21:45:56,043 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) [2021-08-12 21:45:56,043 INFO L348 CegarLoopForPetriNet]: 209 programPoint places, 1 predicate places. [2021-08-12 21:45:56,043 INFO L482 AbstractCegarLoop]: Abstraction has has 210 places, 125 transitions, 2097 flow [2021-08-12 21:45:56,043 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) [2021-08-12 21:45:56,044 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:56,044 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] [2021-08-12 21:45:56,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-08-12 21:45:56,044 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:56,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1607214609, now seen corresponding path program 1 times [2021-08-12 21:45:56,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:56,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461939178] [2021-08-12 21:45:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:56,052 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:56,054 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:56,058 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:56,058 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:56,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-08-12 21:45:56,058 WARN L235 ceAbstractionStarter]: 41 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:56,058 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 42 thread instances. [2021-08-12 21:45:56,124 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:56,124 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:56,124 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:56,125 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:56,125 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:56,125 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:56,125 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:56,125 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:56,125 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:56,125 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:56,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 216 places, 131 transitions, 2194 flow [2021-08-12 21:45:56,153 INFO L129 PetriNetUnfolder]: 0/257 cut-off events. [2021-08-12 21:45:56,153 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,154 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. [2021-08-12 21:45:56,154 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 131 transitions, 2194 flow [2021-08-12 21:45:56,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 129 transitions, 2190 flow [2021-08-12 21:45:56,155 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:56,155 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,155 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:56,155 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:56,155 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:56,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:56,156 INFO L82 PathProgramCache]: Analyzing trace with hash 94467, now seen corresponding path program 1 times [2021-08-12 21:45:56,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:56,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597417794] [2021-08-12 21:45:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:56,162 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:56,163 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:56,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:56,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597417794] [2021-08-12 21:45:56,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597417794] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:56,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:56,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:56,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975595173] [2021-08-12 21:45:56,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:56,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:56,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:56,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:56,166 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 131 [2021-08-12 21:45:56,167 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) [2021-08-12 21:45:56,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:56,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 131 [2021-08-12 21:45:56,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:56,193 INFO L129 PetriNetUnfolder]: 0/128 cut-off events. [2021-08-12 21:45:56,193 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,193 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. [2021-08-12 21:45:56,194 INFO L132 encePairwiseOnDemand]: 129/131 looper letters, 0 selfloop transitions, 1 changer transitions 0/128 dead transitions. [2021-08-12 21:45:56,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 128 transitions, 2190 flow [2021-08-12 21:45:56,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:56,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2021-08-12 21:45:56,194 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9821882951653944 [2021-08-12 21:45:56,194 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2021-08-12 21:45:56,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2021-08-12 21:45:56,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:56,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2021-08-12 21:45:56,198 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) [2021-08-12 21:45:56,200 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) [2021-08-12 21:45:56,200 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) [2021-08-12 21:45:56,200 INFO L348 CegarLoopForPetriNet]: 214 programPoint places, 1 predicate places. [2021-08-12 21:45:56,200 INFO L482 AbstractCegarLoop]: Abstraction has has 215 places, 128 transitions, 2190 flow [2021-08-12 21:45:56,200 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) [2021-08-12 21:45:56,200 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:56,200 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] [2021-08-12 21:45:56,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-08-12 21:45:56,201 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:56,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:56,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1479889049, now seen corresponding path program 1 times [2021-08-12 21:45:56,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:56,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982954112] [2021-08-12 21:45:56,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:56,210 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:56,220 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:56,227 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:56,228 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:56,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-08-12 21:45:56,228 WARN L235 ceAbstractionStarter]: 42 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:56,228 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 43 thread instances. [2021-08-12 21:45:56,272 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:56,272 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:56,273 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:56,273 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:56,273 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:56,273 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:56,273 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:56,273 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:56,273 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:56,273 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:56,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 221 places, 134 transitions, 2289 flow [2021-08-12 21:45:56,305 INFO L129 PetriNetUnfolder]: 0/263 cut-off events. [2021-08-12 21:45:56,305 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,305 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. [2021-08-12 21:45:56,305 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 134 transitions, 2289 flow [2021-08-12 21:45:56,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 132 transitions, 2285 flow [2021-08-12 21:45:56,307 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:56,308 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,308 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:56,308 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:56,308 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:56,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:56,309 INFO L82 PathProgramCache]: Analyzing trace with hash 98755, now seen corresponding path program 1 times [2021-08-12 21:45:56,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:56,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951284821] [2021-08-12 21:45:56,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:56,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:56,323 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:56,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:56,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951284821] [2021-08-12 21:45:56,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951284821] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:56,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:56,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:56,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279025874] [2021-08-12 21:45:56,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:56,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:56,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:56,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:56,328 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 134 [2021-08-12 21:45:56,328 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) [2021-08-12 21:45:56,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:56,329 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 134 [2021-08-12 21:45:56,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:56,352 INFO L129 PetriNetUnfolder]: 0/131 cut-off events. [2021-08-12 21:45:56,352 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,352 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. [2021-08-12 21:45:56,353 INFO L132 encePairwiseOnDemand]: 132/134 looper letters, 0 selfloop transitions, 1 changer transitions 0/131 dead transitions. [2021-08-12 21:45:56,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 131 transitions, 2285 flow [2021-08-12 21:45:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2021-08-12 21:45:56,353 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9825870646766169 [2021-08-12 21:45:56,353 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2021-08-12 21:45:56,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2021-08-12 21:45:56,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:56,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2021-08-12 21:45:56,356 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) [2021-08-12 21:45:56,357 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) [2021-08-12 21:45:56,357 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) [2021-08-12 21:45:56,358 INFO L348 CegarLoopForPetriNet]: 219 programPoint places, 1 predicate places. [2021-08-12 21:45:56,358 INFO L482 AbstractCegarLoop]: Abstraction has has 220 places, 131 transitions, 2285 flow [2021-08-12 21:45:56,358 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) [2021-08-12 21:45:56,358 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:56,358 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] [2021-08-12 21:45:56,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-08-12 21:45:56,358 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:56,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:56,358 INFO L82 PathProgramCache]: Analyzing trace with hash -881273863, now seen corresponding path program 1 times [2021-08-12 21:45:56,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:56,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915490929] [2021-08-12 21:45:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:56,366 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:56,368 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:56,373 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:56,373 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:56,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-08-12 21:45:56,373 WARN L235 ceAbstractionStarter]: 43 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:56,373 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 44 thread instances. [2021-08-12 21:45:56,411 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:56,411 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:56,412 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:56,412 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:56,412 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:56,412 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:56,412 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:56,412 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:56,412 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:56,412 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:56,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 226 places, 137 transitions, 2386 flow [2021-08-12 21:45:56,467 INFO L129 PetriNetUnfolder]: 0/269 cut-off events. [2021-08-12 21:45:56,467 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,467 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. [2021-08-12 21:45:56,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 137 transitions, 2386 flow [2021-08-12 21:45:56,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 135 transitions, 2382 flow [2021-08-12 21:45:56,469 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:56,469 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,469 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:56,469 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:56,469 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:56,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:56,469 INFO L82 PathProgramCache]: Analyzing trace with hash 103139, now seen corresponding path program 1 times [2021-08-12 21:45:56,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:56,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892776786] [2021-08-12 21:45:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:56,477 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:56,477 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:56,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:56,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892776786] [2021-08-12 21:45:56,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892776786] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:56,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:56,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:56,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394291956] [2021-08-12 21:45:56,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:56,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:56,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:56,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:56,480 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 137 [2021-08-12 21:45:56,480 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) [2021-08-12 21:45:56,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:56,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 137 [2021-08-12 21:45:56,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:56,504 INFO L129 PetriNetUnfolder]: 0/134 cut-off events. [2021-08-12 21:45:56,504 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,504 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. [2021-08-12 21:45:56,504 INFO L132 encePairwiseOnDemand]: 135/137 looper letters, 0 selfloop transitions, 1 changer transitions 0/134 dead transitions. [2021-08-12 21:45:56,505 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 134 transitions, 2382 flow [2021-08-12 21:45:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2021-08-12 21:45:56,505 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9829683698296837 [2021-08-12 21:45:56,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2021-08-12 21:45:56,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2021-08-12 21:45:56,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:56,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2021-08-12 21:45:56,506 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) [2021-08-12 21:45:56,506 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) [2021-08-12 21:45:56,506 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) [2021-08-12 21:45:56,506 INFO L348 CegarLoopForPetriNet]: 224 programPoint places, 1 predicate places. [2021-08-12 21:45:56,507 INFO L482 AbstractCegarLoop]: Abstraction has has 225 places, 134 transitions, 2382 flow [2021-08-12 21:45:56,507 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) [2021-08-12 21:45:56,507 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:56,507 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] [2021-08-12 21:45:56,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-08-12 21:45:56,507 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:56,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1502263594, now seen corresponding path program 1 times [2021-08-12 21:45:56,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:56,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233753535] [2021-08-12 21:45:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:56,515 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:56,516 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:56,523 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:56,523 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:56,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-08-12 21:45:56,523 WARN L235 ceAbstractionStarter]: 44 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:56,523 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 45 thread instances. [2021-08-12 21:45:56,562 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:56,562 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:56,563 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:56,563 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:56,563 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:56,563 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:56,563 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:56,563 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:56,563 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:56,563 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:56,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 231 places, 140 transitions, 2485 flow [2021-08-12 21:45:56,593 INFO L129 PetriNetUnfolder]: 0/275 cut-off events. [2021-08-12 21:45:56,594 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,594 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. [2021-08-12 21:45:56,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 140 transitions, 2485 flow [2021-08-12 21:45:56,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 138 transitions, 2481 flow [2021-08-12 21:45:56,595 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:56,595 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,595 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:56,595 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:56,595 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:56,596 INFO L82 PathProgramCache]: Analyzing trace with hash 107619, now seen corresponding path program 1 times [2021-08-12 21:45:56,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:56,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257967212] [2021-08-12 21:45:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:56,603 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:56,603 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:56,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:56,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257967212] [2021-08-12 21:45:56,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257967212] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:56,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:56,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:56,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755960868] [2021-08-12 21:45:56,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:56,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:56,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:56,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:56,606 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 140 [2021-08-12 21:45:56,606 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) [2021-08-12 21:45:56,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:56,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 140 [2021-08-12 21:45:56,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:56,631 INFO L129 PetriNetUnfolder]: 0/137 cut-off events. [2021-08-12 21:45:56,632 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,632 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. [2021-08-12 21:45:56,632 INFO L132 encePairwiseOnDemand]: 138/140 looper letters, 0 selfloop transitions, 1 changer transitions 0/137 dead transitions. [2021-08-12 21:45:56,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 137 transitions, 2481 flow [2021-08-12 21:45:56,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:56,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2021-08-12 21:45:56,633 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9833333333333333 [2021-08-12 21:45:56,633 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2021-08-12 21:45:56,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2021-08-12 21:45:56,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:56,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2021-08-12 21:45:56,633 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) [2021-08-12 21:45:56,634 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) [2021-08-12 21:45:56,634 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) [2021-08-12 21:45:56,634 INFO L348 CegarLoopForPetriNet]: 229 programPoint places, 1 predicate places. [2021-08-12 21:45:56,634 INFO L482 AbstractCegarLoop]: Abstraction has has 230 places, 137 transitions, 2481 flow [2021-08-12 21:45:56,634 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) [2021-08-12 21:45:56,634 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:56,634 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] [2021-08-12 21:45:56,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-08-12 21:45:56,635 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:56,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:56,635 INFO L82 PathProgramCache]: Analyzing trace with hash 832000557, now seen corresponding path program 1 times [2021-08-12 21:45:56,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:56,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246422568] [2021-08-12 21:45:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:56,642 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:56,644 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:56,650 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:56,651 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:56,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-08-12 21:45:56,651 WARN L235 ceAbstractionStarter]: 45 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:56,651 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 46 thread instances. [2021-08-12 21:45:56,694 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:56,694 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:56,695 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:56,695 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:56,695 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:56,695 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:56,695 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:56,695 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:56,695 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:56,695 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:56,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 236 places, 143 transitions, 2586 flow [2021-08-12 21:45:56,726 INFO L129 PetriNetUnfolder]: 0/281 cut-off events. [2021-08-12 21:45:56,726 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,727 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. [2021-08-12 21:45:56,727 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 143 transitions, 2586 flow [2021-08-12 21:45:56,728 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 141 transitions, 2582 flow [2021-08-12 21:45:56,728 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:56,729 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,729 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:56,729 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:56,729 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:56,729 INFO L82 PathProgramCache]: Analyzing trace with hash 112195, now seen corresponding path program 1 times [2021-08-12 21:45:56,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:56,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543846542] [2021-08-12 21:45:56,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:56,736 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:56,736 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:56,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:56,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543846542] [2021-08-12 21:45:56,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543846542] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:56,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:56,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:56,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692149869] [2021-08-12 21:45:56,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:56,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:56,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:56,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:56,740 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 143 [2021-08-12 21:45:56,740 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) [2021-08-12 21:45:56,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:56,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 143 [2021-08-12 21:45:56,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:56,765 INFO L129 PetriNetUnfolder]: 0/140 cut-off events. [2021-08-12 21:45:56,765 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,765 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. [2021-08-12 21:45:56,765 INFO L132 encePairwiseOnDemand]: 141/143 looper letters, 0 selfloop transitions, 1 changer transitions 0/140 dead transitions. [2021-08-12 21:45:56,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 140 transitions, 2582 flow [2021-08-12 21:45:56,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2021-08-12 21:45:56,766 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9836829836829837 [2021-08-12 21:45:56,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2021-08-12 21:45:56,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2021-08-12 21:45:56,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:56,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2021-08-12 21:45:56,767 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) [2021-08-12 21:45:56,767 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) [2021-08-12 21:45:56,767 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) [2021-08-12 21:45:56,767 INFO L348 CegarLoopForPetriNet]: 234 programPoint places, 1 predicate places. [2021-08-12 21:45:56,767 INFO L482 AbstractCegarLoop]: Abstraction has has 235 places, 140 transitions, 2582 flow [2021-08-12 21:45:56,767 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) [2021-08-12 21:45:56,767 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:56,768 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] [2021-08-12 21:45:56,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-08-12 21:45:56,768 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:56,768 INFO L82 PathProgramCache]: Analyzing trace with hash -522791507, now seen corresponding path program 1 times [2021-08-12 21:45:56,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:56,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970688330] [2021-08-12 21:45:56,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:56,775 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:56,777 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:56,781 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:56,781 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:56,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-08-12 21:45:56,781 WARN L235 ceAbstractionStarter]: 46 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:56,781 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 47 thread instances. [2021-08-12 21:45:56,820 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:56,821 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:56,821 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:56,821 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:56,821 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:56,821 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:56,821 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:56,821 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:56,821 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:56,821 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:56,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 241 places, 146 transitions, 2689 flow [2021-08-12 21:45:56,853 INFO L129 PetriNetUnfolder]: 0/287 cut-off events. [2021-08-12 21:45:56,854 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,854 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. [2021-08-12 21:45:56,854 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 146 transitions, 2689 flow [2021-08-12 21:45:56,855 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 144 transitions, 2685 flow [2021-08-12 21:45:56,855 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:56,855 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,856 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:56,856 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:56,856 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:56,856 INFO L82 PathProgramCache]: Analyzing trace with hash 116867, now seen corresponding path program 1 times [2021-08-12 21:45:56,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:56,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881953498] [2021-08-12 21:45:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:56,863 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:56,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:56,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:56,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881953498] [2021-08-12 21:45:56,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881953498] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:56,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:56,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:56,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303308333] [2021-08-12 21:45:56,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:56,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:56,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:56,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:56,867 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 146 [2021-08-12 21:45:56,867 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) [2021-08-12 21:45:56,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:56,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 146 [2021-08-12 21:45:56,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:56,925 INFO L129 PetriNetUnfolder]: 0/143 cut-off events. [2021-08-12 21:45:56,926 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:56,926 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. [2021-08-12 21:45:56,926 INFO L132 encePairwiseOnDemand]: 144/146 looper letters, 0 selfloop transitions, 1 changer transitions 0/143 dead transitions. [2021-08-12 21:45:56,926 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 143 transitions, 2685 flow [2021-08-12 21:45:56,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:56,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:56,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2021-08-12 21:45:56,927 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9840182648401826 [2021-08-12 21:45:56,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2021-08-12 21:45:56,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2021-08-12 21:45:56,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:56,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2021-08-12 21:45:56,927 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) [2021-08-12 21:45:56,928 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) [2021-08-12 21:45:56,928 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) [2021-08-12 21:45:56,928 INFO L348 CegarLoopForPetriNet]: 239 programPoint places, 1 predicate places. [2021-08-12 21:45:56,928 INFO L482 AbstractCegarLoop]: Abstraction has has 240 places, 143 transitions, 2685 flow [2021-08-12 21:45:56,928 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) [2021-08-12 21:45:56,928 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:56,928 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] [2021-08-12 21:45:56,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-08-12 21:45:56,929 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:56,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:56,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1233847341, now seen corresponding path program 1 times [2021-08-12 21:45:56,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:56,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918614182] [2021-08-12 21:45:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:56,936 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:56,938 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:56,942 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:56,942 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:56,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-08-12 21:45:56,942 WARN L235 ceAbstractionStarter]: 47 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:56,942 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 48 thread instances. [2021-08-12 21:45:56,982 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:56,983 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:56,983 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:56,983 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:56,983 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:56,983 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:56,983 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:56,983 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:56,983 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:56,983 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:56,985 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 246 places, 149 transitions, 2794 flow [2021-08-12 21:45:57,017 INFO L129 PetriNetUnfolder]: 0/293 cut-off events. [2021-08-12 21:45:57,017 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,017 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. [2021-08-12 21:45:57,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 149 transitions, 2794 flow [2021-08-12 21:45:57,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 147 transitions, 2790 flow [2021-08-12 21:45:57,019 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:57,019 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,019 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:57,019 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:57,019 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:57,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:57,020 INFO L82 PathProgramCache]: Analyzing trace with hash 121635, now seen corresponding path program 1 times [2021-08-12 21:45:57,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:57,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185029577] [2021-08-12 21:45:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:57,029 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:57,029 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:57,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:57,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185029577] [2021-08-12 21:45:57,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185029577] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:57,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:57,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:57,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247533242] [2021-08-12 21:45:57,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:57,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:57,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:57,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:57,032 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 149 [2021-08-12 21:45:57,032 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) [2021-08-12 21:45:57,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:57,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 149 [2021-08-12 21:45:57,033 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:57,059 INFO L129 PetriNetUnfolder]: 0/146 cut-off events. [2021-08-12 21:45:57,059 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,060 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. [2021-08-12 21:45:57,060 INFO L132 encePairwiseOnDemand]: 147/149 looper letters, 0 selfloop transitions, 1 changer transitions 0/146 dead transitions. [2021-08-12 21:45:57,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 146 transitions, 2790 flow [2021-08-12 21:45:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:57,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2021-08-12 21:45:57,061 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9843400447427293 [2021-08-12 21:45:57,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2021-08-12 21:45:57,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2021-08-12 21:45:57,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:57,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2021-08-12 21:45:57,061 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) [2021-08-12 21:45:57,062 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) [2021-08-12 21:45:57,062 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) [2021-08-12 21:45:57,062 INFO L348 CegarLoopForPetriNet]: 244 programPoint places, 1 predicate places. [2021-08-12 21:45:57,062 INFO L482 AbstractCegarLoop]: Abstraction has has 245 places, 146 transitions, 2790 flow [2021-08-12 21:45:57,062 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) [2021-08-12 21:45:57,062 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:57,062 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] [2021-08-12 21:45:57,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-08-12 21:45:57,062 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:57,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:57,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1665236624, now seen corresponding path program 1 times [2021-08-12 21:45:57,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:57,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009162934] [2021-08-12 21:45:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:57,071 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:57,073 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:57,077 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:57,077 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:57,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-08-12 21:45:57,077 WARN L235 ceAbstractionStarter]: 48 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:57,077 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 49 thread instances. [2021-08-12 21:45:57,119 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:57,119 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:57,119 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:57,119 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:57,119 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:57,119 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:57,120 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:57,120 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:57,120 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:57,120 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:57,121 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 251 places, 152 transitions, 2901 flow [2021-08-12 21:45:57,155 INFO L129 PetriNetUnfolder]: 0/299 cut-off events. [2021-08-12 21:45:57,155 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,155 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. [2021-08-12 21:45:57,155 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 152 transitions, 2901 flow [2021-08-12 21:45:57,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 249 places, 150 transitions, 2897 flow [2021-08-12 21:45:57,157 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:57,157 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,157 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:57,157 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:57,158 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:57,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:57,158 INFO L82 PathProgramCache]: Analyzing trace with hash 126499, now seen corresponding path program 1 times [2021-08-12 21:45:57,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:57,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072821778] [2021-08-12 21:45:57,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:57,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:57,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:57,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:57,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072821778] [2021-08-12 21:45:57,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072821778] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:57,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:57,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:57,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960673430] [2021-08-12 21:45:57,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:57,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:57,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:57,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:57,170 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 152 [2021-08-12 21:45:57,170 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) [2021-08-12 21:45:57,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:57,170 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 152 [2021-08-12 21:45:57,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:57,198 INFO L129 PetriNetUnfolder]: 0/149 cut-off events. [2021-08-12 21:45:57,198 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,198 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. [2021-08-12 21:45:57,199 INFO L132 encePairwiseOnDemand]: 150/152 looper letters, 0 selfloop transitions, 1 changer transitions 0/149 dead transitions. [2021-08-12 21:45:57,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 149 transitions, 2897 flow [2021-08-12 21:45:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2021-08-12 21:45:57,199 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9846491228070176 [2021-08-12 21:45:57,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2021-08-12 21:45:57,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2021-08-12 21:45:57,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:57,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2021-08-12 21:45:57,200 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) [2021-08-12 21:45:57,201 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) [2021-08-12 21:45:57,201 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) [2021-08-12 21:45:57,201 INFO L348 CegarLoopForPetriNet]: 249 programPoint places, 1 predicate places. [2021-08-12 21:45:57,201 INFO L482 AbstractCegarLoop]: Abstraction has has 250 places, 149 transitions, 2897 flow [2021-08-12 21:45:57,201 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) [2021-08-12 21:45:57,201 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:57,201 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] [2021-08-12 21:45:57,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-08-12 21:45:57,201 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:57,202 INFO L82 PathProgramCache]: Analyzing trace with hash -2123002503, now seen corresponding path program 1 times [2021-08-12 21:45:57,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:57,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026057172] [2021-08-12 21:45:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:57,210 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:57,212 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:57,217 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:57,217 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:57,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-08-12 21:45:57,217 WARN L235 ceAbstractionStarter]: 49 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:57,217 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 50 thread instances. [2021-08-12 21:45:57,259 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:57,259 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:57,259 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:57,260 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:57,260 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:57,260 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:57,260 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:57,260 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:57,260 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:57,260 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:57,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 256 places, 155 transitions, 3010 flow [2021-08-12 21:45:57,297 INFO L129 PetriNetUnfolder]: 0/305 cut-off events. [2021-08-12 21:45:57,297 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,297 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. [2021-08-12 21:45:57,297 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 155 transitions, 3010 flow [2021-08-12 21:45:57,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 254 places, 153 transitions, 3006 flow [2021-08-12 21:45:57,299 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:57,299 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,299 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:57,299 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:57,299 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:57,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:57,299 INFO L82 PathProgramCache]: Analyzing trace with hash 131459, now seen corresponding path program 1 times [2021-08-12 21:45:57,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:57,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402586310] [2021-08-12 21:45:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:57,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:57,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:57,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:57,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402586310] [2021-08-12 21:45:57,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402586310] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:57,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:57,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:57,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630831657] [2021-08-12 21:45:57,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:57,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:57,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:57,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:57,312 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 155 [2021-08-12 21:45:57,312 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) [2021-08-12 21:45:57,312 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:57,312 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 155 [2021-08-12 21:45:57,312 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:57,388 INFO L129 PetriNetUnfolder]: 0/152 cut-off events. [2021-08-12 21:45:57,389 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,389 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. [2021-08-12 21:45:57,389 INFO L132 encePairwiseOnDemand]: 153/155 looper letters, 0 selfloop transitions, 1 changer transitions 0/152 dead transitions. [2021-08-12 21:45:57,389 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 152 transitions, 3006 flow [2021-08-12 21:45:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2021-08-12 21:45:57,390 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9849462365591398 [2021-08-12 21:45:57,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2021-08-12 21:45:57,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2021-08-12 21:45:57,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:57,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2021-08-12 21:45:57,391 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) [2021-08-12 21:45:57,392 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) [2021-08-12 21:45:57,392 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) [2021-08-12 21:45:57,392 INFO L348 CegarLoopForPetriNet]: 254 programPoint places, 1 predicate places. [2021-08-12 21:45:57,392 INFO L482 AbstractCegarLoop]: Abstraction has has 255 places, 152 transitions, 3006 flow [2021-08-12 21:45:57,392 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) [2021-08-12 21:45:57,392 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:57,392 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] [2021-08-12 21:45:57,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-08-12 21:45:57,392 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:57,393 INFO L82 PathProgramCache]: Analyzing trace with hash 453703923, now seen corresponding path program 1 times [2021-08-12 21:45:57,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:57,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888043985] [2021-08-12 21:45:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:57,402 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:57,404 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:57,409 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:57,409 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:57,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-08-12 21:45:57,410 WARN L235 ceAbstractionStarter]: 50 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:57,410 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 51 thread instances. [2021-08-12 21:45:57,457 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:57,457 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:57,458 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:57,458 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:57,458 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:57,458 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:57,458 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:57,458 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:57,458 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:57,458 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:57,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 261 places, 158 transitions, 3121 flow [2021-08-12 21:45:57,508 INFO L129 PetriNetUnfolder]: 0/311 cut-off events. [2021-08-12 21:45:57,508 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,508 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. [2021-08-12 21:45:57,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 158 transitions, 3121 flow [2021-08-12 21:45:57,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 156 transitions, 3117 flow [2021-08-12 21:45:57,511 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:57,511 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,511 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:57,511 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:57,511 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:57,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:57,511 INFO L82 PathProgramCache]: Analyzing trace with hash 136515, now seen corresponding path program 1 times [2021-08-12 21:45:57,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:57,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115815964] [2021-08-12 21:45:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:57,522 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:57,522 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:57,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:57,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115815964] [2021-08-12 21:45:57,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115815964] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:57,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:57,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:57,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678383151] [2021-08-12 21:45:57,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:57,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:57,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:57,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:57,526 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 158 [2021-08-12 21:45:57,526 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) [2021-08-12 21:45:57,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:57,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 158 [2021-08-12 21:45:57,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:57,565 INFO L129 PetriNetUnfolder]: 0/155 cut-off events. [2021-08-12 21:45:57,566 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,566 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. [2021-08-12 21:45:57,566 INFO L132 encePairwiseOnDemand]: 156/158 looper letters, 0 selfloop transitions, 1 changer transitions 0/155 dead transitions. [2021-08-12 21:45:57,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 155 transitions, 3117 flow [2021-08-12 21:45:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:57,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2021-08-12 21:45:57,567 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9852320675105485 [2021-08-12 21:45:57,567 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2021-08-12 21:45:57,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2021-08-12 21:45:57,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:57,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2021-08-12 21:45:57,568 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) [2021-08-12 21:45:57,569 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) [2021-08-12 21:45:57,569 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) [2021-08-12 21:45:57,569 INFO L348 CegarLoopForPetriNet]: 259 programPoint places, 1 predicate places. [2021-08-12 21:45:57,569 INFO L482 AbstractCegarLoop]: Abstraction has has 260 places, 155 transitions, 3117 flow [2021-08-12 21:45:57,569 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) [2021-08-12 21:45:57,569 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:57,569 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:45:57,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-08-12 21:45:57,569 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:57,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:57,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1640419729, now seen corresponding path program 1 times [2021-08-12 21:45:57,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:57,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287842184] [2021-08-12 21:45:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:57,579 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:57,581 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:57,586 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:57,586 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:57,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-08-12 21:45:57,586 WARN L235 ceAbstractionStarter]: 51 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:57,587 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 52 thread instances. [2021-08-12 21:45:57,634 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:57,635 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:57,635 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:57,635 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:57,635 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:57,635 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:57,635 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:57,635 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:57,635 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:57,635 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:57,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 266 places, 161 transitions, 3234 flow [2021-08-12 21:45:57,683 INFO L129 PetriNetUnfolder]: 0/317 cut-off events. [2021-08-12 21:45:57,683 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,684 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. [2021-08-12 21:45:57,684 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 161 transitions, 3234 flow [2021-08-12 21:45:57,685 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 159 transitions, 3230 flow [2021-08-12 21:45:57,686 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:57,686 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,686 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:57,686 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:57,686 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:57,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:57,686 INFO L82 PathProgramCache]: Analyzing trace with hash 141667, now seen corresponding path program 1 times [2021-08-12 21:45:57,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:57,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223204419] [2021-08-12 21:45:57,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:57,700 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:57,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:57,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:57,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223204419] [2021-08-12 21:45:57,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223204419] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:57,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:57,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:57,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363322975] [2021-08-12 21:45:57,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:57,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:57,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:57,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:57,704 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 161 [2021-08-12 21:45:57,704 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) [2021-08-12 21:45:57,704 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:57,704 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 161 [2021-08-12 21:45:57,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:57,743 INFO L129 PetriNetUnfolder]: 0/158 cut-off events. [2021-08-12 21:45:57,743 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,743 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. [2021-08-12 21:45:57,744 INFO L132 encePairwiseOnDemand]: 159/161 looper letters, 0 selfloop transitions, 1 changer transitions 0/158 dead transitions. [2021-08-12 21:45:57,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 158 transitions, 3230 flow [2021-08-12 21:45:57,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2021-08-12 21:45:57,745 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9855072463768116 [2021-08-12 21:45:57,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2021-08-12 21:45:57,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2021-08-12 21:45:57,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:57,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2021-08-12 21:45:57,746 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) [2021-08-12 21:45:57,746 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) [2021-08-12 21:45:57,746 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) [2021-08-12 21:45:57,746 INFO L348 CegarLoopForPetriNet]: 264 programPoint places, 1 predicate places. [2021-08-12 21:45:57,747 INFO L482 AbstractCegarLoop]: Abstraction has has 265 places, 158 transitions, 3230 flow [2021-08-12 21:45:57,747 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) [2021-08-12 21:45:57,747 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:57,747 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] [2021-08-12 21:45:57,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-08-12 21:45:57,747 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:57,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:57,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1202665654, now seen corresponding path program 1 times [2021-08-12 21:45:57,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:57,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113289690] [2021-08-12 21:45:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:57,758 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:57,760 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:57,765 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:57,765 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:57,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-08-12 21:45:57,766 WARN L235 ceAbstractionStarter]: 52 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:57,766 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 53 thread instances. [2021-08-12 21:45:57,812 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:57,812 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:57,813 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:57,813 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:57,813 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:57,813 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:57,813 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:57,813 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:57,813 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:57,813 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:57,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 271 places, 164 transitions, 3349 flow [2021-08-12 21:45:57,855 INFO L129 PetriNetUnfolder]: 0/323 cut-off events. [2021-08-12 21:45:57,856 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,856 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. [2021-08-12 21:45:57,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 164 transitions, 3349 flow [2021-08-12 21:45:57,858 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 162 transitions, 3345 flow [2021-08-12 21:45:57,858 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:57,858 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,858 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:57,858 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:57,858 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:57,858 INFO L82 PathProgramCache]: Analyzing trace with hash 146915, now seen corresponding path program 1 times [2021-08-12 21:45:57,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:57,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843837579] [2021-08-12 21:45:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:57,868 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:57,868 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:57,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:57,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843837579] [2021-08-12 21:45:57,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843837579] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:57,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:57,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:57,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814413374] [2021-08-12 21:45:57,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:57,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:57,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:57,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:57,871 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 164 [2021-08-12 21:45:57,872 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) [2021-08-12 21:45:57,872 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:57,872 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 164 [2021-08-12 21:45:57,872 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:57,905 INFO L129 PetriNetUnfolder]: 0/161 cut-off events. [2021-08-12 21:45:57,905 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:57,905 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. [2021-08-12 21:45:57,906 INFO L132 encePairwiseOnDemand]: 162/164 looper letters, 0 selfloop transitions, 1 changer transitions 0/161 dead transitions. [2021-08-12 21:45:57,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 161 transitions, 3345 flow [2021-08-12 21:45:57,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:57,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2021-08-12 21:45:57,907 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9857723577235772 [2021-08-12 21:45:57,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2021-08-12 21:45:57,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2021-08-12 21:45:57,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:57,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2021-08-12 21:45:57,907 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) [2021-08-12 21:45:57,908 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) [2021-08-12 21:45:57,908 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) [2021-08-12 21:45:57,908 INFO L348 CegarLoopForPetriNet]: 269 programPoint places, 1 predicate places. [2021-08-12 21:45:57,908 INFO L482 AbstractCegarLoop]: Abstraction has has 270 places, 161 transitions, 3345 flow [2021-08-12 21:45:57,908 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) [2021-08-12 21:45:57,908 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:57,908 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] [2021-08-12 21:45:57,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-08-12 21:45:57,909 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:57,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:57,909 INFO L82 PathProgramCache]: Analyzing trace with hash -355666955, now seen corresponding path program 1 times [2021-08-12 21:45:57,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:57,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465625560] [2021-08-12 21:45:57,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:57,919 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:57,920 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:57,926 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:57,927 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:57,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-08-12 21:45:57,927 WARN L235 ceAbstractionStarter]: 53 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:57,927 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 54 thread instances. [2021-08-12 21:45:57,971 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:57,971 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:57,972 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:57,972 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:57,972 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:57,972 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:57,972 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:57,972 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:57,972 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:57,972 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:57,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 276 places, 167 transitions, 3466 flow [2021-08-12 21:45:58,018 INFO L129 PetriNetUnfolder]: 0/329 cut-off events. [2021-08-12 21:45:58,018 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,018 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. [2021-08-12 21:45:58,018 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 167 transitions, 3466 flow [2021-08-12 21:45:58,020 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 274 places, 165 transitions, 3462 flow [2021-08-12 21:45:58,020 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:58,020 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,020 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:58,021 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:58,021 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash 152259, now seen corresponding path program 1 times [2021-08-12 21:45:58,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:58,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051809970] [2021-08-12 21:45:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:58,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:58,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:58,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:58,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051809970] [2021-08-12 21:45:58,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051809970] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:58,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:58,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:58,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553349770] [2021-08-12 21:45:58,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:58,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:58,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:58,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:58,033 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 167 [2021-08-12 21:45:58,033 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) [2021-08-12 21:45:58,033 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:58,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 167 [2021-08-12 21:45:58,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:58,111 INFO L129 PetriNetUnfolder]: 0/164 cut-off events. [2021-08-12 21:45:58,111 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,111 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. [2021-08-12 21:45:58,112 INFO L132 encePairwiseOnDemand]: 165/167 looper letters, 0 selfloop transitions, 1 changer transitions 0/164 dead transitions. [2021-08-12 21:45:58,112 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 164 transitions, 3462 flow [2021-08-12 21:45:58,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:58,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2021-08-12 21:45:58,112 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9860279441117764 [2021-08-12 21:45:58,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2021-08-12 21:45:58,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2021-08-12 21:45:58,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:58,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2021-08-12 21:45:58,113 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) [2021-08-12 21:45:58,114 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) [2021-08-12 21:45:58,114 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) [2021-08-12 21:45:58,114 INFO L348 CegarLoopForPetriNet]: 274 programPoint places, 1 predicate places. [2021-08-12 21:45:58,114 INFO L482 AbstractCegarLoop]: Abstraction has has 275 places, 164 transitions, 3462 flow [2021-08-12 21:45:58,114 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) [2021-08-12 21:45:58,114 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:58,114 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] [2021-08-12 21:45:58,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-08-12 21:45:58,114 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:58,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:58,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1647836473, now seen corresponding path program 1 times [2021-08-12 21:45:58,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:58,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555277203] [2021-08-12 21:45:58,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:58,123 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:58,125 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:58,130 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:58,130 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:58,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-08-12 21:45:58,130 WARN L235 ceAbstractionStarter]: 54 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:58,130 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 55 thread instances. [2021-08-12 21:45:58,176 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:58,177 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:58,177 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:58,177 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:58,177 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:58,177 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:58,177 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:58,177 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:58,177 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:58,177 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:58,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 281 places, 170 transitions, 3585 flow [2021-08-12 21:45:58,221 INFO L129 PetriNetUnfolder]: 0/335 cut-off events. [2021-08-12 21:45:58,222 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,222 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. [2021-08-12 21:45:58,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 170 transitions, 3585 flow [2021-08-12 21:45:58,223 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 279 places, 168 transitions, 3581 flow [2021-08-12 21:45:58,224 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:58,224 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,224 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:58,224 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:58,224 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:58,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:58,224 INFO L82 PathProgramCache]: Analyzing trace with hash 157699, now seen corresponding path program 1 times [2021-08-12 21:45:58,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:58,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894188520] [2021-08-12 21:45:58,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:58,234 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:58,235 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:58,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:58,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894188520] [2021-08-12 21:45:58,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894188520] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:58,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:58,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:58,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515323049] [2021-08-12 21:45:58,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:58,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:58,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:58,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:58,238 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 170 [2021-08-12 21:45:58,238 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) [2021-08-12 21:45:58,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:58,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 170 [2021-08-12 21:45:58,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:58,272 INFO L129 PetriNetUnfolder]: 0/167 cut-off events. [2021-08-12 21:45:58,273 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,273 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. [2021-08-12 21:45:58,273 INFO L132 encePairwiseOnDemand]: 168/170 looper letters, 0 selfloop transitions, 1 changer transitions 0/167 dead transitions. [2021-08-12 21:45:58,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 167 transitions, 3581 flow [2021-08-12 21:45:58,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2021-08-12 21:45:58,274 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9862745098039216 [2021-08-12 21:45:58,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2021-08-12 21:45:58,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2021-08-12 21:45:58,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:58,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2021-08-12 21:45:58,275 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) [2021-08-12 21:45:58,275 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) [2021-08-12 21:45:58,275 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) [2021-08-12 21:45:58,275 INFO L348 CegarLoopForPetriNet]: 279 programPoint places, 1 predicate places. [2021-08-12 21:45:58,275 INFO L482 AbstractCegarLoop]: Abstraction has has 280 places, 167 transitions, 3581 flow [2021-08-12 21:45:58,276 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) [2021-08-12 21:45:58,276 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:58,276 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] [2021-08-12 21:45:58,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-08-12 21:45:58,276 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:58,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1816418341, now seen corresponding path program 1 times [2021-08-12 21:45:58,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:58,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425919246] [2021-08-12 21:45:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:58,286 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:58,288 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:58,294 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:58,294 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:58,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-08-12 21:45:58,294 WARN L235 ceAbstractionStarter]: 55 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:58,294 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 56 thread instances. [2021-08-12 21:45:58,340 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:58,340 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:58,341 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:58,341 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:58,341 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:58,341 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:58,341 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:58,341 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:58,341 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:58,341 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:58,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 286 places, 173 transitions, 3706 flow [2021-08-12 21:45:58,389 INFO L129 PetriNetUnfolder]: 0/341 cut-off events. [2021-08-12 21:45:58,389 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,390 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. [2021-08-12 21:45:58,390 INFO L82 GeneralOperation]: Start removeDead. Operand has 286 places, 173 transitions, 3706 flow [2021-08-12 21:45:58,391 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 284 places, 171 transitions, 3702 flow [2021-08-12 21:45:58,392 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:58,392 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,392 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:58,392 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:58,392 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:58,392 INFO L82 PathProgramCache]: Analyzing trace with hash 163235, now seen corresponding path program 1 times [2021-08-12 21:45:58,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:58,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998128879] [2021-08-12 21:45:58,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:58,403 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:58,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:58,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:58,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998128879] [2021-08-12 21:45:58,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998128879] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:58,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:58,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:58,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019615757] [2021-08-12 21:45:58,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:58,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:58,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:58,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:58,407 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 173 [2021-08-12 21:45:58,408 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) [2021-08-12 21:45:58,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:58,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 173 [2021-08-12 21:45:58,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:58,450 INFO L129 PetriNetUnfolder]: 0/170 cut-off events. [2021-08-12 21:45:58,450 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,450 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. [2021-08-12 21:45:58,450 INFO L132 encePairwiseOnDemand]: 171/173 looper letters, 0 selfloop transitions, 1 changer transitions 0/170 dead transitions. [2021-08-12 21:45:58,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 170 transitions, 3702 flow [2021-08-12 21:45:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2021-08-12 21:45:58,451 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9865125240847784 [2021-08-12 21:45:58,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2021-08-12 21:45:58,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2021-08-12 21:45:58,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:58,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2021-08-12 21:45:58,452 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) [2021-08-12 21:45:58,452 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) [2021-08-12 21:45:58,452 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) [2021-08-12 21:45:58,453 INFO L348 CegarLoopForPetriNet]: 284 programPoint places, 1 predicate places. [2021-08-12 21:45:58,453 INFO L482 AbstractCegarLoop]: Abstraction has has 285 places, 170 transitions, 3702 flow [2021-08-12 21:45:58,453 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) [2021-08-12 21:45:58,453 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:58,453 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] [2021-08-12 21:45:58,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-08-12 21:45:58,453 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:58,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:58,453 INFO L82 PathProgramCache]: Analyzing trace with hash 960217852, now seen corresponding path program 1 times [2021-08-12 21:45:58,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:58,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579151792] [2021-08-12 21:45:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:58,464 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:58,465 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:58,471 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:58,471 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:58,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-08-12 21:45:58,471 WARN L235 ceAbstractionStarter]: 56 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:58,471 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 57 thread instances. [2021-08-12 21:45:58,517 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:58,517 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:58,517 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:58,517 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:58,518 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:58,518 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:58,518 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:58,518 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:58,518 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:58,518 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:58,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 291 places, 176 transitions, 3829 flow [2021-08-12 21:45:58,565 INFO L129 PetriNetUnfolder]: 0/347 cut-off events. [2021-08-12 21:45:58,566 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,566 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. [2021-08-12 21:45:58,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 176 transitions, 3829 flow [2021-08-12 21:45:58,568 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 174 transitions, 3825 flow [2021-08-12 21:45:58,568 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:58,568 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,568 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:58,568 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:58,568 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:58,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:58,568 INFO L82 PathProgramCache]: Analyzing trace with hash 168867, now seen corresponding path program 1 times [2021-08-12 21:45:58,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:58,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179708821] [2021-08-12 21:45:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:58,579 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:58,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:58,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:58,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179708821] [2021-08-12 21:45:58,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179708821] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:58,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:58,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:58,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443428118] [2021-08-12 21:45:58,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:58,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:58,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:58,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:58,582 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 176 [2021-08-12 21:45:58,582 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) [2021-08-12 21:45:58,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:58,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 176 [2021-08-12 21:45:58,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:58,621 INFO L129 PetriNetUnfolder]: 0/173 cut-off events. [2021-08-12 21:45:58,621 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,621 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. [2021-08-12 21:45:58,621 INFO L132 encePairwiseOnDemand]: 174/176 looper letters, 0 selfloop transitions, 1 changer transitions 0/173 dead transitions. [2021-08-12 21:45:58,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 173 transitions, 3825 flow [2021-08-12 21:45:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:58,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2021-08-12 21:45:58,622 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9867424242424242 [2021-08-12 21:45:58,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2021-08-12 21:45:58,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2021-08-12 21:45:58,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:58,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2021-08-12 21:45:58,623 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) [2021-08-12 21:45:58,623 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) [2021-08-12 21:45:58,623 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) [2021-08-12 21:45:58,624 INFO L348 CegarLoopForPetriNet]: 289 programPoint places, 1 predicate places. [2021-08-12 21:45:58,624 INFO L482 AbstractCegarLoop]: Abstraction has has 290 places, 173 transitions, 3825 flow [2021-08-12 21:45:58,624 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) [2021-08-12 21:45:58,624 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:58,624 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] [2021-08-12 21:45:58,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-08-12 21:45:58,624 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:58,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:58,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1458020769, now seen corresponding path program 1 times [2021-08-12 21:45:58,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:58,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968856562] [2021-08-12 21:45:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:58,635 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:58,637 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:58,643 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:58,643 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:58,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-08-12 21:45:58,643 WARN L235 ceAbstractionStarter]: 57 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:58,643 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 58 thread instances. [2021-08-12 21:45:58,689 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:58,689 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:58,689 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:58,689 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:58,689 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:58,689 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:58,689 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:58,689 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:58,689 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:58,690 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:58,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 296 places, 179 transitions, 3954 flow [2021-08-12 21:45:58,779 INFO L129 PetriNetUnfolder]: 0/353 cut-off events. [2021-08-12 21:45:58,779 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,779 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. [2021-08-12 21:45:58,779 INFO L82 GeneralOperation]: Start removeDead. Operand has 296 places, 179 transitions, 3954 flow [2021-08-12 21:45:58,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 177 transitions, 3950 flow [2021-08-12 21:45:58,782 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:58,782 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,782 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:58,782 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:58,782 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:58,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:58,782 INFO L82 PathProgramCache]: Analyzing trace with hash 174595, now seen corresponding path program 1 times [2021-08-12 21:45:58,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:58,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676958994] [2021-08-12 21:45:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:58,792 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:58,792 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:58,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:58,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676958994] [2021-08-12 21:45:58,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676958994] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:58,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:58,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:58,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995309890] [2021-08-12 21:45:58,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:58,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:58,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:58,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:58,795 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 179 [2021-08-12 21:45:58,796 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) [2021-08-12 21:45:58,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:58,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 179 [2021-08-12 21:45:58,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:58,835 INFO L129 PetriNetUnfolder]: 0/176 cut-off events. [2021-08-12 21:45:58,835 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,835 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. [2021-08-12 21:45:58,835 INFO L132 encePairwiseOnDemand]: 177/179 looper letters, 0 selfloop transitions, 1 changer transitions 0/176 dead transitions. [2021-08-12 21:45:58,835 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 176 transitions, 3950 flow [2021-08-12 21:45:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 530 transitions. [2021-08-12 21:45:58,836 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9869646182495344 [2021-08-12 21:45:58,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 530 transitions. [2021-08-12 21:45:58,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 530 transitions. [2021-08-12 21:45:58,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:58,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 530 transitions. [2021-08-12 21:45:58,837 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) [2021-08-12 21:45:58,837 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) [2021-08-12 21:45:58,837 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) [2021-08-12 21:45:58,838 INFO L348 CegarLoopForPetriNet]: 294 programPoint places, 1 predicate places. [2021-08-12 21:45:58,838 INFO L482 AbstractCegarLoop]: Abstraction has has 295 places, 176 transitions, 3950 flow [2021-08-12 21:45:58,838 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) [2021-08-12 21:45:58,838 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:58,838 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] [2021-08-12 21:45:58,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-08-12 21:45:58,838 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:58,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:58,838 INFO L82 PathProgramCache]: Analyzing trace with hash 734709375, now seen corresponding path program 1 times [2021-08-12 21:45:58,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:58,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145087936] [2021-08-12 21:45:58,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:58,848 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:58,850 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:58,855 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:58,856 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:58,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-08-12 21:45:58,856 WARN L235 ceAbstractionStarter]: 58 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:58,856 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 59 thread instances. [2021-08-12 21:45:58,901 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:58,901 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:58,902 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:58,902 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:58,902 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:58,902 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:58,902 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:58,902 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:58,902 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:58,902 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:58,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 301 places, 182 transitions, 4081 flow [2021-08-12 21:45:58,952 INFO L129 PetriNetUnfolder]: 0/359 cut-off events. [2021-08-12 21:45:58,952 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,952 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. [2021-08-12 21:45:58,952 INFO L82 GeneralOperation]: Start removeDead. Operand has 301 places, 182 transitions, 4081 flow [2021-08-12 21:45:58,954 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 180 transitions, 4077 flow [2021-08-12 21:45:58,954 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:58,954 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:58,954 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:58,954 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:58,954 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:58,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:58,955 INFO L82 PathProgramCache]: Analyzing trace with hash 180419, now seen corresponding path program 1 times [2021-08-12 21:45:58,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:58,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038904815] [2021-08-12 21:45:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:58,965 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:58,965 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:58,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:58,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038904815] [2021-08-12 21:45:58,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038904815] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:58,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:58,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:58,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728141732] [2021-08-12 21:45:58,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:58,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:58,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:58,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:58,968 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 182 [2021-08-12 21:45:58,968 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) [2021-08-12 21:45:58,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:58,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 182 [2021-08-12 21:45:58,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:59,007 INFO L129 PetriNetUnfolder]: 0/179 cut-off events. [2021-08-12 21:45:59,008 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:59,008 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. [2021-08-12 21:45:59,008 INFO L132 encePairwiseOnDemand]: 180/182 looper letters, 0 selfloop transitions, 1 changer transitions 0/179 dead transitions. [2021-08-12 21:45:59,008 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 179 transitions, 4077 flow [2021-08-12 21:45:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2021-08-12 21:45:59,010 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9871794871794872 [2021-08-12 21:45:59,010 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2021-08-12 21:45:59,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2021-08-12 21:45:59,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:59,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2021-08-12 21:45:59,011 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) [2021-08-12 21:45:59,012 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) [2021-08-12 21:45:59,012 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) [2021-08-12 21:45:59,012 INFO L348 CegarLoopForPetriNet]: 299 programPoint places, 1 predicate places. [2021-08-12 21:45:59,012 INFO L482 AbstractCegarLoop]: Abstraction has has 300 places, 179 transitions, 4077 flow [2021-08-12 21:45:59,012 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) [2021-08-12 21:45:59,012 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:59,012 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] [2021-08-12 21:45:59,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-08-12 21:45:59,012 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:59,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:59,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2013285399, now seen corresponding path program 1 times [2021-08-12 21:45:59,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:59,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317921459] [2021-08-12 21:45:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:59,023 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:59,027 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:59,033 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:59,033 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:59,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-08-12 21:45:59,034 WARN L235 ceAbstractionStarter]: 59 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:59,034 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 60 thread instances. [2021-08-12 21:45:59,082 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:59,082 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:59,083 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:59,083 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:59,083 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:59,083 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:59,083 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:59,083 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:59,083 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:59,083 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:59,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 306 places, 185 transitions, 4210 flow [2021-08-12 21:45:59,135 INFO L129 PetriNetUnfolder]: 0/365 cut-off events. [2021-08-12 21:45:59,135 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:59,135 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. [2021-08-12 21:45:59,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 306 places, 185 transitions, 4210 flow [2021-08-12 21:45:59,137 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 183 transitions, 4206 flow [2021-08-12 21:45:59,138 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:59,138 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:59,138 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:59,138 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:59,138 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:59,138 INFO L82 PathProgramCache]: Analyzing trace with hash 186339, now seen corresponding path program 1 times [2021-08-12 21:45:59,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:59,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910064154] [2021-08-12 21:45:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:59,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:59,149 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:59,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:59,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910064154] [2021-08-12 21:45:59,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910064154] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:59,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:59,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:59,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516944690] [2021-08-12 21:45:59,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:59,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:59,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:59,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:59,152 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 185 [2021-08-12 21:45:59,153 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) [2021-08-12 21:45:59,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:59,153 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 185 [2021-08-12 21:45:59,153 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:59,193 INFO L129 PetriNetUnfolder]: 0/182 cut-off events. [2021-08-12 21:45:59,193 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:59,193 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. [2021-08-12 21:45:59,194 INFO L132 encePairwiseOnDemand]: 183/185 looper letters, 0 selfloop transitions, 1 changer transitions 0/182 dead transitions. [2021-08-12 21:45:59,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 182 transitions, 4206 flow [2021-08-12 21:45:59,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2021-08-12 21:45:59,196 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9873873873873874 [2021-08-12 21:45:59,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2021-08-12 21:45:59,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2021-08-12 21:45:59,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:59,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2021-08-12 21:45:59,197 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) [2021-08-12 21:45:59,197 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) [2021-08-12 21:45:59,198 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) [2021-08-12 21:45:59,198 INFO L348 CegarLoopForPetriNet]: 304 programPoint places, 1 predicate places. [2021-08-12 21:45:59,198 INFO L482 AbstractCegarLoop]: Abstraction has has 305 places, 182 transitions, 4206 flow [2021-08-12 21:45:59,198 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) [2021-08-12 21:45:59,198 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:59,199 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] [2021-08-12 21:45:59,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-08-12 21:45:59,199 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:59,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:59,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1893663810, now seen corresponding path program 1 times [2021-08-12 21:45:59,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:59,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387798873] [2021-08-12 21:45:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:59,211 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:59,213 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:59,220 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:59,220 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:59,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-08-12 21:45:59,221 WARN L235 ceAbstractionStarter]: 60 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:59,221 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 61 thread instances. [2021-08-12 21:45:59,268 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:59,268 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:59,269 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:59,269 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:59,269 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:59,269 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:59,269 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:59,269 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:59,269 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:59,269 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:59,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 311 places, 188 transitions, 4341 flow [2021-08-12 21:45:59,322 INFO L129 PetriNetUnfolder]: 0/371 cut-off events. [2021-08-12 21:45:59,322 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:59,322 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. [2021-08-12 21:45:59,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 311 places, 188 transitions, 4341 flow [2021-08-12 21:45:59,324 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 309 places, 186 transitions, 4337 flow [2021-08-12 21:45:59,325 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:59,326 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:59,326 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:59,326 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:59,326 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:59,326 INFO L82 PathProgramCache]: Analyzing trace with hash 192355, now seen corresponding path program 1 times [2021-08-12 21:45:59,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:59,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376899379] [2021-08-12 21:45:59,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:59,378 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:59,379 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:59,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:59,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376899379] [2021-08-12 21:45:59,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376899379] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:59,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:59,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:59,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407778760] [2021-08-12 21:45:59,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:59,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:59,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:59,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:59,382 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 188 [2021-08-12 21:45:59,382 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) [2021-08-12 21:45:59,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:59,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 188 [2021-08-12 21:45:59,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:59,423 INFO L129 PetriNetUnfolder]: 0/185 cut-off events. [2021-08-12 21:45:59,423 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:59,423 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. [2021-08-12 21:45:59,424 INFO L132 encePairwiseOnDemand]: 186/188 looper letters, 0 selfloop transitions, 1 changer transitions 0/185 dead transitions. [2021-08-12 21:45:59,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 185 transitions, 4337 flow [2021-08-12 21:45:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:59,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:59,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2021-08-12 21:45:59,424 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9875886524822695 [2021-08-12 21:45:59,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2021-08-12 21:45:59,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2021-08-12 21:45:59,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:59,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2021-08-12 21:45:59,425 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) [2021-08-12 21:45:59,426 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) [2021-08-12 21:45:59,426 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) [2021-08-12 21:45:59,426 INFO L348 CegarLoopForPetriNet]: 309 programPoint places, 1 predicate places. [2021-08-12 21:45:59,426 INFO L482 AbstractCegarLoop]: Abstraction has has 310 places, 185 transitions, 4337 flow [2021-08-12 21:45:59,426 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) [2021-08-12 21:45:59,426 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:59,426 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] [2021-08-12 21:45:59,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-08-12 21:45:59,426 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:59,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:59,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1896631683, now seen corresponding path program 1 times [2021-08-12 21:45:59,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:59,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411514245] [2021-08-12 21:45:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:59,437 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:59,439 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:59,445 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:59,445 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:59,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-08-12 21:45:59,445 WARN L235 ceAbstractionStarter]: 61 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:59,445 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 62 thread instances. [2021-08-12 21:45:59,492 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:59,493 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:59,493 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:59,493 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:59,493 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:59,493 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:59,493 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:59,493 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:59,493 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:59,493 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:59,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 316 places, 191 transitions, 4474 flow [2021-08-12 21:45:59,574 INFO L129 PetriNetUnfolder]: 0/377 cut-off events. [2021-08-12 21:45:59,575 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:59,575 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. [2021-08-12 21:45:59,575 INFO L82 GeneralOperation]: Start removeDead. Operand has 316 places, 191 transitions, 4474 flow [2021-08-12 21:45:59,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 314 places, 189 transitions, 4470 flow [2021-08-12 21:45:59,577 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:45:59,577 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:59,577 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:59,577 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:59,577 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:59,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:59,578 INFO L82 PathProgramCache]: Analyzing trace with hash 198467, now seen corresponding path program 1 times [2021-08-12 21:45:59,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:59,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106390237] [2021-08-12 21:45:59,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:59,589 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:59,589 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:59,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:59,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106390237] [2021-08-12 21:45:59,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106390237] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:59,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:59,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:59,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890098538] [2021-08-12 21:45:59,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:59,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:59,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:59,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:59,592 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 191 [2021-08-12 21:45:59,592 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) [2021-08-12 21:45:59,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:59,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 191 [2021-08-12 21:45:59,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:59,636 INFO L129 PetriNetUnfolder]: 0/188 cut-off events. [2021-08-12 21:45:59,637 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:59,637 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. [2021-08-12 21:45:59,637 INFO L132 encePairwiseOnDemand]: 189/191 looper letters, 0 selfloop transitions, 1 changer transitions 0/188 dead transitions. [2021-08-12 21:45:59,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 188 transitions, 4470 flow [2021-08-12 21:45:59,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2021-08-12 21:45:59,638 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.987783595113438 [2021-08-12 21:45:59,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2021-08-12 21:45:59,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2021-08-12 21:45:59,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:59,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2021-08-12 21:45:59,639 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) [2021-08-12 21:45:59,639 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) [2021-08-12 21:45:59,639 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) [2021-08-12 21:45:59,639 INFO L348 CegarLoopForPetriNet]: 314 programPoint places, 1 predicate places. [2021-08-12 21:45:59,639 INFO L482 AbstractCegarLoop]: Abstraction has has 315 places, 188 transitions, 4470 flow [2021-08-12 21:45:59,640 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) [2021-08-12 21:45:59,640 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:59,640 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] [2021-08-12 21:45:59,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-08-12 21:45:59,640 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:59,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:59,640 INFO L82 PathProgramCache]: Analyzing trace with hash 617363653, now seen corresponding path program 1 times [2021-08-12 21:45:59,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:59,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195535780] [2021-08-12 21:45:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:59,651 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:59,654 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:59,662 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:59,662 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:59,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-08-12 21:45:59,662 WARN L235 ceAbstractionStarter]: 62 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:59,662 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 63 thread instances. [2021-08-12 21:45:59,711 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:59,711 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:59,711 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:59,711 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:59,711 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:59,711 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:59,711 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:59,711 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:59,711 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:59,711 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:59,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 321 places, 194 transitions, 4609 flow [2021-08-12 21:45:59,770 INFO L129 PetriNetUnfolder]: 0/383 cut-off events. [2021-08-12 21:45:59,770 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:59,770 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. [2021-08-12 21:45:59,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 194 transitions, 4609 flow [2021-08-12 21:45:59,773 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 319 places, 192 transitions, 4605 flow [2021-08-12 21:45:59,773 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:45:59,773 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:59,773 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:59,773 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:45:59,773 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:59,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:59,773 INFO L82 PathProgramCache]: Analyzing trace with hash 204675, now seen corresponding path program 1 times [2021-08-12 21:45:59,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:59,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535297852] [2021-08-12 21:45:59,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:45:59,785 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:45:59,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:45:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:45:59,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:45:59,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535297852] [2021-08-12 21:45:59,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535297852] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:45:59,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:45:59,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:45:59,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804349399] [2021-08-12 21:45:59,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:45:59,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:45:59,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:45:59,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:45:59,788 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 194 [2021-08-12 21:45:59,788 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) [2021-08-12 21:45:59,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:45:59,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 194 [2021-08-12 21:45:59,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:45:59,832 INFO L129 PetriNetUnfolder]: 0/191 cut-off events. [2021-08-12 21:45:59,832 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:45:59,832 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. [2021-08-12 21:45:59,833 INFO L132 encePairwiseOnDemand]: 192/194 looper letters, 0 selfloop transitions, 1 changer transitions 0/191 dead transitions. [2021-08-12 21:45:59,833 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 191 transitions, 4605 flow [2021-08-12 21:45:59,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:45:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:45:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2021-08-12 21:45:59,833 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9879725085910653 [2021-08-12 21:45:59,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2021-08-12 21:45:59,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2021-08-12 21:45:59,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:45:59,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2021-08-12 21:45:59,834 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) [2021-08-12 21:45:59,835 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) [2021-08-12 21:45:59,835 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) [2021-08-12 21:45:59,835 INFO L348 CegarLoopForPetriNet]: 319 programPoint places, 1 predicate places. [2021-08-12 21:45:59,835 INFO L482 AbstractCegarLoop]: Abstraction has has 320 places, 191 transitions, 4605 flow [2021-08-12 21:45:59,836 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) [2021-08-12 21:45:59,836 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:45:59,836 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] [2021-08-12 21:45:59,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-08-12 21:45:59,836 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:45:59,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:45:59,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1826160861, now seen corresponding path program 1 times [2021-08-12 21:45:59,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:45:59,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503309830] [2021-08-12 21:45:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:45:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:59,848 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:45:59,854 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:45:59,861 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:45:59,861 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:45:59,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-08-12 21:45:59,861 WARN L235 ceAbstractionStarter]: 63 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:45:59,861 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 64 thread instances. [2021-08-12 21:45:59,911 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:45:59,911 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:45:59,912 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:45:59,912 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:45:59,912 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:45:59,912 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:45:59,912 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:45:59,912 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:45:59,912 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:45:59,912 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:45:59,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 326 places, 197 transitions, 4746 flow [2021-08-12 21:46:00,035 INFO L129 PetriNetUnfolder]: 0/389 cut-off events. [2021-08-12 21:46:00,035 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:00,035 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. [2021-08-12 21:46:00,035 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 197 transitions, 4746 flow [2021-08-12 21:46:00,037 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 195 transitions, 4742 flow [2021-08-12 21:46:00,038 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:00,038 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:00,038 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:00,038 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:00,038 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:00,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:00,038 INFO L82 PathProgramCache]: Analyzing trace with hash 210979, now seen corresponding path program 1 times [2021-08-12 21:46:00,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:00,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147170278] [2021-08-12 21:46:00,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:00,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:00,057 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:00,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:00,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147170278] [2021-08-12 21:46:00,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147170278] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:00,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:00,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:00,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354566276] [2021-08-12 21:46:00,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:00,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:00,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:00,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:00,063 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 197 [2021-08-12 21:46:00,063 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) [2021-08-12 21:46:00,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:00,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 197 [2021-08-12 21:46:00,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:00,119 INFO L129 PetriNetUnfolder]: 0/194 cut-off events. [2021-08-12 21:46:00,119 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:00,120 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. [2021-08-12 21:46:00,121 INFO L132 encePairwiseOnDemand]: 195/197 looper letters, 0 selfloop transitions, 1 changer transitions 0/194 dead transitions. [2021-08-12 21:46:00,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 194 transitions, 4742 flow [2021-08-12 21:46:00,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:00,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2021-08-12 21:46:00,122 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.988155668358714 [2021-08-12 21:46:00,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2021-08-12 21:46:00,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2021-08-12 21:46:00,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:00,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2021-08-12 21:46:00,124 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) [2021-08-12 21:46:00,125 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) [2021-08-12 21:46:00,126 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) [2021-08-12 21:46:00,126 INFO L348 CegarLoopForPetriNet]: 324 programPoint places, 1 predicate places. [2021-08-12 21:46:00,126 INFO L482 AbstractCegarLoop]: Abstraction has has 325 places, 194 transitions, 4742 flow [2021-08-12 21:46:00,126 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) [2021-08-12 21:46:00,126 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:00,127 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] [2021-08-12 21:46:00,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-08-12 21:46:00,128 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:00,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:00,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1666195320, now seen corresponding path program 1 times [2021-08-12 21:46:00,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:00,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144417855] [2021-08-12 21:46:00,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:00,146 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:00,149 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:00,158 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:00,159 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:00,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-08-12 21:46:00,160 WARN L235 ceAbstractionStarter]: 64 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:00,160 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 65 thread instances. [2021-08-12 21:46:00,217 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:00,218 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:00,218 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:00,218 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:00,218 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:00,218 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:00,218 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:00,218 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:00,218 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:00,218 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:00,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 331 places, 200 transitions, 4885 flow [2021-08-12 21:46:00,295 INFO L129 PetriNetUnfolder]: 0/395 cut-off events. [2021-08-12 21:46:00,295 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:00,295 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. [2021-08-12 21:46:00,295 INFO L82 GeneralOperation]: Start removeDead. Operand has 331 places, 200 transitions, 4885 flow [2021-08-12 21:46:00,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 329 places, 198 transitions, 4881 flow [2021-08-12 21:46:00,299 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:00,299 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:00,299 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:00,299 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:00,299 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:00,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:00,299 INFO L82 PathProgramCache]: Analyzing trace with hash 217379, now seen corresponding path program 1 times [2021-08-12 21:46:00,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:00,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287594936] [2021-08-12 21:46:00,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:00,312 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:00,312 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:00,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:00,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287594936] [2021-08-12 21:46:00,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287594936] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:00,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:00,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:00,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756984438] [2021-08-12 21:46:00,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:00,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:00,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:00,316 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 200 [2021-08-12 21:46:00,316 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) [2021-08-12 21:46:00,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:00,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 200 [2021-08-12 21:46:00,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:00,375 INFO L129 PetriNetUnfolder]: 0/197 cut-off events. [2021-08-12 21:46:00,376 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:00,376 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. [2021-08-12 21:46:00,376 INFO L132 encePairwiseOnDemand]: 198/200 looper letters, 0 selfloop transitions, 1 changer transitions 0/197 dead transitions. [2021-08-12 21:46:00,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 197 transitions, 4881 flow [2021-08-12 21:46:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:00,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2021-08-12 21:46:00,377 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9883333333333333 [2021-08-12 21:46:00,377 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2021-08-12 21:46:00,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2021-08-12 21:46:00,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:00,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2021-08-12 21:46:00,378 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) [2021-08-12 21:46:00,379 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) [2021-08-12 21:46:00,379 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) [2021-08-12 21:46:00,379 INFO L348 CegarLoopForPetriNet]: 329 programPoint places, 1 predicate places. [2021-08-12 21:46:00,379 INFO L482 AbstractCegarLoop]: Abstraction has has 330 places, 197 transitions, 4881 flow [2021-08-12 21:46:00,379 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) [2021-08-12 21:46:00,379 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:00,380 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] [2021-08-12 21:46:00,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-08-12 21:46:00,380 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:00,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1308836489, now seen corresponding path program 1 times [2021-08-12 21:46:00,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:00,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252536881] [2021-08-12 21:46:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:00,393 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:00,396 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:00,405 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:00,406 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:00,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-08-12 21:46:00,406 WARN L235 ceAbstractionStarter]: 65 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:00,406 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 66 thread instances. [2021-08-12 21:46:00,463 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:00,463 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:00,464 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:00,464 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:00,464 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:00,464 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:00,464 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:00,464 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:00,464 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:00,464 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:00,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 336 places, 203 transitions, 5026 flow [2021-08-12 21:46:00,542 INFO L129 PetriNetUnfolder]: 0/401 cut-off events. [2021-08-12 21:46:00,542 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:00,542 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. [2021-08-12 21:46:00,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 203 transitions, 5026 flow [2021-08-12 21:46:00,544 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 334 places, 201 transitions, 5022 flow [2021-08-12 21:46:00,545 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:00,545 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:00,545 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:00,545 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:00,545 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:00,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:00,545 INFO L82 PathProgramCache]: Analyzing trace with hash 223875, now seen corresponding path program 1 times [2021-08-12 21:46:00,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:00,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701298376] [2021-08-12 21:46:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:00,559 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:00,559 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:00,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:00,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701298376] [2021-08-12 21:46:00,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701298376] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:00,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:00,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:00,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407356290] [2021-08-12 21:46:00,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:00,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:00,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:00,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:00,563 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 203 [2021-08-12 21:46:00,563 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) [2021-08-12 21:46:00,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:00,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 203 [2021-08-12 21:46:00,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:00,625 INFO L129 PetriNetUnfolder]: 0/200 cut-off events. [2021-08-12 21:46:00,625 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:00,625 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. [2021-08-12 21:46:00,626 INFO L132 encePairwiseOnDemand]: 201/203 looper letters, 0 selfloop transitions, 1 changer transitions 0/200 dead transitions. [2021-08-12 21:46:00,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 200 transitions, 5022 flow [2021-08-12 21:46:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2021-08-12 21:46:00,626 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9885057471264368 [2021-08-12 21:46:00,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2021-08-12 21:46:00,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2021-08-12 21:46:00,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:00,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2021-08-12 21:46:00,628 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) [2021-08-12 21:46:00,628 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) [2021-08-12 21:46:00,628 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) [2021-08-12 21:46:00,628 INFO L348 CegarLoopForPetriNet]: 334 programPoint places, 1 predicate places. [2021-08-12 21:46:00,628 INFO L482 AbstractCegarLoop]: Abstraction has has 335 places, 200 transitions, 5022 flow [2021-08-12 21:46:00,628 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) [2021-08-12 21:46:00,629 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:00,629 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] [2021-08-12 21:46:00,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-08-12 21:46:00,629 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2145466379, now seen corresponding path program 1 times [2021-08-12 21:46:00,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:00,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559694028] [2021-08-12 21:46:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:00,642 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:00,656 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:00,665 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:00,665 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:00,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-08-12 21:46:00,666 WARN L235 ceAbstractionStarter]: 66 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:00,666 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 67 thread instances. [2021-08-12 21:46:00,723 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:00,724 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:00,724 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:00,724 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:00,724 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:00,724 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:00,724 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:00,724 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:00,724 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:00,725 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:00,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 341 places, 206 transitions, 5169 flow [2021-08-12 21:46:00,802 INFO L129 PetriNetUnfolder]: 0/407 cut-off events. [2021-08-12 21:46:00,802 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:00,802 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. [2021-08-12 21:46:00,802 INFO L82 GeneralOperation]: Start removeDead. Operand has 341 places, 206 transitions, 5169 flow [2021-08-12 21:46:00,805 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 339 places, 204 transitions, 5165 flow [2021-08-12 21:46:00,805 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:00,805 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:00,805 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:00,806 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:00,806 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:00,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:00,806 INFO L82 PathProgramCache]: Analyzing trace with hash 230467, now seen corresponding path program 1 times [2021-08-12 21:46:00,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:00,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373798653] [2021-08-12 21:46:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:00,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:00,820 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:00,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:00,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373798653] [2021-08-12 21:46:00,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373798653] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:00,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:00,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:00,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101260433] [2021-08-12 21:46:00,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:00,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:00,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:00,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:00,823 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 206 [2021-08-12 21:46:00,823 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) [2021-08-12 21:46:00,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:00,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 206 [2021-08-12 21:46:00,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:00,887 INFO L129 PetriNetUnfolder]: 0/203 cut-off events. [2021-08-12 21:46:00,887 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:00,888 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. [2021-08-12 21:46:00,888 INFO L132 encePairwiseOnDemand]: 204/206 looper letters, 0 selfloop transitions, 1 changer transitions 0/203 dead transitions. [2021-08-12 21:46:00,888 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 203 transitions, 5165 flow [2021-08-12 21:46:00,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:00,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2021-08-12 21:46:00,889 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.988673139158576 [2021-08-12 21:46:00,889 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2021-08-12 21:46:00,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2021-08-12 21:46:00,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:00,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2021-08-12 21:46:00,890 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) [2021-08-12 21:46:00,891 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) [2021-08-12 21:46:00,891 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) [2021-08-12 21:46:00,891 INFO L348 CegarLoopForPetriNet]: 339 programPoint places, 1 predicate places. [2021-08-12 21:46:00,891 INFO L482 AbstractCegarLoop]: Abstraction has has 340 places, 203 transitions, 5165 flow [2021-08-12 21:46:00,891 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) [2021-08-12 21:46:00,891 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:00,891 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:46:00,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-08-12 21:46:00,892 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:00,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:00,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1114350847, now seen corresponding path program 1 times [2021-08-12 21:46:00,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:00,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478402155] [2021-08-12 21:46:00,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:00,906 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:00,908 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:00,917 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:00,917 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:00,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-08-12 21:46:00,917 WARN L235 ceAbstractionStarter]: 67 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:00,917 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 68 thread instances. [2021-08-12 21:46:01,037 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:01,038 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:01,038 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:01,038 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:01,038 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:01,038 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:01,038 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:01,038 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:01,038 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:01,038 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:01,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 346 places, 209 transitions, 5314 flow [2021-08-12 21:46:01,106 INFO L129 PetriNetUnfolder]: 0/413 cut-off events. [2021-08-12 21:46:01,106 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:01,106 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. [2021-08-12 21:46:01,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 209 transitions, 5314 flow [2021-08-12 21:46:01,108 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 344 places, 207 transitions, 5310 flow [2021-08-12 21:46:01,109 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:01,109 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:01,109 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:01,109 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:01,109 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:01,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:01,109 INFO L82 PathProgramCache]: Analyzing trace with hash 237155, now seen corresponding path program 1 times [2021-08-12 21:46:01,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:01,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567239104] [2021-08-12 21:46:01,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:01,126 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:01,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:01,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:01,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567239104] [2021-08-12 21:46:01,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567239104] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:01,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:01,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:01,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315369098] [2021-08-12 21:46:01,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:01,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:01,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:01,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:01,129 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 209 [2021-08-12 21:46:01,129 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) [2021-08-12 21:46:01,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:01,129 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 209 [2021-08-12 21:46:01,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:01,183 INFO L129 PetriNetUnfolder]: 0/206 cut-off events. [2021-08-12 21:46:01,184 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:01,184 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. [2021-08-12 21:46:01,184 INFO L132 encePairwiseOnDemand]: 207/209 looper letters, 0 selfloop transitions, 1 changer transitions 0/206 dead transitions. [2021-08-12 21:46:01,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 206 transitions, 5310 flow [2021-08-12 21:46:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2021-08-12 21:46:01,185 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.988835725677831 [2021-08-12 21:46:01,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2021-08-12 21:46:01,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2021-08-12 21:46:01,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:01,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2021-08-12 21:46:01,186 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) [2021-08-12 21:46:01,186 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) [2021-08-12 21:46:01,187 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) [2021-08-12 21:46:01,187 INFO L348 CegarLoopForPetriNet]: 344 programPoint places, 1 predicate places. [2021-08-12 21:46:01,187 INFO L482 AbstractCegarLoop]: Abstraction has has 345 places, 206 transitions, 5310 flow [2021-08-12 21:46:01,187 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) [2021-08-12 21:46:01,187 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:01,187 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] [2021-08-12 21:46:01,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-08-12 21:46:01,187 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:01,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:01,187 INFO L82 PathProgramCache]: Analyzing trace with hash 660683726, now seen corresponding path program 1 times [2021-08-12 21:46:01,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:01,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983666677] [2021-08-12 21:46:01,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:01,203 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:01,205 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:01,217 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:01,217 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:01,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-08-12 21:46:01,218 WARN L235 ceAbstractionStarter]: 68 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:01,218 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 69 thread instances. [2021-08-12 21:46:01,282 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:01,282 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:01,283 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:01,283 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:01,283 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:01,283 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:01,283 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:01,283 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:01,283 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:01,283 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:01,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 351 places, 212 transitions, 5461 flow [2021-08-12 21:46:01,354 INFO L129 PetriNetUnfolder]: 0/419 cut-off events. [2021-08-12 21:46:01,354 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:01,354 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. [2021-08-12 21:46:01,354 INFO L82 GeneralOperation]: Start removeDead. Operand has 351 places, 212 transitions, 5461 flow [2021-08-12 21:46:01,357 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 349 places, 210 transitions, 5457 flow [2021-08-12 21:46:01,357 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:01,357 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:01,357 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:01,357 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:01,357 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:01,358 INFO L82 PathProgramCache]: Analyzing trace with hash 243939, now seen corresponding path program 1 times [2021-08-12 21:46:01,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:01,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371583752] [2021-08-12 21:46:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:01,374 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:01,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:01,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:01,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371583752] [2021-08-12 21:46:01,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371583752] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:01,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:01,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:01,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631783036] [2021-08-12 21:46:01,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:01,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:01,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:01,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:01,377 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 212 [2021-08-12 21:46:01,377 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) [2021-08-12 21:46:01,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:01,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 212 [2021-08-12 21:46:01,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:01,433 INFO L129 PetriNetUnfolder]: 0/209 cut-off events. [2021-08-12 21:46:01,433 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:01,433 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. [2021-08-12 21:46:01,434 INFO L132 encePairwiseOnDemand]: 210/212 looper letters, 0 selfloop transitions, 1 changer transitions 0/209 dead transitions. [2021-08-12 21:46:01,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 209 transitions, 5457 flow [2021-08-12 21:46:01,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2021-08-12 21:46:01,434 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9889937106918238 [2021-08-12 21:46:01,434 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2021-08-12 21:46:01,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2021-08-12 21:46:01,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:01,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2021-08-12 21:46:01,435 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) [2021-08-12 21:46:01,436 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) [2021-08-12 21:46:01,436 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) [2021-08-12 21:46:01,436 INFO L348 CegarLoopForPetriNet]: 349 programPoint places, 1 predicate places. [2021-08-12 21:46:01,436 INFO L482 AbstractCegarLoop]: Abstraction has has 350 places, 209 transitions, 5457 flow [2021-08-12 21:46:01,436 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) [2021-08-12 21:46:01,436 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:01,436 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:46:01,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-08-12 21:46:01,436 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:01,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:01,437 INFO L82 PathProgramCache]: Analyzing trace with hash -754160187, now seen corresponding path program 1 times [2021-08-12 21:46:01,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:01,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147119789] [2021-08-12 21:46:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:01,452 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:01,454 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:01,462 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:01,462 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:01,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-08-12 21:46:01,462 WARN L235 ceAbstractionStarter]: 69 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:01,462 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 70 thread instances. [2021-08-12 21:46:01,516 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:01,516 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:01,517 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:01,517 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:01,517 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:01,517 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:01,517 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:01,517 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:01,517 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:01,517 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:01,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 356 places, 215 transitions, 5610 flow [2021-08-12 21:46:01,590 INFO L129 PetriNetUnfolder]: 0/425 cut-off events. [2021-08-12 21:46:01,590 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:01,590 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. [2021-08-12 21:46:01,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 356 places, 215 transitions, 5610 flow [2021-08-12 21:46:01,593 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 354 places, 213 transitions, 5606 flow [2021-08-12 21:46:01,593 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:01,593 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:01,594 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:01,594 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:01,594 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:01,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:01,594 INFO L82 PathProgramCache]: Analyzing trace with hash 250819, now seen corresponding path program 1 times [2021-08-12 21:46:01,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:01,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461472531] [2021-08-12 21:46:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:01,612 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:01,617 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:01,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:01,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461472531] [2021-08-12 21:46:01,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461472531] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:01,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:01,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:01,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141815624] [2021-08-12 21:46:01,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:01,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:01,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:01,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:01,620 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 215 [2021-08-12 21:46:01,620 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) [2021-08-12 21:46:01,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:01,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 215 [2021-08-12 21:46:01,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:01,681 INFO L129 PetriNetUnfolder]: 0/212 cut-off events. [2021-08-12 21:46:01,681 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:01,681 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. [2021-08-12 21:46:01,682 INFO L132 encePairwiseOnDemand]: 213/215 looper letters, 0 selfloop transitions, 1 changer transitions 0/212 dead transitions. [2021-08-12 21:46:01,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 212 transitions, 5606 flow [2021-08-12 21:46:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:01,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 638 transitions. [2021-08-12 21:46:01,683 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9891472868217054 [2021-08-12 21:46:01,683 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 638 transitions. [2021-08-12 21:46:01,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 638 transitions. [2021-08-12 21:46:01,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:01,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 638 transitions. [2021-08-12 21:46:01,683 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) [2021-08-12 21:46:01,684 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) [2021-08-12 21:46:01,684 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) [2021-08-12 21:46:01,684 INFO L348 CegarLoopForPetriNet]: 354 programPoint places, 1 predicate places. [2021-08-12 21:46:01,684 INFO L482 AbstractCegarLoop]: Abstraction has has 355 places, 212 transitions, 5606 flow [2021-08-12 21:46:01,684 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) [2021-08-12 21:46:01,684 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:01,684 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] [2021-08-12 21:46:01,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-08-12 21:46:01,685 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:01,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:01,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1018517423, now seen corresponding path program 1 times [2021-08-12 21:46:01,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:01,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488165115] [2021-08-12 21:46:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:01,702 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:01,704 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:01,714 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:01,714 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:01,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-08-12 21:46:01,714 WARN L235 ceAbstractionStarter]: 70 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:01,714 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 71 thread instances. [2021-08-12 21:46:01,769 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:01,770 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:01,770 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:01,770 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:01,770 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:01,770 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:01,770 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:01,770 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:01,770 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:01,770 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:01,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 361 places, 218 transitions, 5761 flow [2021-08-12 21:46:01,848 INFO L129 PetriNetUnfolder]: 0/431 cut-off events. [2021-08-12 21:46:01,848 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:01,848 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. [2021-08-12 21:46:01,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 361 places, 218 transitions, 5761 flow [2021-08-12 21:46:01,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 359 places, 216 transitions, 5757 flow [2021-08-12 21:46:01,851 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:01,851 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:01,851 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:01,851 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:01,851 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:01,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:01,851 INFO L82 PathProgramCache]: Analyzing trace with hash 257795, now seen corresponding path program 1 times [2021-08-12 21:46:01,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:01,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614825058] [2021-08-12 21:46:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:01,868 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:01,868 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:01,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:01,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614825058] [2021-08-12 21:46:01,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614825058] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:01,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:01,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:01,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31436847] [2021-08-12 21:46:01,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:01,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:01,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:01,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:01,871 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 218 [2021-08-12 21:46:01,872 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) [2021-08-12 21:46:01,872 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:01,872 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 218 [2021-08-12 21:46:01,872 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:01,932 INFO L129 PetriNetUnfolder]: 0/215 cut-off events. [2021-08-12 21:46:01,933 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:01,933 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. [2021-08-12 21:46:01,933 INFO L132 encePairwiseOnDemand]: 216/218 looper letters, 0 selfloop transitions, 1 changer transitions 0/215 dead transitions. [2021-08-12 21:46:01,933 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 215 transitions, 5757 flow [2021-08-12 21:46:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:01,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2021-08-12 21:46:01,934 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9892966360856269 [2021-08-12 21:46:01,934 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2021-08-12 21:46:01,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2021-08-12 21:46:01,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:01,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2021-08-12 21:46:01,935 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) [2021-08-12 21:46:01,936 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) [2021-08-12 21:46:01,936 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) [2021-08-12 21:46:01,936 INFO L348 CegarLoopForPetriNet]: 359 programPoint places, 1 predicate places. [2021-08-12 21:46:01,936 INFO L482 AbstractCegarLoop]: Abstraction has has 360 places, 215 transitions, 5757 flow [2021-08-12 21:46:01,936 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) [2021-08-12 21:46:01,936 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:01,936 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] [2021-08-12 21:46:01,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-08-12 21:46:01,936 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:01,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:01,936 INFO L82 PathProgramCache]: Analyzing trace with hash -640033195, now seen corresponding path program 1 times [2021-08-12 21:46:01,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:01,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452204654] [2021-08-12 21:46:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:01,953 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:01,955 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:01,965 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:01,965 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:01,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-08-12 21:46:01,965 WARN L235 ceAbstractionStarter]: 71 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:01,966 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 72 thread instances. [2021-08-12 21:46:02,022 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:02,022 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:02,023 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:02,023 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:02,023 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:02,023 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:02,023 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:02,023 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:02,023 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:02,023 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:02,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 366 places, 221 transitions, 5914 flow [2021-08-12 21:46:02,167 INFO L129 PetriNetUnfolder]: 0/437 cut-off events. [2021-08-12 21:46:02,167 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:02,167 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. [2021-08-12 21:46:02,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 366 places, 221 transitions, 5914 flow [2021-08-12 21:46:02,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 364 places, 219 transitions, 5910 flow [2021-08-12 21:46:02,170 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:02,171 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:02,171 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:02,171 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:02,171 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:02,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:02,171 INFO L82 PathProgramCache]: Analyzing trace with hash 264867, now seen corresponding path program 1 times [2021-08-12 21:46:02,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:02,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710042743] [2021-08-12 21:46:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:02,188 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:02,188 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:02,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:02,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710042743] [2021-08-12 21:46:02,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710042743] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:02,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:02,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:02,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813839077] [2021-08-12 21:46:02,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:02,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:02,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:02,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:02,192 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 221 [2021-08-12 21:46:02,192 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) [2021-08-12 21:46:02,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:02,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 221 [2021-08-12 21:46:02,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:02,259 INFO L129 PetriNetUnfolder]: 0/218 cut-off events. [2021-08-12 21:46:02,260 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:02,260 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. [2021-08-12 21:46:02,260 INFO L132 encePairwiseOnDemand]: 219/221 looper letters, 0 selfloop transitions, 1 changer transitions 0/218 dead transitions. [2021-08-12 21:46:02,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 218 transitions, 5910 flow [2021-08-12 21:46:02,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:02,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:02,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 656 transitions. [2021-08-12 21:46:02,261 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9894419306184012 [2021-08-12 21:46:02,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 656 transitions. [2021-08-12 21:46:02,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 656 transitions. [2021-08-12 21:46:02,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:02,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 656 transitions. [2021-08-12 21:46:02,262 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) [2021-08-12 21:46:02,262 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) [2021-08-12 21:46:02,263 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) [2021-08-12 21:46:02,263 INFO L348 CegarLoopForPetriNet]: 364 programPoint places, 1 predicate places. [2021-08-12 21:46:02,263 INFO L482 AbstractCegarLoop]: Abstraction has has 365 places, 218 transitions, 5910 flow [2021-08-12 21:46:02,263 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) [2021-08-12 21:46:02,263 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:02,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:46:02,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-08-12 21:46:02,263 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:02,263 INFO L82 PathProgramCache]: Analyzing trace with hash -968754668, now seen corresponding path program 1 times [2021-08-12 21:46:02,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:02,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389150987] [2021-08-12 21:46:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:02,280 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:02,282 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:02,292 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:02,292 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:02,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-08-12 21:46:02,292 WARN L235 ceAbstractionStarter]: 72 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:02,292 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 73 thread instances. [2021-08-12 21:46:02,348 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:02,348 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:02,349 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:02,349 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:02,349 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:02,349 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:02,349 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:02,349 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:02,349 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:02,349 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:02,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 371 places, 224 transitions, 6069 flow [2021-08-12 21:46:02,444 INFO L129 PetriNetUnfolder]: 0/443 cut-off events. [2021-08-12 21:46:02,444 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:02,444 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. [2021-08-12 21:46:02,444 INFO L82 GeneralOperation]: Start removeDead. Operand has 371 places, 224 transitions, 6069 flow [2021-08-12 21:46:02,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 369 places, 222 transitions, 6065 flow [2021-08-12 21:46:02,447 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:02,448 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:02,448 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:02,448 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:02,448 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:02,448 INFO L82 PathProgramCache]: Analyzing trace with hash 272035, now seen corresponding path program 1 times [2021-08-12 21:46:02,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:02,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781261710] [2021-08-12 21:46:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:02,465 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:02,466 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:02,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:02,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781261710] [2021-08-12 21:46:02,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781261710] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:02,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:02,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:02,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597595744] [2021-08-12 21:46:02,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:02,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:02,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:02,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:02,469 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 224 [2021-08-12 21:46:02,469 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) [2021-08-12 21:46:02,469 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:02,469 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 224 [2021-08-12 21:46:02,469 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:02,539 INFO L129 PetriNetUnfolder]: 0/221 cut-off events. [2021-08-12 21:46:02,540 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:02,540 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. [2021-08-12 21:46:02,540 INFO L132 encePairwiseOnDemand]: 222/224 looper letters, 0 selfloop transitions, 1 changer transitions 0/221 dead transitions. [2021-08-12 21:46:02,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 221 transitions, 6065 flow [2021-08-12 21:46:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:02,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 665 transitions. [2021-08-12 21:46:02,541 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9895833333333334 [2021-08-12 21:46:02,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 665 transitions. [2021-08-12 21:46:02,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 665 transitions. [2021-08-12 21:46:02,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:02,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 665 transitions. [2021-08-12 21:46:02,542 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) [2021-08-12 21:46:02,544 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) [2021-08-12 21:46:02,544 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) [2021-08-12 21:46:02,544 INFO L348 CegarLoopForPetriNet]: 369 programPoint places, 1 predicate places. [2021-08-12 21:46:02,544 INFO L482 AbstractCegarLoop]: Abstraction has has 370 places, 221 transitions, 6065 flow [2021-08-12 21:46:02,544 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) [2021-08-12 21:46:02,544 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:02,544 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, 1, 1, 1, 1] [2021-08-12 21:46:02,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-08-12 21:46:02,544 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:02,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:02,545 INFO L82 PathProgramCache]: Analyzing trace with hash -219590607, now seen corresponding path program 1 times [2021-08-12 21:46:02,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:02,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051312134] [2021-08-12 21:46:02,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:02,562 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:02,564 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:02,574 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:02,574 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:02,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-08-12 21:46:02,574 WARN L235 ceAbstractionStarter]: 73 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:02,574 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 74 thread instances. [2021-08-12 21:46:02,633 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:02,634 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:02,634 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:02,634 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:02,634 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:02,634 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:02,634 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:02,634 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:02,634 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:02,634 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:02,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 376 places, 227 transitions, 6226 flow [2021-08-12 21:46:02,728 INFO L129 PetriNetUnfolder]: 0/449 cut-off events. [2021-08-12 21:46:02,729 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:02,729 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. [2021-08-12 21:46:02,729 INFO L82 GeneralOperation]: Start removeDead. Operand has 376 places, 227 transitions, 6226 flow [2021-08-12 21:46:02,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 374 places, 225 transitions, 6222 flow [2021-08-12 21:46:02,732 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:02,732 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:02,732 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:02,732 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:02,732 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:02,733 INFO L82 PathProgramCache]: Analyzing trace with hash 279299, now seen corresponding path program 1 times [2021-08-12 21:46:02,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:02,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699567340] [2021-08-12 21:46:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:02,750 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:02,751 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:02,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:02,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699567340] [2021-08-12 21:46:02,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699567340] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:02,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:02,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:02,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854520018] [2021-08-12 21:46:02,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:02,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:02,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:02,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:02,754 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 227 [2021-08-12 21:46:02,754 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) [2021-08-12 21:46:02,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:02,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 227 [2021-08-12 21:46:02,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:02,831 INFO L129 PetriNetUnfolder]: 0/224 cut-off events. [2021-08-12 21:46:02,831 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:02,832 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. [2021-08-12 21:46:02,832 INFO L132 encePairwiseOnDemand]: 225/227 looper letters, 0 selfloop transitions, 1 changer transitions 0/224 dead transitions. [2021-08-12 21:46:02,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 224 transitions, 6222 flow [2021-08-12 21:46:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:02,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 674 transitions. [2021-08-12 21:46:02,833 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9897209985315712 [2021-08-12 21:46:02,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 674 transitions. [2021-08-12 21:46:02,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 674 transitions. [2021-08-12 21:46:02,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:02,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 674 transitions. [2021-08-12 21:46:02,834 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) [2021-08-12 21:46:02,835 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) [2021-08-12 21:46:02,835 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) [2021-08-12 21:46:02,835 INFO L348 CegarLoopForPetriNet]: 374 programPoint places, 1 predicate places. [2021-08-12 21:46:02,835 INFO L482 AbstractCegarLoop]: Abstraction has has 375 places, 224 transitions, 6222 flow [2021-08-12 21:46:02,835 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) [2021-08-12 21:46:02,835 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:02,835 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] [2021-08-12 21:46:02,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-08-12 21:46:02,836 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:02,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:02,836 INFO L82 PathProgramCache]: Analyzing trace with hash 384134551, now seen corresponding path program 1 times [2021-08-12 21:46:02,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:02,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823383507] [2021-08-12 21:46:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:02,855 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:02,857 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:02,868 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:02,868 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:02,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-08-12 21:46:02,868 WARN L235 ceAbstractionStarter]: 74 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:02,868 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 75 thread instances. [2021-08-12 21:46:02,926 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:02,927 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:02,927 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:02,927 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:02,927 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:02,927 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:02,927 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:02,927 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:02,927 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:02,927 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:02,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 381 places, 230 transitions, 6385 flow [2021-08-12 21:46:03,026 INFO L129 PetriNetUnfolder]: 0/455 cut-off events. [2021-08-12 21:46:03,026 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:03,026 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. [2021-08-12 21:46:03,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 381 places, 230 transitions, 6385 flow [2021-08-12 21:46:03,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 379 places, 228 transitions, 6381 flow [2021-08-12 21:46:03,029 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:03,030 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:03,030 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:03,030 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:03,030 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:03,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:03,030 INFO L82 PathProgramCache]: Analyzing trace with hash 286659, now seen corresponding path program 1 times [2021-08-12 21:46:03,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:03,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662944813] [2021-08-12 21:46:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:03,048 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:03,048 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:03,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:03,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662944813] [2021-08-12 21:46:03,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662944813] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:03,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:03,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:03,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919486949] [2021-08-12 21:46:03,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:03,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:03,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:03,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:03,051 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 230 [2021-08-12 21:46:03,051 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) [2021-08-12 21:46:03,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:03,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 230 [2021-08-12 21:46:03,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:03,150 INFO L129 PetriNetUnfolder]: 0/227 cut-off events. [2021-08-12 21:46:03,150 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:03,150 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. [2021-08-12 21:46:03,151 INFO L132 encePairwiseOnDemand]: 228/230 looper letters, 0 selfloop transitions, 1 changer transitions 0/227 dead transitions. [2021-08-12 21:46:03,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 227 transitions, 6381 flow [2021-08-12 21:46:03,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:03,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:03,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2021-08-12 21:46:03,152 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9898550724637681 [2021-08-12 21:46:03,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2021-08-12 21:46:03,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2021-08-12 21:46:03,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:03,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2021-08-12 21:46:03,153 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) [2021-08-12 21:46:03,153 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) [2021-08-12 21:46:03,153 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) [2021-08-12 21:46:03,153 INFO L348 CegarLoopForPetriNet]: 379 programPoint places, 1 predicate places. [2021-08-12 21:46:03,153 INFO L482 AbstractCegarLoop]: Abstraction has has 380 places, 227 transitions, 6381 flow [2021-08-12 21:46:03,154 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) [2021-08-12 21:46:03,154 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:03,154 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] [2021-08-12 21:46:03,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2021-08-12 21:46:03,154 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:03,154 INFO L82 PathProgramCache]: Analyzing trace with hash 808822489, now seen corresponding path program 1 times [2021-08-12 21:46:03,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:03,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920226634] [2021-08-12 21:46:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:03,173 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:03,175 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:03,188 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:03,188 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:03,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-08-12 21:46:03,189 WARN L235 ceAbstractionStarter]: 75 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:03,189 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 76 thread instances. [2021-08-12 21:46:03,248 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:03,249 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:03,249 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:03,249 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:03,249 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:03,249 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:03,249 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:03,249 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:03,249 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:03,249 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:03,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 386 places, 233 transitions, 6546 flow [2021-08-12 21:46:03,410 INFO L129 PetriNetUnfolder]: 0/461 cut-off events. [2021-08-12 21:46:03,411 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:03,411 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. [2021-08-12 21:46:03,411 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 233 transitions, 6546 flow [2021-08-12 21:46:03,414 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 384 places, 231 transitions, 6542 flow [2021-08-12 21:46:03,415 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:03,415 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:03,415 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:03,415 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:03,415 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:03,416 INFO L82 PathProgramCache]: Analyzing trace with hash 294115, now seen corresponding path program 1 times [2021-08-12 21:46:03,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:03,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746019847] [2021-08-12 21:46:03,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:03,436 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:03,436 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:03,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:03,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746019847] [2021-08-12 21:46:03,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746019847] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:03,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:03,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:03,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145608071] [2021-08-12 21:46:03,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:03,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:03,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:03,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:03,440 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 233 [2021-08-12 21:46:03,441 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) [2021-08-12 21:46:03,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:03,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 233 [2021-08-12 21:46:03,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:03,519 INFO L129 PetriNetUnfolder]: 0/230 cut-off events. [2021-08-12 21:46:03,519 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:03,520 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. [2021-08-12 21:46:03,520 INFO L132 encePairwiseOnDemand]: 231/233 looper letters, 0 selfloop transitions, 1 changer transitions 0/230 dead transitions. [2021-08-12 21:46:03,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 230 transitions, 6542 flow [2021-08-12 21:46:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:03,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2021-08-12 21:46:03,521 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9899856938483548 [2021-08-12 21:46:03,521 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2021-08-12 21:46:03,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2021-08-12 21:46:03,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:03,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2021-08-12 21:46:03,522 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) [2021-08-12 21:46:03,522 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) [2021-08-12 21:46:03,523 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) [2021-08-12 21:46:03,523 INFO L348 CegarLoopForPetriNet]: 384 programPoint places, 1 predicate places. [2021-08-12 21:46:03,523 INFO L482 AbstractCegarLoop]: Abstraction has has 385 places, 230 transitions, 6542 flow [2021-08-12 21:46:03,523 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) [2021-08-12 21:46:03,523 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:03,523 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] [2021-08-12 21:46:03,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-08-12 21:46:03,523 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:03,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:03,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2026045606, now seen corresponding path program 1 times [2021-08-12 21:46:03,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:03,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108993601] [2021-08-12 21:46:03,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:03,539 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:03,541 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:03,552 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:03,552 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:03,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-08-12 21:46:03,553 WARN L235 ceAbstractionStarter]: 76 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:03,553 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 77 thread instances. [2021-08-12 21:46:03,612 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:03,613 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:03,613 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:03,613 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:03,613 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:03,613 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:03,613 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:03,613 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:03,613 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:03,613 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:03,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 391 places, 236 transitions, 6709 flow [2021-08-12 21:46:03,706 INFO L129 PetriNetUnfolder]: 0/467 cut-off events. [2021-08-12 21:46:03,706 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:03,706 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. [2021-08-12 21:46:03,706 INFO L82 GeneralOperation]: Start removeDead. Operand has 391 places, 236 transitions, 6709 flow [2021-08-12 21:46:03,709 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 389 places, 234 transitions, 6705 flow [2021-08-12 21:46:03,709 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:03,709 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:03,709 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:03,709 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:03,710 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:03,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:03,710 INFO L82 PathProgramCache]: Analyzing trace with hash 301667, now seen corresponding path program 1 times [2021-08-12 21:46:03,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:03,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484050343] [2021-08-12 21:46:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:03,730 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:03,731 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:03,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:03,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484050343] [2021-08-12 21:46:03,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484050343] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:03,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:03,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:03,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497368104] [2021-08-12 21:46:03,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:03,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:03,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:03,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:03,734 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 236 [2021-08-12 21:46:03,735 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) [2021-08-12 21:46:03,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:03,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 236 [2021-08-12 21:46:03,735 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:03,805 INFO L129 PetriNetUnfolder]: 0/233 cut-off events. [2021-08-12 21:46:03,805 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:03,805 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. [2021-08-12 21:46:03,806 INFO L132 encePairwiseOnDemand]: 234/236 looper letters, 0 selfloop transitions, 1 changer transitions 0/233 dead transitions. [2021-08-12 21:46:03,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 233 transitions, 6705 flow [2021-08-12 21:46:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:03,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 701 transitions. [2021-08-12 21:46:03,806 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9901129943502824 [2021-08-12 21:46:03,806 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 701 transitions. [2021-08-12 21:46:03,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 701 transitions. [2021-08-12 21:46:03,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:03,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 701 transitions. [2021-08-12 21:46:03,807 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) [2021-08-12 21:46:03,808 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) [2021-08-12 21:46:03,808 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) [2021-08-12 21:46:03,808 INFO L348 CegarLoopForPetriNet]: 389 programPoint places, 1 predicate places. [2021-08-12 21:46:03,808 INFO L482 AbstractCegarLoop]: Abstraction has has 390 places, 233 transitions, 6705 flow [2021-08-12 21:46:03,808 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) [2021-08-12 21:46:03,808 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:03,809 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:46:03,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-08-12 21:46:03,809 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:03,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1437071923, now seen corresponding path program 1 times [2021-08-12 21:46:03,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:03,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219754352] [2021-08-12 21:46:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:03,827 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:03,831 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:03,843 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:03,843 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:03,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-08-12 21:46:03,843 WARN L235 ceAbstractionStarter]: 77 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:03,843 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 78 thread instances. [2021-08-12 21:46:03,907 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:03,907 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:03,908 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:03,908 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:03,908 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:03,908 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:03,908 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:03,908 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:03,908 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:03,908 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:03,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 396 places, 239 transitions, 6874 flow [2021-08-12 21:46:03,998 INFO L129 PetriNetUnfolder]: 0/473 cut-off events. [2021-08-12 21:46:03,998 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:03,998 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. [2021-08-12 21:46:03,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 396 places, 239 transitions, 6874 flow [2021-08-12 21:46:04,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 394 places, 237 transitions, 6870 flow [2021-08-12 21:46:04,002 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:04,002 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:04,002 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:04,002 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:04,002 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash 309315, now seen corresponding path program 1 times [2021-08-12 21:46:04,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:04,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674260641] [2021-08-12 21:46:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:04,020 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:04,020 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:04,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:04,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674260641] [2021-08-12 21:46:04,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674260641] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:04,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:04,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:04,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203751821] [2021-08-12 21:46:04,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:04,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:04,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:04,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:04,024 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 239 [2021-08-12 21:46:04,024 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) [2021-08-12 21:46:04,024 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:04,024 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 239 [2021-08-12 21:46:04,024 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:04,097 INFO L129 PetriNetUnfolder]: 0/236 cut-off events. [2021-08-12 21:46:04,097 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:04,097 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. [2021-08-12 21:46:04,098 INFO L132 encePairwiseOnDemand]: 237/239 looper letters, 0 selfloop transitions, 1 changer transitions 0/236 dead transitions. [2021-08-12 21:46:04,098 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 236 transitions, 6870 flow [2021-08-12 21:46:04,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:04,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2021-08-12 21:46:04,099 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9902370990237099 [2021-08-12 21:46:04,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2021-08-12 21:46:04,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2021-08-12 21:46:04,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:04,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2021-08-12 21:46:04,100 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) [2021-08-12 21:46:04,100 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) [2021-08-12 21:46:04,100 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) [2021-08-12 21:46:04,100 INFO L348 CegarLoopForPetriNet]: 394 programPoint places, 1 predicate places. [2021-08-12 21:46:04,100 INFO L482 AbstractCegarLoop]: Abstraction has has 395 places, 236 transitions, 6870 flow [2021-08-12 21:46:04,101 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) [2021-08-12 21:46:04,101 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:04,101 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] [2021-08-12 21:46:04,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-08-12 21:46:04,101 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:04,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:04,101 INFO L82 PathProgramCache]: Analyzing trace with hash 304770013, now seen corresponding path program 1 times [2021-08-12 21:46:04,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:04,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044766488] [2021-08-12 21:46:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:04,120 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:04,122 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:04,133 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:04,133 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:04,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-08-12 21:46:04,133 WARN L235 ceAbstractionStarter]: 78 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:04,133 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 79 thread instances. [2021-08-12 21:46:04,195 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:04,195 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:04,196 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:04,196 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:04,196 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:04,196 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:04,196 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:04,196 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:04,196 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:04,196 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:04,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 401 places, 242 transitions, 7041 flow [2021-08-12 21:46:04,291 INFO L129 PetriNetUnfolder]: 0/479 cut-off events. [2021-08-12 21:46:04,291 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:04,291 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. [2021-08-12 21:46:04,291 INFO L82 GeneralOperation]: Start removeDead. Operand has 401 places, 242 transitions, 7041 flow [2021-08-12 21:46:04,294 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 399 places, 240 transitions, 7037 flow [2021-08-12 21:46:04,294 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:04,294 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:04,295 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:04,295 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:04,295 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:04,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:04,295 INFO L82 PathProgramCache]: Analyzing trace with hash 317059, now seen corresponding path program 1 times [2021-08-12 21:46:04,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:04,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154824446] [2021-08-12 21:46:04,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:04,314 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:04,314 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:04,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:04,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154824446] [2021-08-12 21:46:04,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154824446] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:04,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:04,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:04,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807504390] [2021-08-12 21:46:04,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:04,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:04,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:04,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:04,318 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 242 [2021-08-12 21:46:04,318 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) [2021-08-12 21:46:04,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:04,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 242 [2021-08-12 21:46:04,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:04,517 INFO L129 PetriNetUnfolder]: 0/239 cut-off events. [2021-08-12 21:46:04,518 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:04,518 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. [2021-08-12 21:46:04,519 INFO L132 encePairwiseOnDemand]: 240/242 looper letters, 0 selfloop transitions, 1 changer transitions 0/239 dead transitions. [2021-08-12 21:46:04,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 239 transitions, 7037 flow [2021-08-12 21:46:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:04,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2021-08-12 21:46:04,520 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.990358126721763 [2021-08-12 21:46:04,520 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2021-08-12 21:46:04,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2021-08-12 21:46:04,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:04,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2021-08-12 21:46:04,521 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) [2021-08-12 21:46:04,522 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) [2021-08-12 21:46:04,522 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) [2021-08-12 21:46:04,522 INFO L348 CegarLoopForPetriNet]: 399 programPoint places, 1 predicate places. [2021-08-12 21:46:04,522 INFO L482 AbstractCegarLoop]: Abstraction has has 400 places, 239 transitions, 7037 flow [2021-08-12 21:46:04,523 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) [2021-08-12 21:46:04,523 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:04,523 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] [2021-08-12 21:46:04,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-08-12 21:46:04,523 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:04,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:04,523 INFO L82 PathProgramCache]: Analyzing trace with hash 269996173, now seen corresponding path program 1 times [2021-08-12 21:46:04,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:04,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167825434] [2021-08-12 21:46:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:04,546 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:04,548 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:04,562 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:04,563 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:04,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-08-12 21:46:04,563 WARN L235 ceAbstractionStarter]: 79 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:04,563 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 80 thread instances. [2021-08-12 21:46:04,631 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:04,631 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:04,631 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:04,631 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:04,631 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:04,631 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:04,632 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:04,632 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:04,632 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:04,632 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:04,634 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 406 places, 245 transitions, 7210 flow [2021-08-12 21:46:04,746 INFO L129 PetriNetUnfolder]: 0/485 cut-off events. [2021-08-12 21:46:04,746 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:04,747 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. [2021-08-12 21:46:04,747 INFO L82 GeneralOperation]: Start removeDead. Operand has 406 places, 245 transitions, 7210 flow [2021-08-12 21:46:04,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 404 places, 243 transitions, 7206 flow [2021-08-12 21:46:04,751 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:04,751 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:04,751 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:04,751 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:04,751 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:04,751 INFO L82 PathProgramCache]: Analyzing trace with hash 324899, now seen corresponding path program 1 times [2021-08-12 21:46:04,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:04,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092952268] [2021-08-12 21:46:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:04,772 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:04,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:04,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:04,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092952268] [2021-08-12 21:46:04,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092952268] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:04,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:04,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:04,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778437527] [2021-08-12 21:46:04,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:04,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:04,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:04,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:04,777 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 245 [2021-08-12 21:46:04,777 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) [2021-08-12 21:46:04,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:04,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 245 [2021-08-12 21:46:04,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:04,870 INFO L129 PetriNetUnfolder]: 0/242 cut-off events. [2021-08-12 21:46:04,870 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:04,870 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. [2021-08-12 21:46:04,871 INFO L132 encePairwiseOnDemand]: 243/245 looper letters, 0 selfloop transitions, 1 changer transitions 0/242 dead transitions. [2021-08-12 21:46:04,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 242 transitions, 7206 flow [2021-08-12 21:46:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 728 transitions. [2021-08-12 21:46:04,872 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9904761904761905 [2021-08-12 21:46:04,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 728 transitions. [2021-08-12 21:46:04,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 728 transitions. [2021-08-12 21:46:04,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:04,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 728 transitions. [2021-08-12 21:46:04,873 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) [2021-08-12 21:46:04,874 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) [2021-08-12 21:46:04,874 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) [2021-08-12 21:46:04,874 INFO L348 CegarLoopForPetriNet]: 404 programPoint places, 1 predicate places. [2021-08-12 21:46:04,874 INFO L482 AbstractCegarLoop]: Abstraction has has 405 places, 242 transitions, 7206 flow [2021-08-12 21:46:04,874 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) [2021-08-12 21:46:04,874 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:04,874 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] [2021-08-12 21:46:04,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-08-12 21:46:04,875 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:04,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:04,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1591291808, now seen corresponding path program 1 times [2021-08-12 21:46:04,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:04,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786407280] [2021-08-12 21:46:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:04,896 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:04,898 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:04,911 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:04,911 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:04,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-08-12 21:46:04,911 WARN L235 ceAbstractionStarter]: 80 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:04,911 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 81 thread instances. [2021-08-12 21:46:04,980 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:04,981 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:04,981 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:04,981 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:04,981 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:04,981 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:04,981 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:04,981 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:04,981 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:04,981 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:04,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 411 places, 248 transitions, 7381 flow [2021-08-12 21:46:05,103 INFO L129 PetriNetUnfolder]: 0/491 cut-off events. [2021-08-12 21:46:05,103 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:05,104 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. [2021-08-12 21:46:05,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 411 places, 248 transitions, 7381 flow [2021-08-12 21:46:05,107 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 409 places, 246 transitions, 7377 flow [2021-08-12 21:46:05,107 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:05,107 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:05,107 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:05,107 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:05,107 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:05,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:05,107 INFO L82 PathProgramCache]: Analyzing trace with hash 332835, now seen corresponding path program 1 times [2021-08-12 21:46:05,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:05,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203746995] [2021-08-12 21:46:05,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:05,131 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:05,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:05,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:05,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203746995] [2021-08-12 21:46:05,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203746995] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:05,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:05,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:05,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548737623] [2021-08-12 21:46:05,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:05,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:05,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:05,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:05,136 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 248 [2021-08-12 21:46:05,136 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) [2021-08-12 21:46:05,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:05,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 248 [2021-08-12 21:46:05,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:05,232 INFO L129 PetriNetUnfolder]: 0/245 cut-off events. [2021-08-12 21:46:05,232 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:05,233 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. [2021-08-12 21:46:05,233 INFO L132 encePairwiseOnDemand]: 246/248 looper letters, 0 selfloop transitions, 1 changer transitions 0/245 dead transitions. [2021-08-12 21:46:05,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 245 transitions, 7377 flow [2021-08-12 21:46:05,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:05,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:05,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 737 transitions. [2021-08-12 21:46:05,234 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9905913978494624 [2021-08-12 21:46:05,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 737 transitions. [2021-08-12 21:46:05,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 737 transitions. [2021-08-12 21:46:05,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:05,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 737 transitions. [2021-08-12 21:46:05,235 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) [2021-08-12 21:46:05,236 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) [2021-08-12 21:46:05,236 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) [2021-08-12 21:46:05,236 INFO L348 CegarLoopForPetriNet]: 409 programPoint places, 1 predicate places. [2021-08-12 21:46:05,236 INFO L482 AbstractCegarLoop]: Abstraction has has 410 places, 245 transitions, 7377 flow [2021-08-12 21:46:05,237 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) [2021-08-12 21:46:05,237 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:05,237 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] [2021-08-12 21:46:05,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-08-12 21:46:05,237 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:05,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:05,237 INFO L82 PathProgramCache]: Analyzing trace with hash 804956825, now seen corresponding path program 1 times [2021-08-12 21:46:05,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:05,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289391962] [2021-08-12 21:46:05,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:05,259 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:05,262 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:05,277 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:05,277 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:05,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-08-12 21:46:05,277 WARN L235 ceAbstractionStarter]: 81 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:05,277 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 82 thread instances. [2021-08-12 21:46:05,348 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:05,348 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:05,348 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:05,348 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:05,349 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:05,349 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:05,349 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:05,349 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:05,349 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:05,349 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:05,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 416 places, 251 transitions, 7554 flow [2021-08-12 21:46:05,486 INFO L129 PetriNetUnfolder]: 0/497 cut-off events. [2021-08-12 21:46:05,486 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:05,486 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. [2021-08-12 21:46:05,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 416 places, 251 transitions, 7554 flow [2021-08-12 21:46:05,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 414 places, 249 transitions, 7550 flow [2021-08-12 21:46:05,490 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:05,490 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:05,490 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:05,490 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:05,490 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:05,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:05,491 INFO L82 PathProgramCache]: Analyzing trace with hash 340867, now seen corresponding path program 1 times [2021-08-12 21:46:05,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:05,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104167113] [2021-08-12 21:46:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:05,512 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:05,512 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:05,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:05,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104167113] [2021-08-12 21:46:05,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104167113] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:05,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:05,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:05,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148404298] [2021-08-12 21:46:05,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:05,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:05,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:05,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:05,516 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 251 [2021-08-12 21:46:05,517 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) [2021-08-12 21:46:05,517 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:05,517 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 251 [2021-08-12 21:46:05,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:05,628 INFO L129 PetriNetUnfolder]: 0/248 cut-off events. [2021-08-12 21:46:05,628 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:05,628 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. [2021-08-12 21:46:05,629 INFO L132 encePairwiseOnDemand]: 249/251 looper letters, 0 selfloop transitions, 1 changer transitions 0/248 dead transitions. [2021-08-12 21:46:05,629 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 248 transitions, 7550 flow [2021-08-12 21:46:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2021-08-12 21:46:05,630 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9907038512616202 [2021-08-12 21:46:05,630 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2021-08-12 21:46:05,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2021-08-12 21:46:05,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:05,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2021-08-12 21:46:05,631 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) [2021-08-12 21:46:05,632 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) [2021-08-12 21:46:05,632 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) [2021-08-12 21:46:05,632 INFO L348 CegarLoopForPetriNet]: 414 programPoint places, 1 predicate places. [2021-08-12 21:46:05,632 INFO L482 AbstractCegarLoop]: Abstraction has has 415 places, 248 transitions, 7550 flow [2021-08-12 21:46:05,632 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) [2021-08-12 21:46:05,632 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:05,632 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] [2021-08-12 21:46:05,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-08-12 21:46:05,633 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:05,633 INFO L82 PathProgramCache]: Analyzing trace with hash 170821411, now seen corresponding path program 1 times [2021-08-12 21:46:05,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:05,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083292446] [2021-08-12 21:46:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:05,656 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:05,659 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:05,674 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:05,674 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:05,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-08-12 21:46:05,674 WARN L235 ceAbstractionStarter]: 82 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:05,674 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 83 thread instances. [2021-08-12 21:46:05,754 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:05,755 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:05,755 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:05,755 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:05,755 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:05,755 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:05,755 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:05,755 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:05,755 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:05,756 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:05,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 421 places, 254 transitions, 7729 flow [2021-08-12 21:46:05,988 INFO L129 PetriNetUnfolder]: 0/503 cut-off events. [2021-08-12 21:46:05,989 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:05,989 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. [2021-08-12 21:46:05,989 INFO L82 GeneralOperation]: Start removeDead. Operand has 421 places, 254 transitions, 7729 flow [2021-08-12 21:46:05,992 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 419 places, 252 transitions, 7725 flow [2021-08-12 21:46:05,992 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:05,992 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:05,992 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:05,992 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:05,992 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:05,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:05,993 INFO L82 PathProgramCache]: Analyzing trace with hash 348995, now seen corresponding path program 1 times [2021-08-12 21:46:05,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:05,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284795446] [2021-08-12 21:46:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:06,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:06,011 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:06,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:06,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284795446] [2021-08-12 21:46:06,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284795446] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:06,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:06,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:06,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953022246] [2021-08-12 21:46:06,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:06,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:06,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:06,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:06,015 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 254 [2021-08-12 21:46:06,015 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) [2021-08-12 21:46:06,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:06,015 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 254 [2021-08-12 21:46:06,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:06,102 INFO L129 PetriNetUnfolder]: 0/251 cut-off events. [2021-08-12 21:46:06,103 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:06,103 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. [2021-08-12 21:46:06,103 INFO L132 encePairwiseOnDemand]: 252/254 looper letters, 0 selfloop transitions, 1 changer transitions 0/251 dead transitions. [2021-08-12 21:46:06,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 251 transitions, 7725 flow [2021-08-12 21:46:06,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:06,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:06,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2021-08-12 21:46:06,105 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9908136482939632 [2021-08-12 21:46:06,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2021-08-12 21:46:06,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2021-08-12 21:46:06,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:06,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2021-08-12 21:46:06,106 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) [2021-08-12 21:46:06,106 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) [2021-08-12 21:46:06,107 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) [2021-08-12 21:46:06,107 INFO L348 CegarLoopForPetriNet]: 419 programPoint places, 1 predicate places. [2021-08-12 21:46:06,107 INFO L482 AbstractCegarLoop]: Abstraction has has 420 places, 251 transitions, 7725 flow [2021-08-12 21:46:06,107 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) [2021-08-12 21:46:06,107 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:06,107 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] [2021-08-12 21:46:06,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-08-12 21:46:06,107 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:06,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:06,107 INFO L82 PathProgramCache]: Analyzing trace with hash -69961871, now seen corresponding path program 1 times [2021-08-12 21:46:06,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:06,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357529639] [2021-08-12 21:46:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:06,130 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:06,132 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:06,145 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:06,145 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:06,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-08-12 21:46:06,145 WARN L235 ceAbstractionStarter]: 83 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:06,145 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 84 thread instances. [2021-08-12 21:46:06,212 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:06,212 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:06,212 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:06,212 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:06,213 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:06,213 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:06,213 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:06,213 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:06,213 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:06,213 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:06,215 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 426 places, 257 transitions, 7906 flow [2021-08-12 21:46:06,325 INFO L129 PetriNetUnfolder]: 0/509 cut-off events. [2021-08-12 21:46:06,325 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:06,326 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. [2021-08-12 21:46:06,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 426 places, 257 transitions, 7906 flow [2021-08-12 21:46:06,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 424 places, 255 transitions, 7902 flow [2021-08-12 21:46:06,329 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:06,329 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:06,329 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:06,329 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:06,329 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:06,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:06,329 INFO L82 PathProgramCache]: Analyzing trace with hash 357219, now seen corresponding path program 1 times [2021-08-12 21:46:06,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:06,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214978577] [2021-08-12 21:46:06,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:06,350 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:06,350 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:06,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:06,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214978577] [2021-08-12 21:46:06,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214978577] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:06,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:06,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:06,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662424427] [2021-08-12 21:46:06,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:06,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:06,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:06,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:06,354 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 257 [2021-08-12 21:46:06,354 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) [2021-08-12 21:46:06,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:06,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 257 [2021-08-12 21:46:06,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:06,440 INFO L129 PetriNetUnfolder]: 0/254 cut-off events. [2021-08-12 21:46:06,440 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:06,440 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. [2021-08-12 21:46:06,441 INFO L132 encePairwiseOnDemand]: 255/257 looper letters, 0 selfloop transitions, 1 changer transitions 0/254 dead transitions. [2021-08-12 21:46:06,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 254 transitions, 7902 flow [2021-08-12 21:46:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:06,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2021-08-12 21:46:06,442 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9909208819714657 [2021-08-12 21:46:06,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2021-08-12 21:46:06,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2021-08-12 21:46:06,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:06,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2021-08-12 21:46:06,443 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) [2021-08-12 21:46:06,444 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) [2021-08-12 21:46:06,444 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) [2021-08-12 21:46:06,444 INFO L348 CegarLoopForPetriNet]: 424 programPoint places, 1 predicate places. [2021-08-12 21:46:06,444 INFO L482 AbstractCegarLoop]: Abstraction has has 425 places, 254 transitions, 7902 flow [2021-08-12 21:46:06,444 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) [2021-08-12 21:46:06,444 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:06,444 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] [2021-08-12 21:46:06,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-08-12 21:46:06,444 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:06,444 INFO L82 PathProgramCache]: Analyzing trace with hash 909733606, now seen corresponding path program 1 times [2021-08-12 21:46:06,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:06,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383453325] [2021-08-12 21:46:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:06,465 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:06,467 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:06,481 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:06,481 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:06,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-08-12 21:46:06,481 WARN L235 ceAbstractionStarter]: 84 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:06,481 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 85 thread instances. [2021-08-12 21:46:06,549 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:06,549 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:06,550 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:06,550 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:06,550 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:06,550 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:06,550 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:06,550 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:06,550 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:06,550 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:06,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 431 places, 260 transitions, 8085 flow [2021-08-12 21:46:06,661 INFO L129 PetriNetUnfolder]: 0/515 cut-off events. [2021-08-12 21:46:06,662 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:06,662 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. [2021-08-12 21:46:06,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 431 places, 260 transitions, 8085 flow [2021-08-12 21:46:06,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 429 places, 258 transitions, 8081 flow [2021-08-12 21:46:06,666 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:06,666 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:06,666 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:06,666 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:06,666 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:06,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:06,666 INFO L82 PathProgramCache]: Analyzing trace with hash 365539, now seen corresponding path program 1 times [2021-08-12 21:46:06,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:06,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554824139] [2021-08-12 21:46:06,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:06,688 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:06,688 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:06,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:06,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554824139] [2021-08-12 21:46:06,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554824139] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:06,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:06,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:06,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97897203] [2021-08-12 21:46:06,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:06,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:06,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:06,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:06,691 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 260 [2021-08-12 21:46:06,692 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) [2021-08-12 21:46:06,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:06,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 260 [2021-08-12 21:46:06,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:06,791 INFO L129 PetriNetUnfolder]: 0/257 cut-off events. [2021-08-12 21:46:06,791 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:06,791 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. [2021-08-12 21:46:06,792 INFO L132 encePairwiseOnDemand]: 258/260 looper letters, 0 selfloop transitions, 1 changer transitions 0/257 dead transitions. [2021-08-12 21:46:06,792 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 257 transitions, 8081 flow [2021-08-12 21:46:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:06,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2021-08-12 21:46:06,792 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9910256410256411 [2021-08-12 21:46:06,792 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2021-08-12 21:46:06,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2021-08-12 21:46:06,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:06,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2021-08-12 21:46:06,793 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) [2021-08-12 21:46:06,794 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) [2021-08-12 21:46:06,794 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) [2021-08-12 21:46:06,794 INFO L348 CegarLoopForPetriNet]: 429 programPoint places, 1 predicate places. [2021-08-12 21:46:06,794 INFO L482 AbstractCegarLoop]: Abstraction has has 430 places, 257 transitions, 8081 flow [2021-08-12 21:46:06,795 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) [2021-08-12 21:46:06,795 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:06,795 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] [2021-08-12 21:46:06,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-08-12 21:46:06,795 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:06,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:06,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2041095531, now seen corresponding path program 1 times [2021-08-12 21:46:06,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:06,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815837155] [2021-08-12 21:46:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:06,817 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:06,819 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:06,832 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:06,833 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:06,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-08-12 21:46:06,833 WARN L235 ceAbstractionStarter]: 85 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:06,833 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 86 thread instances. [2021-08-12 21:46:06,910 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:06,911 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:06,987 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:06,987 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:06,987 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:06,987 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:06,987 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:06,987 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:06,987 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:06,987 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:06,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 436 places, 263 transitions, 8266 flow [2021-08-12 21:46:07,142 INFO L129 PetriNetUnfolder]: 0/521 cut-off events. [2021-08-12 21:46:07,143 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:07,143 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. [2021-08-12 21:46:07,143 INFO L82 GeneralOperation]: Start removeDead. Operand has 436 places, 263 transitions, 8266 flow [2021-08-12 21:46:07,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 434 places, 261 transitions, 8262 flow [2021-08-12 21:46:07,147 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:07,147 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:07,147 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:07,147 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:07,147 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:07,147 INFO L82 PathProgramCache]: Analyzing trace with hash 373955, now seen corresponding path program 1 times [2021-08-12 21:46:07,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:07,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846599126] [2021-08-12 21:46:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:07,185 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:07,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:07,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:07,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846599126] [2021-08-12 21:46:07,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846599126] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:07,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:07,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:07,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583830217] [2021-08-12 21:46:07,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:07,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:07,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:07,190 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 263 [2021-08-12 21:46:07,191 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) [2021-08-12 21:46:07,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:07,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 263 [2021-08-12 21:46:07,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:07,278 INFO L129 PetriNetUnfolder]: 0/260 cut-off events. [2021-08-12 21:46:07,278 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:07,278 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. [2021-08-12 21:46:07,279 INFO L132 encePairwiseOnDemand]: 261/263 looper letters, 0 selfloop transitions, 1 changer transitions 0/260 dead transitions. [2021-08-12 21:46:07,279 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 260 transitions, 8262 flow [2021-08-12 21:46:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:07,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:07,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2021-08-12 21:46:07,284 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.991128010139417 [2021-08-12 21:46:07,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2021-08-12 21:46:07,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2021-08-12 21:46:07,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:07,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2021-08-12 21:46:07,288 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) [2021-08-12 21:46:07,289 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) [2021-08-12 21:46:07,289 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) [2021-08-12 21:46:07,289 INFO L348 CegarLoopForPetriNet]: 434 programPoint places, 1 predicate places. [2021-08-12 21:46:07,289 INFO L482 AbstractCegarLoop]: Abstraction has has 435 places, 260 transitions, 8262 flow [2021-08-12 21:46:07,289 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) [2021-08-12 21:46:07,289 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:07,289 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] [2021-08-12 21:46:07,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-08-12 21:46:07,289 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:07,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:07,289 INFO L82 PathProgramCache]: Analyzing trace with hash -542989463, now seen corresponding path program 1 times [2021-08-12 21:46:07,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:07,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940724421] [2021-08-12 21:46:07,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:07,311 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:07,313 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:07,327 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:07,327 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:07,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-08-12 21:46:07,328 WARN L235 ceAbstractionStarter]: 86 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:07,328 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 87 thread instances. [2021-08-12 21:46:07,394 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:07,394 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:07,394 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:07,394 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:07,394 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:07,394 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:07,395 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:07,395 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:07,395 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:07,395 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:07,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 441 places, 266 transitions, 8449 flow [2021-08-12 21:46:07,508 INFO L129 PetriNetUnfolder]: 0/527 cut-off events. [2021-08-12 21:46:07,509 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:07,509 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. [2021-08-12 21:46:07,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 441 places, 266 transitions, 8449 flow [2021-08-12 21:46:07,512 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 439 places, 264 transitions, 8445 flow [2021-08-12 21:46:07,512 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:07,512 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:07,512 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:07,512 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:07,512 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash 382467, now seen corresponding path program 1 times [2021-08-12 21:46:07,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:07,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872827247] [2021-08-12 21:46:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:07,533 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:07,533 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:07,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:07,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872827247] [2021-08-12 21:46:07,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872827247] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:07,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:07,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:07,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872385685] [2021-08-12 21:46:07,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:07,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:07,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:07,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:07,536 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 266 [2021-08-12 21:46:07,537 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) [2021-08-12 21:46:07,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:07,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 266 [2021-08-12 21:46:07,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:07,625 INFO L129 PetriNetUnfolder]: 0/263 cut-off events. [2021-08-12 21:46:07,626 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:07,626 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. [2021-08-12 21:46:07,627 INFO L132 encePairwiseOnDemand]: 264/266 looper letters, 0 selfloop transitions, 1 changer transitions 0/263 dead transitions. [2021-08-12 21:46:07,627 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 263 transitions, 8445 flow [2021-08-12 21:46:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:07,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 791 transitions. [2021-08-12 21:46:07,627 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9912280701754386 [2021-08-12 21:46:07,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 791 transitions. [2021-08-12 21:46:07,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 791 transitions. [2021-08-12 21:46:07,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:07,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 791 transitions. [2021-08-12 21:46:07,628 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) [2021-08-12 21:46:07,629 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) [2021-08-12 21:46:07,629 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) [2021-08-12 21:46:07,629 INFO L348 CegarLoopForPetriNet]: 439 programPoint places, 1 predicate places. [2021-08-12 21:46:07,629 INFO L482 AbstractCegarLoop]: Abstraction has has 440 places, 263 transitions, 8445 flow [2021-08-12 21:46:07,630 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) [2021-08-12 21:46:07,630 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:07,630 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] [2021-08-12 21:46:07,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-08-12 21:46:07,630 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:07,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2057549701, now seen corresponding path program 1 times [2021-08-12 21:46:07,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:07,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080380987] [2021-08-12 21:46:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:07,652 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:07,654 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:07,670 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:07,670 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:07,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-08-12 21:46:07,670 WARN L235 ceAbstractionStarter]: 87 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:07,670 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 88 thread instances. [2021-08-12 21:46:07,738 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:07,738 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:07,739 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:07,739 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:07,739 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:07,739 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:07,739 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:07,739 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:07,739 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:07,739 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:07,742 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 446 places, 269 transitions, 8634 flow [2021-08-12 21:46:07,858 INFO L129 PetriNetUnfolder]: 0/533 cut-off events. [2021-08-12 21:46:07,858 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:07,858 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. [2021-08-12 21:46:07,858 INFO L82 GeneralOperation]: Start removeDead. Operand has 446 places, 269 transitions, 8634 flow [2021-08-12 21:46:07,862 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 444 places, 267 transitions, 8630 flow [2021-08-12 21:46:07,862 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:07,862 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:07,862 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:07,862 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:07,862 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash 391075, now seen corresponding path program 1 times [2021-08-12 21:46:07,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:07,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375832285] [2021-08-12 21:46:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:07,883 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:07,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:07,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:07,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375832285] [2021-08-12 21:46:07,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375832285] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:07,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:07,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:07,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424010214] [2021-08-12 21:46:07,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:07,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:07,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:07,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:07,886 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 269 [2021-08-12 21:46:07,887 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) [2021-08-12 21:46:07,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:07,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 269 [2021-08-12 21:46:07,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:07,979 INFO L129 PetriNetUnfolder]: 0/266 cut-off events. [2021-08-12 21:46:07,979 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:07,979 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. [2021-08-12 21:46:07,980 INFO L132 encePairwiseOnDemand]: 267/269 looper letters, 0 selfloop transitions, 1 changer transitions 0/266 dead transitions. [2021-08-12 21:46:07,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 266 transitions, 8630 flow [2021-08-12 21:46:07,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2021-08-12 21:46:07,981 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9913258983890955 [2021-08-12 21:46:07,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2021-08-12 21:46:07,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2021-08-12 21:46:07,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:07,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2021-08-12 21:46:07,981 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) [2021-08-12 21:46:07,982 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) [2021-08-12 21:46:07,982 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) [2021-08-12 21:46:07,982 INFO L348 CegarLoopForPetriNet]: 444 programPoint places, 1 predicate places. [2021-08-12 21:46:07,982 INFO L482 AbstractCegarLoop]: Abstraction has has 445 places, 266 transitions, 8630 flow [2021-08-12 21:46:07,982 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) [2021-08-12 21:46:07,982 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:07,983 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] [2021-08-12 21:46:07,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-08-12 21:46:07,983 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:07,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:07,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2031919404, now seen corresponding path program 1 times [2021-08-12 21:46:07,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:07,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402401044] [2021-08-12 21:46:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:08,008 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:08,010 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:08,025 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:08,026 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:08,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-08-12 21:46:08,026 WARN L235 ceAbstractionStarter]: 88 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:08,026 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 89 thread instances. [2021-08-12 21:46:08,094 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:08,094 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:08,094 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:08,094 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:08,095 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:08,095 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:08,095 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:08,095 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:08,095 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:08,095 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:08,097 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 451 places, 272 transitions, 8821 flow [2021-08-12 21:46:08,226 INFO L129 PetriNetUnfolder]: 0/539 cut-off events. [2021-08-12 21:46:08,227 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:08,227 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. [2021-08-12 21:46:08,227 INFO L82 GeneralOperation]: Start removeDead. Operand has 451 places, 272 transitions, 8821 flow [2021-08-12 21:46:08,230 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 449 places, 270 transitions, 8817 flow [2021-08-12 21:46:08,231 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:08,231 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:08,231 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:08,231 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:08,231 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:08,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:08,231 INFO L82 PathProgramCache]: Analyzing trace with hash 399779, now seen corresponding path program 1 times [2021-08-12 21:46:08,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:08,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871310653] [2021-08-12 21:46:08,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:08,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:08,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:08,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:08,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871310653] [2021-08-12 21:46:08,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871310653] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:08,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:08,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:08,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556966771] [2021-08-12 21:46:08,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:08,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:08,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:08,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:08,257 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 272 [2021-08-12 21:46:08,257 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) [2021-08-12 21:46:08,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:08,257 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 272 [2021-08-12 21:46:08,257 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:08,449 INFO L129 PetriNetUnfolder]: 0/269 cut-off events. [2021-08-12 21:46:08,449 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:08,449 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. [2021-08-12 21:46:08,450 INFO L132 encePairwiseOnDemand]: 270/272 looper letters, 0 selfloop transitions, 1 changer transitions 0/269 dead transitions. [2021-08-12 21:46:08,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 269 transitions, 8817 flow [2021-08-12 21:46:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:08,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 809 transitions. [2021-08-12 21:46:08,450 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.991421568627451 [2021-08-12 21:46:08,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 809 transitions. [2021-08-12 21:46:08,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 809 transitions. [2021-08-12 21:46:08,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:08,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 809 transitions. [2021-08-12 21:46:08,452 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) [2021-08-12 21:46:08,452 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) [2021-08-12 21:46:08,452 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) [2021-08-12 21:46:08,452 INFO L348 CegarLoopForPetriNet]: 449 programPoint places, 1 predicate places. [2021-08-12 21:46:08,452 INFO L482 AbstractCegarLoop]: Abstraction has has 450 places, 269 transitions, 8817 flow [2021-08-12 21:46:08,452 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) [2021-08-12 21:46:08,453 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:08,453 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] [2021-08-12 21:46:08,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-08-12 21:46:08,453 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:08,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:08,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1915211327, now seen corresponding path program 1 times [2021-08-12 21:46:08,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:08,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789878347] [2021-08-12 21:46:08,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:08,481 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:08,483 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:08,500 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:08,501 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:08,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-08-12 21:46:08,501 WARN L235 ceAbstractionStarter]: 89 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:08,501 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 90 thread instances. [2021-08-12 21:46:08,574 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:08,574 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:08,575 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:08,575 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:08,575 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:08,575 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:08,575 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:08,575 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:08,575 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:08,575 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:08,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 456 places, 275 transitions, 9010 flow [2021-08-12 21:46:08,702 INFO L129 PetriNetUnfolder]: 0/545 cut-off events. [2021-08-12 21:46:08,703 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:08,703 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. [2021-08-12 21:46:08,703 INFO L82 GeneralOperation]: Start removeDead. Operand has 456 places, 275 transitions, 9010 flow [2021-08-12 21:46:08,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 454 places, 273 transitions, 9006 flow [2021-08-12 21:46:08,707 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:08,707 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:08,707 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:08,707 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:08,707 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:08,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:08,707 INFO L82 PathProgramCache]: Analyzing trace with hash 408579, now seen corresponding path program 1 times [2021-08-12 21:46:08,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:08,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059439579] [2021-08-12 21:46:08,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:08,729 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:08,729 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:08,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:08,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059439579] [2021-08-12 21:46:08,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059439579] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:08,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:08,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:08,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328534620] [2021-08-12 21:46:08,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:08,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:08,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:08,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:08,732 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 275 [2021-08-12 21:46:08,733 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) [2021-08-12 21:46:08,733 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:08,733 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 275 [2021-08-12 21:46:08,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:08,832 INFO L129 PetriNetUnfolder]: 0/272 cut-off events. [2021-08-12 21:46:08,832 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:08,832 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. [2021-08-12 21:46:08,832 INFO L132 encePairwiseOnDemand]: 273/275 looper letters, 0 selfloop transitions, 1 changer transitions 0/272 dead transitions. [2021-08-12 21:46:08,833 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 272 transitions, 9006 flow [2021-08-12 21:46:08,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 818 transitions. [2021-08-12 21:46:08,833 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9915151515151515 [2021-08-12 21:46:08,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 818 transitions. [2021-08-12 21:46:08,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 818 transitions. [2021-08-12 21:46:08,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:08,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 818 transitions. [2021-08-12 21:46:08,834 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) [2021-08-12 21:46:08,835 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) [2021-08-12 21:46:08,835 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) [2021-08-12 21:46:08,835 INFO L348 CegarLoopForPetriNet]: 454 programPoint places, 1 predicate places. [2021-08-12 21:46:08,835 INFO L482 AbstractCegarLoop]: Abstraction has has 455 places, 272 transitions, 9006 flow [2021-08-12 21:46:08,835 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) [2021-08-12 21:46:08,835 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:08,835 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] [2021-08-12 21:46:08,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-08-12 21:46:08,835 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:08,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:08,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1288938671, now seen corresponding path program 1 times [2021-08-12 21:46:08,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:08,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385272271] [2021-08-12 21:46:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:08,857 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:08,859 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:08,876 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:08,876 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:08,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-08-12 21:46:08,877 WARN L235 ceAbstractionStarter]: 90 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:08,877 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 91 thread instances. [2021-08-12 21:46:08,944 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:08,945 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:08,945 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:08,945 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:08,945 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:08,945 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:08,945 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:08,945 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:08,945 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:08,945 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:08,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 461 places, 278 transitions, 9201 flow [2021-08-12 21:46:09,070 INFO L129 PetriNetUnfolder]: 0/551 cut-off events. [2021-08-12 21:46:09,071 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:09,071 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. [2021-08-12 21:46:09,071 INFO L82 GeneralOperation]: Start removeDead. Operand has 461 places, 278 transitions, 9201 flow [2021-08-12 21:46:09,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 459 places, 276 transitions, 9197 flow [2021-08-12 21:46:09,074 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:09,074 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:09,074 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:09,075 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:09,075 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:09,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:09,075 INFO L82 PathProgramCache]: Analyzing trace with hash 417475, now seen corresponding path program 1 times [2021-08-12 21:46:09,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:09,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341741141] [2021-08-12 21:46:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:09,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:09,097 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:09,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:09,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341741141] [2021-08-12 21:46:09,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341741141] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:09,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:09,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:09,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891575508] [2021-08-12 21:46:09,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:09,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:09,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:09,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:09,100 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 278 [2021-08-12 21:46:09,100 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) [2021-08-12 21:46:09,100 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:09,101 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 278 [2021-08-12 21:46:09,101 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:09,200 INFO L129 PetriNetUnfolder]: 0/275 cut-off events. [2021-08-12 21:46:09,200 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:09,201 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. [2021-08-12 21:46:09,201 INFO L132 encePairwiseOnDemand]: 276/278 looper letters, 0 selfloop transitions, 1 changer transitions 0/275 dead transitions. [2021-08-12 21:46:09,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 275 transitions, 9197 flow [2021-08-12 21:46:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 827 transitions. [2021-08-12 21:46:09,202 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9916067146282974 [2021-08-12 21:46:09,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 827 transitions. [2021-08-12 21:46:09,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 827 transitions. [2021-08-12 21:46:09,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:09,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 827 transitions. [2021-08-12 21:46:09,203 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) [2021-08-12 21:46:09,204 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) [2021-08-12 21:46:09,204 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) [2021-08-12 21:46:09,204 INFO L348 CegarLoopForPetriNet]: 459 programPoint places, 1 predicate places. [2021-08-12 21:46:09,204 INFO L482 AbstractCegarLoop]: Abstraction has has 460 places, 275 transitions, 9197 flow [2021-08-12 21:46:09,204 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) [2021-08-12 21:46:09,204 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:09,204 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] [2021-08-12 21:46:09,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-08-12 21:46:09,204 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:09,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1788980425, now seen corresponding path program 1 times [2021-08-12 21:46:09,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:09,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346144786] [2021-08-12 21:46:09,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:09,226 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:09,229 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:09,244 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:09,244 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:09,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-08-12 21:46:09,245 WARN L235 ceAbstractionStarter]: 91 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:09,245 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 92 thread instances. [2021-08-12 21:46:09,321 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:09,322 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:09,322 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:09,322 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:09,322 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:09,322 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:09,322 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:09,322 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:09,322 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:09,322 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:09,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 466 places, 281 transitions, 9394 flow [2021-08-12 21:46:09,449 INFO L129 PetriNetUnfolder]: 0/557 cut-off events. [2021-08-12 21:46:09,449 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:09,449 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. [2021-08-12 21:46:09,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 466 places, 281 transitions, 9394 flow [2021-08-12 21:46:09,453 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 464 places, 279 transitions, 9390 flow [2021-08-12 21:46:09,453 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:09,453 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:09,453 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:09,453 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:09,453 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash 426467, now seen corresponding path program 1 times [2021-08-12 21:46:09,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:09,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711902349] [2021-08-12 21:46:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:09,475 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:09,476 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:09,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:09,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711902349] [2021-08-12 21:46:09,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711902349] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:09,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:09,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:09,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365598480] [2021-08-12 21:46:09,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:09,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:09,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:09,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:09,479 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 281 [2021-08-12 21:46:09,479 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) [2021-08-12 21:46:09,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:09,479 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 281 [2021-08-12 21:46:09,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:09,581 INFO L129 PetriNetUnfolder]: 0/278 cut-off events. [2021-08-12 21:46:09,581 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:09,582 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. [2021-08-12 21:46:09,582 INFO L132 encePairwiseOnDemand]: 279/281 looper letters, 0 selfloop transitions, 1 changer transitions 0/278 dead transitions. [2021-08-12 21:46:09,582 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 278 transitions, 9390 flow [2021-08-12 21:46:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2021-08-12 21:46:09,583 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9916963226571768 [2021-08-12 21:46:09,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2021-08-12 21:46:09,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2021-08-12 21:46:09,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:09,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2021-08-12 21:46:09,584 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) [2021-08-12 21:46:09,584 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) [2021-08-12 21:46:09,585 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) [2021-08-12 21:46:09,585 INFO L348 CegarLoopForPetriNet]: 464 programPoint places, 1 predicate places. [2021-08-12 21:46:09,585 INFO L482 AbstractCegarLoop]: Abstraction has has 465 places, 278 transitions, 9390 flow [2021-08-12 21:46:09,585 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) [2021-08-12 21:46:09,585 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:09,585 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] [2021-08-12 21:46:09,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2021-08-12 21:46:09,585 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:09,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:09,585 INFO L82 PathProgramCache]: Analyzing trace with hash 601729650, now seen corresponding path program 1 times [2021-08-12 21:46:09,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:09,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158272220] [2021-08-12 21:46:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:09,607 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:09,609 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:09,625 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:09,625 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:09,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-08-12 21:46:09,625 WARN L235 ceAbstractionStarter]: 92 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:09,625 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 93 thread instances. [2021-08-12 21:46:09,698 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:09,698 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:09,699 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:09,699 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:09,699 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:09,699 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:09,699 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:09,699 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:09,699 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:09,699 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:09,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 471 places, 284 transitions, 9589 flow [2021-08-12 21:46:09,864 INFO L129 PetriNetUnfolder]: 0/563 cut-off events. [2021-08-12 21:46:09,864 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:09,864 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. [2021-08-12 21:46:09,864 INFO L82 GeneralOperation]: Start removeDead. Operand has 471 places, 284 transitions, 9589 flow [2021-08-12 21:46:09,868 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 469 places, 282 transitions, 9585 flow [2021-08-12 21:46:09,869 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:09,869 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:09,869 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:09,869 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:09,869 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:09,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:09,869 INFO L82 PathProgramCache]: Analyzing trace with hash 435555, now seen corresponding path program 1 times [2021-08-12 21:46:09,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:09,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144844075] [2021-08-12 21:46:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:09,892 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:09,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:09,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:09,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144844075] [2021-08-12 21:46:09,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144844075] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:09,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:09,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:09,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090244856] [2021-08-12 21:46:09,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:09,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:09,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:09,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:09,896 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 284 [2021-08-12 21:46:09,896 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) [2021-08-12 21:46:09,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:09,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 284 [2021-08-12 21:46:09,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:10,135 INFO L129 PetriNetUnfolder]: 0/281 cut-off events. [2021-08-12 21:46:10,136 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:10,136 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. [2021-08-12 21:46:10,137 INFO L132 encePairwiseOnDemand]: 282/284 looper letters, 0 selfloop transitions, 1 changer transitions 0/281 dead transitions. [2021-08-12 21:46:10,137 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 281 transitions, 9585 flow [2021-08-12 21:46:10,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:10,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 845 transitions. [2021-08-12 21:46:10,138 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9917840375586855 [2021-08-12 21:46:10,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 845 transitions. [2021-08-12 21:46:10,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 845 transitions. [2021-08-12 21:46:10,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:10,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 845 transitions. [2021-08-12 21:46:10,139 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) [2021-08-12 21:46:10,139 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) [2021-08-12 21:46:10,139 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) [2021-08-12 21:46:10,140 INFO L348 CegarLoopForPetriNet]: 469 programPoint places, 1 predicate places. [2021-08-12 21:46:10,140 INFO L482 AbstractCegarLoop]: Abstraction has has 470 places, 281 transitions, 9585 flow [2021-08-12 21:46:10,140 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) [2021-08-12 21:46:10,140 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:10,140 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] [2021-08-12 21:46:10,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-08-12 21:46:10,140 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:10,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:10,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1765061603, now seen corresponding path program 1 times [2021-08-12 21:46:10,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:10,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991751799] [2021-08-12 21:46:10,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:10,166 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:10,169 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:10,187 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:10,187 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:10,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-08-12 21:46:10,187 WARN L235 ceAbstractionStarter]: 93 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:10,188 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 94 thread instances. [2021-08-12 21:46:10,267 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:10,267 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:10,268 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:10,268 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:10,268 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:10,268 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:10,268 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:10,268 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:10,268 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:10,268 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:10,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 476 places, 287 transitions, 9786 flow [2021-08-12 21:46:10,428 INFO L129 PetriNetUnfolder]: 0/569 cut-off events. [2021-08-12 21:46:10,428 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:10,428 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. [2021-08-12 21:46:10,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 476 places, 287 transitions, 9786 flow [2021-08-12 21:46:10,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 474 places, 285 transitions, 9782 flow [2021-08-12 21:46:10,433 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:10,434 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:10,434 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:10,434 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:10,434 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:10,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:10,434 INFO L82 PathProgramCache]: Analyzing trace with hash 444739, now seen corresponding path program 1 times [2021-08-12 21:46:10,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:10,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978358623] [2021-08-12 21:46:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:10,458 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:10,459 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:10,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:10,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978358623] [2021-08-12 21:46:10,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978358623] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:10,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:10,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:10,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165729532] [2021-08-12 21:46:10,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:10,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:10,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:10,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:10,462 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 287 [2021-08-12 21:46:10,463 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) [2021-08-12 21:46:10,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:10,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 287 [2021-08-12 21:46:10,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:10,590 INFO L129 PetriNetUnfolder]: 0/284 cut-off events. [2021-08-12 21:46:10,590 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:10,590 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. [2021-08-12 21:46:10,591 INFO L132 encePairwiseOnDemand]: 285/287 looper letters, 0 selfloop transitions, 1 changer transitions 0/284 dead transitions. [2021-08-12 21:46:10,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 284 transitions, 9782 flow [2021-08-12 21:46:10,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 854 transitions. [2021-08-12 21:46:10,592 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.991869918699187 [2021-08-12 21:46:10,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 854 transitions. [2021-08-12 21:46:10,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 854 transitions. [2021-08-12 21:46:10,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:10,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 854 transitions. [2021-08-12 21:46:10,593 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) [2021-08-12 21:46:10,594 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) [2021-08-12 21:46:10,594 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) [2021-08-12 21:46:10,594 INFO L348 CegarLoopForPetriNet]: 474 programPoint places, 1 predicate places. [2021-08-12 21:46:10,594 INFO L482 AbstractCegarLoop]: Abstraction has has 475 places, 284 transitions, 9782 flow [2021-08-12 21:46:10,594 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) [2021-08-12 21:46:10,594 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:10,594 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] [2021-08-12 21:46:10,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-08-12 21:46:10,594 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:10,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:10,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1280676107, now seen corresponding path program 1 times [2021-08-12 21:46:10,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:10,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045018981] [2021-08-12 21:46:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:10,619 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:10,622 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:10,640 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:10,640 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:10,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-08-12 21:46:10,640 WARN L235 ceAbstractionStarter]: 94 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:10,640 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 95 thread instances. [2021-08-12 21:46:10,733 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:10,733 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:10,734 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:10,734 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:10,734 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:10,734 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:10,734 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:10,734 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:10,734 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:10,734 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:10,737 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 481 places, 290 transitions, 9985 flow [2021-08-12 21:46:10,891 INFO L129 PetriNetUnfolder]: 0/575 cut-off events. [2021-08-12 21:46:10,891 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:10,891 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. [2021-08-12 21:46:10,891 INFO L82 GeneralOperation]: Start removeDead. Operand has 481 places, 290 transitions, 9985 flow [2021-08-12 21:46:10,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 479 places, 288 transitions, 9981 flow [2021-08-12 21:46:10,895 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:10,895 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:10,896 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:10,896 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:10,896 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:10,896 INFO L82 PathProgramCache]: Analyzing trace with hash 454019, now seen corresponding path program 1 times [2021-08-12 21:46:10,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:10,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660536272] [2021-08-12 21:46:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:10,920 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:10,921 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:10,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:10,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660536272] [2021-08-12 21:46:10,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660536272] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:10,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:10,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:10,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890403353] [2021-08-12 21:46:10,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:10,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:10,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:10,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:10,924 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 290 [2021-08-12 21:46:10,924 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) [2021-08-12 21:46:10,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:10,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 290 [2021-08-12 21:46:10,925 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:11,059 INFO L129 PetriNetUnfolder]: 0/287 cut-off events. [2021-08-12 21:46:11,059 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:11,059 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. [2021-08-12 21:46:11,060 INFO L132 encePairwiseOnDemand]: 288/290 looper letters, 0 selfloop transitions, 1 changer transitions 0/287 dead transitions. [2021-08-12 21:46:11,061 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 287 transitions, 9981 flow [2021-08-12 21:46:11,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:11,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 863 transitions. [2021-08-12 21:46:11,062 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9919540229885058 [2021-08-12 21:46:11,062 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 863 transitions. [2021-08-12 21:46:11,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 863 transitions. [2021-08-12 21:46:11,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:11,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 863 transitions. [2021-08-12 21:46:11,063 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) [2021-08-12 21:46:11,063 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) [2021-08-12 21:46:11,064 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) [2021-08-12 21:46:11,064 INFO L348 CegarLoopForPetriNet]: 479 programPoint places, 1 predicate places. [2021-08-12 21:46:11,064 INFO L482 AbstractCegarLoop]: Abstraction has has 480 places, 287 transitions, 9981 flow [2021-08-12 21:46:11,064 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) [2021-08-12 21:46:11,064 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:11,064 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] [2021-08-12 21:46:11,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-08-12 21:46:11,064 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:11,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:11,064 INFO L82 PathProgramCache]: Analyzing trace with hash -758222019, now seen corresponding path program 1 times [2021-08-12 21:46:11,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:11,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217400063] [2021-08-12 21:46:11,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:11,091 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:11,093 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:11,112 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:11,113 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:11,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-08-12 21:46:11,113 WARN L235 ceAbstractionStarter]: 95 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:11,113 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 96 thread instances. [2021-08-12 21:46:11,196 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:11,197 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:11,197 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:11,197 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:11,197 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:11,197 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:11,197 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:11,197 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:11,197 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:11,197 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:11,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 486 places, 293 transitions, 10186 flow [2021-08-12 21:46:11,371 INFO L129 PetriNetUnfolder]: 0/581 cut-off events. [2021-08-12 21:46:11,371 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:11,371 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. [2021-08-12 21:46:11,371 INFO L82 GeneralOperation]: Start removeDead. Operand has 486 places, 293 transitions, 10186 flow [2021-08-12 21:46:11,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 484 places, 291 transitions, 10182 flow [2021-08-12 21:46:11,376 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:11,376 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:11,376 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:11,376 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:11,376 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:11,376 INFO L82 PathProgramCache]: Analyzing trace with hash 463395, now seen corresponding path program 1 times [2021-08-12 21:46:11,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:11,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065222883] [2021-08-12 21:46:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:11,410 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:11,410 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:11,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:11,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065222883] [2021-08-12 21:46:11,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065222883] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:11,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:11,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:11,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365663358] [2021-08-12 21:46:11,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:11,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:11,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:11,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:11,413 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 293 [2021-08-12 21:46:11,414 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) [2021-08-12 21:46:11,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:11,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 293 [2021-08-12 21:46:11,414 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:11,534 INFO L129 PetriNetUnfolder]: 0/290 cut-off events. [2021-08-12 21:46:11,534 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:11,534 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. [2021-08-12 21:46:11,535 INFO L132 encePairwiseOnDemand]: 291/293 looper letters, 0 selfloop transitions, 1 changer transitions 0/290 dead transitions. [2021-08-12 21:46:11,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 290 transitions, 10182 flow [2021-08-12 21:46:11,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:11,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2021-08-12 21:46:11,536 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9920364050056882 [2021-08-12 21:46:11,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2021-08-12 21:46:11,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2021-08-12 21:46:11,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:11,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2021-08-12 21:46:11,537 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) [2021-08-12 21:46:11,537 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) [2021-08-12 21:46:11,537 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) [2021-08-12 21:46:11,537 INFO L348 CegarLoopForPetriNet]: 484 programPoint places, 1 predicate places. [2021-08-12 21:46:11,537 INFO L482 AbstractCegarLoop]: Abstraction has has 485 places, 290 transitions, 10182 flow [2021-08-12 21:46:11,538 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) [2021-08-12 21:46:11,538 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:11,538 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] [2021-08-12 21:46:11,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-08-12 21:46:11,538 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:11,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:11,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1366519480, now seen corresponding path program 1 times [2021-08-12 21:46:11,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:11,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510437664] [2021-08-12 21:46:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:11,565 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:11,567 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:11,584 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:11,585 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:11,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2021-08-12 21:46:11,585 WARN L235 ceAbstractionStarter]: 96 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:11,585 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 97 thread instances. [2021-08-12 21:46:11,658 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:11,658 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:11,659 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:11,659 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:11,659 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:11,659 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:11,659 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:11,659 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:11,659 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:11,659 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:11,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 491 places, 296 transitions, 10389 flow [2021-08-12 21:46:11,805 INFO L129 PetriNetUnfolder]: 0/587 cut-off events. [2021-08-12 21:46:11,805 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:11,805 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. [2021-08-12 21:46:11,805 INFO L82 GeneralOperation]: Start removeDead. Operand has 491 places, 296 transitions, 10389 flow [2021-08-12 21:46:11,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 489 places, 294 transitions, 10385 flow [2021-08-12 21:46:11,809 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:11,809 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:11,809 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:11,809 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:11,809 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:11,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:11,809 INFO L82 PathProgramCache]: Analyzing trace with hash 472867, now seen corresponding path program 1 times [2021-08-12 21:46:11,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:11,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183389597] [2021-08-12 21:46:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:11,836 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:11,836 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:11,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:11,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183389597] [2021-08-12 21:46:11,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183389597] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:11,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:11,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:11,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235119160] [2021-08-12 21:46:11,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:11,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:11,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:11,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:11,840 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 296 [2021-08-12 21:46:11,840 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) [2021-08-12 21:46:11,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:11,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 296 [2021-08-12 21:46:11,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:12,068 INFO L129 PetriNetUnfolder]: 0/293 cut-off events. [2021-08-12 21:46:12,068 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:12,069 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. [2021-08-12 21:46:12,069 INFO L132 encePairwiseOnDemand]: 294/296 looper letters, 0 selfloop transitions, 1 changer transitions 0/293 dead transitions. [2021-08-12 21:46:12,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 293 transitions, 10385 flow [2021-08-12 21:46:12,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:12,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:12,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 881 transitions. [2021-08-12 21:46:12,070 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9921171171171171 [2021-08-12 21:46:12,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 881 transitions. [2021-08-12 21:46:12,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 881 transitions. [2021-08-12 21:46:12,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:12,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 881 transitions. [2021-08-12 21:46:12,072 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) [2021-08-12 21:46:12,072 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) [2021-08-12 21:46:12,072 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) [2021-08-12 21:46:12,072 INFO L348 CegarLoopForPetriNet]: 489 programPoint places, 1 predicate places. [2021-08-12 21:46:12,072 INFO L482 AbstractCegarLoop]: Abstraction has has 490 places, 293 transitions, 10385 flow [2021-08-12 21:46:12,073 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) [2021-08-12 21:46:12,073 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:12,079 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] [2021-08-12 21:46:12,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2021-08-12 21:46:12,079 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:12,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1935852969, now seen corresponding path program 1 times [2021-08-12 21:46:12,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:12,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633543129] [2021-08-12 21:46:12,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:12,118 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:12,139 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:12,173 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:12,173 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:12,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2021-08-12 21:46:12,173 WARN L235 ceAbstractionStarter]: 97 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:12,173 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 98 thread instances. [2021-08-12 21:46:12,261 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:12,261 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:12,261 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:12,261 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:12,261 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:12,262 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:12,262 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:12,262 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:12,262 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:12,262 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:12,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 496 places, 299 transitions, 10594 flow [2021-08-12 21:46:12,526 INFO L129 PetriNetUnfolder]: 0/593 cut-off events. [2021-08-12 21:46:12,526 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:12,526 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. [2021-08-12 21:46:12,526 INFO L82 GeneralOperation]: Start removeDead. Operand has 496 places, 299 transitions, 10594 flow [2021-08-12 21:46:12,530 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 494 places, 297 transitions, 10590 flow [2021-08-12 21:46:12,530 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:12,531 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:12,531 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:12,531 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:12,531 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:12,531 INFO L82 PathProgramCache]: Analyzing trace with hash 482435, now seen corresponding path program 1 times [2021-08-12 21:46:12,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:12,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599576382] [2021-08-12 21:46:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:12,565 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:12,566 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:12,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:12,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599576382] [2021-08-12 21:46:12,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599576382] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:12,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:12,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:12,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167749865] [2021-08-12 21:46:12,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:12,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:12,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:12,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:12,569 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 299 [2021-08-12 21:46:12,569 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) [2021-08-12 21:46:12,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:12,569 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 299 [2021-08-12 21:46:12,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:12,689 INFO L129 PetriNetUnfolder]: 0/296 cut-off events. [2021-08-12 21:46:12,689 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:12,689 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. [2021-08-12 21:46:12,690 INFO L132 encePairwiseOnDemand]: 297/299 looper letters, 0 selfloop transitions, 1 changer transitions 0/296 dead transitions. [2021-08-12 21:46:12,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 296 transitions, 10590 flow [2021-08-12 21:46:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:12,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 890 transitions. [2021-08-12 21:46:12,691 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.992196209587514 [2021-08-12 21:46:12,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 890 transitions. [2021-08-12 21:46:12,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 890 transitions. [2021-08-12 21:46:12,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:12,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 890 transitions. [2021-08-12 21:46:12,691 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) [2021-08-12 21:46:12,692 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) [2021-08-12 21:46:12,692 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) [2021-08-12 21:46:12,692 INFO L348 CegarLoopForPetriNet]: 494 programPoint places, 1 predicate places. [2021-08-12 21:46:12,692 INFO L482 AbstractCegarLoop]: Abstraction has has 495 places, 296 transitions, 10590 flow [2021-08-12 21:46:12,692 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) [2021-08-12 21:46:12,692 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:12,693 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] [2021-08-12 21:46:12,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2021-08-12 21:46:12,693 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:12,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1806427707, now seen corresponding path program 1 times [2021-08-12 21:46:12,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:12,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061215301] [2021-08-12 21:46:12,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:12,725 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:12,727 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:12,745 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:12,745 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:12,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2021-08-12 21:46:12,745 WARN L235 ceAbstractionStarter]: 98 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:12,745 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 99 thread instances. [2021-08-12 21:46:12,818 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:12,818 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:12,819 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:12,819 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:12,819 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:12,819 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:12,819 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:12,819 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:12,819 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:12,819 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:12,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 501 places, 302 transitions, 10801 flow [2021-08-12 21:46:12,978 INFO L129 PetriNetUnfolder]: 0/599 cut-off events. [2021-08-12 21:46:12,978 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:12,979 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. [2021-08-12 21:46:12,979 INFO L82 GeneralOperation]: Start removeDead. Operand has 501 places, 302 transitions, 10801 flow [2021-08-12 21:46:12,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 499 places, 300 transitions, 10797 flow [2021-08-12 21:46:12,983 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:12,983 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:12,983 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:12,983 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:12,983 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:12,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:12,983 INFO L82 PathProgramCache]: Analyzing trace with hash 492099, now seen corresponding path program 1 times [2021-08-12 21:46:12,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:12,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158465951] [2021-08-12 21:46:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:13,015 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:13,015 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:13,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:13,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158465951] [2021-08-12 21:46:13,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158465951] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:13,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:13,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:13,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642227824] [2021-08-12 21:46:13,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:13,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:13,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:13,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:13,018 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 302 [2021-08-12 21:46:13,019 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) [2021-08-12 21:46:13,019 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:13,019 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 302 [2021-08-12 21:46:13,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:13,144 INFO L129 PetriNetUnfolder]: 0/299 cut-off events. [2021-08-12 21:46:13,145 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:13,145 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. [2021-08-12 21:46:13,145 INFO L132 encePairwiseOnDemand]: 300/302 looper letters, 0 selfloop transitions, 1 changer transitions 0/299 dead transitions. [2021-08-12 21:46:13,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 299 transitions, 10797 flow [2021-08-12 21:46:13,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:13,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 899 transitions. [2021-08-12 21:46:13,146 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9922737306843267 [2021-08-12 21:46:13,146 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 899 transitions. [2021-08-12 21:46:13,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 899 transitions. [2021-08-12 21:46:13,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:13,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 899 transitions. [2021-08-12 21:46:13,147 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) [2021-08-12 21:46:13,148 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) [2021-08-12 21:46:13,148 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) [2021-08-12 21:46:13,148 INFO L348 CegarLoopForPetriNet]: 499 programPoint places, 1 predicate places. [2021-08-12 21:46:13,148 INFO L482 AbstractCegarLoop]: Abstraction has has 500 places, 299 transitions, 10797 flow [2021-08-12 21:46:13,148 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) [2021-08-12 21:46:13,148 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:13,148 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] [2021-08-12 21:46:13,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2021-08-12 21:46:13,149 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:13,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:13,149 INFO L82 PathProgramCache]: Analyzing trace with hash 890119905, now seen corresponding path program 1 times [2021-08-12 21:46:13,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:13,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126818743] [2021-08-12 21:46:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:13,185 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:13,187 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:13,206 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:13,207 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:13,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2021-08-12 21:46:13,207 WARN L235 ceAbstractionStarter]: 99 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:13,207 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 100 thread instances. [2021-08-12 21:46:13,285 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:13,286 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:13,286 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:13,286 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:13,287 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:13,287 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:13,287 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:13,287 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:13,287 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:13,287 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:13,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 506 places, 305 transitions, 11010 flow [2021-08-12 21:46:13,461 INFO L129 PetriNetUnfolder]: 0/605 cut-off events. [2021-08-12 21:46:13,461 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:13,461 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. [2021-08-12 21:46:13,461 INFO L82 GeneralOperation]: Start removeDead. Operand has 506 places, 305 transitions, 11010 flow [2021-08-12 21:46:13,466 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 504 places, 303 transitions, 11006 flow [2021-08-12 21:46:13,467 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:13,467 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:13,467 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:13,467 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:13,467 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:13,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:13,467 INFO L82 PathProgramCache]: Analyzing trace with hash 501859, now seen corresponding path program 1 times [2021-08-12 21:46:13,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:13,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8573797] [2021-08-12 21:46:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:13,509 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:13,510 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:13,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:13,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8573797] [2021-08-12 21:46:13,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8573797] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:13,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:13,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:13,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487205052] [2021-08-12 21:46:13,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:13,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:13,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:13,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:13,513 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 305 [2021-08-12 21:46:13,514 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) [2021-08-12 21:46:13,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:13,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 305 [2021-08-12 21:46:13,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:13,650 INFO L129 PetriNetUnfolder]: 0/302 cut-off events. [2021-08-12 21:46:13,651 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:13,651 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. [2021-08-12 21:46:13,652 INFO L132 encePairwiseOnDemand]: 303/305 looper letters, 0 selfloop transitions, 1 changer transitions 0/302 dead transitions. [2021-08-12 21:46:13,652 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 302 transitions, 11006 flow [2021-08-12 21:46:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2021-08-12 21:46:13,652 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9923497267759562 [2021-08-12 21:46:13,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2021-08-12 21:46:13,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2021-08-12 21:46:13,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:13,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2021-08-12 21:46:13,653 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) [2021-08-12 21:46:13,654 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) [2021-08-12 21:46:13,654 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) [2021-08-12 21:46:13,654 INFO L348 CegarLoopForPetriNet]: 504 programPoint places, 1 predicate places. [2021-08-12 21:46:13,654 INFO L482 AbstractCegarLoop]: Abstraction has has 505 places, 302 transitions, 11006 flow [2021-08-12 21:46:13,654 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) [2021-08-12 21:46:13,654 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:13,654 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] [2021-08-12 21:46:13,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2021-08-12 21:46:13,655 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:13,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1232130558, now seen corresponding path program 1 times [2021-08-12 21:46:13,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:13,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286418891] [2021-08-12 21:46:13,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:13,694 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:13,696 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:13,717 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:13,717 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:13,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2021-08-12 21:46:13,717 WARN L235 ceAbstractionStarter]: 100 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:13,717 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 101 thread instances. [2021-08-12 21:46:13,810 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:13,810 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:13,811 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:13,811 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:13,811 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:13,811 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:13,811 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:13,811 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:13,811 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:13,811 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:13,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 511 places, 308 transitions, 11221 flow [2021-08-12 21:46:13,977 INFO L129 PetriNetUnfolder]: 0/611 cut-off events. [2021-08-12 21:46:13,977 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:13,977 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. [2021-08-12 21:46:13,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 511 places, 308 transitions, 11221 flow [2021-08-12 21:46:13,983 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 509 places, 306 transitions, 11217 flow [2021-08-12 21:46:13,984 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:13,984 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:13,984 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:13,984 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:13,984 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:13,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:13,984 INFO L82 PathProgramCache]: Analyzing trace with hash 511715, now seen corresponding path program 1 times [2021-08-12 21:46:13,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:13,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444161979] [2021-08-12 21:46:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:14,020 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:14,020 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:14,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:14,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444161979] [2021-08-12 21:46:14,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444161979] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:14,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:14,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:14,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517360332] [2021-08-12 21:46:14,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:14,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:14,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:14,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:14,025 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 308 [2021-08-12 21:46:14,025 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) [2021-08-12 21:46:14,026 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:14,026 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 308 [2021-08-12 21:46:14,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:14,158 INFO L129 PetriNetUnfolder]: 0/305 cut-off events. [2021-08-12 21:46:14,158 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:14,158 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. [2021-08-12 21:46:14,159 INFO L132 encePairwiseOnDemand]: 306/308 looper letters, 0 selfloop transitions, 1 changer transitions 0/305 dead transitions. [2021-08-12 21:46:14,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 305 transitions, 11217 flow [2021-08-12 21:46:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:14,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 917 transitions. [2021-08-12 21:46:14,160 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9924242424242424 [2021-08-12 21:46:14,160 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 917 transitions. [2021-08-12 21:46:14,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 917 transitions. [2021-08-12 21:46:14,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:14,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 917 transitions. [2021-08-12 21:46:14,161 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) [2021-08-12 21:46:14,161 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) [2021-08-12 21:46:14,161 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) [2021-08-12 21:46:14,162 INFO L348 CegarLoopForPetriNet]: 509 programPoint places, 1 predicate places. [2021-08-12 21:46:14,162 INFO L482 AbstractCegarLoop]: Abstraction has has 510 places, 305 transitions, 11217 flow [2021-08-12 21:46:14,162 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) [2021-08-12 21:46:14,162 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:14,162 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] [2021-08-12 21:46:14,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2021-08-12 21:46:14,162 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:14,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:14,162 INFO L82 PathProgramCache]: Analyzing trace with hash 162839141, now seen corresponding path program 1 times [2021-08-12 21:46:14,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:14,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554322463] [2021-08-12 21:46:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:14,196 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:14,198 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:14,220 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:14,220 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:14,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2021-08-12 21:46:14,221 WARN L235 ceAbstractionStarter]: 101 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:14,221 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 102 thread instances. [2021-08-12 21:46:14,295 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:14,296 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:14,296 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:14,296 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:14,296 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:14,296 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:14,296 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:14,296 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:14,296 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:14,296 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:14,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 516 places, 311 transitions, 11434 flow [2021-08-12 21:46:14,466 INFO L129 PetriNetUnfolder]: 0/617 cut-off events. [2021-08-12 21:46:14,466 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:14,467 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. [2021-08-12 21:46:14,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 516 places, 311 transitions, 11434 flow [2021-08-12 21:46:14,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 514 places, 309 transitions, 11430 flow [2021-08-12 21:46:14,471 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:14,471 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:14,471 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:14,471 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:14,471 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:14,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:14,471 INFO L82 PathProgramCache]: Analyzing trace with hash 521667, now seen corresponding path program 1 times [2021-08-12 21:46:14,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:14,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197949229] [2021-08-12 21:46:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:14,505 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:14,505 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:14,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:14,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197949229] [2021-08-12 21:46:14,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197949229] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:14,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:14,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:14,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052038663] [2021-08-12 21:46:14,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:14,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:14,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:14,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:14,508 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 311 [2021-08-12 21:46:14,509 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) [2021-08-12 21:46:14,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:14,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 311 [2021-08-12 21:46:14,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:14,648 INFO L129 PetriNetUnfolder]: 0/308 cut-off events. [2021-08-12 21:46:14,649 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:14,649 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. [2021-08-12 21:46:14,649 INFO L132 encePairwiseOnDemand]: 309/311 looper letters, 0 selfloop transitions, 1 changer transitions 0/308 dead transitions. [2021-08-12 21:46:14,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 308 transitions, 11430 flow [2021-08-12 21:46:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 926 transitions. [2021-08-12 21:46:14,650 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.992497320471597 [2021-08-12 21:46:14,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 926 transitions. [2021-08-12 21:46:14,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 926 transitions. [2021-08-12 21:46:14,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:14,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 926 transitions. [2021-08-12 21:46:14,651 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) [2021-08-12 21:46:14,652 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) [2021-08-12 21:46:14,652 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) [2021-08-12 21:46:14,652 INFO L348 CegarLoopForPetriNet]: 514 programPoint places, 1 predicate places. [2021-08-12 21:46:14,652 INFO L482 AbstractCegarLoop]: Abstraction has has 515 places, 308 transitions, 11430 flow [2021-08-12 21:46:14,652 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) [2021-08-12 21:46:14,652 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:14,652 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] [2021-08-12 21:46:14,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2021-08-12 21:46:14,652 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:14,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:14,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1879511423, now seen corresponding path program 1 times [2021-08-12 21:46:14,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:14,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700886569] [2021-08-12 21:46:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:14,687 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:14,689 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:14,710 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:14,711 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:14,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2021-08-12 21:46:14,711 WARN L235 ceAbstractionStarter]: 102 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:14,711 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 103 thread instances. [2021-08-12 21:46:14,788 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:14,788 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:14,789 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:14,789 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:14,789 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:14,789 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:14,789 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:14,789 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:14,789 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:14,789 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:14,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 521 places, 314 transitions, 11649 flow [2021-08-12 21:46:15,128 INFO L129 PetriNetUnfolder]: 0/623 cut-off events. [2021-08-12 21:46:15,128 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:15,128 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. [2021-08-12 21:46:15,128 INFO L82 GeneralOperation]: Start removeDead. Operand has 521 places, 314 transitions, 11649 flow [2021-08-12 21:46:15,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 519 places, 312 transitions, 11645 flow [2021-08-12 21:46:15,133 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:15,133 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:15,133 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:15,133 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:15,133 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:15,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:15,133 INFO L82 PathProgramCache]: Analyzing trace with hash 531715, now seen corresponding path program 1 times [2021-08-12 21:46:15,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:15,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670380296] [2021-08-12 21:46:15,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:15,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:15,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:15,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:15,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670380296] [2021-08-12 21:46:15,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670380296] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:15,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:15,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:15,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825484614] [2021-08-12 21:46:15,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:15,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:15,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:15,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:15,172 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 314 [2021-08-12 21:46:15,173 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) [2021-08-12 21:46:15,173 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:15,173 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 314 [2021-08-12 21:46:15,173 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:15,339 INFO L129 PetriNetUnfolder]: 0/311 cut-off events. [2021-08-12 21:46:15,340 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:15,340 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. [2021-08-12 21:46:15,341 INFO L132 encePairwiseOnDemand]: 312/314 looper letters, 0 selfloop transitions, 1 changer transitions 0/311 dead transitions. [2021-08-12 21:46:15,341 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 311 transitions, 11645 flow [2021-08-12 21:46:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 935 transitions. [2021-08-12 21:46:15,342 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9925690021231423 [2021-08-12 21:46:15,342 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 935 transitions. [2021-08-12 21:46:15,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 935 transitions. [2021-08-12 21:46:15,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:15,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 935 transitions. [2021-08-12 21:46:15,342 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) [2021-08-12 21:46:15,343 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) [2021-08-12 21:46:15,343 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) [2021-08-12 21:46:15,343 INFO L348 CegarLoopForPetriNet]: 519 programPoint places, 1 predicate places. [2021-08-12 21:46:15,343 INFO L482 AbstractCegarLoop]: Abstraction has has 520 places, 311 transitions, 11645 flow [2021-08-12 21:46:15,343 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) [2021-08-12 21:46:15,344 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:15,344 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] [2021-08-12 21:46:15,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2021-08-12 21:46:15,344 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:15,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:15,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1613292469, now seen corresponding path program 1 times [2021-08-12 21:46:15,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:15,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506715995] [2021-08-12 21:46:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:15,377 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:15,379 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:15,400 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:15,401 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:15,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-08-12 21:46:15,401 WARN L235 ceAbstractionStarter]: 103 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:15,401 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 104 thread instances. [2021-08-12 21:46:15,486 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:15,487 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:15,487 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:15,487 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:15,487 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:15,488 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:15,488 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:15,488 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:15,488 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:15,488 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:15,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 526 places, 317 transitions, 11866 flow [2021-08-12 21:46:15,677 INFO L129 PetriNetUnfolder]: 0/629 cut-off events. [2021-08-12 21:46:15,677 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:15,677 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. [2021-08-12 21:46:15,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 526 places, 317 transitions, 11866 flow [2021-08-12 21:46:15,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 524 places, 315 transitions, 11862 flow [2021-08-12 21:46:15,682 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:15,682 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:15,682 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:15,682 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:15,682 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:15,682 INFO L82 PathProgramCache]: Analyzing trace with hash 541859, now seen corresponding path program 1 times [2021-08-12 21:46:15,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:15,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159503239] [2021-08-12 21:46:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:15,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:15,713 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:15,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:15,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159503239] [2021-08-12 21:46:15,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159503239] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:15,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:15,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:15,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147244447] [2021-08-12 21:46:15,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:15,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:15,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:15,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:15,716 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 317 [2021-08-12 21:46:15,716 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) [2021-08-12 21:46:15,717 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:15,717 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 317 [2021-08-12 21:46:15,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:15,855 INFO L129 PetriNetUnfolder]: 0/314 cut-off events. [2021-08-12 21:46:15,856 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:15,856 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. [2021-08-12 21:46:15,857 INFO L132 encePairwiseOnDemand]: 315/317 looper letters, 0 selfloop transitions, 1 changer transitions 0/314 dead transitions. [2021-08-12 21:46:15,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 314 transitions, 11862 flow [2021-08-12 21:46:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:15,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:15,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 944 transitions. [2021-08-12 21:46:15,857 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9926393270241851 [2021-08-12 21:46:15,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 944 transitions. [2021-08-12 21:46:15,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 944 transitions. [2021-08-12 21:46:15,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:15,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 944 transitions. [2021-08-12 21:46:15,858 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) [2021-08-12 21:46:15,858 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) [2021-08-12 21:46:15,859 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) [2021-08-12 21:46:15,859 INFO L348 CegarLoopForPetriNet]: 524 programPoint places, 1 predicate places. [2021-08-12 21:46:15,859 INFO L482 AbstractCegarLoop]: Abstraction has has 525 places, 314 transitions, 11862 flow [2021-08-12 21:46:15,859 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) [2021-08-12 21:46:15,859 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:15,859 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] [2021-08-12 21:46:15,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2021-08-12 21:46:15,859 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:15,859 INFO L82 PathProgramCache]: Analyzing trace with hash 235190340, now seen corresponding path program 1 times [2021-08-12 21:46:15,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:15,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897178619] [2021-08-12 21:46:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:15,891 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:15,893 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:15,914 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:15,914 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:15,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2021-08-12 21:46:15,915 WARN L235 ceAbstractionStarter]: 104 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:15,915 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 105 thread instances. [2021-08-12 21:46:15,991 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:15,992 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:15,992 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:15,992 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:15,992 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:15,992 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:15,992 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:15,992 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:15,993 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:15,993 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:15,995 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 531 places, 320 transitions, 12085 flow [2021-08-12 21:46:16,176 INFO L129 PetriNetUnfolder]: 0/635 cut-off events. [2021-08-12 21:46:16,176 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:16,176 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. [2021-08-12 21:46:16,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 531 places, 320 transitions, 12085 flow [2021-08-12 21:46:16,180 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 529 places, 318 transitions, 12081 flow [2021-08-12 21:46:16,181 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:16,181 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:16,181 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:16,181 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:16,181 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:16,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:16,181 INFO L82 PathProgramCache]: Analyzing trace with hash 552099, now seen corresponding path program 1 times [2021-08-12 21:46:16,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:16,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818104450] [2021-08-12 21:46:16,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:16,213 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:16,213 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:16,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:16,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818104450] [2021-08-12 21:46:16,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818104450] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:16,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:16,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:16,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297967145] [2021-08-12 21:46:16,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:16,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:16,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:16,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:16,217 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 320 [2021-08-12 21:46:16,217 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) [2021-08-12 21:46:16,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:16,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 320 [2021-08-12 21:46:16,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:16,363 INFO L129 PetriNetUnfolder]: 0/317 cut-off events. [2021-08-12 21:46:16,363 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:16,363 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. [2021-08-12 21:46:16,364 INFO L132 encePairwiseOnDemand]: 318/320 looper letters, 0 selfloop transitions, 1 changer transitions 0/317 dead transitions. [2021-08-12 21:46:16,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 317 transitions, 12081 flow [2021-08-12 21:46:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:16,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 953 transitions. [2021-08-12 21:46:16,365 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9927083333333333 [2021-08-12 21:46:16,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 953 transitions. [2021-08-12 21:46:16,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 953 transitions. [2021-08-12 21:46:16,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:16,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 953 transitions. [2021-08-12 21:46:16,366 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) [2021-08-12 21:46:16,366 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) [2021-08-12 21:46:16,366 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) [2021-08-12 21:46:16,366 INFO L348 CegarLoopForPetriNet]: 529 programPoint places, 1 predicate places. [2021-08-12 21:46:16,366 INFO L482 AbstractCegarLoop]: Abstraction has has 530 places, 317 transitions, 12081 flow [2021-08-12 21:46:16,367 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) [2021-08-12 21:46:16,367 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:16,367 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] [2021-08-12 21:46:16,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2021-08-12 21:46:16,367 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:16,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:16,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1706772049, now seen corresponding path program 1 times [2021-08-12 21:46:16,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:16,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206374443] [2021-08-12 21:46:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:16,398 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:16,400 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:16,422 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:16,423 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:16,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2021-08-12 21:46:16,423 WARN L235 ceAbstractionStarter]: 105 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:16,423 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 106 thread instances. [2021-08-12 21:46:16,525 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:16,525 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:16,525 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:16,525 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:16,525 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:16,525 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:16,525 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:16,525 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:16,526 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:16,526 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:16,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 536 places, 323 transitions, 12306 flow [2021-08-12 21:46:16,726 INFO L129 PetriNetUnfolder]: 0/641 cut-off events. [2021-08-12 21:46:16,727 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:16,727 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. [2021-08-12 21:46:16,727 INFO L82 GeneralOperation]: Start removeDead. Operand has 536 places, 323 transitions, 12306 flow [2021-08-12 21:46:16,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 534 places, 321 transitions, 12302 flow [2021-08-12 21:46:16,732 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:16,732 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:16,732 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:16,732 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:16,732 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:16,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:16,732 INFO L82 PathProgramCache]: Analyzing trace with hash 562435, now seen corresponding path program 1 times [2021-08-12 21:46:16,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:16,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153865073] [2021-08-12 21:46:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:16,763 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:16,763 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:16,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:16,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153865073] [2021-08-12 21:46:16,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153865073] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:16,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:16,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:16,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513293524] [2021-08-12 21:46:16,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:16,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:16,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:16,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:16,767 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 323 [2021-08-12 21:46:16,767 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) [2021-08-12 21:46:16,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:16,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 323 [2021-08-12 21:46:16,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:16,915 INFO L129 PetriNetUnfolder]: 0/320 cut-off events. [2021-08-12 21:46:16,915 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:16,915 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. [2021-08-12 21:46:16,916 INFO L132 encePairwiseOnDemand]: 321/323 looper letters, 0 selfloop transitions, 1 changer transitions 0/320 dead transitions. [2021-08-12 21:46:16,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 320 transitions, 12302 flow [2021-08-12 21:46:16,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:16,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 962 transitions. [2021-08-12 21:46:16,917 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9927760577915377 [2021-08-12 21:46:16,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 962 transitions. [2021-08-12 21:46:16,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 962 transitions. [2021-08-12 21:46:16,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:16,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 962 transitions. [2021-08-12 21:46:16,918 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) [2021-08-12 21:46:16,919 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) [2021-08-12 21:46:16,919 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) [2021-08-12 21:46:16,919 INFO L348 CegarLoopForPetriNet]: 534 programPoint places, 1 predicate places. [2021-08-12 21:46:16,919 INFO L482 AbstractCegarLoop]: Abstraction has has 535 places, 320 transitions, 12302 flow [2021-08-12 21:46:16,919 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) [2021-08-12 21:46:16,919 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:16,919 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] [2021-08-12 21:46:16,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2021-08-12 21:46:16,919 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:16,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:16,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1296985031, now seen corresponding path program 1 times [2021-08-12 21:46:16,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:16,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681778386] [2021-08-12 21:46:16,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:16,952 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:16,954 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:16,976 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:16,976 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:16,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2021-08-12 21:46:16,976 WARN L235 ceAbstractionStarter]: 106 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:16,976 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 107 thread instances. [2021-08-12 21:46:17,064 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:17,065 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:17,065 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:17,065 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:17,065 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:17,065 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:17,065 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:17,065 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:17,065 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:17,065 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:17,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 541 places, 326 transitions, 12529 flow [2021-08-12 21:46:17,257 INFO L129 PetriNetUnfolder]: 0/647 cut-off events. [2021-08-12 21:46:17,257 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:17,258 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. [2021-08-12 21:46:17,258 INFO L82 GeneralOperation]: Start removeDead. Operand has 541 places, 326 transitions, 12529 flow [2021-08-12 21:46:17,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 539 places, 324 transitions, 12525 flow [2021-08-12 21:46:17,263 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:17,263 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:17,263 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:17,263 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:17,263 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:17,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:17,263 INFO L82 PathProgramCache]: Analyzing trace with hash 572867, now seen corresponding path program 1 times [2021-08-12 21:46:17,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:17,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561528873] [2021-08-12 21:46:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:17,305 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:17,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:17,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:17,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561528873] [2021-08-12 21:46:17,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561528873] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:17,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:17,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:17,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794078915] [2021-08-12 21:46:17,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:17,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:17,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:17,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:17,308 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 326 [2021-08-12 21:46:17,308 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) [2021-08-12 21:46:17,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:17,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 326 [2021-08-12 21:46:17,308 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:17,462 INFO L129 PetriNetUnfolder]: 0/323 cut-off events. [2021-08-12 21:46:17,462 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:17,462 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. [2021-08-12 21:46:17,463 INFO L132 encePairwiseOnDemand]: 324/326 looper letters, 0 selfloop transitions, 1 changer transitions 0/323 dead transitions. [2021-08-12 21:46:17,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 323 transitions, 12525 flow [2021-08-12 21:46:17,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 971 transitions. [2021-08-12 21:46:17,464 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9928425357873211 [2021-08-12 21:46:17,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 971 transitions. [2021-08-12 21:46:17,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 971 transitions. [2021-08-12 21:46:17,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:17,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 971 transitions. [2021-08-12 21:46:17,465 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) [2021-08-12 21:46:17,465 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) [2021-08-12 21:46:17,465 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) [2021-08-12 21:46:17,465 INFO L348 CegarLoopForPetriNet]: 539 programPoint places, 1 predicate places. [2021-08-12 21:46:17,465 INFO L482 AbstractCegarLoop]: Abstraction has has 540 places, 323 transitions, 12525 flow [2021-08-12 21:46:17,465 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) [2021-08-12 21:46:17,465 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:17,466 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] [2021-08-12 21:46:17,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2021-08-12 21:46:17,466 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:17,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:17,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1043675719, now seen corresponding path program 1 times [2021-08-12 21:46:17,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:17,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893443074] [2021-08-12 21:46:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:17,498 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:17,500 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:17,523 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:17,524 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:17,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2021-08-12 21:46:17,524 WARN L235 ceAbstractionStarter]: 107 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:17,524 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 108 thread instances. [2021-08-12 21:46:17,603 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:17,604 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:17,604 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:17,604 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:17,604 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:17,604 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:17,604 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:17,604 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:17,604 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:17,604 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:17,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 546 places, 329 transitions, 12754 flow [2021-08-12 21:46:17,799 INFO L129 PetriNetUnfolder]: 0/653 cut-off events. [2021-08-12 21:46:17,800 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:17,800 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. [2021-08-12 21:46:17,800 INFO L82 GeneralOperation]: Start removeDead. Operand has 546 places, 329 transitions, 12754 flow [2021-08-12 21:46:17,804 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 544 places, 327 transitions, 12750 flow [2021-08-12 21:46:17,805 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:17,805 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:17,805 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:17,805 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:17,805 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:17,805 INFO L82 PathProgramCache]: Analyzing trace with hash 583395, now seen corresponding path program 1 times [2021-08-12 21:46:17,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:17,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533926902] [2021-08-12 21:46:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:17,973 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:17,973 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:17,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:17,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533926902] [2021-08-12 21:46:17,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533926902] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:17,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:17,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:17,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714335337] [2021-08-12 21:46:17,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:17,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:17,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:17,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:17,976 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 329 [2021-08-12 21:46:17,977 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) [2021-08-12 21:46:17,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:17,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 329 [2021-08-12 21:46:17,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:18,134 INFO L129 PetriNetUnfolder]: 0/326 cut-off events. [2021-08-12 21:46:18,134 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:18,134 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. [2021-08-12 21:46:18,135 INFO L132 encePairwiseOnDemand]: 327/329 looper letters, 0 selfloop transitions, 1 changer transitions 0/326 dead transitions. [2021-08-12 21:46:18,135 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 326 transitions, 12750 flow [2021-08-12 21:46:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2021-08-12 21:46:18,135 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9929078014184397 [2021-08-12 21:46:18,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2021-08-12 21:46:18,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2021-08-12 21:46:18,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:18,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2021-08-12 21:46:18,136 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) [2021-08-12 21:46:18,137 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) [2021-08-12 21:46:18,137 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) [2021-08-12 21:46:18,137 INFO L348 CegarLoopForPetriNet]: 544 programPoint places, 1 predicate places. [2021-08-12 21:46:18,137 INFO L482 AbstractCegarLoop]: Abstraction has has 545 places, 326 transitions, 12750 flow [2021-08-12 21:46:18,137 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) [2021-08-12 21:46:18,137 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:18,137 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] [2021-08-12 21:46:18,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2021-08-12 21:46:18,137 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:18,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:18,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1777993098, now seen corresponding path program 1 times [2021-08-12 21:46:18,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:18,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557115715] [2021-08-12 21:46:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:18,173 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:18,175 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:18,197 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:18,197 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:18,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2021-08-12 21:46:18,197 WARN L235 ceAbstractionStarter]: 108 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:18,197 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 109 thread instances. [2021-08-12 21:46:18,280 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:18,280 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:18,281 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:18,281 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:18,281 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:18,281 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:18,281 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:18,281 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:18,281 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:18,281 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:18,283 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 551 places, 332 transitions, 12981 flow [2021-08-12 21:46:18,486 INFO L129 PetriNetUnfolder]: 0/659 cut-off events. [2021-08-12 21:46:18,486 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:18,486 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. [2021-08-12 21:46:18,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 551 places, 332 transitions, 12981 flow [2021-08-12 21:46:18,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 549 places, 330 transitions, 12977 flow [2021-08-12 21:46:18,491 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:18,491 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:18,491 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:18,491 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:18,491 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:18,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:18,491 INFO L82 PathProgramCache]: Analyzing trace with hash 594019, now seen corresponding path program 1 times [2021-08-12 21:46:18,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:18,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738474136] [2021-08-12 21:46:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:18,525 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:18,525 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:18,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:18,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738474136] [2021-08-12 21:46:18,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738474136] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:18,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:18,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:18,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874023606] [2021-08-12 21:46:18,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:18,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:18,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:18,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:18,528 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 332 [2021-08-12 21:46:18,529 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) [2021-08-12 21:46:18,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:18,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 332 [2021-08-12 21:46:18,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:18,689 INFO L129 PetriNetUnfolder]: 0/329 cut-off events. [2021-08-12 21:46:18,689 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:18,689 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. [2021-08-12 21:46:18,690 INFO L132 encePairwiseOnDemand]: 330/332 looper letters, 0 selfloop transitions, 1 changer transitions 0/329 dead transitions. [2021-08-12 21:46:18,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 329 transitions, 12977 flow [2021-08-12 21:46:18,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:18,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 989 transitions. [2021-08-12 21:46:18,691 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9929718875502008 [2021-08-12 21:46:18,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 989 transitions. [2021-08-12 21:46:18,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 989 transitions. [2021-08-12 21:46:18,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:18,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 989 transitions. [2021-08-12 21:46:18,691 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) [2021-08-12 21:46:18,692 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) [2021-08-12 21:46:18,692 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) [2021-08-12 21:46:18,692 INFO L348 CegarLoopForPetriNet]: 549 programPoint places, 1 predicate places. [2021-08-12 21:46:18,692 INFO L482 AbstractCegarLoop]: Abstraction has has 550 places, 329 transitions, 12977 flow [2021-08-12 21:46:18,692 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) [2021-08-12 21:46:18,692 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:18,692 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] [2021-08-12 21:46:18,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2021-08-12 21:46:18,692 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:18,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:18,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1263830381, now seen corresponding path program 1 times [2021-08-12 21:46:18,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:18,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486774889] [2021-08-12 21:46:18,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:18,727 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:18,729 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:18,751 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:18,751 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:18,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2021-08-12 21:46:18,752 WARN L235 ceAbstractionStarter]: 109 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:18,752 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 110 thread instances. [2021-08-12 21:46:18,863 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:18,864 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:18,864 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:18,864 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:18,864 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:18,864 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:18,864 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:18,864 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:18,864 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:18,864 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:18,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 556 places, 335 transitions, 13210 flow [2021-08-12 21:46:19,072 INFO L129 PetriNetUnfolder]: 0/665 cut-off events. [2021-08-12 21:46:19,072 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:19,072 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. [2021-08-12 21:46:19,072 INFO L82 GeneralOperation]: Start removeDead. Operand has 556 places, 335 transitions, 13210 flow [2021-08-12 21:46:19,077 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 554 places, 333 transitions, 13206 flow [2021-08-12 21:46:19,077 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:19,077 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:19,077 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:19,078 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:19,078 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:19,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:19,078 INFO L82 PathProgramCache]: Analyzing trace with hash 604739, now seen corresponding path program 1 times [2021-08-12 21:46:19,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:19,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812769175] [2021-08-12 21:46:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:19,113 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:19,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:19,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:19,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812769175] [2021-08-12 21:46:19,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812769175] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:19,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:19,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:19,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38781868] [2021-08-12 21:46:19,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:19,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:19,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:19,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:19,116 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 335 [2021-08-12 21:46:19,116 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) [2021-08-12 21:46:19,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:19,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 335 [2021-08-12 21:46:19,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:19,281 INFO L129 PetriNetUnfolder]: 0/332 cut-off events. [2021-08-12 21:46:19,282 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:19,282 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. [2021-08-12 21:46:19,283 INFO L132 encePairwiseOnDemand]: 333/335 looper letters, 0 selfloop transitions, 1 changer transitions 0/332 dead transitions. [2021-08-12 21:46:19,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 332 transitions, 13206 flow [2021-08-12 21:46:19,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:19,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 998 transitions. [2021-08-12 21:46:19,284 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9930348258706467 [2021-08-12 21:46:19,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 998 transitions. [2021-08-12 21:46:19,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 998 transitions. [2021-08-12 21:46:19,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:19,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 998 transitions. [2021-08-12 21:46:19,285 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) [2021-08-12 21:46:19,285 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) [2021-08-12 21:46:19,285 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) [2021-08-12 21:46:19,285 INFO L348 CegarLoopForPetriNet]: 554 programPoint places, 1 predicate places. [2021-08-12 21:46:19,285 INFO L482 AbstractCegarLoop]: Abstraction has has 555 places, 332 transitions, 13206 flow [2021-08-12 21:46:19,286 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) [2021-08-12 21:46:19,286 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:19,286 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] [2021-08-12 21:46:19,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2021-08-12 21:46:19,286 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:19,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:19,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1341832691, now seen corresponding path program 1 times [2021-08-12 21:46:19,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:19,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044272322] [2021-08-12 21:46:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:19,329 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:19,331 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:19,357 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:19,357 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:19,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2021-08-12 21:46:19,358 WARN L235 ceAbstractionStarter]: 110 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:19,358 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 111 thread instances. [2021-08-12 21:46:19,450 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:19,451 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:19,451 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:19,451 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:19,451 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:19,451 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:19,451 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:19,451 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:19,451 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:19,451 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:19,454 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 561 places, 338 transitions, 13441 flow [2021-08-12 21:46:19,664 INFO L129 PetriNetUnfolder]: 0/671 cut-off events. [2021-08-12 21:46:19,665 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:19,665 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. [2021-08-12 21:46:19,665 INFO L82 GeneralOperation]: Start removeDead. Operand has 561 places, 338 transitions, 13441 flow [2021-08-12 21:46:19,669 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 559 places, 336 transitions, 13437 flow [2021-08-12 21:46:19,670 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:19,670 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:19,670 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:19,670 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:19,670 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:19,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:19,670 INFO L82 PathProgramCache]: Analyzing trace with hash 615555, now seen corresponding path program 1 times [2021-08-12 21:46:19,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:19,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661160667] [2021-08-12 21:46:19,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:19,710 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:19,710 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:19,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:19,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661160667] [2021-08-12 21:46:19,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661160667] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:19,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:19,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:19,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516999341] [2021-08-12 21:46:19,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:19,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:19,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:19,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:19,714 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 338 [2021-08-12 21:46:19,714 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) [2021-08-12 21:46:19,714 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:19,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 338 [2021-08-12 21:46:19,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:19,883 INFO L129 PetriNetUnfolder]: 0/335 cut-off events. [2021-08-12 21:46:19,883 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:19,883 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. [2021-08-12 21:46:19,884 INFO L132 encePairwiseOnDemand]: 336/338 looper letters, 0 selfloop transitions, 1 changer transitions 0/335 dead transitions. [2021-08-12 21:46:19,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 335 transitions, 13437 flow [2021-08-12 21:46:19,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1007 transitions. [2021-08-12 21:46:19,885 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9930966469428008 [2021-08-12 21:46:19,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1007 transitions. [2021-08-12 21:46:19,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1007 transitions. [2021-08-12 21:46:19,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:19,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1007 transitions. [2021-08-12 21:46:19,886 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) [2021-08-12 21:46:19,886 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) [2021-08-12 21:46:19,886 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) [2021-08-12 21:46:19,887 INFO L348 CegarLoopForPetriNet]: 559 programPoint places, 1 predicate places. [2021-08-12 21:46:19,887 INFO L482 AbstractCegarLoop]: Abstraction has has 560 places, 335 transitions, 13437 flow [2021-08-12 21:46:19,887 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) [2021-08-12 21:46:19,887 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:19,887 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] [2021-08-12 21:46:19,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2021-08-12 21:46:19,887 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:19,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:19,887 INFO L82 PathProgramCache]: Analyzing trace with hash 948168941, now seen corresponding path program 1 times [2021-08-12 21:46:19,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:19,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945362242] [2021-08-12 21:46:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:19,931 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:19,933 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:19,958 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:19,958 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:19,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2021-08-12 21:46:19,959 WARN L235 ceAbstractionStarter]: 111 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:19,959 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 112 thread instances. [2021-08-12 21:46:20,039 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:20,040 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:20,040 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:20,040 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:20,040 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:20,040 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:20,040 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:20,040 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:20,040 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:20,040 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:20,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 566 places, 341 transitions, 13674 flow [2021-08-12 21:46:20,503 INFO L129 PetriNetUnfolder]: 0/677 cut-off events. [2021-08-12 21:46:20,504 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:20,504 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. [2021-08-12 21:46:20,504 INFO L82 GeneralOperation]: Start removeDead. Operand has 566 places, 341 transitions, 13674 flow [2021-08-12 21:46:20,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 564 places, 339 transitions, 13670 flow [2021-08-12 21:46:20,509 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:20,510 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:20,510 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:20,510 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:20,510 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:20,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:20,510 INFO L82 PathProgramCache]: Analyzing trace with hash 626467, now seen corresponding path program 1 times [2021-08-12 21:46:20,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:20,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389896974] [2021-08-12 21:46:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:20,558 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:20,558 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:20,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:20,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389896974] [2021-08-12 21:46:20,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389896974] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:20,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:20,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:20,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226420730] [2021-08-12 21:46:20,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:20,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:20,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:20,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:20,562 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 341 [2021-08-12 21:46:20,563 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) [2021-08-12 21:46:20,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:20,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 341 [2021-08-12 21:46:20,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:20,865 INFO L129 PetriNetUnfolder]: 0/338 cut-off events. [2021-08-12 21:46:20,865 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:20,865 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. [2021-08-12 21:46:20,866 INFO L132 encePairwiseOnDemand]: 339/341 looper letters, 0 selfloop transitions, 1 changer transitions 0/338 dead transitions. [2021-08-12 21:46:20,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 338 transitions, 13670 flow [2021-08-12 21:46:20,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2021-08-12 21:46:20,867 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9931573802541545 [2021-08-12 21:46:20,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2021-08-12 21:46:20,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2021-08-12 21:46:20,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:20,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2021-08-12 21:46:20,868 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) [2021-08-12 21:46:20,868 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) [2021-08-12 21:46:20,868 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) [2021-08-12 21:46:20,868 INFO L348 CegarLoopForPetriNet]: 564 programPoint places, 1 predicate places. [2021-08-12 21:46:20,869 INFO L482 AbstractCegarLoop]: Abstraction has has 565 places, 338 transitions, 13670 flow [2021-08-12 21:46:20,869 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) [2021-08-12 21:46:20,869 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:20,869 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] [2021-08-12 21:46:20,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2021-08-12 21:46:20,869 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:20,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:20,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2125962704, now seen corresponding path program 1 times [2021-08-12 21:46:20,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:20,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280552457] [2021-08-12 21:46:20,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:20,912 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:20,914 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:20,942 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:20,942 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:20,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2021-08-12 21:46:20,942 WARN L235 ceAbstractionStarter]: 112 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:20,942 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 113 thread instances. [2021-08-12 21:46:21,033 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:21,033 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:21,034 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:21,034 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:21,034 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:21,034 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:21,034 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:21,034 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:21,034 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:21,034 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:21,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 571 places, 344 transitions, 13909 flow [2021-08-12 21:46:21,297 INFO L129 PetriNetUnfolder]: 0/683 cut-off events. [2021-08-12 21:46:21,297 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:21,297 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. [2021-08-12 21:46:21,297 INFO L82 GeneralOperation]: Start removeDead. Operand has 571 places, 344 transitions, 13909 flow [2021-08-12 21:46:21,302 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 569 places, 342 transitions, 13905 flow [2021-08-12 21:46:21,303 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:21,303 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:21,303 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:21,303 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:21,303 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:21,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash 637475, now seen corresponding path program 1 times [2021-08-12 21:46:21,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:21,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777062059] [2021-08-12 21:46:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:21,342 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:21,342 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:21,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:21,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777062059] [2021-08-12 21:46:21,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777062059] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:21,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:21,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:21,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414887823] [2021-08-12 21:46:21,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:21,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:21,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:21,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:21,345 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 344 [2021-08-12 21:46:21,345 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) [2021-08-12 21:46:21,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:21,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 344 [2021-08-12 21:46:21,345 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:21,522 INFO L129 PetriNetUnfolder]: 0/341 cut-off events. [2021-08-12 21:46:21,523 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:21,523 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. [2021-08-12 21:46:21,524 INFO L132 encePairwiseOnDemand]: 342/344 looper letters, 0 selfloop transitions, 1 changer transitions 0/341 dead transitions. [2021-08-12 21:46:21,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 341 transitions, 13905 flow [2021-08-12 21:46:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:21,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:21,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1025 transitions. [2021-08-12 21:46:21,525 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9932170542635659 [2021-08-12 21:46:21,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1025 transitions. [2021-08-12 21:46:21,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1025 transitions. [2021-08-12 21:46:21,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:21,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1025 transitions. [2021-08-12 21:46:21,526 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) [2021-08-12 21:46:21,526 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) [2021-08-12 21:46:21,526 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) [2021-08-12 21:46:21,526 INFO L348 CegarLoopForPetriNet]: 569 programPoint places, 1 predicate places. [2021-08-12 21:46:21,526 INFO L482 AbstractCegarLoop]: Abstraction has has 570 places, 341 transitions, 13905 flow [2021-08-12 21:46:21,527 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) [2021-08-12 21:46:21,527 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:21,527 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] [2021-08-12 21:46:21,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2021-08-12 21:46:21,527 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:21,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1212322745, now seen corresponding path program 1 times [2021-08-12 21:46:21,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:21,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358170046] [2021-08-12 21:46:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:21,563 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:21,565 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:21,592 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:21,592 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:21,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-08-12 21:46:21,592 WARN L235 ceAbstractionStarter]: 113 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:21,592 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 114 thread instances. [2021-08-12 21:46:21,677 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:21,678 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:21,678 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:21,678 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:21,678 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:21,678 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:21,678 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:21,678 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:21,678 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:21,678 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:21,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 576 places, 347 transitions, 14146 flow [2021-08-12 21:46:21,909 INFO L129 PetriNetUnfolder]: 0/689 cut-off events. [2021-08-12 21:46:21,909 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:21,909 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. [2021-08-12 21:46:21,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 576 places, 347 transitions, 14146 flow [2021-08-12 21:46:21,914 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 574 places, 345 transitions, 14142 flow [2021-08-12 21:46:21,915 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:21,915 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:21,915 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:21,915 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:21,915 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:21,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:21,915 INFO L82 PathProgramCache]: Analyzing trace with hash 648579, now seen corresponding path program 1 times [2021-08-12 21:46:21,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:21,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280892962] [2021-08-12 21:46:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:21,952 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:21,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:21,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:21,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280892962] [2021-08-12 21:46:21,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280892962] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:21,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:21,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:21,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135723880] [2021-08-12 21:46:21,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:21,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:21,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:21,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:21,955 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 347 [2021-08-12 21:46:21,956 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) [2021-08-12 21:46:21,956 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:21,956 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 347 [2021-08-12 21:46:21,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:22,139 INFO L129 PetriNetUnfolder]: 0/344 cut-off events. [2021-08-12 21:46:22,140 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:22,140 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. [2021-08-12 21:46:22,141 INFO L132 encePairwiseOnDemand]: 345/347 looper letters, 0 selfloop transitions, 1 changer transitions 0/344 dead transitions. [2021-08-12 21:46:22,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 344 transitions, 14142 flow [2021-08-12 21:46:22,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:22,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1034 transitions. [2021-08-12 21:46:22,141 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9932756964457252 [2021-08-12 21:46:22,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1034 transitions. [2021-08-12 21:46:22,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1034 transitions. [2021-08-12 21:46:22,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:22,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1034 transitions. [2021-08-12 21:46:22,142 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) [2021-08-12 21:46:22,143 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) [2021-08-12 21:46:22,143 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) [2021-08-12 21:46:22,143 INFO L348 CegarLoopForPetriNet]: 574 programPoint places, 1 predicate places. [2021-08-12 21:46:22,143 INFO L482 AbstractCegarLoop]: Abstraction has has 575 places, 344 transitions, 14142 flow [2021-08-12 21:46:22,143 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) [2021-08-12 21:46:22,143 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:22,143 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] [2021-08-12 21:46:22,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2021-08-12 21:46:22,143 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:22,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:22,143 INFO L82 PathProgramCache]: Analyzing trace with hash -233679533, now seen corresponding path program 1 times [2021-08-12 21:46:22,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:22,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644722158] [2021-08-12 21:46:22,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:22,182 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:22,184 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:22,212 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:22,212 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:22,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2021-08-12 21:46:22,213 WARN L235 ceAbstractionStarter]: 114 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:22,213 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 115 thread instances. [2021-08-12 21:46:22,295 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:22,296 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:22,296 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:22,296 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:22,296 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:22,296 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:22,296 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:22,296 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:22,296 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:22,297 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:22,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 581 places, 350 transitions, 14385 flow [2021-08-12 21:46:22,525 INFO L129 PetriNetUnfolder]: 0/695 cut-off events. [2021-08-12 21:46:22,525 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:22,525 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. [2021-08-12 21:46:22,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 581 places, 350 transitions, 14385 flow [2021-08-12 21:46:22,530 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 579 places, 348 transitions, 14381 flow [2021-08-12 21:46:22,531 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:22,531 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:22,531 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:22,531 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:22,531 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:22,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:22,531 INFO L82 PathProgramCache]: Analyzing trace with hash 659779, now seen corresponding path program 1 times [2021-08-12 21:46:22,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:22,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011350460] [2021-08-12 21:46:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:22,569 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:22,569 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:22,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:22,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011350460] [2021-08-12 21:46:22,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011350460] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:22,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:22,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:22,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764667102] [2021-08-12 21:46:22,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:22,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:22,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:22,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:22,572 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 350 [2021-08-12 21:46:22,572 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) [2021-08-12 21:46:22,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:22,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 350 [2021-08-12 21:46:22,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:22,992 INFO L129 PetriNetUnfolder]: 0/347 cut-off events. [2021-08-12 21:46:22,992 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:22,992 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. [2021-08-12 21:46:22,993 INFO L132 encePairwiseOnDemand]: 348/350 looper letters, 0 selfloop transitions, 1 changer transitions 0/347 dead transitions. [2021-08-12 21:46:22,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 347 transitions, 14381 flow [2021-08-12 21:46:22,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:22,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1043 transitions. [2021-08-12 21:46:22,994 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9933333333333333 [2021-08-12 21:46:22,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1043 transitions. [2021-08-12 21:46:22,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1043 transitions. [2021-08-12 21:46:22,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:22,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1043 transitions. [2021-08-12 21:46:22,995 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) [2021-08-12 21:46:22,996 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) [2021-08-12 21:46:22,996 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) [2021-08-12 21:46:22,996 INFO L348 CegarLoopForPetriNet]: 579 programPoint places, 1 predicate places. [2021-08-12 21:46:22,996 INFO L482 AbstractCegarLoop]: Abstraction has has 580 places, 347 transitions, 14381 flow [2021-08-12 21:46:22,996 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) [2021-08-12 21:46:22,996 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:22,996 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] [2021-08-12 21:46:22,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2021-08-12 21:46:22,996 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:22,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:22,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1707632977, now seen corresponding path program 1 times [2021-08-12 21:46:22,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:22,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010141736] [2021-08-12 21:46:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:23,033 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:23,035 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:23,063 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:23,063 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:23,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2021-08-12 21:46:23,063 WARN L235 ceAbstractionStarter]: 115 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:23,063 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 116 thread instances. [2021-08-12 21:46:23,195 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:23,195 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:23,196 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:23,196 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:23,196 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:23,196 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:23,196 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:23,196 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:23,196 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:23,196 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:23,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 586 places, 353 transitions, 14626 flow [2021-08-12 21:46:23,579 INFO L129 PetriNetUnfolder]: 0/701 cut-off events. [2021-08-12 21:46:23,580 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:23,580 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. [2021-08-12 21:46:23,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 586 places, 353 transitions, 14626 flow [2021-08-12 21:46:23,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 584 places, 351 transitions, 14622 flow [2021-08-12 21:46:23,585 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:23,585 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:23,585 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:23,585 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:23,585 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:23,586 INFO L82 PathProgramCache]: Analyzing trace with hash 671075, now seen corresponding path program 1 times [2021-08-12 21:46:23,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:23,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704037641] [2021-08-12 21:46:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:23,618 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:23,618 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:23,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:23,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704037641] [2021-08-12 21:46:23,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704037641] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:23,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:23,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:23,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654487143] [2021-08-12 21:46:23,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:23,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:23,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:23,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:23,621 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 350 out of 353 [2021-08-12 21:46:23,621 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) [2021-08-12 21:46:23,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:23,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 350 of 353 [2021-08-12 21:46:23,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:23,918 INFO L129 PetriNetUnfolder]: 0/350 cut-off events. [2021-08-12 21:46:23,918 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:23,918 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. [2021-08-12 21:46:23,919 INFO L132 encePairwiseOnDemand]: 351/353 looper letters, 0 selfloop transitions, 1 changer transitions 0/350 dead transitions. [2021-08-12 21:46:23,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 350 transitions, 14622 flow [2021-08-12 21:46:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:23,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2021-08-12 21:46:23,919 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9933899905571294 [2021-08-12 21:46:23,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2021-08-12 21:46:23,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2021-08-12 21:46:23,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:23,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2021-08-12 21:46:23,920 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) [2021-08-12 21:46:23,937 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) [2021-08-12 21:46:23,937 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) [2021-08-12 21:46:23,937 INFO L348 CegarLoopForPetriNet]: 584 programPoint places, 1 predicate places. [2021-08-12 21:46:23,937 INFO L482 AbstractCegarLoop]: Abstraction has has 585 places, 350 transitions, 14622 flow [2021-08-12 21:46:23,937 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) [2021-08-12 21:46:23,937 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:23,937 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] [2021-08-12 21:46:23,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2021-08-12 21:46:23,937 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:23,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:23,938 INFO L82 PathProgramCache]: Analyzing trace with hash -767531754, now seen corresponding path program 1 times [2021-08-12 21:46:23,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:23,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778433764] [2021-08-12 21:46:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:23,974 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:23,977 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:24,032 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:24,033 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:24,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2021-08-12 21:46:24,033 WARN L235 ceAbstractionStarter]: 116 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:24,033 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 117 thread instances. [2021-08-12 21:46:24,129 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:24,129 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:24,130 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:24,130 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:24,130 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:24,130 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:24,130 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:24,130 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:24,130 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:24,130 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:24,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 591 places, 356 transitions, 14869 flow [2021-08-12 21:46:24,511 INFO L129 PetriNetUnfolder]: 0/707 cut-off events. [2021-08-12 21:46:24,511 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:24,511 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. [2021-08-12 21:46:24,511 INFO L82 GeneralOperation]: Start removeDead. Operand has 591 places, 356 transitions, 14869 flow [2021-08-12 21:46:24,516 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 589 places, 354 transitions, 14865 flow [2021-08-12 21:46:24,516 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:24,516 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:24,516 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:24,516 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:24,517 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:24,517 INFO L82 PathProgramCache]: Analyzing trace with hash 682467, now seen corresponding path program 1 times [2021-08-12 21:46:24,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:24,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253273338] [2021-08-12 21:46:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:24,685 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:24,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:24,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:24,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253273338] [2021-08-12 21:46:24,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253273338] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:24,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:24,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:24,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461274998] [2021-08-12 21:46:24,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:24,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:24,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:24,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:24,688 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 353 out of 356 [2021-08-12 21:46:24,689 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) [2021-08-12 21:46:24,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:24,689 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 353 of 356 [2021-08-12 21:46:24,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:25,043 INFO L129 PetriNetUnfolder]: 0/353 cut-off events. [2021-08-12 21:46:25,044 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:25,044 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. [2021-08-12 21:46:25,045 INFO L132 encePairwiseOnDemand]: 354/356 looper letters, 0 selfloop transitions, 1 changer transitions 0/353 dead transitions. [2021-08-12 21:46:25,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 353 transitions, 14865 flow [2021-08-12 21:46:25,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:25,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1061 transitions. [2021-08-12 21:46:25,046 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9934456928838952 [2021-08-12 21:46:25,046 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1061 transitions. [2021-08-12 21:46:25,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1061 transitions. [2021-08-12 21:46:25,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:25,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1061 transitions. [2021-08-12 21:46:25,046 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) [2021-08-12 21:46:25,047 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) [2021-08-12 21:46:25,047 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) [2021-08-12 21:46:25,047 INFO L348 CegarLoopForPetriNet]: 589 programPoint places, 1 predicate places. [2021-08-12 21:46:25,047 INFO L482 AbstractCegarLoop]: Abstraction has has 590 places, 353 transitions, 14865 flow [2021-08-12 21:46:25,047 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) [2021-08-12 21:46:25,047 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:25,048 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] [2021-08-12 21:46:25,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2021-08-12 21:46:25,048 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:25,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1177259317, now seen corresponding path program 1 times [2021-08-12 21:46:25,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:25,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809506186] [2021-08-12 21:46:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:25,097 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:25,115 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:25,170 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:25,170 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:25,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2021-08-12 21:46:25,171 WARN L235 ceAbstractionStarter]: 117 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:25,171 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 118 thread instances. [2021-08-12 21:46:25,277 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:25,277 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:25,278 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:25,278 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:25,278 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:25,278 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:25,278 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:25,278 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:25,278 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:25,278 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:25,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 596 places, 359 transitions, 15114 flow [2021-08-12 21:46:25,619 INFO L129 PetriNetUnfolder]: 0/713 cut-off events. [2021-08-12 21:46:25,620 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:25,620 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. [2021-08-12 21:46:25,620 INFO L82 GeneralOperation]: Start removeDead. Operand has 596 places, 359 transitions, 15114 flow [2021-08-12 21:46:25,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 594 places, 357 transitions, 15110 flow [2021-08-12 21:46:25,625 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:25,625 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:25,625 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:25,625 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:25,625 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:25,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:25,626 INFO L82 PathProgramCache]: Analyzing trace with hash 693955, now seen corresponding path program 1 times [2021-08-12 21:46:25,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:25,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809598766] [2021-08-12 21:46:25,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:25,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:25,658 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:25,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:25,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809598766] [2021-08-12 21:46:25,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809598766] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:25,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:25,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:25,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238184198] [2021-08-12 21:46:25,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:25,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:25,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:25,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:25,661 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 356 out of 359 [2021-08-12 21:46:25,661 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) [2021-08-12 21:46:25,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:25,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 356 of 359 [2021-08-12 21:46:25,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:25,933 INFO L129 PetriNetUnfolder]: 0/356 cut-off events. [2021-08-12 21:46:25,933 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:25,933 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. [2021-08-12 21:46:25,934 INFO L132 encePairwiseOnDemand]: 357/359 looper letters, 0 selfloop transitions, 1 changer transitions 0/356 dead transitions. [2021-08-12 21:46:25,934 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 356 transitions, 15110 flow [2021-08-12 21:46:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1070 transitions. [2021-08-12 21:46:25,935 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9935004642525533 [2021-08-12 21:46:25,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1070 transitions. [2021-08-12 21:46:25,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1070 transitions. [2021-08-12 21:46:25,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:25,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1070 transitions. [2021-08-12 21:46:25,936 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) [2021-08-12 21:46:25,936 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) [2021-08-12 21:46:25,936 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) [2021-08-12 21:46:25,936 INFO L348 CegarLoopForPetriNet]: 594 programPoint places, 1 predicate places. [2021-08-12 21:46:25,936 INFO L482 AbstractCegarLoop]: Abstraction has has 595 places, 356 transitions, 15110 flow [2021-08-12 21:46:25,937 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) [2021-08-12 21:46:25,937 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:25,937 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] [2021-08-12 21:46:25,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2021-08-12 21:46:25,937 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1225165209, now seen corresponding path program 1 times [2021-08-12 21:46:25,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:25,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715585767] [2021-08-12 21:46:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:25,970 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:25,972 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:26,032 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:26,033 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:26,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2021-08-12 21:46:26,033 WARN L235 ceAbstractionStarter]: 118 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:26,033 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 119 thread instances. [2021-08-12 21:46:26,226 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:26,227 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:26,227 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:26,227 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:26,227 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:26,227 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:26,227 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:26,227 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:26,227 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:26,227 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:26,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 601 places, 362 transitions, 15361 flow [2021-08-12 21:46:26,484 INFO L129 PetriNetUnfolder]: 0/719 cut-off events. [2021-08-12 21:46:26,485 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:26,485 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. [2021-08-12 21:46:26,485 INFO L82 GeneralOperation]: Start removeDead. Operand has 601 places, 362 transitions, 15361 flow [2021-08-12 21:46:26,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 599 places, 360 transitions, 15357 flow [2021-08-12 21:46:26,490 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:26,490 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:26,490 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:26,491 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:26,491 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:26,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:26,491 INFO L82 PathProgramCache]: Analyzing trace with hash 705539, now seen corresponding path program 1 times [2021-08-12 21:46:26,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:26,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6355639] [2021-08-12 21:46:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:26,578 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:26,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:26,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:26,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6355639] [2021-08-12 21:46:26,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6355639] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:26,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:26,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:26,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877225556] [2021-08-12 21:46:26,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:26,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:26,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:26,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:26,582 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 362 [2021-08-12 21:46:26,582 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) [2021-08-12 21:46:26,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:26,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 362 [2021-08-12 21:46:26,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:26,813 INFO L129 PetriNetUnfolder]: 0/359 cut-off events. [2021-08-12 21:46:26,813 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:26,813 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. [2021-08-12 21:46:26,814 INFO L132 encePairwiseOnDemand]: 360/362 looper letters, 0 selfloop transitions, 1 changer transitions 0/359 dead transitions. [2021-08-12 21:46:26,814 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 359 transitions, 15357 flow [2021-08-12 21:46:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1079 transitions. [2021-08-12 21:46:26,815 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9935543278084714 [2021-08-12 21:46:26,815 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1079 transitions. [2021-08-12 21:46:26,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1079 transitions. [2021-08-12 21:46:26,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:26,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1079 transitions. [2021-08-12 21:46:26,816 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) [2021-08-12 21:46:26,817 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) [2021-08-12 21:46:26,817 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) [2021-08-12 21:46:26,817 INFO L348 CegarLoopForPetriNet]: 599 programPoint places, 1 predicate places. [2021-08-12 21:46:26,817 INFO L482 AbstractCegarLoop]: Abstraction has has 600 places, 359 transitions, 15357 flow [2021-08-12 21:46:26,817 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) [2021-08-12 21:46:26,817 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:26,817 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] [2021-08-12 21:46:26,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2021-08-12 21:46:26,818 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:26,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:26,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2146460389, now seen corresponding path program 1 times [2021-08-12 21:46:26,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:26,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115556380] [2021-08-12 21:46:26,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:26,856 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:26,858 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:26,887 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:26,887 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:26,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2021-08-12 21:46:26,888 WARN L235 ceAbstractionStarter]: 119 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:26,888 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 120 thread instances. [2021-08-12 21:46:26,985 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:26,985 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:26,986 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:26,986 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:26,986 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:26,986 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:26,986 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:26,986 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:26,986 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:26,986 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:26,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 606 places, 365 transitions, 15610 flow [2021-08-12 21:46:27,259 INFO L129 PetriNetUnfolder]: 0/725 cut-off events. [2021-08-12 21:46:27,260 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:27,260 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. [2021-08-12 21:46:27,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 606 places, 365 transitions, 15610 flow [2021-08-12 21:46:27,265 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 604 places, 363 transitions, 15606 flow [2021-08-12 21:46:27,266 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:27,266 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:27,266 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:27,266 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:27,266 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:27,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:27,266 INFO L82 PathProgramCache]: Analyzing trace with hash 717219, now seen corresponding path program 1 times [2021-08-12 21:46:27,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:27,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485890207] [2021-08-12 21:46:27,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:27,301 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:27,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:27,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:27,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485890207] [2021-08-12 21:46:27,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485890207] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:27,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:27,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:27,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81759229] [2021-08-12 21:46:27,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:27,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:27,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:27,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:27,304 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 365 [2021-08-12 21:46:27,305 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) [2021-08-12 21:46:27,305 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:27,305 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 365 [2021-08-12 21:46:27,305 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:27,574 INFO L129 PetriNetUnfolder]: 0/362 cut-off events. [2021-08-12 21:46:27,574 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:27,574 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. [2021-08-12 21:46:27,575 INFO L132 encePairwiseOnDemand]: 363/365 looper letters, 0 selfloop transitions, 1 changer transitions 0/362 dead transitions. [2021-08-12 21:46:27,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 362 transitions, 15606 flow [2021-08-12 21:46:27,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1088 transitions. [2021-08-12 21:46:27,576 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.993607305936073 [2021-08-12 21:46:27,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1088 transitions. [2021-08-12 21:46:27,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1088 transitions. [2021-08-12 21:46:27,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:27,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1088 transitions. [2021-08-12 21:46:27,577 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) [2021-08-12 21:46:27,577 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) [2021-08-12 21:46:27,577 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) [2021-08-12 21:46:27,577 INFO L348 CegarLoopForPetriNet]: 604 programPoint places, 1 predicate places. [2021-08-12 21:46:27,577 INFO L482 AbstractCegarLoop]: Abstraction has has 605 places, 362 transitions, 15606 flow [2021-08-12 21:46:27,577 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) [2021-08-12 21:46:27,577 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:27,578 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] [2021-08-12 21:46:27,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2021-08-12 21:46:27,578 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:27,578 INFO L82 PathProgramCache]: Analyzing trace with hash -583844004, now seen corresponding path program 1 times [2021-08-12 21:46:27,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:27,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190267259] [2021-08-12 21:46:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:27,611 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:27,613 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:27,641 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:27,641 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:27,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2021-08-12 21:46:27,642 WARN L235 ceAbstractionStarter]: 120 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:27,642 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 121 thread instances. [2021-08-12 21:46:27,739 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:27,739 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:27,740 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:27,740 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:27,740 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:27,740 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:27,740 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:27,740 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:27,740 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:27,740 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:27,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 611 places, 368 transitions, 15861 flow [2021-08-12 21:46:28,053 INFO L129 PetriNetUnfolder]: 0/731 cut-off events. [2021-08-12 21:46:28,053 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:28,053 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. [2021-08-12 21:46:28,054 INFO L82 GeneralOperation]: Start removeDead. Operand has 611 places, 368 transitions, 15861 flow [2021-08-12 21:46:28,058 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 609 places, 366 transitions, 15857 flow [2021-08-12 21:46:28,059 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:28,059 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:28,059 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:28,059 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:28,059 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:28,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:28,059 INFO L82 PathProgramCache]: Analyzing trace with hash 728995, now seen corresponding path program 1 times [2021-08-12 21:46:28,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:28,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187925951] [2021-08-12 21:46:28,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:28,094 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:28,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:28,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:28,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187925951] [2021-08-12 21:46:28,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187925951] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:28,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:28,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:28,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759999361] [2021-08-12 21:46:28,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:28,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:28,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:28,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:28,097 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 368 [2021-08-12 21:46:28,097 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) [2021-08-12 21:46:28,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:28,097 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 368 [2021-08-12 21:46:28,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:28,453 INFO L129 PetriNetUnfolder]: 0/365 cut-off events. [2021-08-12 21:46:28,454 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:28,454 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. [2021-08-12 21:46:28,455 INFO L132 encePairwiseOnDemand]: 366/368 looper letters, 0 selfloop transitions, 1 changer transitions 0/365 dead transitions. [2021-08-12 21:46:28,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 365 transitions, 15857 flow [2021-08-12 21:46:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:28,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1097 transitions. [2021-08-12 21:46:28,456 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9936594202898551 [2021-08-12 21:46:28,456 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1097 transitions. [2021-08-12 21:46:28,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1097 transitions. [2021-08-12 21:46:28,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:28,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1097 transitions. [2021-08-12 21:46:28,457 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) [2021-08-12 21:46:28,457 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) [2021-08-12 21:46:28,457 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) [2021-08-12 21:46:28,457 INFO L348 CegarLoopForPetriNet]: 609 programPoint places, 1 predicate places. [2021-08-12 21:46:28,458 INFO L482 AbstractCegarLoop]: Abstraction has has 610 places, 365 transitions, 15857 flow [2021-08-12 21:46:28,458 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) [2021-08-12 21:46:28,458 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:28,458 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] [2021-08-12 21:46:28,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2021-08-12 21:46:28,458 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:28,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:28,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1667658271, now seen corresponding path program 1 times [2021-08-12 21:46:28,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:28,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777714535] [2021-08-12 21:46:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:28,493 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:28,495 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:28,524 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:28,524 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:28,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2021-08-12 21:46:28,524 WARN L235 ceAbstractionStarter]: 121 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:28,525 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 122 thread instances. [2021-08-12 21:46:28,615 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:28,615 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:28,615 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:28,615 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:28,615 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:28,615 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:28,615 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:28,615 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:28,616 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:28,616 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:28,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 616 places, 371 transitions, 16114 flow [2021-08-12 21:46:29,079 INFO L129 PetriNetUnfolder]: 0/737 cut-off events. [2021-08-12 21:46:29,079 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:29,080 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. [2021-08-12 21:46:29,080 INFO L82 GeneralOperation]: Start removeDead. Operand has 616 places, 371 transitions, 16114 flow [2021-08-12 21:46:29,085 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 614 places, 369 transitions, 16110 flow [2021-08-12 21:46:29,085 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:29,085 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:29,085 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:29,086 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:29,086 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:29,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:29,086 INFO L82 PathProgramCache]: Analyzing trace with hash 740867, now seen corresponding path program 1 times [2021-08-12 21:46:29,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:29,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729881761] [2021-08-12 21:46:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:29,125 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:29,125 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:29,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:29,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729881761] [2021-08-12 21:46:29,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729881761] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:29,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:29,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:29,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522740667] [2021-08-12 21:46:29,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:29,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:29,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:29,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:29,129 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 368 out of 371 [2021-08-12 21:46:29,129 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) [2021-08-12 21:46:29,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:29,129 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 368 of 371 [2021-08-12 21:46:29,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:29,595 INFO L129 PetriNetUnfolder]: 0/368 cut-off events. [2021-08-12 21:46:29,596 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:29,596 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. [2021-08-12 21:46:29,596 INFO L132 encePairwiseOnDemand]: 369/371 looper letters, 0 selfloop transitions, 1 changer transitions 0/368 dead transitions. [2021-08-12 21:46:29,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 368 transitions, 16110 flow [2021-08-12 21:46:29,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1106 transitions. [2021-08-12 21:46:29,597 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9937106918238994 [2021-08-12 21:46:29,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1106 transitions. [2021-08-12 21:46:29,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1106 transitions. [2021-08-12 21:46:29,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:29,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1106 transitions. [2021-08-12 21:46:29,598 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) [2021-08-12 21:46:29,598 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) [2021-08-12 21:46:29,598 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) [2021-08-12 21:46:29,598 INFO L348 CegarLoopForPetriNet]: 614 programPoint places, 1 predicate places. [2021-08-12 21:46:29,599 INFO L482 AbstractCegarLoop]: Abstraction has has 615 places, 368 transitions, 16110 flow [2021-08-12 21:46:29,599 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) [2021-08-12 21:46:29,599 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:29,599 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] [2021-08-12 21:46:29,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2021-08-12 21:46:29,599 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:29,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:29,599 INFO L82 PathProgramCache]: Analyzing trace with hash 873382623, now seen corresponding path program 1 times [2021-08-12 21:46:29,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:29,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353384866] [2021-08-12 21:46:29,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:29,635 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:29,637 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:29,666 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:29,666 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:29,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2021-08-12 21:46:29,666 WARN L235 ceAbstractionStarter]: 122 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:29,666 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 123 thread instances. [2021-08-12 21:46:29,758 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:29,758 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:29,758 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:29,758 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:29,758 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:29,758 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:29,758 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:29,758 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:29,758 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:29,758 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:29,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 621 places, 374 transitions, 16369 flow [2021-08-12 21:46:30,233 INFO L129 PetriNetUnfolder]: 0/743 cut-off events. [2021-08-12 21:46:30,233 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:30,233 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. [2021-08-12 21:46:30,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 621 places, 374 transitions, 16369 flow [2021-08-12 21:46:30,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 619 places, 372 transitions, 16365 flow [2021-08-12 21:46:30,239 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:30,239 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:30,239 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:30,239 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:30,239 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:30,239 INFO L82 PathProgramCache]: Analyzing trace with hash 752835, now seen corresponding path program 1 times [2021-08-12 21:46:30,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:30,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283545058] [2021-08-12 21:46:30,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:30,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:30,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:30,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:30,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283545058] [2021-08-12 21:46:30,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283545058] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:30,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:30,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:30,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62724671] [2021-08-12 21:46:30,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:30,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:30,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:30,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:30,278 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 371 out of 374 [2021-08-12 21:46:30,278 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) [2021-08-12 21:46:30,278 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:30,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 371 of 374 [2021-08-12 21:46:30,278 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:30,686 INFO L129 PetriNetUnfolder]: 0/371 cut-off events. [2021-08-12 21:46:30,686 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:30,686 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. [2021-08-12 21:46:30,687 INFO L132 encePairwiseOnDemand]: 372/374 looper letters, 0 selfloop transitions, 1 changer transitions 0/371 dead transitions. [2021-08-12 21:46:30,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 371 transitions, 16365 flow [2021-08-12 21:46:30,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1115 transitions. [2021-08-12 21:46:30,688 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9937611408199644 [2021-08-12 21:46:30,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1115 transitions. [2021-08-12 21:46:30,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1115 transitions. [2021-08-12 21:46:30,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:30,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1115 transitions. [2021-08-12 21:46:30,689 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) [2021-08-12 21:46:30,689 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) [2021-08-12 21:46:30,689 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) [2021-08-12 21:46:30,690 INFO L348 CegarLoopForPetriNet]: 619 programPoint places, 1 predicate places. [2021-08-12 21:46:30,690 INFO L482 AbstractCegarLoop]: Abstraction has has 620 places, 371 transitions, 16365 flow [2021-08-12 21:46:30,690 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) [2021-08-12 21:46:30,690 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:30,690 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] [2021-08-12 21:46:30,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2021-08-12 21:46:30,690 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:30,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:30,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1539837527, now seen corresponding path program 1 times [2021-08-12 21:46:30,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:30,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290823920] [2021-08-12 21:46:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:30,730 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:30,732 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:30,762 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:30,762 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:30,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2021-08-12 21:46:30,762 WARN L235 ceAbstractionStarter]: 123 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:30,762 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 124 thread instances. [2021-08-12 21:46:30,854 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:30,854 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:30,855 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:30,855 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:30,855 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:30,855 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:30,855 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:30,855 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:30,855 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:30,855 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:30,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 626 places, 377 transitions, 16626 flow [2021-08-12 21:46:31,269 INFO L129 PetriNetUnfolder]: 0/749 cut-off events. [2021-08-12 21:46:31,269 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:31,269 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. [2021-08-12 21:46:31,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 626 places, 377 transitions, 16626 flow [2021-08-12 21:46:31,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 624 places, 375 transitions, 16622 flow [2021-08-12 21:46:31,275 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:31,275 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:31,275 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:31,275 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:31,275 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:31,276 INFO L82 PathProgramCache]: Analyzing trace with hash 764899, now seen corresponding path program 1 times [2021-08-12 21:46:31,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:31,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411912861] [2021-08-12 21:46:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:31,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:31,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:31,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:31,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411912861] [2021-08-12 21:46:31,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411912861] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:31,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:31,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:31,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237715790] [2021-08-12 21:46:31,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:31,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:31,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:31,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:31,321 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 374 out of 377 [2021-08-12 21:46:31,322 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) [2021-08-12 21:46:31,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:31,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 374 of 377 [2021-08-12 21:46:31,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:31,814 INFO L129 PetriNetUnfolder]: 0/374 cut-off events. [2021-08-12 21:46:31,814 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:31,814 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. [2021-08-12 21:46:31,815 INFO L132 encePairwiseOnDemand]: 375/377 looper letters, 0 selfloop transitions, 1 changer transitions 0/374 dead transitions. [2021-08-12 21:46:31,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 374 transitions, 16622 flow [2021-08-12 21:46:31,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2021-08-12 21:46:31,815 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9938107869142352 [2021-08-12 21:46:31,815 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2021-08-12 21:46:31,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2021-08-12 21:46:31,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:31,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2021-08-12 21:46:31,816 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) [2021-08-12 21:46:31,817 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) [2021-08-12 21:46:31,817 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) [2021-08-12 21:46:31,817 INFO L348 CegarLoopForPetriNet]: 624 programPoint places, 1 predicate places. [2021-08-12 21:46:31,817 INFO L482 AbstractCegarLoop]: Abstraction has has 625 places, 374 transitions, 16622 flow [2021-08-12 21:46:31,817 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) [2021-08-12 21:46:31,817 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:31,818 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] [2021-08-12 21:46:31,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2021-08-12 21:46:31,818 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:31,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:31,819 INFO L82 PathProgramCache]: Analyzing trace with hash 415961250, now seen corresponding path program 1 times [2021-08-12 21:46:31,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:31,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371971581] [2021-08-12 21:46:31,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:31,853 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:31,857 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:31,886 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:31,886 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:31,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2021-08-12 21:46:31,887 WARN L235 ceAbstractionStarter]: 124 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:31,887 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 125 thread instances. [2021-08-12 21:46:31,977 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:31,978 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:31,978 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:31,978 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:31,978 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:31,978 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:31,978 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:31,978 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:31,978 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:31,978 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:31,982 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 631 places, 380 transitions, 16885 flow [2021-08-12 21:46:32,549 INFO L129 PetriNetUnfolder]: 0/755 cut-off events. [2021-08-12 21:46:32,549 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:32,549 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. [2021-08-12 21:46:32,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 631 places, 380 transitions, 16885 flow [2021-08-12 21:46:32,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 629 places, 378 transitions, 16881 flow [2021-08-12 21:46:32,555 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:32,555 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:32,555 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:32,555 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:32,555 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:32,556 INFO L82 PathProgramCache]: Analyzing trace with hash 777059, now seen corresponding path program 1 times [2021-08-12 21:46:32,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:32,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818103383] [2021-08-12 21:46:32,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:32,604 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:32,604 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:32,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:32,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818103383] [2021-08-12 21:46:32,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818103383] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:32,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:32,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:32,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162568721] [2021-08-12 21:46:32,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:32,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:32,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:32,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:32,609 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 380 [2021-08-12 21:46:32,609 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) [2021-08-12 21:46:32,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:32,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 380 [2021-08-12 21:46:32,609 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:33,091 INFO L129 PetriNetUnfolder]: 0/377 cut-off events. [2021-08-12 21:46:33,091 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:33,091 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. [2021-08-12 21:46:33,092 INFO L132 encePairwiseOnDemand]: 378/380 looper letters, 0 selfloop transitions, 1 changer transitions 0/377 dead transitions. [2021-08-12 21:46:33,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 377 transitions, 16881 flow [2021-08-12 21:46:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:33,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1133 transitions. [2021-08-12 21:46:33,093 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.993859649122807 [2021-08-12 21:46:33,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1133 transitions. [2021-08-12 21:46:33,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1133 transitions. [2021-08-12 21:46:33,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:33,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1133 transitions. [2021-08-12 21:46:33,094 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) [2021-08-12 21:46:33,095 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) [2021-08-12 21:46:33,096 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) [2021-08-12 21:46:33,096 INFO L348 CegarLoopForPetriNet]: 629 programPoint places, 1 predicate places. [2021-08-12 21:46:33,096 INFO L482 AbstractCegarLoop]: Abstraction has has 630 places, 377 transitions, 16881 flow [2021-08-12 21:46:33,096 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) [2021-08-12 21:46:33,096 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:33,096 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] [2021-08-12 21:46:33,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2021-08-12 21:46:33,096 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:33,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:33,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1560628803, now seen corresponding path program 1 times [2021-08-12 21:46:33,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:33,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783870009] [2021-08-12 21:46:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:33,142 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:33,157 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:33,188 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:33,189 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:33,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2021-08-12 21:46:33,189 WARN L235 ceAbstractionStarter]: 125 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:33,189 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 126 thread instances. [2021-08-12 21:46:33,286 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:33,286 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:33,286 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:33,286 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:33,286 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:33,286 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:33,286 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:33,287 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:33,287 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:33,287 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:33,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 636 places, 383 transitions, 17146 flow [2021-08-12 21:46:33,853 INFO L129 PetriNetUnfolder]: 0/761 cut-off events. [2021-08-12 21:46:33,853 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:33,853 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. [2021-08-12 21:46:33,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 636 places, 383 transitions, 17146 flow [2021-08-12 21:46:33,858 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 634 places, 381 transitions, 17142 flow [2021-08-12 21:46:33,859 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:33,859 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:33,859 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:33,860 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:33,860 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:33,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:33,860 INFO L82 PathProgramCache]: Analyzing trace with hash 789315, now seen corresponding path program 1 times [2021-08-12 21:46:33,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:33,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073310592] [2021-08-12 21:46:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:33,901 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:33,901 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:33,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:33,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073310592] [2021-08-12 21:46:33,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073310592] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:33,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:33,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:33,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547232308] [2021-08-12 21:46:33,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:33,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:33,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:33,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:33,904 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 380 out of 383 [2021-08-12 21:46:33,905 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) [2021-08-12 21:46:33,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:33,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 380 of 383 [2021-08-12 21:46:33,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:34,173 INFO L129 PetriNetUnfolder]: 0/380 cut-off events. [2021-08-12 21:46:34,173 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:34,173 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. [2021-08-12 21:46:34,174 INFO L132 encePairwiseOnDemand]: 381/383 looper letters, 0 selfloop transitions, 1 changer transitions 0/380 dead transitions. [2021-08-12 21:46:34,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 380 transitions, 17142 flow [2021-08-12 21:46:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1142 transitions. [2021-08-12 21:46:34,176 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9939077458659704 [2021-08-12 21:46:34,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1142 transitions. [2021-08-12 21:46:34,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1142 transitions. [2021-08-12 21:46:34,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:34,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1142 transitions. [2021-08-12 21:46:34,177 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) [2021-08-12 21:46:34,177 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) [2021-08-12 21:46:34,177 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) [2021-08-12 21:46:34,177 INFO L348 CegarLoopForPetriNet]: 634 programPoint places, 1 predicate places. [2021-08-12 21:46:34,178 INFO L482 AbstractCegarLoop]: Abstraction has has 635 places, 380 transitions, 17142 flow [2021-08-12 21:46:34,178 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) [2021-08-12 21:46:34,178 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:34,178 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] [2021-08-12 21:46:34,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2021-08-12 21:46:34,178 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:34,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:34,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1240720677, now seen corresponding path program 1 times [2021-08-12 21:46:34,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:34,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123091730] [2021-08-12 21:46:34,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:34,231 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:34,234 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:34,268 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:34,268 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:34,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2021-08-12 21:46:34,268 WARN L235 ceAbstractionStarter]: 126 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:34,268 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 127 thread instances. [2021-08-12 21:46:34,500 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:34,501 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:34,501 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:34,501 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:34,501 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:34,501 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:34,502 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:34,502 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:34,502 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:34,502 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:34,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 641 places, 386 transitions, 17409 flow [2021-08-12 21:46:34,823 INFO L129 PetriNetUnfolder]: 0/767 cut-off events. [2021-08-12 21:46:34,824 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:34,824 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. [2021-08-12 21:46:34,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 641 places, 386 transitions, 17409 flow [2021-08-12 21:46:34,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 639 places, 384 transitions, 17405 flow [2021-08-12 21:46:34,843 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:34,843 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:34,843 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:34,843 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:34,843 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash 801667, now seen corresponding path program 1 times [2021-08-12 21:46:34,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:34,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460449032] [2021-08-12 21:46:34,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:34,879 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:34,879 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:34,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:34,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460449032] [2021-08-12 21:46:34,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460449032] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:34,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:34,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:34,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019693437] [2021-08-12 21:46:34,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:34,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:34,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:34,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:34,882 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 386 [2021-08-12 21:46:34,883 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) [2021-08-12 21:46:34,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:34,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 386 [2021-08-12 21:46:34,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:35,193 INFO L129 PetriNetUnfolder]: 0/383 cut-off events. [2021-08-12 21:46:35,193 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:35,194 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. [2021-08-12 21:46:35,194 INFO L132 encePairwiseOnDemand]: 384/386 looper letters, 0 selfloop transitions, 1 changer transitions 0/383 dead transitions. [2021-08-12 21:46:35,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 383 transitions, 17405 flow [2021-08-12 21:46:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1151 transitions. [2021-08-12 21:46:35,195 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9939550949913645 [2021-08-12 21:46:35,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1151 transitions. [2021-08-12 21:46:35,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1151 transitions. [2021-08-12 21:46:35,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:35,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1151 transitions. [2021-08-12 21:46:35,196 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) [2021-08-12 21:46:35,196 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) [2021-08-12 21:46:35,196 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) [2021-08-12 21:46:35,197 INFO L348 CegarLoopForPetriNet]: 639 programPoint places, 1 predicate places. [2021-08-12 21:46:35,197 INFO L482 AbstractCegarLoop]: Abstraction has has 640 places, 383 transitions, 17405 flow [2021-08-12 21:46:35,197 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) [2021-08-12 21:46:35,197 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:35,197 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] [2021-08-12 21:46:35,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2021-08-12 21:46:35,198 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:35,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:35,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1463864931, now seen corresponding path program 1 times [2021-08-12 21:46:35,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:35,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305351993] [2021-08-12 21:46:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:35,236 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:35,273 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:35,307 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:35,308 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:35,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2021-08-12 21:46:35,308 WARN L235 ceAbstractionStarter]: 127 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:35,308 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 128 thread instances. [2021-08-12 21:46:35,431 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:35,434 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:35,435 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:35,435 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:35,435 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:35,435 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:35,435 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:35,435 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:35,435 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:35,435 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:35,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 646 places, 389 transitions, 17674 flow [2021-08-12 21:46:35,786 INFO L129 PetriNetUnfolder]: 0/773 cut-off events. [2021-08-12 21:46:35,786 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:35,786 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. [2021-08-12 21:46:35,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 646 places, 389 transitions, 17674 flow [2021-08-12 21:46:35,792 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 644 places, 387 transitions, 17670 flow [2021-08-12 21:46:35,793 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:35,793 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:35,793 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:35,793 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:35,793 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:35,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:35,793 INFO L82 PathProgramCache]: Analyzing trace with hash 814115, now seen corresponding path program 1 times [2021-08-12 21:46:35,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:35,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988763804] [2021-08-12 21:46:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:35,838 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:35,838 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:35,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:35,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988763804] [2021-08-12 21:46:35,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988763804] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:35,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:35,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:35,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039131364] [2021-08-12 21:46:35,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:35,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:35,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:35,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:35,841 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 386 out of 389 [2021-08-12 21:46:35,841 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) [2021-08-12 21:46:35,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:35,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 386 of 389 [2021-08-12 21:46:35,841 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:36,182 INFO L129 PetriNetUnfolder]: 0/386 cut-off events. [2021-08-12 21:46:36,182 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:36,182 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. [2021-08-12 21:46:36,183 INFO L132 encePairwiseOnDemand]: 387/389 looper letters, 0 selfloop transitions, 1 changer transitions 0/386 dead transitions. [2021-08-12 21:46:36,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 386 transitions, 17670 flow [2021-08-12 21:46:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:36,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1160 transitions. [2021-08-12 21:46:36,184 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9940017137960583 [2021-08-12 21:46:36,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1160 transitions. [2021-08-12 21:46:36,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1160 transitions. [2021-08-12 21:46:36,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:36,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1160 transitions. [2021-08-12 21:46:36,185 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) [2021-08-12 21:46:36,186 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) [2021-08-12 21:46:36,186 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) [2021-08-12 21:46:36,186 INFO L348 CegarLoopForPetriNet]: 644 programPoint places, 1 predicate places. [2021-08-12 21:46:36,186 INFO L482 AbstractCegarLoop]: Abstraction has has 645 places, 386 transitions, 17670 flow [2021-08-12 21:46:36,186 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) [2021-08-12 21:46:36,186 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:36,186 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] [2021-08-12 21:46:36,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2021-08-12 21:46:36,186 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:36,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:36,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1931559704, now seen corresponding path program 1 times [2021-08-12 21:46:36,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:36,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423979100] [2021-08-12 21:46:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:36,237 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:36,239 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:36,274 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:36,275 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:36,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2021-08-12 21:46:36,275 WARN L235 ceAbstractionStarter]: 128 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:36,275 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 129 thread instances. [2021-08-12 21:46:36,375 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:36,376 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:36,376 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:36,376 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:36,376 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:36,376 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:36,376 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:36,376 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:36,376 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:36,376 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:36,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 651 places, 392 transitions, 17941 flow [2021-08-12 21:46:37,025 INFO L129 PetriNetUnfolder]: 0/779 cut-off events. [2021-08-12 21:46:37,026 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:37,026 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. [2021-08-12 21:46:37,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 651 places, 392 transitions, 17941 flow [2021-08-12 21:46:37,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 649 places, 390 transitions, 17937 flow [2021-08-12 21:46:37,033 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:37,033 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:37,033 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:37,033 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:37,033 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:37,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:37,033 INFO L82 PathProgramCache]: Analyzing trace with hash 826659, now seen corresponding path program 1 times [2021-08-12 21:46:37,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:37,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859806980] [2021-08-12 21:46:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:37,086 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:37,086 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:37,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:37,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859806980] [2021-08-12 21:46:37,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859806980] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:37,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:37,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:37,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162230223] [2021-08-12 21:46:37,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:37,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:37,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:37,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:37,090 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 392 [2021-08-12 21:46:37,090 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) [2021-08-12 21:46:37,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:37,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 392 [2021-08-12 21:46:37,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:37,368 INFO L129 PetriNetUnfolder]: 0/389 cut-off events. [2021-08-12 21:46:37,368 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:37,368 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. [2021-08-12 21:46:37,369 INFO L132 encePairwiseOnDemand]: 390/392 looper letters, 0 selfloop transitions, 1 changer transitions 0/389 dead transitions. [2021-08-12 21:46:37,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 389 transitions, 17937 flow [2021-08-12 21:46:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:37,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1169 transitions. [2021-08-12 21:46:37,370 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9940476190476191 [2021-08-12 21:46:37,370 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1169 transitions. [2021-08-12 21:46:37,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1169 transitions. [2021-08-12 21:46:37,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:37,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1169 transitions. [2021-08-12 21:46:37,371 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) [2021-08-12 21:46:37,372 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) [2021-08-12 21:46:37,372 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) [2021-08-12 21:46:37,372 INFO L348 CegarLoopForPetriNet]: 649 programPoint places, 1 predicate places. [2021-08-12 21:46:37,372 INFO L482 AbstractCegarLoop]: Abstraction has has 650 places, 389 transitions, 17937 flow [2021-08-12 21:46:37,372 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) [2021-08-12 21:46:37,372 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:37,372 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] [2021-08-12 21:46:37,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2021-08-12 21:46:37,372 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1029630775, now seen corresponding path program 1 times [2021-08-12 21:46:37,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:37,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093113115] [2021-08-12 21:46:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:37,640 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:37,642 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:37,674 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:37,674 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:37,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257 [2021-08-12 21:46:37,675 WARN L235 ceAbstractionStarter]: 129 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:37,675 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 130 thread instances. [2021-08-12 21:46:37,772 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:37,773 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:37,773 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:37,773 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:37,773 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:37,773 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:37,773 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:37,773 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:37,773 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:37,773 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:37,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 656 places, 395 transitions, 18210 flow [2021-08-12 21:46:38,096 INFO L129 PetriNetUnfolder]: 0/785 cut-off events. [2021-08-12 21:46:38,096 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:38,096 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. [2021-08-12 21:46:38,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 656 places, 395 transitions, 18210 flow [2021-08-12 21:46:38,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 654 places, 393 transitions, 18206 flow [2021-08-12 21:46:38,103 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:38,103 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:38,103 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:38,103 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:38,103 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:38,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:38,104 INFO L82 PathProgramCache]: Analyzing trace with hash 839299, now seen corresponding path program 1 times [2021-08-12 21:46:38,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:38,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899828860] [2021-08-12 21:46:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:38,239 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:38,239 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:38,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:38,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899828860] [2021-08-12 21:46:38,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899828860] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:38,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:38,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:38,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701764212] [2021-08-12 21:46:38,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:38,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:38,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:38,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:38,242 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 392 out of 395 [2021-08-12 21:46:38,243 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) [2021-08-12 21:46:38,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:38,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 392 of 395 [2021-08-12 21:46:38,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:38,508 INFO L129 PetriNetUnfolder]: 0/392 cut-off events. [2021-08-12 21:46:38,508 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:38,508 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. [2021-08-12 21:46:38,509 INFO L132 encePairwiseOnDemand]: 393/395 looper letters, 0 selfloop transitions, 1 changer transitions 0/392 dead transitions. [2021-08-12 21:46:38,509 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 392 transitions, 18206 flow [2021-08-12 21:46:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1178 transitions. [2021-08-12 21:46:38,510 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9940928270042194 [2021-08-12 21:46:38,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1178 transitions. [2021-08-12 21:46:38,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1178 transitions. [2021-08-12 21:46:38,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:38,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1178 transitions. [2021-08-12 21:46:38,511 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) [2021-08-12 21:46:38,511 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) [2021-08-12 21:46:38,511 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) [2021-08-12 21:46:38,512 INFO L348 CegarLoopForPetriNet]: 654 programPoint places, 1 predicate places. [2021-08-12 21:46:38,512 INFO L482 AbstractCegarLoop]: Abstraction has has 655 places, 392 transitions, 18206 flow [2021-08-12 21:46:38,512 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) [2021-08-12 21:46:38,512 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:38,512 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] [2021-08-12 21:46:38,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258 [2021-08-12 21:46:38,512 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:38,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:38,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2028284821, now seen corresponding path program 1 times [2021-08-12 21:46:38,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:38,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163035615] [2021-08-12 21:46:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:38,557 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:38,559 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:38,593 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:38,593 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:38,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259 [2021-08-12 21:46:38,594 WARN L235 ceAbstractionStarter]: 130 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:38,594 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 131 thread instances. [2021-08-12 21:46:38,692 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:38,693 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:38,693 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:38,693 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:38,693 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:38,693 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:38,693 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:38,693 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:38,693 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:38,693 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:38,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 661 places, 398 transitions, 18481 flow [2021-08-12 21:46:39,094 INFO L129 PetriNetUnfolder]: 0/791 cut-off events. [2021-08-12 21:46:39,094 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:39,094 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. [2021-08-12 21:46:39,094 INFO L82 GeneralOperation]: Start removeDead. Operand has 661 places, 398 transitions, 18481 flow [2021-08-12 21:46:39,100 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 659 places, 396 transitions, 18477 flow [2021-08-12 21:46:39,101 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:39,101 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:39,101 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:39,101 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:39,101 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:39,101 INFO L82 PathProgramCache]: Analyzing trace with hash 852035, now seen corresponding path program 1 times [2021-08-12 21:46:39,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:39,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76964529] [2021-08-12 21:46:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:39,148 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:39,148 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:39,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:39,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76964529] [2021-08-12 21:46:39,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76964529] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:39,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:39,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:39,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805645027] [2021-08-12 21:46:39,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:39,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:39,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:39,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:39,151 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 398 [2021-08-12 21:46:39,152 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) [2021-08-12 21:46:39,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:39,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 398 [2021-08-12 21:46:39,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:39,582 INFO L129 PetriNetUnfolder]: 0/395 cut-off events. [2021-08-12 21:46:39,583 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:39,583 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. [2021-08-12 21:46:39,584 INFO L132 encePairwiseOnDemand]: 396/398 looper letters, 0 selfloop transitions, 1 changer transitions 0/395 dead transitions. [2021-08-12 21:46:39,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 395 transitions, 18477 flow [2021-08-12 21:46:39,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:39,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1187 transitions. [2021-08-12 21:46:39,585 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9941373534338358 [2021-08-12 21:46:39,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1187 transitions. [2021-08-12 21:46:39,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1187 transitions. [2021-08-12 21:46:39,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:39,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1187 transitions. [2021-08-12 21:46:39,586 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) [2021-08-12 21:46:39,586 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) [2021-08-12 21:46:39,587 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) [2021-08-12 21:46:39,587 INFO L348 CegarLoopForPetriNet]: 659 programPoint places, 1 predicate places. [2021-08-12 21:46:39,587 INFO L482 AbstractCegarLoop]: Abstraction has has 660 places, 395 transitions, 18477 flow [2021-08-12 21:46:39,587 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) [2021-08-12 21:46:39,587 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:39,587 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] [2021-08-12 21:46:39,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260 [2021-08-12 21:46:39,587 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:39,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:39,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1854553793, now seen corresponding path program 1 times [2021-08-12 21:46:39,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:39,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450731068] [2021-08-12 21:46:39,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:39,642 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:39,644 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:39,682 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:39,682 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:39,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261 [2021-08-12 21:46:39,682 WARN L235 ceAbstractionStarter]: 131 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:39,682 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 132 thread instances. [2021-08-12 21:46:39,787 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:39,788 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:39,788 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:39,788 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:39,788 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:39,788 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:39,788 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:39,788 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:39,788 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:39,788 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:39,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 666 places, 401 transitions, 18754 flow [2021-08-12 21:46:40,342 INFO L129 PetriNetUnfolder]: 0/797 cut-off events. [2021-08-12 21:46:40,343 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:40,343 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. [2021-08-12 21:46:40,343 INFO L82 GeneralOperation]: Start removeDead. Operand has 666 places, 401 transitions, 18754 flow [2021-08-12 21:46:40,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 664 places, 399 transitions, 18750 flow [2021-08-12 21:46:40,350 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:40,350 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:40,350 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:40,350 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:40,350 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:40,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:40,350 INFO L82 PathProgramCache]: Analyzing trace with hash 864867, now seen corresponding path program 1 times [2021-08-12 21:46:40,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:40,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168182107] [2021-08-12 21:46:40,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:40,396 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:40,396 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:40,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:40,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168182107] [2021-08-12 21:46:40,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168182107] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:40,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:40,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:40,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845902756] [2021-08-12 21:46:40,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:40,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:40,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:40,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:40,399 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 401 [2021-08-12 21:46:40,399 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) [2021-08-12 21:46:40,399 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:40,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 401 [2021-08-12 21:46:40,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:40,912 INFO L129 PetriNetUnfolder]: 0/398 cut-off events. [2021-08-12 21:46:40,912 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:40,912 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. [2021-08-12 21:46:40,913 INFO L132 encePairwiseOnDemand]: 399/401 looper letters, 0 selfloop transitions, 1 changer transitions 0/398 dead transitions. [2021-08-12 21:46:40,913 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 398 transitions, 18750 flow [2021-08-12 21:46:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1196 transitions. [2021-08-12 21:46:40,914 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9941812136325852 [2021-08-12 21:46:40,914 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1196 transitions. [2021-08-12 21:46:40,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1196 transitions. [2021-08-12 21:46:40,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:40,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1196 transitions. [2021-08-12 21:46:40,915 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) [2021-08-12 21:46:40,915 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) [2021-08-12 21:46:40,916 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) [2021-08-12 21:46:40,916 INFO L348 CegarLoopForPetriNet]: 664 programPoint places, 1 predicate places. [2021-08-12 21:46:40,916 INFO L482 AbstractCegarLoop]: Abstraction has has 665 places, 398 transitions, 18750 flow [2021-08-12 21:46:40,916 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) [2021-08-12 21:46:40,916 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:40,916 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] [2021-08-12 21:46:40,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2021-08-12 21:46:40,916 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:40,916 INFO L82 PathProgramCache]: Analyzing trace with hash -572446674, now seen corresponding path program 1 times [2021-08-12 21:46:40,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:40,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272171918] [2021-08-12 21:46:40,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:40,962 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:40,964 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:41,000 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:41,000 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:41,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2021-08-12 21:46:41,000 WARN L235 ceAbstractionStarter]: 132 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:41,000 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 133 thread instances. [2021-08-12 21:46:41,101 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:41,101 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:41,102 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:41,102 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:41,102 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:41,102 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:41,102 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:41,102 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:41,102 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:41,102 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:41,106 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 671 places, 404 transitions, 19029 flow [2021-08-12 21:46:41,733 INFO L129 PetriNetUnfolder]: 0/803 cut-off events. [2021-08-12 21:46:41,733 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:41,733 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. [2021-08-12 21:46:41,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 671 places, 404 transitions, 19029 flow [2021-08-12 21:46:41,740 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 669 places, 402 transitions, 19025 flow [2021-08-12 21:46:41,740 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:41,740 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:41,740 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:41,740 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:41,740 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:41,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:41,741 INFO L82 PathProgramCache]: Analyzing trace with hash 877795, now seen corresponding path program 1 times [2021-08-12 21:46:41,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:41,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540700574] [2021-08-12 21:46:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:41,785 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:41,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:41,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:41,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540700574] [2021-08-12 21:46:41,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540700574] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:41,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:41,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:41,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000537165] [2021-08-12 21:46:41,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:41,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:41,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:41,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:41,788 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 401 out of 404 [2021-08-12 21:46:41,788 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) [2021-08-12 21:46:41,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:41,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 401 of 404 [2021-08-12 21:46:41,789 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:42,056 INFO L129 PetriNetUnfolder]: 0/401 cut-off events. [2021-08-12 21:46:42,056 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:42,056 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. [2021-08-12 21:46:42,057 INFO L132 encePairwiseOnDemand]: 402/404 looper letters, 0 selfloop transitions, 1 changer transitions 0/401 dead transitions. [2021-08-12 21:46:42,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 401 transitions, 19025 flow [2021-08-12 21:46:42,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:42,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:42,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1205 transitions. [2021-08-12 21:46:42,058 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9942244224422442 [2021-08-12 21:46:42,058 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1205 transitions. [2021-08-12 21:46:42,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1205 transitions. [2021-08-12 21:46:42,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:42,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1205 transitions. [2021-08-12 21:46:42,059 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) [2021-08-12 21:46:42,060 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) [2021-08-12 21:46:42,060 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) [2021-08-12 21:46:42,060 INFO L348 CegarLoopForPetriNet]: 669 programPoint places, 1 predicate places. [2021-08-12 21:46:42,060 INFO L482 AbstractCegarLoop]: Abstraction has has 670 places, 401 transitions, 19025 flow [2021-08-12 21:46:42,060 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) [2021-08-12 21:46:42,060 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:42,060 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] [2021-08-12 21:46:42,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2021-08-12 21:46:42,060 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:42,060 INFO L82 PathProgramCache]: Analyzing trace with hash 146985733, now seen corresponding path program 1 times [2021-08-12 21:46:42,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:42,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198806575] [2021-08-12 21:46:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:42,383 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:42,386 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:42,437 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:42,437 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:42,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265 [2021-08-12 21:46:42,437 WARN L235 ceAbstractionStarter]: 133 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:42,437 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 134 thread instances. [2021-08-12 21:46:42,556 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:42,556 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:42,557 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:42,557 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:42,557 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:42,557 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:42,557 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:42,557 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:42,557 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:42,557 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:42,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 676 places, 407 transitions, 19306 flow [2021-08-12 21:46:42,953 INFO L129 PetriNetUnfolder]: 0/809 cut-off events. [2021-08-12 21:46:42,953 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:42,953 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. [2021-08-12 21:46:42,953 INFO L82 GeneralOperation]: Start removeDead. Operand has 676 places, 407 transitions, 19306 flow [2021-08-12 21:46:42,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 674 places, 405 transitions, 19302 flow [2021-08-12 21:46:42,960 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:42,961 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:42,961 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:42,961 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:42,961 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:42,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:42,961 INFO L82 PathProgramCache]: Analyzing trace with hash 890819, now seen corresponding path program 1 times [2021-08-12 21:46:42,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:42,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037371007] [2021-08-12 21:46:42,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:43,180 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:43,181 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:43,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:43,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037371007] [2021-08-12 21:46:43,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037371007] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:43,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:43,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:43,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919075770] [2021-08-12 21:46:43,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:43,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:43,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:43,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:43,185 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 404 out of 407 [2021-08-12 21:46:43,185 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) [2021-08-12 21:46:43,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:43,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 404 of 407 [2021-08-12 21:46:43,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:43,465 INFO L129 PetriNetUnfolder]: 0/404 cut-off events. [2021-08-12 21:46:43,466 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:43,466 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. [2021-08-12 21:46:43,467 INFO L132 encePairwiseOnDemand]: 405/407 looper letters, 0 selfloop transitions, 1 changer transitions 0/404 dead transitions. [2021-08-12 21:46:43,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 404 transitions, 19302 flow [2021-08-12 21:46:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1214 transitions. [2021-08-12 21:46:43,467 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9942669942669943 [2021-08-12 21:46:43,467 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1214 transitions. [2021-08-12 21:46:43,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1214 transitions. [2021-08-12 21:46:43,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:43,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1214 transitions. [2021-08-12 21:46:43,468 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) [2021-08-12 21:46:43,469 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) [2021-08-12 21:46:43,469 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) [2021-08-12 21:46:43,469 INFO L348 CegarLoopForPetriNet]: 674 programPoint places, 1 predicate places. [2021-08-12 21:46:43,469 INFO L482 AbstractCegarLoop]: Abstraction has has 675 places, 404 transitions, 19302 flow [2021-08-12 21:46:43,469 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) [2021-08-12 21:46:43,469 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:43,469 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] [2021-08-12 21:46:43,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266 [2021-08-12 21:46:43,470 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:43,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:43,470 INFO L82 PathProgramCache]: Analyzing trace with hash 461665457, now seen corresponding path program 1 times [2021-08-12 21:46:43,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:43,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690221485] [2021-08-12 21:46:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:43,516 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:43,518 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:43,555 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:43,555 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:43,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267 [2021-08-12 21:46:43,555 WARN L235 ceAbstractionStarter]: 134 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:43,555 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 135 thread instances. [2021-08-12 21:46:43,659 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:43,660 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:43,660 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:43,660 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:43,660 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:43,660 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:43,660 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:43,660 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:43,660 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:43,660 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:43,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 681 places, 410 transitions, 19585 flow [2021-08-12 21:46:44,089 INFO L129 PetriNetUnfolder]: 0/815 cut-off events. [2021-08-12 21:46:44,089 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:44,089 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. [2021-08-12 21:46:44,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 681 places, 410 transitions, 19585 flow [2021-08-12 21:46:44,095 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 679 places, 408 transitions, 19581 flow [2021-08-12 21:46:44,096 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:44,096 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:44,096 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:44,096 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:44,096 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:44,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:44,096 INFO L82 PathProgramCache]: Analyzing trace with hash 903939, now seen corresponding path program 1 times [2021-08-12 21:46:44,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:44,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379954748] [2021-08-12 21:46:44,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:44,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:44,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:44,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:44,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379954748] [2021-08-12 21:46:44,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379954748] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:44,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:44,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:44,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027566592] [2021-08-12 21:46:44,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:44,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:44,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:44,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:44,144 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 407 out of 410 [2021-08-12 21:46:44,145 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) [2021-08-12 21:46:44,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:44,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 407 of 410 [2021-08-12 21:46:44,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:44,543 INFO L129 PetriNetUnfolder]: 0/407 cut-off events. [2021-08-12 21:46:44,543 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:44,543 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. [2021-08-12 21:46:44,544 INFO L132 encePairwiseOnDemand]: 408/410 looper letters, 0 selfloop transitions, 1 changer transitions 0/407 dead transitions. [2021-08-12 21:46:44,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 407 transitions, 19581 flow [2021-08-12 21:46:44,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:44,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:44,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1223 transitions. [2021-08-12 21:46:44,545 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9943089430894309 [2021-08-12 21:46:44,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1223 transitions. [2021-08-12 21:46:44,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1223 transitions. [2021-08-12 21:46:44,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:44,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1223 transitions. [2021-08-12 21:46:44,546 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) [2021-08-12 21:46:44,546 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) [2021-08-12 21:46:44,546 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) [2021-08-12 21:46:44,546 INFO L348 CegarLoopForPetriNet]: 679 programPoint places, 1 predicate places. [2021-08-12 21:46:44,546 INFO L482 AbstractCegarLoop]: Abstraction has has 680 places, 407 transitions, 19581 flow [2021-08-12 21:46:44,546 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) [2021-08-12 21:46:44,547 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:44,547 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] [2021-08-12 21:46:44,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268 [2021-08-12 21:46:44,547 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:44,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:44,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1283377899, now seen corresponding path program 1 times [2021-08-12 21:46:44,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:44,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581791787] [2021-08-12 21:46:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:44,605 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:44,608 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:44,646 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:44,646 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:44,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269 [2021-08-12 21:46:44,646 WARN L235 ceAbstractionStarter]: 135 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:44,646 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 136 thread instances. [2021-08-12 21:46:44,775 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:44,776 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:44,776 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:44,776 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:44,776 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:44,776 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:44,776 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:44,776 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:44,776 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:44,776 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:44,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 686 places, 413 transitions, 19866 flow [2021-08-12 21:46:45,320 INFO L129 PetriNetUnfolder]: 0/821 cut-off events. [2021-08-12 21:46:45,320 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:45,320 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. [2021-08-12 21:46:45,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 686 places, 413 transitions, 19866 flow [2021-08-12 21:46:45,327 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 684 places, 411 transitions, 19862 flow [2021-08-12 21:46:45,327 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:45,327 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:45,327 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:45,327 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:45,327 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:45,328 INFO L82 PathProgramCache]: Analyzing trace with hash 917155, now seen corresponding path program 1 times [2021-08-12 21:46:45,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:45,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820673328] [2021-08-12 21:46:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:45,390 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:45,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:45,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:45,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820673328] [2021-08-12 21:46:45,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820673328] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:45,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:45,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:45,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830781335] [2021-08-12 21:46:45,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:45,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:45,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:45,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:45,394 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 410 out of 413 [2021-08-12 21:46:45,395 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) [2021-08-12 21:46:45,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:45,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 410 of 413 [2021-08-12 21:46:45,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:45,797 INFO L129 PetriNetUnfolder]: 0/410 cut-off events. [2021-08-12 21:46:45,797 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:45,797 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. [2021-08-12 21:46:45,798 INFO L132 encePairwiseOnDemand]: 411/413 looper letters, 0 selfloop transitions, 1 changer transitions 0/410 dead transitions. [2021-08-12 21:46:45,798 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 685 places, 410 transitions, 19862 flow [2021-08-12 21:46:45,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:45,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1232 transitions. [2021-08-12 21:46:45,799 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9943502824858758 [2021-08-12 21:46:45,799 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1232 transitions. [2021-08-12 21:46:45,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1232 transitions. [2021-08-12 21:46:45,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:45,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1232 transitions. [2021-08-12 21:46:45,800 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) [2021-08-12 21:46:45,800 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) [2021-08-12 21:46:45,800 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) [2021-08-12 21:46:45,800 INFO L348 CegarLoopForPetriNet]: 684 programPoint places, 1 predicate places. [2021-08-12 21:46:45,800 INFO L482 AbstractCegarLoop]: Abstraction has has 685 places, 410 transitions, 19862 flow [2021-08-12 21:46:45,800 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) [2021-08-12 21:46:45,800 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:45,800 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] [2021-08-12 21:46:45,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2021-08-12 21:46:45,801 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:45,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:45,801 INFO L82 PathProgramCache]: Analyzing trace with hash -622774668, now seen corresponding path program 1 times [2021-08-12 21:46:45,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:45,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535204473] [2021-08-12 21:46:45,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:45,859 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:45,861 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:45,898 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:45,898 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:45,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2021-08-12 21:46:45,899 WARN L235 ceAbstractionStarter]: 136 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:45,899 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 137 thread instances. [2021-08-12 21:46:46,003 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:46,003 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:46,004 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:46,004 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:46,004 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:46,004 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:46,004 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:46,004 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:46,004 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:46,004 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:46,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 691 places, 416 transitions, 20149 flow [2021-08-12 21:46:46,583 INFO L129 PetriNetUnfolder]: 0/827 cut-off events. [2021-08-12 21:46:46,584 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:46,584 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. [2021-08-12 21:46:46,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 691 places, 416 transitions, 20149 flow [2021-08-12 21:46:46,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 689 places, 414 transitions, 20145 flow [2021-08-12 21:46:46,591 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:46,591 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:46,591 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:46,591 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:46,591 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:46,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:46,591 INFO L82 PathProgramCache]: Analyzing trace with hash 930467, now seen corresponding path program 1 times [2021-08-12 21:46:46,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:46,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627605283] [2021-08-12 21:46:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:46,654 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:46,654 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:46,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:46,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627605283] [2021-08-12 21:46:46,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627605283] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:46,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:46,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:46,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448622862] [2021-08-12 21:46:46,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:46,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:46,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:46,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:46,658 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 413 out of 416 [2021-08-12 21:46:46,659 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) [2021-08-12 21:46:46,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:46,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 413 of 416 [2021-08-12 21:46:46,659 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:47,168 INFO L129 PetriNetUnfolder]: 0/413 cut-off events. [2021-08-12 21:46:47,169 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:47,169 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. [2021-08-12 21:46:47,170 INFO L132 encePairwiseOnDemand]: 414/416 looper letters, 0 selfloop transitions, 1 changer transitions 0/413 dead transitions. [2021-08-12 21:46:47,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 413 transitions, 20145 flow [2021-08-12 21:46:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:47,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1241 transitions. [2021-08-12 21:46:47,170 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9943910256410257 [2021-08-12 21:46:47,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1241 transitions. [2021-08-12 21:46:47,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1241 transitions. [2021-08-12 21:46:47,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:47,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1241 transitions. [2021-08-12 21:46:47,171 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) [2021-08-12 21:46:47,172 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) [2021-08-12 21:46:47,172 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) [2021-08-12 21:46:47,172 INFO L348 CegarLoopForPetriNet]: 689 programPoint places, 1 predicate places. [2021-08-12 21:46:47,172 INFO L482 AbstractCegarLoop]: Abstraction has has 690 places, 413 transitions, 20145 flow [2021-08-12 21:46:47,172 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) [2021-08-12 21:46:47,172 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:47,172 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] [2021-08-12 21:46:47,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272 [2021-08-12 21:46:47,173 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:47,173 INFO L82 PathProgramCache]: Analyzing trace with hash 947521649, now seen corresponding path program 1 times [2021-08-12 21:46:47,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:47,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437897765] [2021-08-12 21:46:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:47,258 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:47,260 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:47,298 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:47,298 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:47,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273 [2021-08-12 21:46:47,298 WARN L235 ceAbstractionStarter]: 137 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:47,298 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 138 thread instances. [2021-08-12 21:46:47,403 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:47,404 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:47,404 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:47,404 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:47,404 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:47,404 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:47,404 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:47,404 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:47,404 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:47,404 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:47,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 696 places, 419 transitions, 20434 flow [2021-08-12 21:46:48,009 INFO L129 PetriNetUnfolder]: 0/833 cut-off events. [2021-08-12 21:46:48,009 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:48,009 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. [2021-08-12 21:46:48,009 INFO L82 GeneralOperation]: Start removeDead. Operand has 696 places, 419 transitions, 20434 flow [2021-08-12 21:46:48,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 694 places, 417 transitions, 20430 flow [2021-08-12 21:46:48,018 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:48,018 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:48,018 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:48,018 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:48,018 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:48,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:48,018 INFO L82 PathProgramCache]: Analyzing trace with hash 943875, now seen corresponding path program 1 times [2021-08-12 21:46:48,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:48,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044579583] [2021-08-12 21:46:48,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:48,078 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:48,078 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:48,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:48,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044579583] [2021-08-12 21:46:48,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044579583] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:48,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:48,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:48,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119643403] [2021-08-12 21:46:48,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:48,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:48,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:48,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:48,081 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 416 out of 419 [2021-08-12 21:46:48,082 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) [2021-08-12 21:46:48,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:48,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 416 of 419 [2021-08-12 21:46:48,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:48,393 INFO L129 PetriNetUnfolder]: 0/416 cut-off events. [2021-08-12 21:46:48,393 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:48,393 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. [2021-08-12 21:46:48,394 INFO L132 encePairwiseOnDemand]: 417/419 looper letters, 0 selfloop transitions, 1 changer transitions 0/416 dead transitions. [2021-08-12 21:46:48,394 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 416 transitions, 20430 flow [2021-08-12 21:46:48,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:48,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:48,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1250 transitions. [2021-08-12 21:46:48,395 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.994431185361973 [2021-08-12 21:46:48,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1250 transitions. [2021-08-12 21:46:48,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1250 transitions. [2021-08-12 21:46:48,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:48,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1250 transitions. [2021-08-12 21:46:48,396 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) [2021-08-12 21:46:48,396 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) [2021-08-12 21:46:48,396 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) [2021-08-12 21:46:48,397 INFO L348 CegarLoopForPetriNet]: 694 programPoint places, 1 predicate places. [2021-08-12 21:46:48,397 INFO L482 AbstractCegarLoop]: Abstraction has has 695 places, 416 transitions, 20430 flow [2021-08-12 21:46:48,397 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) [2021-08-12 21:46:48,397 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:48,397 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] [2021-08-12 21:46:48,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274 [2021-08-12 21:46:48,397 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:48,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1194481161, now seen corresponding path program 1 times [2021-08-12 21:46:48,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:48,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238391199] [2021-08-12 21:46:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:48,649 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:48,651 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:48,690 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:48,690 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:48,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275 [2021-08-12 21:46:48,691 WARN L235 ceAbstractionStarter]: 138 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:48,691 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 139 thread instances. [2021-08-12 21:46:48,797 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:48,798 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:48,798 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:48,798 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:48,798 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:48,798 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:48,798 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:48,798 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:48,798 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:48,798 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:48,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 701 places, 422 transitions, 20721 flow [2021-08-12 21:46:49,396 INFO L129 PetriNetUnfolder]: 0/839 cut-off events. [2021-08-12 21:46:49,396 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:49,396 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. [2021-08-12 21:46:49,396 INFO L82 GeneralOperation]: Start removeDead. Operand has 701 places, 422 transitions, 20721 flow [2021-08-12 21:46:49,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 699 places, 420 transitions, 20717 flow [2021-08-12 21:46:49,403 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:49,403 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:49,403 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:49,403 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:49,403 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:49,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:49,403 INFO L82 PathProgramCache]: Analyzing trace with hash 957379, now seen corresponding path program 1 times [2021-08-12 21:46:49,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:49,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477435056] [2021-08-12 21:46:49,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:49,480 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:49,481 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:49,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:49,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477435056] [2021-08-12 21:46:49,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477435056] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:49,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:49,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:49,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748137681] [2021-08-12 21:46:49,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:49,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:49,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:49,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:49,484 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 419 out of 422 [2021-08-12 21:46:49,484 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) [2021-08-12 21:46:49,484 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:49,484 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 419 of 422 [2021-08-12 21:46:49,484 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:49,929 INFO L129 PetriNetUnfolder]: 0/419 cut-off events. [2021-08-12 21:46:49,929 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:49,930 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. [2021-08-12 21:46:49,931 INFO L132 encePairwiseOnDemand]: 420/422 looper letters, 0 selfloop transitions, 1 changer transitions 0/419 dead transitions. [2021-08-12 21:46:49,931 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 419 transitions, 20717 flow [2021-08-12 21:46:49,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:49,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1259 transitions. [2021-08-12 21:46:49,932 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9944707740916272 [2021-08-12 21:46:49,932 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1259 transitions. [2021-08-12 21:46:49,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1259 transitions. [2021-08-12 21:46:49,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:49,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1259 transitions. [2021-08-12 21:46:49,933 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) [2021-08-12 21:46:49,933 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) [2021-08-12 21:46:49,934 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) [2021-08-12 21:46:49,934 INFO L348 CegarLoopForPetriNet]: 699 programPoint places, 1 predicate places. [2021-08-12 21:46:49,934 INFO L482 AbstractCegarLoop]: Abstraction has has 700 places, 419 transitions, 20717 flow [2021-08-12 21:46:49,934 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) [2021-08-12 21:46:49,934 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:49,934 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] [2021-08-12 21:46:49,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276 [2021-08-12 21:46:49,934 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:49,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:49,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1685074073, now seen corresponding path program 1 times [2021-08-12 21:46:49,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:49,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753169326] [2021-08-12 21:46:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:50,291 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:50,294 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:50,329 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:50,329 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:50,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277 [2021-08-12 21:46:50,329 WARN L235 ceAbstractionStarter]: 139 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:50,329 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 140 thread instances. [2021-08-12 21:46:50,445 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:50,446 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:50,446 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:50,446 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:50,446 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:50,446 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:50,446 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:50,446 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:50,446 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:50,446 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:50,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 706 places, 425 transitions, 21010 flow [2021-08-12 21:46:50,920 INFO L129 PetriNetUnfolder]: 0/845 cut-off events. [2021-08-12 21:46:50,920 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:50,920 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. [2021-08-12 21:46:50,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 706 places, 425 transitions, 21010 flow [2021-08-12 21:46:50,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 704 places, 423 transitions, 21006 flow [2021-08-12 21:46:50,928 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:50,928 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:50,928 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:50,928 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:50,928 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:50,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:50,928 INFO L82 PathProgramCache]: Analyzing trace with hash 970979, now seen corresponding path program 1 times [2021-08-12 21:46:50,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:50,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450087325] [2021-08-12 21:46:50,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:50,988 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:50,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:50,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:50,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450087325] [2021-08-12 21:46:50,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450087325] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:50,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:50,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:50,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132003995] [2021-08-12 21:46:50,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:50,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:50,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:50,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:50,991 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 422 out of 425 [2021-08-12 21:46:50,991 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) [2021-08-12 21:46:50,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:50,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 422 of 425 [2021-08-12 21:46:50,992 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:51,371 INFO L129 PetriNetUnfolder]: 0/422 cut-off events. [2021-08-12 21:46:51,372 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:51,372 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. [2021-08-12 21:46:51,373 INFO L132 encePairwiseOnDemand]: 423/425 looper letters, 0 selfloop transitions, 1 changer transitions 0/422 dead transitions. [2021-08-12 21:46:51,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 422 transitions, 21006 flow [2021-08-12 21:46:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:51,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1268 transitions. [2021-08-12 21:46:51,374 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9945098039215686 [2021-08-12 21:46:51,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1268 transitions. [2021-08-12 21:46:51,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1268 transitions. [2021-08-12 21:46:51,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:51,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1268 transitions. [2021-08-12 21:46:51,375 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) [2021-08-12 21:46:51,375 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) [2021-08-12 21:46:51,375 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) [2021-08-12 21:46:51,376 INFO L348 CegarLoopForPetriNet]: 704 programPoint places, 1 predicate places. [2021-08-12 21:46:51,376 INFO L482 AbstractCegarLoop]: Abstraction has has 705 places, 422 transitions, 21006 flow [2021-08-12 21:46:51,376 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) [2021-08-12 21:46:51,376 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:51,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:46:51,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278 [2021-08-12 21:46:51,376 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:51,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1953903686, now seen corresponding path program 1 times [2021-08-12 21:46:51,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:51,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167326048] [2021-08-12 21:46:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:51,438 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:51,440 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:51,480 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:51,480 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:51,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279 [2021-08-12 21:46:51,480 WARN L235 ceAbstractionStarter]: 140 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:51,480 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 141 thread instances. [2021-08-12 21:46:51,584 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:51,585 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:51,585 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:51,585 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:51,585 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:51,585 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:51,585 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:51,585 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:51,585 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:51,585 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:51,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 711 places, 428 transitions, 21301 flow [2021-08-12 21:46:52,093 INFO L129 PetriNetUnfolder]: 0/851 cut-off events. [2021-08-12 21:46:52,093 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:52,093 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. [2021-08-12 21:46:52,093 INFO L82 GeneralOperation]: Start removeDead. Operand has 711 places, 428 transitions, 21301 flow [2021-08-12 21:46:52,100 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 709 places, 426 transitions, 21297 flow [2021-08-12 21:46:52,100 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:52,101 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:52,101 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:52,101 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:52,101 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:52,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:52,101 INFO L82 PathProgramCache]: Analyzing trace with hash 984675, now seen corresponding path program 1 times [2021-08-12 21:46:52,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:52,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326351996] [2021-08-12 21:46:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:52,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:52,163 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:52,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:52,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326351996] [2021-08-12 21:46:52,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326351996] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:52,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:52,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:52,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369040686] [2021-08-12 21:46:52,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:52,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:52,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:52,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:52,166 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 425 out of 428 [2021-08-12 21:46:52,166 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) [2021-08-12 21:46:52,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:52,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 425 of 428 [2021-08-12 21:46:52,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:52,593 INFO L129 PetriNetUnfolder]: 0/425 cut-off events. [2021-08-12 21:46:52,593 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:52,593 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. [2021-08-12 21:46:52,594 INFO L132 encePairwiseOnDemand]: 426/428 looper letters, 0 selfloop transitions, 1 changer transitions 0/425 dead transitions. [2021-08-12 21:46:52,594 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 425 transitions, 21297 flow [2021-08-12 21:46:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:52,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1277 transitions. [2021-08-12 21:46:52,595 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9945482866043613 [2021-08-12 21:46:52,595 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1277 transitions. [2021-08-12 21:46:52,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1277 transitions. [2021-08-12 21:46:52,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:52,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1277 transitions. [2021-08-12 21:46:52,596 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) [2021-08-12 21:46:52,596 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) [2021-08-12 21:46:52,596 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) [2021-08-12 21:46:52,596 INFO L348 CegarLoopForPetriNet]: 709 programPoint places, 1 predicate places. [2021-08-12 21:46:52,597 INFO L482 AbstractCegarLoop]: Abstraction has has 710 places, 425 transitions, 21297 flow [2021-08-12 21:46:52,597 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) [2021-08-12 21:46:52,597 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:52,597 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] [2021-08-12 21:46:52,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280 [2021-08-12 21:46:52,597 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:52,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:52,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1556402445, now seen corresponding path program 1 times [2021-08-12 21:46:52,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:52,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141109993] [2021-08-12 21:46:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:52,658 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:52,661 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:52,700 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:52,701 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:52,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281 [2021-08-12 21:46:52,701 WARN L235 ceAbstractionStarter]: 141 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:52,701 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 142 thread instances. [2021-08-12 21:46:52,804 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:52,804 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:52,805 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:52,805 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:52,805 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:52,805 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:52,805 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:52,805 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:52,805 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:52,805 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:52,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 716 places, 431 transitions, 21594 flow [2021-08-12 21:46:53,497 INFO L129 PetriNetUnfolder]: 0/857 cut-off events. [2021-08-12 21:46:53,497 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:53,497 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. [2021-08-12 21:46:53,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 716 places, 431 transitions, 21594 flow [2021-08-12 21:46:53,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 714 places, 429 transitions, 21590 flow [2021-08-12 21:46:53,505 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:53,505 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:53,505 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:53,505 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:53,505 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:53,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:53,506 INFO L82 PathProgramCache]: Analyzing trace with hash 998467, now seen corresponding path program 1 times [2021-08-12 21:46:53,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:53,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484800850] [2021-08-12 21:46:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:53,572 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:53,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:53,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:53,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484800850] [2021-08-12 21:46:53,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484800850] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:53,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:53,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:53,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482454324] [2021-08-12 21:46:53,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:53,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:53,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:53,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:53,575 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 428 out of 431 [2021-08-12 21:46:53,576 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) [2021-08-12 21:46:53,576 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:53,576 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 428 of 431 [2021-08-12 21:46:53,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:54,216 INFO L129 PetriNetUnfolder]: 0/428 cut-off events. [2021-08-12 21:46:54,216 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:54,216 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. [2021-08-12 21:46:54,217 INFO L132 encePairwiseOnDemand]: 429/431 looper letters, 0 selfloop transitions, 1 changer transitions 0/428 dead transitions. [2021-08-12 21:46:54,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 428 transitions, 21590 flow [2021-08-12 21:46:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1286 transitions. [2021-08-12 21:46:54,218 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9945862335653519 [2021-08-12 21:46:54,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1286 transitions. [2021-08-12 21:46:54,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1286 transitions. [2021-08-12 21:46:54,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:54,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1286 transitions. [2021-08-12 21:46:54,219 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) [2021-08-12 21:46:54,219 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) [2021-08-12 21:46:54,219 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) [2021-08-12 21:46:54,219 INFO L348 CegarLoopForPetriNet]: 714 programPoint places, 1 predicate places. [2021-08-12 21:46:54,219 INFO L482 AbstractCegarLoop]: Abstraction has has 715 places, 428 transitions, 21590 flow [2021-08-12 21:46:54,220 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) [2021-08-12 21:46:54,220 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:54,220 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] [2021-08-12 21:46:54,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282 [2021-08-12 21:46:54,220 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:54,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1613715517, now seen corresponding path program 1 times [2021-08-12 21:46:54,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:54,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477452273] [2021-08-12 21:46:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:54,282 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:54,284 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:54,324 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:54,324 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:54,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283 [2021-08-12 21:46:54,324 WARN L235 ceAbstractionStarter]: 142 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:54,324 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 143 thread instances. [2021-08-12 21:46:54,435 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:54,435 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:54,436 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:54,436 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:54,436 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:54,436 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:54,436 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:54,436 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:54,436 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:54,436 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:54,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 721 places, 434 transitions, 21889 flow [2021-08-12 21:46:55,131 INFO L129 PetriNetUnfolder]: 0/863 cut-off events. [2021-08-12 21:46:55,132 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:55,132 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. [2021-08-12 21:46:55,132 INFO L82 GeneralOperation]: Start removeDead. Operand has 721 places, 434 transitions, 21889 flow [2021-08-12 21:46:55,139 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 719 places, 432 transitions, 21885 flow [2021-08-12 21:46:55,140 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:55,140 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:55,140 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:55,140 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:55,140 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:55,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:55,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1012355, now seen corresponding path program 1 times [2021-08-12 21:46:55,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:55,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397665746] [2021-08-12 21:46:55,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:55,204 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:55,204 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:55,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:55,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397665746] [2021-08-12 21:46:55,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397665746] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:55,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:55,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:55,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48859986] [2021-08-12 21:46:55,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:55,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:55,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:55,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:55,207 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 431 out of 434 [2021-08-12 21:46:55,208 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) [2021-08-12 21:46:55,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:55,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 431 of 434 [2021-08-12 21:46:55,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:55,698 INFO L129 PetriNetUnfolder]: 0/431 cut-off events. [2021-08-12 21:46:55,698 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:55,698 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. [2021-08-12 21:46:55,699 INFO L132 encePairwiseOnDemand]: 432/434 looper letters, 0 selfloop transitions, 1 changer transitions 0/431 dead transitions. [2021-08-12 21:46:55,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 431 transitions, 21885 flow [2021-08-12 21:46:55,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:55,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:55,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1295 transitions. [2021-08-12 21:46:55,700 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9946236559139785 [2021-08-12 21:46:55,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1295 transitions. [2021-08-12 21:46:55,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1295 transitions. [2021-08-12 21:46:55,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:55,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1295 transitions. [2021-08-12 21:46:55,701 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) [2021-08-12 21:46:55,701 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) [2021-08-12 21:46:55,701 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) [2021-08-12 21:46:55,701 INFO L348 CegarLoopForPetriNet]: 719 programPoint places, 1 predicate places. [2021-08-12 21:46:55,702 INFO L482 AbstractCegarLoop]: Abstraction has has 720 places, 431 transitions, 21885 flow [2021-08-12 21:46:55,702 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) [2021-08-12 21:46:55,702 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:55,702 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] [2021-08-12 21:46:55,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284 [2021-08-12 21:46:55,702 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:55,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1862749517, now seen corresponding path program 1 times [2021-08-12 21:46:55,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:55,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713623467] [2021-08-12 21:46:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:55,765 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:55,767 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:55,807 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:55,808 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:55,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285 [2021-08-12 21:46:55,808 WARN L235 ceAbstractionStarter]: 143 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:55,808 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 144 thread instances. [2021-08-12 21:46:55,916 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:55,916 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:55,917 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:55,917 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:55,917 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:55,917 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:55,917 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:55,917 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:55,917 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:55,917 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:55,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 726 places, 437 transitions, 22186 flow [2021-08-12 21:46:56,510 INFO L129 PetriNetUnfolder]: 0/869 cut-off events. [2021-08-12 21:46:56,510 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:56,510 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. [2021-08-12 21:46:56,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 726 places, 437 transitions, 22186 flow [2021-08-12 21:46:56,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 724 places, 435 transitions, 22182 flow [2021-08-12 21:46:56,518 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:56,518 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:56,518 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:56,518 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:56,518 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:56,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:56,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1026339, now seen corresponding path program 1 times [2021-08-12 21:46:56,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:56,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548661221] [2021-08-12 21:46:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:56,580 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:56,580 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:56,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:56,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548661221] [2021-08-12 21:46:56,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548661221] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:56,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:56,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:56,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107908345] [2021-08-12 21:46:56,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:56,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:56,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:56,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:56,583 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 434 out of 437 [2021-08-12 21:46:56,584 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) [2021-08-12 21:46:56,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:56,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 434 of 437 [2021-08-12 21:46:56,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:57,224 INFO L129 PetriNetUnfolder]: 0/434 cut-off events. [2021-08-12 21:46:57,224 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:57,225 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. [2021-08-12 21:46:57,226 INFO L132 encePairwiseOnDemand]: 435/437 looper letters, 0 selfloop transitions, 1 changer transitions 0/434 dead transitions. [2021-08-12 21:46:57,226 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 725 places, 434 transitions, 22182 flow [2021-08-12 21:46:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:57,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1304 transitions. [2021-08-12 21:46:57,226 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9946605644546148 [2021-08-12 21:46:57,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1304 transitions. [2021-08-12 21:46:57,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1304 transitions. [2021-08-12 21:46:57,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:57,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1304 transitions. [2021-08-12 21:46:57,227 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) [2021-08-12 21:46:57,228 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) [2021-08-12 21:46:57,228 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) [2021-08-12 21:46:57,228 INFO L348 CegarLoopForPetriNet]: 724 programPoint places, 1 predicate places. [2021-08-12 21:46:57,228 INFO L482 AbstractCegarLoop]: Abstraction has has 725 places, 434 transitions, 22182 flow [2021-08-12 21:46:57,228 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) [2021-08-12 21:46:57,228 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:57,228 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] [2021-08-12 21:46:57,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286 [2021-08-12 21:46:57,228 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:57,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1105081344, now seen corresponding path program 1 times [2021-08-12 21:46:57,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:57,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139594090] [2021-08-12 21:46:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:57,292 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:57,294 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:57,336 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:57,336 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:57,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287 [2021-08-12 21:46:57,337 WARN L235 ceAbstractionStarter]: 144 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:57,337 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 145 thread instances. [2021-08-12 21:46:57,442 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:57,443 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:57,443 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:57,443 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:57,443 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:57,443 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:57,443 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:57,443 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:57,443 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:57,443 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:57,448 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 731 places, 440 transitions, 22485 flow [2021-08-12 21:46:58,192 INFO L129 PetriNetUnfolder]: 0/875 cut-off events. [2021-08-12 21:46:58,192 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:58,193 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. [2021-08-12 21:46:58,193 INFO L82 GeneralOperation]: Start removeDead. Operand has 731 places, 440 transitions, 22485 flow [2021-08-12 21:46:58,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 729 places, 438 transitions, 22481 flow [2021-08-12 21:46:58,201 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:46:58,201 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:58,201 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:58,201 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:58,201 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:58,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:58,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1040419, now seen corresponding path program 1 times [2021-08-12 21:46:58,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:58,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072567616] [2021-08-12 21:46:58,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:58,266 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:58,267 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:58,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:58,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072567616] [2021-08-12 21:46:58,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072567616] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:58,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:58,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:58,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384356123] [2021-08-12 21:46:58,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:58,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:58,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:58,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:58,271 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 437 out of 440 [2021-08-12 21:46:58,271 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) [2021-08-12 21:46:58,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:58,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 437 of 440 [2021-08-12 21:46:58,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:46:58,999 INFO L129 PetriNetUnfolder]: 0/437 cut-off events. [2021-08-12 21:46:58,999 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:59,000 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. [2021-08-12 21:46:59,001 INFO L132 encePairwiseOnDemand]: 438/440 looper letters, 0 selfloop transitions, 1 changer transitions 0/437 dead transitions. [2021-08-12 21:46:59,001 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 437 transitions, 22481 flow [2021-08-12 21:46:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:46:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:46:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1313 transitions. [2021-08-12 21:46:59,002 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9946969696969697 [2021-08-12 21:46:59,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1313 transitions. [2021-08-12 21:46:59,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1313 transitions. [2021-08-12 21:46:59,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:46:59,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1313 transitions. [2021-08-12 21:46:59,003 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) [2021-08-12 21:46:59,004 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) [2021-08-12 21:46:59,004 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) [2021-08-12 21:46:59,004 INFO L348 CegarLoopForPetriNet]: 729 programPoint places, 1 predicate places. [2021-08-12 21:46:59,004 INFO L482 AbstractCegarLoop]: Abstraction has has 730 places, 437 transitions, 22481 flow [2021-08-12 21:46:59,004 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) [2021-08-12 21:46:59,004 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:59,004 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] [2021-08-12 21:46:59,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288 [2021-08-12 21:46:59,004 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:59,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:59,005 INFO L82 PathProgramCache]: Analyzing trace with hash -628799271, now seen corresponding path program 1 times [2021-08-12 21:46:59,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:59,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038930786] [2021-08-12 21:46:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:59,072 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:46:59,074 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:46:59,116 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:46:59,116 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:46:59,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289 [2021-08-12 21:46:59,116 WARN L235 ceAbstractionStarter]: 145 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:46:59,116 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 146 thread instances. [2021-08-12 21:46:59,227 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:46:59,228 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:46:59,228 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:46:59,228 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:46:59,228 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:46:59,228 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:46:59,228 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:46:59,228 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:46:59,228 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:46:59,228 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:46:59,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 736 places, 443 transitions, 22786 flow [2021-08-12 21:46:59,921 INFO L129 PetriNetUnfolder]: 0/881 cut-off events. [2021-08-12 21:46:59,921 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:59,921 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. [2021-08-12 21:46:59,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 736 places, 443 transitions, 22786 flow [2021-08-12 21:46:59,929 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 734 places, 441 transitions, 22782 flow [2021-08-12 21:46:59,930 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:46:59,930 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:46:59,930 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:46:59,930 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:46:59,930 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:46:59,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:46:59,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1054595, now seen corresponding path program 1 times [2021-08-12 21:46:59,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:46:59,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393178163] [2021-08-12 21:46:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:46:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:46:59,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:46:59,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:46:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:46:59,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:46:59,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393178163] [2021-08-12 21:46:59,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393178163] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:46:59,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:46:59,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:46:59,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91218695] [2021-08-12 21:46:59,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:46:59,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:46:59,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:46:59,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:46:59,999 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 440 out of 443 [2021-08-12 21:46:59,999 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) [2021-08-12 21:46:59,999 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:46:59,999 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 440 of 443 [2021-08-12 21:46:59,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:00,569 INFO L129 PetriNetUnfolder]: 0/440 cut-off events. [2021-08-12 21:47:00,570 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:00,570 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. [2021-08-12 21:47:00,571 INFO L132 encePairwiseOnDemand]: 441/443 looper letters, 0 selfloop transitions, 1 changer transitions 0/440 dead transitions. [2021-08-12 21:47:00,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 440 transitions, 22782 flow [2021-08-12 21:47:00,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1322 transitions. [2021-08-12 21:47:00,572 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9947328818660647 [2021-08-12 21:47:00,572 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1322 transitions. [2021-08-12 21:47:00,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1322 transitions. [2021-08-12 21:47:00,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:00,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1322 transitions. [2021-08-12 21:47:00,573 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) [2021-08-12 21:47:00,574 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) [2021-08-12 21:47:00,574 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) [2021-08-12 21:47:00,574 INFO L348 CegarLoopForPetriNet]: 734 programPoint places, 1 predicate places. [2021-08-12 21:47:00,574 INFO L482 AbstractCegarLoop]: Abstraction has has 735 places, 440 transitions, 22782 flow [2021-08-12 21:47:00,574 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) [2021-08-12 21:47:00,574 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:00,574 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] [2021-08-12 21:47:00,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290 [2021-08-12 21:47:00,574 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:00,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1333894269, now seen corresponding path program 1 times [2021-08-12 21:47:00,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:00,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256949720] [2021-08-12 21:47:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:00,639 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:00,642 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:00,685 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:00,686 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:00,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291 [2021-08-12 21:47:00,686 WARN L235 ceAbstractionStarter]: 146 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:00,686 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 147 thread instances. [2021-08-12 21:47:00,797 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:00,798 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:00,798 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:00,798 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:00,798 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:00,798 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:00,798 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:00,798 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:00,798 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:00,798 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:00,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 741 places, 446 transitions, 23089 flow [2021-08-12 21:47:01,558 INFO L129 PetriNetUnfolder]: 0/887 cut-off events. [2021-08-12 21:47:01,559 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:01,559 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. [2021-08-12 21:47:01,559 INFO L82 GeneralOperation]: Start removeDead. Operand has 741 places, 446 transitions, 23089 flow [2021-08-12 21:47:01,566 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 739 places, 444 transitions, 23085 flow [2021-08-12 21:47:01,567 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:01,567 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:01,567 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:01,567 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:01,567 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:01,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1068867, now seen corresponding path program 1 times [2021-08-12 21:47:01,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:01,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949163261] [2021-08-12 21:47:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:01,634 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:01,634 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:01,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:01,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949163261] [2021-08-12 21:47:01,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949163261] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:01,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:01,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:01,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877367230] [2021-08-12 21:47:01,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:01,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:01,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:01,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:01,637 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 443 out of 446 [2021-08-12 21:47:01,637 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) [2021-08-12 21:47:01,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:01,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 443 of 446 [2021-08-12 21:47:01,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:02,173 INFO L129 PetriNetUnfolder]: 0/443 cut-off events. [2021-08-12 21:47:02,173 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:02,174 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. [2021-08-12 21:47:02,175 INFO L132 encePairwiseOnDemand]: 444/446 looper letters, 0 selfloop transitions, 1 changer transitions 0/443 dead transitions. [2021-08-12 21:47:02,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 443 transitions, 23085 flow [2021-08-12 21:47:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1331 transitions. [2021-08-12 21:47:02,176 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9947683109118086 [2021-08-12 21:47:02,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1331 transitions. [2021-08-12 21:47:02,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1331 transitions. [2021-08-12 21:47:02,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:02,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1331 transitions. [2021-08-12 21:47:02,177 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) [2021-08-12 21:47:02,177 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) [2021-08-12 21:47:02,177 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) [2021-08-12 21:47:02,177 INFO L348 CegarLoopForPetriNet]: 739 programPoint places, 1 predicate places. [2021-08-12 21:47:02,177 INFO L482 AbstractCegarLoop]: Abstraction has has 740 places, 443 transitions, 23085 flow [2021-08-12 21:47:02,178 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) [2021-08-12 21:47:02,178 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:02,178 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] [2021-08-12 21:47:02,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292 [2021-08-12 21:47:02,178 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:02,178 INFO L82 PathProgramCache]: Analyzing trace with hash 333096753, now seen corresponding path program 1 times [2021-08-12 21:47:02,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:02,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529715233] [2021-08-12 21:47:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:02,235 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:02,237 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:02,281 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:02,281 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:02,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293 [2021-08-12 21:47:02,281 WARN L235 ceAbstractionStarter]: 147 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:02,282 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 148 thread instances. [2021-08-12 21:47:02,411 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:02,411 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:02,412 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:02,412 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:02,412 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:02,412 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:02,412 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:02,412 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:02,412 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:02,412 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:02,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 746 places, 449 transitions, 23394 flow [2021-08-12 21:47:03,099 INFO L129 PetriNetUnfolder]: 0/893 cut-off events. [2021-08-12 21:47:03,100 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:03,100 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. [2021-08-12 21:47:03,100 INFO L82 GeneralOperation]: Start removeDead. Operand has 746 places, 449 transitions, 23394 flow [2021-08-12 21:47:03,107 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 744 places, 447 transitions, 23390 flow [2021-08-12 21:47:03,108 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:47:03,108 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:03,108 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:03,108 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:03,108 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:03,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:03,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1083235, now seen corresponding path program 1 times [2021-08-12 21:47:03,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:03,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495105732] [2021-08-12 21:47:03,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:03,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:03,364 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:03,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:03,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495105732] [2021-08-12 21:47:03,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495105732] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:03,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:03,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:03,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047328285] [2021-08-12 21:47:03,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:03,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:03,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:03,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:03,367 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 446 out of 449 [2021-08-12 21:47:03,368 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) [2021-08-12 21:47:03,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:03,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 446 of 449 [2021-08-12 21:47:03,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:03,735 INFO L129 PetriNetUnfolder]: 0/446 cut-off events. [2021-08-12 21:47:03,735 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:03,736 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. [2021-08-12 21:47:03,737 INFO L132 encePairwiseOnDemand]: 447/449 looper letters, 0 selfloop transitions, 1 changer transitions 0/446 dead transitions. [2021-08-12 21:47:03,737 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 446 transitions, 23390 flow [2021-08-12 21:47:03,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1340 transitions. [2021-08-12 21:47:03,738 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9948032665181886 [2021-08-12 21:47:03,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1340 transitions. [2021-08-12 21:47:03,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1340 transitions. [2021-08-12 21:47:03,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:03,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1340 transitions. [2021-08-12 21:47:03,739 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) [2021-08-12 21:47:03,739 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) [2021-08-12 21:47:03,739 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) [2021-08-12 21:47:03,739 INFO L348 CegarLoopForPetriNet]: 744 programPoint places, 1 predicate places. [2021-08-12 21:47:03,739 INFO L482 AbstractCegarLoop]: Abstraction has has 745 places, 446 transitions, 23390 flow [2021-08-12 21:47:03,740 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) [2021-08-12 21:47:03,740 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:03,740 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] [2021-08-12 21:47:03,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294 [2021-08-12 21:47:03,740 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:03,740 INFO L82 PathProgramCache]: Analyzing trace with hash 361503558, now seen corresponding path program 1 times [2021-08-12 21:47:03,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:03,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300262753] [2021-08-12 21:47:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:03,809 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:03,813 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:03,888 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:03,888 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:03,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295 [2021-08-12 21:47:03,888 WARN L235 ceAbstractionStarter]: 148 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:03,888 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 149 thread instances. [2021-08-12 21:47:04,348 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:04,348 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:04,349 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:04,349 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:04,349 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:04,349 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:04,349 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:04,349 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:04,349 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:04,349 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:04,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 751 places, 452 transitions, 23701 flow [2021-08-12 21:47:04,824 INFO L129 PetriNetUnfolder]: 0/899 cut-off events. [2021-08-12 21:47:04,824 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:04,825 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. [2021-08-12 21:47:04,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 751 places, 452 transitions, 23701 flow [2021-08-12 21:47:04,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 749 places, 450 transitions, 23697 flow [2021-08-12 21:47:04,833 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:04,833 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:04,833 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:04,833 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:04,833 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:04,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:04,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1097699, now seen corresponding path program 1 times [2021-08-12 21:47:04,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:04,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681807845] [2021-08-12 21:47:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:05,058 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:05,058 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:05,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:05,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681807845] [2021-08-12 21:47:05,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681807845] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:05,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:05,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:05,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501159937] [2021-08-12 21:47:05,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:05,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:05,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:05,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:05,061 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 449 out of 452 [2021-08-12 21:47:05,061 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) [2021-08-12 21:47:05,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:05,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 449 of 452 [2021-08-12 21:47:05,062 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:05,437 INFO L129 PetriNetUnfolder]: 0/449 cut-off events. [2021-08-12 21:47:05,437 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:05,437 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. [2021-08-12 21:47:05,439 INFO L132 encePairwiseOnDemand]: 450/452 looper letters, 0 selfloop transitions, 1 changer transitions 0/449 dead transitions. [2021-08-12 21:47:05,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 449 transitions, 23697 flow [2021-08-12 21:47:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:05,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:05,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1349 transitions. [2021-08-12 21:47:05,439 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9948377581120944 [2021-08-12 21:47:05,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1349 transitions. [2021-08-12 21:47:05,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1349 transitions. [2021-08-12 21:47:05,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:05,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1349 transitions. [2021-08-12 21:47:05,440 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) [2021-08-12 21:47:05,441 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) [2021-08-12 21:47:05,441 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) [2021-08-12 21:47:05,441 INFO L348 CegarLoopForPetriNet]: 749 programPoint places, 1 predicate places. [2021-08-12 21:47:05,441 INFO L482 AbstractCegarLoop]: Abstraction has has 750 places, 449 transitions, 23697 flow [2021-08-12 21:47:05,441 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) [2021-08-12 21:47:05,441 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:05,446 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] [2021-08-12 21:47:05,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296 [2021-08-12 21:47:05,447 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:05,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:05,447 INFO L82 PathProgramCache]: Analyzing trace with hash 42044373, now seen corresponding path program 1 times [2021-08-12 21:47:05,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:05,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615499047] [2021-08-12 21:47:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:05,518 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:05,520 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:05,764 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:05,764 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:05,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297 [2021-08-12 21:47:05,765 WARN L235 ceAbstractionStarter]: 149 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:05,765 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 150 thread instances. [2021-08-12 21:47:05,892 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:05,893 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:05,893 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:05,893 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:05,893 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:05,893 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:05,893 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:05,893 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:05,893 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:05,894 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:05,898 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 756 places, 455 transitions, 24010 flow [2021-08-12 21:47:06,716 INFO L129 PetriNetUnfolder]: 0/905 cut-off events. [2021-08-12 21:47:06,717 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:06,717 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. [2021-08-12 21:47:06,717 INFO L82 GeneralOperation]: Start removeDead. Operand has 756 places, 455 transitions, 24010 flow [2021-08-12 21:47:06,725 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 754 places, 453 transitions, 24006 flow [2021-08-12 21:47:06,726 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:06,726 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:06,726 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:06,726 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:06,726 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:06,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:06,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1112259, now seen corresponding path program 1 times [2021-08-12 21:47:06,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:06,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505132883] [2021-08-12 21:47:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:06,795 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:06,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:06,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:06,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505132883] [2021-08-12 21:47:06,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505132883] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:06,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:06,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:06,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977297020] [2021-08-12 21:47:06,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:06,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:06,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:06,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:06,798 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 452 out of 455 [2021-08-12 21:47:06,799 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) [2021-08-12 21:47:06,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:06,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 452 of 455 [2021-08-12 21:47:06,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:07,191 INFO L129 PetriNetUnfolder]: 0/452 cut-off events. [2021-08-12 21:47:07,191 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:07,191 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. [2021-08-12 21:47:07,193 INFO L132 encePairwiseOnDemand]: 453/455 looper letters, 0 selfloop transitions, 1 changer transitions 0/452 dead transitions. [2021-08-12 21:47:07,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 452 transitions, 24006 flow [2021-08-12 21:47:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1358 transitions. [2021-08-12 21:47:07,193 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9948717948717949 [2021-08-12 21:47:07,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1358 transitions. [2021-08-12 21:47:07,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1358 transitions. [2021-08-12 21:47:07,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:07,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1358 transitions. [2021-08-12 21:47:07,194 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) [2021-08-12 21:47:07,195 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) [2021-08-12 21:47:07,195 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) [2021-08-12 21:47:07,195 INFO L348 CegarLoopForPetriNet]: 754 programPoint places, 1 predicate places. [2021-08-12 21:47:07,195 INFO L482 AbstractCegarLoop]: Abstraction has has 755 places, 452 transitions, 24006 flow [2021-08-12 21:47:07,195 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) [2021-08-12 21:47:07,195 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:07,195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:47:07,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298 [2021-08-12 21:47:07,196 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:07,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:07,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1272205367, now seen corresponding path program 1 times [2021-08-12 21:47:07,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:07,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155696073] [2021-08-12 21:47:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:07,495 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:07,498 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:07,545 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:07,546 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:07,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299 [2021-08-12 21:47:07,546 WARN L235 ceAbstractionStarter]: 150 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:07,546 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 151 thread instances. [2021-08-12 21:47:07,660 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:07,661 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:07,661 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:07,661 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:07,661 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:07,661 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:07,661 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:07,661 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:07,661 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:07,661 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:07,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 761 places, 458 transitions, 24321 flow [2021-08-12 21:47:08,368 INFO L129 PetriNetUnfolder]: 0/911 cut-off events. [2021-08-12 21:47:08,368 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:08,368 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. [2021-08-12 21:47:08,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 761 places, 458 transitions, 24321 flow [2021-08-12 21:47:08,377 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 759 places, 456 transitions, 24317 flow [2021-08-12 21:47:08,378 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:08,378 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:08,378 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:08,378 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:08,378 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:08,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:08,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1126915, now seen corresponding path program 1 times [2021-08-12 21:47:08,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:08,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962821159] [2021-08-12 21:47:08,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:08,446 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:08,446 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:08,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:08,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962821159] [2021-08-12 21:47:08,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962821159] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:08,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:08,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:08,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564449132] [2021-08-12 21:47:08,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:08,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:08,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:08,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:08,449 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 455 out of 458 [2021-08-12 21:47:08,450 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) [2021-08-12 21:47:08,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:08,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 455 of 458 [2021-08-12 21:47:08,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:09,160 INFO L129 PetriNetUnfolder]: 0/455 cut-off events. [2021-08-12 21:47:09,160 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:09,160 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. [2021-08-12 21:47:09,162 INFO L132 encePairwiseOnDemand]: 456/458 looper letters, 0 selfloop transitions, 1 changer transitions 0/455 dead transitions. [2021-08-12 21:47:09,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 760 places, 455 transitions, 24317 flow [2021-08-12 21:47:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:09,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1367 transitions. [2021-08-12 21:47:09,163 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.99490538573508 [2021-08-12 21:47:09,163 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1367 transitions. [2021-08-12 21:47:09,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1367 transitions. [2021-08-12 21:47:09,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:09,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1367 transitions. [2021-08-12 21:47:09,164 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) [2021-08-12 21:47:09,165 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) [2021-08-12 21:47:09,165 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) [2021-08-12 21:47:09,165 INFO L348 CegarLoopForPetriNet]: 759 programPoint places, 1 predicate places. [2021-08-12 21:47:09,165 INFO L482 AbstractCegarLoop]: Abstraction has has 760 places, 455 transitions, 24317 flow [2021-08-12 21:47:09,165 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) [2021-08-12 21:47:09,165 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:09,165 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] [2021-08-12 21:47:09,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300 [2021-08-12 21:47:09,165 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:09,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:09,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1201513915, now seen corresponding path program 1 times [2021-08-12 21:47:09,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:09,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886843230] [2021-08-12 21:47:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:09,236 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:09,239 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:09,289 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:09,290 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:09,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301 [2021-08-12 21:47:09,290 WARN L235 ceAbstractionStarter]: 151 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:09,290 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 152 thread instances. [2021-08-12 21:47:09,409 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:09,410 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:09,410 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:09,410 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:09,410 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:09,410 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:09,410 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:09,410 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:09,410 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:09,410 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:09,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 766 places, 461 transitions, 24634 flow [2021-08-12 21:47:10,217 INFO L129 PetriNetUnfolder]: 0/917 cut-off events. [2021-08-12 21:47:10,219 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:10,219 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. [2021-08-12 21:47:10,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 766 places, 461 transitions, 24634 flow [2021-08-12 21:47:10,227 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 764 places, 459 transitions, 24630 flow [2021-08-12 21:47:10,228 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:47:10,228 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:10,228 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:10,228 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:10,228 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:10,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:10,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1141667, now seen corresponding path program 1 times [2021-08-12 21:47:10,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:10,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776609864] [2021-08-12 21:47:10,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:10,295 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:10,295 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:10,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:10,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776609864] [2021-08-12 21:47:10,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776609864] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:10,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:10,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:10,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353945265] [2021-08-12 21:47:10,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:10,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:10,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:10,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:10,298 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 458 out of 461 [2021-08-12 21:47:10,298 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) [2021-08-12 21:47:10,298 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:10,298 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 458 of 461 [2021-08-12 21:47:10,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:11,037 INFO L129 PetriNetUnfolder]: 0/458 cut-off events. [2021-08-12 21:47:11,037 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:11,037 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. [2021-08-12 21:47:11,039 INFO L132 encePairwiseOnDemand]: 459/461 looper letters, 0 selfloop transitions, 1 changer transitions 0/458 dead transitions. [2021-08-12 21:47:11,039 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 458 transitions, 24630 flow [2021-08-12 21:47:11,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:11,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:11,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1376 transitions. [2021-08-12 21:47:11,040 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9949385394070861 [2021-08-12 21:47:11,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1376 transitions. [2021-08-12 21:47:11,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1376 transitions. [2021-08-12 21:47:11,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:11,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1376 transitions. [2021-08-12 21:47:11,041 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) [2021-08-12 21:47:11,041 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) [2021-08-12 21:47:11,041 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) [2021-08-12 21:47:11,041 INFO L348 CegarLoopForPetriNet]: 764 programPoint places, 1 predicate places. [2021-08-12 21:47:11,041 INFO L482 AbstractCegarLoop]: Abstraction has has 765 places, 458 transitions, 24630 flow [2021-08-12 21:47:11,042 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) [2021-08-12 21:47:11,042 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:11,042 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] [2021-08-12 21:47:11,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302 [2021-08-12 21:47:11,042 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:11,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:11,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1756914292, now seen corresponding path program 1 times [2021-08-12 21:47:11,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:11,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268995185] [2021-08-12 21:47:11,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:11,306 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:11,311 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:11,360 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:11,360 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:11,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2021-08-12 21:47:11,361 WARN L235 ceAbstractionStarter]: 152 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:11,361 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 153 thread instances. [2021-08-12 21:47:11,480 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:11,481 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:11,481 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:11,481 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:11,481 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:11,481 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:11,481 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:11,481 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:11,481 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:11,481 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:11,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 771 places, 464 transitions, 24949 flow [2021-08-12 21:47:12,256 INFO L129 PetriNetUnfolder]: 0/923 cut-off events. [2021-08-12 21:47:12,256 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:12,256 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. [2021-08-12 21:47:12,256 INFO L82 GeneralOperation]: Start removeDead. Operand has 771 places, 464 transitions, 24949 flow [2021-08-12 21:47:12,264 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 769 places, 462 transitions, 24945 flow [2021-08-12 21:47:12,264 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:47:12,264 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:12,264 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:12,265 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:12,265 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:12,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:12,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1156515, now seen corresponding path program 1 times [2021-08-12 21:47:12,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:12,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339925869] [2021-08-12 21:47:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:12,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:12,336 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:12,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:12,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339925869] [2021-08-12 21:47:12,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339925869] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:12,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:12,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:12,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685484131] [2021-08-12 21:47:12,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:12,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:12,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:12,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:12,339 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 461 out of 464 [2021-08-12 21:47:12,340 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) [2021-08-12 21:47:12,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:12,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 461 of 464 [2021-08-12 21:47:12,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:13,099 INFO L129 PetriNetUnfolder]: 0/461 cut-off events. [2021-08-12 21:47:13,099 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:13,099 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. [2021-08-12 21:47:13,100 INFO L132 encePairwiseOnDemand]: 462/464 looper letters, 0 selfloop transitions, 1 changer transitions 0/461 dead transitions. [2021-08-12 21:47:13,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 461 transitions, 24945 flow [2021-08-12 21:47:13,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1385 transitions. [2021-08-12 21:47:13,101 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9949712643678161 [2021-08-12 21:47:13,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1385 transitions. [2021-08-12 21:47:13,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1385 transitions. [2021-08-12 21:47:13,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:13,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1385 transitions. [2021-08-12 21:47:13,102 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) [2021-08-12 21:47:13,103 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) [2021-08-12 21:47:13,103 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) [2021-08-12 21:47:13,103 INFO L348 CegarLoopForPetriNet]: 769 programPoint places, 1 predicate places. [2021-08-12 21:47:13,103 INFO L482 AbstractCegarLoop]: Abstraction has has 770 places, 461 transitions, 24945 flow [2021-08-12 21:47:13,103 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) [2021-08-12 21:47:13,103 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:13,103 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:47:13,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304 [2021-08-12 21:47:13,103 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:13,103 INFO L82 PathProgramCache]: Analyzing trace with hash 593737217, now seen corresponding path program 1 times [2021-08-12 21:47:13,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:13,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285436547] [2021-08-12 21:47:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:13,189 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:13,205 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:13,255 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:13,255 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:13,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305 [2021-08-12 21:47:13,255 WARN L235 ceAbstractionStarter]: 153 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:13,255 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 154 thread instances. [2021-08-12 21:47:13,397 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:13,397 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:13,397 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:13,398 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:13,398 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:13,398 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:13,398 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:13,398 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:13,398 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:13,398 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:13,403 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 776 places, 467 transitions, 25266 flow [2021-08-12 21:47:14,204 INFO L129 PetriNetUnfolder]: 0/929 cut-off events. [2021-08-12 21:47:14,204 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:14,204 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. [2021-08-12 21:47:14,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 776 places, 467 transitions, 25266 flow [2021-08-12 21:47:14,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 774 places, 465 transitions, 25262 flow [2021-08-12 21:47:14,212 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:47:14,212 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:14,212 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:14,213 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:14,213 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:14,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:14,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1171459, now seen corresponding path program 1 times [2021-08-12 21:47:14,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:14,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683693353] [2021-08-12 21:47:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:14,270 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:14,270 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:14,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:14,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683693353] [2021-08-12 21:47:14,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683693353] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:14,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:14,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:14,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52191165] [2021-08-12 21:47:14,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:14,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:14,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:14,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:14,274 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 464 out of 467 [2021-08-12 21:47:14,274 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) [2021-08-12 21:47:14,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:14,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 464 of 467 [2021-08-12 21:47:14,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:14,861 INFO L129 PetriNetUnfolder]: 0/464 cut-off events. [2021-08-12 21:47:14,861 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:14,861 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. [2021-08-12 21:47:14,863 INFO L132 encePairwiseOnDemand]: 465/467 looper letters, 0 selfloop transitions, 1 changer transitions 0/464 dead transitions. [2021-08-12 21:47:14,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 775 places, 464 transitions, 25262 flow [2021-08-12 21:47:14,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:14,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1394 transitions. [2021-08-12 21:47:14,863 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9950035688793719 [2021-08-12 21:47:14,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1394 transitions. [2021-08-12 21:47:14,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1394 transitions. [2021-08-12 21:47:14,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:14,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1394 transitions. [2021-08-12 21:47:14,864 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) [2021-08-12 21:47:14,865 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) [2021-08-12 21:47:14,865 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) [2021-08-12 21:47:14,865 INFO L348 CegarLoopForPetriNet]: 774 programPoint places, 1 predicate places. [2021-08-12 21:47:14,865 INFO L482 AbstractCegarLoop]: Abstraction has has 775 places, 464 transitions, 25262 flow [2021-08-12 21:47:14,865 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) [2021-08-12 21:47:14,865 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:14,865 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] [2021-08-12 21:47:14,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306 [2021-08-12 21:47:14,866 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:14,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:14,866 INFO L82 PathProgramCache]: Analyzing trace with hash 792994063, now seen corresponding path program 1 times [2021-08-12 21:47:14,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:14,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090345242] [2021-08-12 21:47:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:14,930 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:14,932 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:14,979 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:14,979 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:14,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307 [2021-08-12 21:47:14,979 WARN L235 ceAbstractionStarter]: 154 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:14,979 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 155 thread instances. [2021-08-12 21:47:15,095 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:15,096 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:15,096 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:15,096 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:15,096 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:15,096 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:15,096 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:15,096 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:15,096 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:15,096 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:15,101 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 781 places, 470 transitions, 25585 flow [2021-08-12 21:47:15,792 INFO L129 PetriNetUnfolder]: 0/935 cut-off events. [2021-08-12 21:47:15,792 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:15,792 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. [2021-08-12 21:47:15,792 INFO L82 GeneralOperation]: Start removeDead. Operand has 781 places, 470 transitions, 25585 flow [2021-08-12 21:47:15,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 779 places, 468 transitions, 25581 flow [2021-08-12 21:47:15,801 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:15,801 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:15,801 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:15,801 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:15,801 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:15,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1186499, now seen corresponding path program 1 times [2021-08-12 21:47:15,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:15,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013462627] [2021-08-12 21:47:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:15,862 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:15,863 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:15,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:15,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013462627] [2021-08-12 21:47:15,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013462627] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:15,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:15,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:15,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108357913] [2021-08-12 21:47:15,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:15,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:15,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:15,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:15,866 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 467 out of 470 [2021-08-12 21:47:15,866 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) [2021-08-12 21:47:15,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:15,866 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 467 of 470 [2021-08-12 21:47:15,866 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:16,441 INFO L129 PetriNetUnfolder]: 0/467 cut-off events. [2021-08-12 21:47:16,441 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:16,441 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. [2021-08-12 21:47:16,442 INFO L132 encePairwiseOnDemand]: 468/470 looper letters, 0 selfloop transitions, 1 changer transitions 0/467 dead transitions. [2021-08-12 21:47:16,442 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 467 transitions, 25581 flow [2021-08-12 21:47:16,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:16,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1403 transitions. [2021-08-12 21:47:16,443 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9950354609929078 [2021-08-12 21:47:16,443 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1403 transitions. [2021-08-12 21:47:16,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1403 transitions. [2021-08-12 21:47:16,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:16,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1403 transitions. [2021-08-12 21:47:16,444 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) [2021-08-12 21:47:16,445 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) [2021-08-12 21:47:16,445 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) [2021-08-12 21:47:16,445 INFO L348 CegarLoopForPetriNet]: 779 programPoint places, 1 predicate places. [2021-08-12 21:47:16,445 INFO L482 AbstractCegarLoop]: Abstraction has has 780 places, 467 transitions, 25581 flow [2021-08-12 21:47:16,445 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) [2021-08-12 21:47:16,445 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:16,445 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] [2021-08-12 21:47:16,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308 [2021-08-12 21:47:16,445 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash 955941513, now seen corresponding path program 1 times [2021-08-12 21:47:16,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:16,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617465611] [2021-08-12 21:47:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:16,696 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:16,700 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:16,746 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:16,747 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:16,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309 [2021-08-12 21:47:16,747 WARN L235 ceAbstractionStarter]: 155 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:16,747 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 156 thread instances. [2021-08-12 21:47:16,864 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:16,865 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:16,865 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:16,865 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:16,865 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:16,865 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:16,865 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:16,865 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:16,865 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:16,865 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:16,871 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 786 places, 473 transitions, 25906 flow [2021-08-12 21:47:17,662 INFO L129 PetriNetUnfolder]: 0/941 cut-off events. [2021-08-12 21:47:17,662 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:17,663 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. [2021-08-12 21:47:17,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 786 places, 473 transitions, 25906 flow [2021-08-12 21:47:17,671 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 784 places, 471 transitions, 25902 flow [2021-08-12 21:47:17,672 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:17,672 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:17,672 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:17,672 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:17,673 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:17,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:17,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1201635, now seen corresponding path program 1 times [2021-08-12 21:47:17,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:17,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338354593] [2021-08-12 21:47:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:17,751 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:17,751 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:17,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:17,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338354593] [2021-08-12 21:47:17,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338354593] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:17,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:17,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:17,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433339801] [2021-08-12 21:47:17,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:17,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:17,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:17,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:17,755 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 470 out of 473 [2021-08-12 21:47:17,755 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) [2021-08-12 21:47:17,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:17,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 470 of 473 [2021-08-12 21:47:17,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:18,399 INFO L129 PetriNetUnfolder]: 0/470 cut-off events. [2021-08-12 21:47:18,399 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:18,399 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. [2021-08-12 21:47:18,401 INFO L132 encePairwiseOnDemand]: 471/473 looper letters, 0 selfloop transitions, 1 changer transitions 0/470 dead transitions. [2021-08-12 21:47:18,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 470 transitions, 25902 flow [2021-08-12 21:47:18,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1412 transitions. [2021-08-12 21:47:18,401 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9950669485553206 [2021-08-12 21:47:18,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1412 transitions. [2021-08-12 21:47:18,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1412 transitions. [2021-08-12 21:47:18,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:18,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1412 transitions. [2021-08-12 21:47:18,402 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) [2021-08-12 21:47:18,403 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) [2021-08-12 21:47:18,403 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) [2021-08-12 21:47:18,403 INFO L348 CegarLoopForPetriNet]: 784 programPoint places, 1 predicate places. [2021-08-12 21:47:18,403 INFO L482 AbstractCegarLoop]: Abstraction has has 785 places, 470 transitions, 25902 flow [2021-08-12 21:47:18,403 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) [2021-08-12 21:47:18,403 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:18,403 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] [2021-08-12 21:47:18,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310 [2021-08-12 21:47:18,404 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:18,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:18,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1183893806, now seen corresponding path program 1 times [2021-08-12 21:47:18,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:18,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883261323] [2021-08-12 21:47:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:18,481 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:18,483 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:18,537 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:18,538 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:18,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311 [2021-08-12 21:47:18,538 WARN L235 ceAbstractionStarter]: 156 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:18,538 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 157 thread instances. [2021-08-12 21:47:18,671 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:18,672 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:18,672 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:18,672 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:18,672 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:18,672 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:18,672 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:18,672 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:18,672 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:18,672 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:18,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 791 places, 476 transitions, 26229 flow [2021-08-12 21:47:19,386 INFO L129 PetriNetUnfolder]: 0/947 cut-off events. [2021-08-12 21:47:19,387 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:19,387 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. [2021-08-12 21:47:19,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 791 places, 476 transitions, 26229 flow [2021-08-12 21:47:19,395 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 789 places, 474 transitions, 26225 flow [2021-08-12 21:47:19,395 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:19,395 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:19,395 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:19,395 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:19,396 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:19,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:19,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1216867, now seen corresponding path program 1 times [2021-08-12 21:47:19,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:19,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151724323] [2021-08-12 21:47:19,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:19,477 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:19,477 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:19,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:19,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151724323] [2021-08-12 21:47:19,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151724323] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:19,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:19,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:19,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840135743] [2021-08-12 21:47:19,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:19,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:19,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:19,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:19,481 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 476 [2021-08-12 21:47:19,481 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) [2021-08-12 21:47:19,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:19,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 476 [2021-08-12 21:47:19,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:20,139 INFO L129 PetriNetUnfolder]: 0/473 cut-off events. [2021-08-12 21:47:20,140 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:20,140 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. [2021-08-12 21:47:20,141 INFO L132 encePairwiseOnDemand]: 474/476 looper letters, 0 selfloop transitions, 1 changer transitions 0/473 dead transitions. [2021-08-12 21:47:20,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 790 places, 473 transitions, 26225 flow [2021-08-12 21:47:20,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1421 transitions. [2021-08-12 21:47:20,142 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9950980392156863 [2021-08-12 21:47:20,142 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1421 transitions. [2021-08-12 21:47:20,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1421 transitions. [2021-08-12 21:47:20,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:20,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1421 transitions. [2021-08-12 21:47:20,143 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) [2021-08-12 21:47:20,143 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) [2021-08-12 21:47:20,144 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) [2021-08-12 21:47:20,144 INFO L348 CegarLoopForPetriNet]: 789 programPoint places, 1 predicate places. [2021-08-12 21:47:20,144 INFO L482 AbstractCegarLoop]: Abstraction has has 790 places, 473 transitions, 26225 flow [2021-08-12 21:47:20,144 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) [2021-08-12 21:47:20,144 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:20,144 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] [2021-08-12 21:47:20,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable312 [2021-08-12 21:47:20,144 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:20,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:20,144 INFO L82 PathProgramCache]: Analyzing trace with hash 465167197, now seen corresponding path program 1 times [2021-08-12 21:47:20,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:20,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615519760] [2021-08-12 21:47:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:20,224 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:20,227 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:20,281 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:20,281 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:20,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313 [2021-08-12 21:47:20,281 WARN L235 ceAbstractionStarter]: 157 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:20,281 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 158 thread instances. [2021-08-12 21:47:20,403 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:20,403 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:20,404 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:20,404 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:20,404 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:20,404 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:20,404 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:20,404 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:20,404 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:20,404 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:20,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 796 places, 479 transitions, 26554 flow [2021-08-12 21:47:21,138 INFO L129 PetriNetUnfolder]: 0/953 cut-off events. [2021-08-12 21:47:21,138 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:21,139 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. [2021-08-12 21:47:21,139 INFO L82 GeneralOperation]: Start removeDead. Operand has 796 places, 479 transitions, 26554 flow [2021-08-12 21:47:21,147 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 794 places, 477 transitions, 26550 flow [2021-08-12 21:47:21,147 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:47:21,148 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:21,148 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:21,148 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:21,148 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:21,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:21,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1232195, now seen corresponding path program 1 times [2021-08-12 21:47:21,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:21,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251868611] [2021-08-12 21:47:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:21,441 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:21,441 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:21,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:21,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251868611] [2021-08-12 21:47:21,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251868611] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:21,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:21,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:21,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921243991] [2021-08-12 21:47:21,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:21,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:21,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:21,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:21,444 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 479 [2021-08-12 21:47:21,445 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) [2021-08-12 21:47:21,445 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:21,445 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 479 [2021-08-12 21:47:21,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:21,890 INFO L129 PetriNetUnfolder]: 0/476 cut-off events. [2021-08-12 21:47:21,890 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:21,890 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. [2021-08-12 21:47:21,892 INFO L132 encePairwiseOnDemand]: 477/479 looper letters, 0 selfloop transitions, 1 changer transitions 0/476 dead transitions. [2021-08-12 21:47:21,892 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 795 places, 476 transitions, 26550 flow [2021-08-12 21:47:21,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:21,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:21,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1430 transitions. [2021-08-12 21:47:21,893 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9951287404314544 [2021-08-12 21:47:21,893 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1430 transitions. [2021-08-12 21:47:21,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1430 transitions. [2021-08-12 21:47:21,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:21,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1430 transitions. [2021-08-12 21:47:22,127 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) [2021-08-12 21:47:22,128 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) [2021-08-12 21:47:22,128 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) [2021-08-12 21:47:22,128 INFO L348 CegarLoopForPetriNet]: 794 programPoint places, 1 predicate places. [2021-08-12 21:47:22,128 INFO L482 AbstractCegarLoop]: Abstraction has has 795 places, 476 transitions, 26550 flow [2021-08-12 21:47:22,128 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) [2021-08-12 21:47:22,128 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:22,129 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] [2021-08-12 21:47:22,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314 [2021-08-12 21:47:22,129 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:22,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1836096341, now seen corresponding path program 1 times [2021-08-12 21:47:22,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:22,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903691931] [2021-08-12 21:47:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:22,249 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:22,252 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:22,318 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:22,318 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:22,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315 [2021-08-12 21:47:22,318 WARN L235 ceAbstractionStarter]: 158 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:22,318 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 159 thread instances. [2021-08-12 21:47:22,465 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:22,465 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:22,466 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:22,466 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:22,466 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:22,466 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:22,466 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:22,466 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:22,466 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:22,466 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:22,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 801 places, 482 transitions, 26881 flow [2021-08-12 21:47:23,295 INFO L129 PetriNetUnfolder]: 0/959 cut-off events. [2021-08-12 21:47:23,295 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:23,295 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. [2021-08-12 21:47:23,295 INFO L82 GeneralOperation]: Start removeDead. Operand has 801 places, 482 transitions, 26881 flow [2021-08-12 21:47:23,303 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 799 places, 480 transitions, 26877 flow [2021-08-12 21:47:23,304 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:23,304 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:23,304 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:23,304 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:23,304 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:23,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:23,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1247619, now seen corresponding path program 1 times [2021-08-12 21:47:23,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:23,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005592358] [2021-08-12 21:47:23,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:23,379 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:23,379 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:23,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:23,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005592358] [2021-08-12 21:47:23,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005592358] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:23,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:23,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:23,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488665895] [2021-08-12 21:47:23,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:23,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:23,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:23,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:23,382 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 479 out of 482 [2021-08-12 21:47:23,383 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) [2021-08-12 21:47:23,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:23,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 479 of 482 [2021-08-12 21:47:23,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:23,974 INFO L129 PetriNetUnfolder]: 0/479 cut-off events. [2021-08-12 21:47:23,974 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:23,974 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. [2021-08-12 21:47:23,976 INFO L132 encePairwiseOnDemand]: 480/482 looper letters, 0 selfloop transitions, 1 changer transitions 0/479 dead transitions. [2021-08-12 21:47:23,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 800 places, 479 transitions, 26877 flow [2021-08-12 21:47:23,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1439 transitions. [2021-08-12 21:47:23,976 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9951590594744122 [2021-08-12 21:47:23,976 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1439 transitions. [2021-08-12 21:47:23,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1439 transitions. [2021-08-12 21:47:23,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:23,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1439 transitions. [2021-08-12 21:47:23,977 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) [2021-08-12 21:47:23,978 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) [2021-08-12 21:47:23,978 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) [2021-08-12 21:47:23,978 INFO L348 CegarLoopForPetriNet]: 799 programPoint places, 1 predicate places. [2021-08-12 21:47:23,978 INFO L482 AbstractCegarLoop]: Abstraction has has 800 places, 479 transitions, 26877 flow [2021-08-12 21:47:23,978 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) [2021-08-12 21:47:23,978 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:23,978 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] [2021-08-12 21:47:23,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316 [2021-08-12 21:47:23,978 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:23,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:23,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1159513091, now seen corresponding path program 1 times [2021-08-12 21:47:23,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:23,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225555782] [2021-08-12 21:47:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:24,057 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:24,060 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:24,114 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:24,114 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:24,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317 [2021-08-12 21:47:24,115 WARN L235 ceAbstractionStarter]: 159 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:24,115 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 160 thread instances. [2021-08-12 21:47:24,246 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:24,247 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:24,247 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:24,247 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:24,247 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:24,247 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:24,247 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:24,247 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:24,247 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:24,247 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:24,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 806 places, 485 transitions, 27210 flow [2021-08-12 21:47:24,928 INFO L129 PetriNetUnfolder]: 0/965 cut-off events. [2021-08-12 21:47:24,928 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:24,929 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. [2021-08-12 21:47:24,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 806 places, 485 transitions, 27210 flow [2021-08-12 21:47:24,937 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 804 places, 483 transitions, 27206 flow [2021-08-12 21:47:24,938 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:47:24,938 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:24,938 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:24,938 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:24,938 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:24,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:24,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1263139, now seen corresponding path program 1 times [2021-08-12 21:47:24,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:24,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663174021] [2021-08-12 21:47:24,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:25,337 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:25,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:25,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:25,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663174021] [2021-08-12 21:47:25,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663174021] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:25,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:25,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:25,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842174740] [2021-08-12 21:47:25,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:25,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:25,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:25,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:25,341 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 482 out of 485 [2021-08-12 21:47:25,341 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) [2021-08-12 21:47:25,341 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:25,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 482 of 485 [2021-08-12 21:47:25,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:25,771 INFO L129 PetriNetUnfolder]: 0/482 cut-off events. [2021-08-12 21:47:25,771 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:25,771 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. [2021-08-12 21:47:25,772 INFO L132 encePairwiseOnDemand]: 483/485 looper letters, 0 selfloop transitions, 1 changer transitions 0/482 dead transitions. [2021-08-12 21:47:25,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 805 places, 482 transitions, 27206 flow [2021-08-12 21:47:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1448 transitions. [2021-08-12 21:47:25,773 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9951890034364261 [2021-08-12 21:47:25,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1448 transitions. [2021-08-12 21:47:25,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1448 transitions. [2021-08-12 21:47:25,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:25,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1448 transitions. [2021-08-12 21:47:25,774 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) [2021-08-12 21:47:25,775 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) [2021-08-12 21:47:25,775 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) [2021-08-12 21:47:25,775 INFO L348 CegarLoopForPetriNet]: 804 programPoint places, 1 predicate places. [2021-08-12 21:47:25,775 INFO L482 AbstractCegarLoop]: Abstraction has has 805 places, 482 transitions, 27206 flow [2021-08-12 21:47:25,775 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) [2021-08-12 21:47:25,775 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:25,775 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] [2021-08-12 21:47:25,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318 [2021-08-12 21:47:25,775 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:25,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:25,775 INFO L82 PathProgramCache]: Analyzing trace with hash -256259304, now seen corresponding path program 1 times [2021-08-12 21:47:25,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:25,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016104482] [2021-08-12 21:47:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:26,233 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:26,236 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:26,291 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:26,291 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:26,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319 [2021-08-12 21:47:26,294 WARN L235 ceAbstractionStarter]: 160 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:26,294 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 161 thread instances. [2021-08-12 21:47:26,429 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:26,429 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:26,430 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:26,430 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:26,430 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:26,430 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:26,430 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:26,430 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:26,430 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:26,430 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:26,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 811 places, 488 transitions, 27541 flow [2021-08-12 21:47:27,332 INFO L129 PetriNetUnfolder]: 0/971 cut-off events. [2021-08-12 21:47:27,332 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:27,332 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. [2021-08-12 21:47:27,332 INFO L82 GeneralOperation]: Start removeDead. Operand has 811 places, 488 transitions, 27541 flow [2021-08-12 21:47:27,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 809 places, 486 transitions, 27537 flow [2021-08-12 21:47:27,341 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:27,341 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:27,341 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:27,342 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:27,342 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1278755, now seen corresponding path program 1 times [2021-08-12 21:47:27,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:27,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763429794] [2021-08-12 21:47:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:27,420 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:27,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:27,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:27,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763429794] [2021-08-12 21:47:27,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763429794] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:27,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:27,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:27,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322685960] [2021-08-12 21:47:27,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:27,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:27,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:27,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:27,423 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 485 out of 488 [2021-08-12 21:47:27,424 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) [2021-08-12 21:47:27,424 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:27,424 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 485 of 488 [2021-08-12 21:47:27,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:28,273 INFO L129 PetriNetUnfolder]: 0/485 cut-off events. [2021-08-12 21:47:28,273 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:28,273 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. [2021-08-12 21:47:28,274 INFO L132 encePairwiseOnDemand]: 486/488 looper letters, 0 selfloop transitions, 1 changer transitions 0/485 dead transitions. [2021-08-12 21:47:28,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 810 places, 485 transitions, 27537 flow [2021-08-12 21:47:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1457 transitions. [2021-08-12 21:47:28,275 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9952185792349727 [2021-08-12 21:47:28,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1457 transitions. [2021-08-12 21:47:28,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1457 transitions. [2021-08-12 21:47:28,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:28,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1457 transitions. [2021-08-12 21:47:28,276 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) [2021-08-12 21:47:28,277 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) [2021-08-12 21:47:28,277 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) [2021-08-12 21:47:28,277 INFO L348 CegarLoopForPetriNet]: 809 programPoint places, 1 predicate places. [2021-08-12 21:47:28,277 INFO L482 AbstractCegarLoop]: Abstraction has has 810 places, 485 transitions, 27537 flow [2021-08-12 21:47:28,277 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) [2021-08-12 21:47:28,277 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:28,280 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] [2021-08-12 21:47:28,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320 [2021-08-12 21:47:28,289 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:28,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:28,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1811296233, now seen corresponding path program 1 times [2021-08-12 21:47:28,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:28,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185687656] [2021-08-12 21:47:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:28,680 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:28,683 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:28,800 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:28,800 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:28,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321 [2021-08-12 21:47:28,800 WARN L235 ceAbstractionStarter]: 161 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:28,800 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 162 thread instances. [2021-08-12 21:47:28,984 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:28,985 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:28,985 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:28,985 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:28,985 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:28,985 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:28,985 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:28,985 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:28,985 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:28,985 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:29,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 816 places, 491 transitions, 27874 flow [2021-08-12 21:47:30,554 INFO L129 PetriNetUnfolder]: 0/977 cut-off events. [2021-08-12 21:47:30,554 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:30,554 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. [2021-08-12 21:47:30,554 INFO L82 GeneralOperation]: Start removeDead. Operand has 816 places, 491 transitions, 27874 flow [2021-08-12 21:47:30,563 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 814 places, 489 transitions, 27870 flow [2021-08-12 21:47:30,564 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:47:30,564 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:30,564 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:30,564 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:30,564 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:30,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:30,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1294467, now seen corresponding path program 1 times [2021-08-12 21:47:30,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:30,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921410844] [2021-08-12 21:47:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:30,657 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:30,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:30,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:30,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921410844] [2021-08-12 21:47:30,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921410844] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:30,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:30,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:30,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196014920] [2021-08-12 21:47:30,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:30,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:30,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:30,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:30,661 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 488 out of 491 [2021-08-12 21:47:30,661 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) [2021-08-12 21:47:30,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:30,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 488 of 491 [2021-08-12 21:47:30,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:31,474 INFO L129 PetriNetUnfolder]: 0/488 cut-off events. [2021-08-12 21:47:31,475 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:31,475 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. [2021-08-12 21:47:31,476 INFO L132 encePairwiseOnDemand]: 489/491 looper letters, 0 selfloop transitions, 1 changer transitions 0/488 dead transitions. [2021-08-12 21:47:31,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 815 places, 488 transitions, 27870 flow [2021-08-12 21:47:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1466 transitions. [2021-08-12 21:47:31,477 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9952477936184657 [2021-08-12 21:47:31,477 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1466 transitions. [2021-08-12 21:47:31,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1466 transitions. [2021-08-12 21:47:31,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:31,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1466 transitions. [2021-08-12 21:47:31,478 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) [2021-08-12 21:47:31,479 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) [2021-08-12 21:47:31,479 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) [2021-08-12 21:47:31,479 INFO L348 CegarLoopForPetriNet]: 814 programPoint places, 1 predicate places. [2021-08-12 21:47:31,479 INFO L482 AbstractCegarLoop]: Abstraction has has 815 places, 488 transitions, 27870 flow [2021-08-12 21:47:31,479 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) [2021-08-12 21:47:31,479 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:31,479 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] [2021-08-12 21:47:31,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable322 [2021-08-12 21:47:31,479 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:31,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:31,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1879702885, now seen corresponding path program 1 times [2021-08-12 21:47:31,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:31,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102318756] [2021-08-12 21:47:31,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:31,566 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:31,568 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:31,625 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:31,625 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:31,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323 [2021-08-12 21:47:31,625 WARN L235 ceAbstractionStarter]: 162 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:31,625 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 163 thread instances. [2021-08-12 21:47:31,751 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:31,752 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:31,752 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:31,752 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:31,752 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:31,752 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:31,752 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:31,752 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:31,752 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:31,752 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:31,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 821 places, 494 transitions, 28209 flow [2021-08-12 21:47:32,688 INFO L129 PetriNetUnfolder]: 0/983 cut-off events. [2021-08-12 21:47:32,689 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:32,689 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. [2021-08-12 21:47:32,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 821 places, 494 transitions, 28209 flow [2021-08-12 21:47:32,697 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 819 places, 492 transitions, 28205 flow [2021-08-12 21:47:32,698 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:32,698 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:32,698 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:32,698 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:32,699 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:32,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:32,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1310275, now seen corresponding path program 1 times [2021-08-12 21:47:32,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:32,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533540260] [2021-08-12 21:47:32,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:33,113 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:33,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:33,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:33,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533540260] [2021-08-12 21:47:33,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533540260] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:33,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:33,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:33,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52093253] [2021-08-12 21:47:33,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:33,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:33,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:33,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:33,121 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 494 [2021-08-12 21:47:33,121 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) [2021-08-12 21:47:33,121 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:33,121 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 494 [2021-08-12 21:47:33,121 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:33,865 INFO L129 PetriNetUnfolder]: 0/491 cut-off events. [2021-08-12 21:47:33,865 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:33,865 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. [2021-08-12 21:47:33,867 INFO L132 encePairwiseOnDemand]: 492/494 looper letters, 0 selfloop transitions, 1 changer transitions 0/491 dead transitions. [2021-08-12 21:47:33,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 491 transitions, 28205 flow [2021-08-12 21:47:33,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1475 transitions. [2021-08-12 21:47:33,868 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.99527665317139 [2021-08-12 21:47:33,868 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1475 transitions. [2021-08-12 21:47:33,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1475 transitions. [2021-08-12 21:47:33,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:33,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1475 transitions. [2021-08-12 21:47:33,869 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) [2021-08-12 21:47:33,870 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) [2021-08-12 21:47:33,870 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) [2021-08-12 21:47:33,870 INFO L348 CegarLoopForPetriNet]: 819 programPoint places, 1 predicate places. [2021-08-12 21:47:33,870 INFO L482 AbstractCegarLoop]: Abstraction has has 820 places, 491 transitions, 28205 flow [2021-08-12 21:47:33,870 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) [2021-08-12 21:47:33,870 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:33,870 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] [2021-08-12 21:47:33,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324 [2021-08-12 21:47:33,871 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:33,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:33,871 INFO L82 PathProgramCache]: Analyzing trace with hash -29318495, now seen corresponding path program 1 times [2021-08-12 21:47:33,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:33,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681718854] [2021-08-12 21:47:33,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:34,006 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:34,008 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:34,068 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:34,068 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:34,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325 [2021-08-12 21:47:34,068 WARN L235 ceAbstractionStarter]: 163 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:34,068 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 164 thread instances. [2021-08-12 21:47:34,190 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:34,191 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:34,191 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:34,191 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:34,191 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:34,191 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:34,191 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:34,191 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:34,191 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:34,192 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:34,197 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 826 places, 497 transitions, 28546 flow [2021-08-12 21:47:35,052 INFO L129 PetriNetUnfolder]: 0/989 cut-off events. [2021-08-12 21:47:35,052 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:35,053 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. [2021-08-12 21:47:35,053 INFO L82 GeneralOperation]: Start removeDead. Operand has 826 places, 497 transitions, 28546 flow [2021-08-12 21:47:35,062 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 824 places, 495 transitions, 28542 flow [2021-08-12 21:47:35,063 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:35,063 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:35,063 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:35,063 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:35,063 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:35,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:35,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1326179, now seen corresponding path program 1 times [2021-08-12 21:47:35,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:35,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773201256] [2021-08-12 21:47:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:35,158 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:35,159 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:35,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:35,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773201256] [2021-08-12 21:47:35,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773201256] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:35,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:35,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:35,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949674024] [2021-08-12 21:47:35,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:35,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:35,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:35,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:35,162 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 497 [2021-08-12 21:47:35,162 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) [2021-08-12 21:47:35,162 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:35,162 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 497 [2021-08-12 21:47:35,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:35,876 INFO L129 PetriNetUnfolder]: 0/494 cut-off events. [2021-08-12 21:47:35,877 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:35,877 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. [2021-08-12 21:47:35,878 INFO L132 encePairwiseOnDemand]: 495/497 looper letters, 0 selfloop transitions, 1 changer transitions 0/494 dead transitions. [2021-08-12 21:47:35,878 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 494 transitions, 28542 flow [2021-08-12 21:47:35,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1484 transitions. [2021-08-12 21:47:35,879 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9953051643192489 [2021-08-12 21:47:35,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1484 transitions. [2021-08-12 21:47:35,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1484 transitions. [2021-08-12 21:47:35,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:35,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1484 transitions. [2021-08-12 21:47:35,880 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) [2021-08-12 21:47:35,881 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) [2021-08-12 21:47:35,881 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) [2021-08-12 21:47:35,881 INFO L348 CegarLoopForPetriNet]: 824 programPoint places, 1 predicate places. [2021-08-12 21:47:35,881 INFO L482 AbstractCegarLoop]: Abstraction has has 825 places, 494 transitions, 28542 flow [2021-08-12 21:47:35,881 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) [2021-08-12 21:47:35,881 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:35,881 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] [2021-08-12 21:47:35,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326 [2021-08-12 21:47:35,881 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:35,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:35,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1099284898, now seen corresponding path program 1 times [2021-08-12 21:47:35,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:35,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153676687] [2021-08-12 21:47:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:35,973 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:35,976 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:36,035 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:36,035 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:36,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327 [2021-08-12 21:47:36,035 WARN L235 ceAbstractionStarter]: 164 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:36,035 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 165 thread instances. [2021-08-12 21:47:36,359 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:36,359 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:36,360 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:36,360 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:36,360 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:36,360 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:36,360 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:36,360 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:36,360 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:36,360 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:36,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 831 places, 500 transitions, 28885 flow [2021-08-12 21:47:37,334 INFO L129 PetriNetUnfolder]: 0/995 cut-off events. [2021-08-12 21:47:37,335 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:37,335 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. [2021-08-12 21:47:37,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 831 places, 500 transitions, 28885 flow [2021-08-12 21:47:37,344 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 829 places, 498 transitions, 28881 flow [2021-08-12 21:47:37,345 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:47:37,345 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:37,345 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:37,345 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:37,345 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:37,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:37,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1342179, now seen corresponding path program 1 times [2021-08-12 21:47:37,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:37,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902782703] [2021-08-12 21:47:37,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:37,439 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:37,440 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:37,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:37,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902782703] [2021-08-12 21:47:37,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902782703] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:37,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:37,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:37,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766334998] [2021-08-12 21:47:37,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:37,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:37,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:37,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:37,443 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 500 [2021-08-12 21:47:37,443 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) [2021-08-12 21:47:37,443 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:37,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 500 [2021-08-12 21:47:37,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:38,192 INFO L129 PetriNetUnfolder]: 0/497 cut-off events. [2021-08-12 21:47:38,193 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:38,193 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. [2021-08-12 21:47:38,194 INFO L132 encePairwiseOnDemand]: 498/500 looper letters, 0 selfloop transitions, 1 changer transitions 0/497 dead transitions. [2021-08-12 21:47:38,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 830 places, 497 transitions, 28881 flow [2021-08-12 21:47:38,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:38,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1493 transitions. [2021-08-12 21:47:38,195 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9953333333333333 [2021-08-12 21:47:38,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1493 transitions. [2021-08-12 21:47:38,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1493 transitions. [2021-08-12 21:47:38,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:38,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1493 transitions. [2021-08-12 21:47:38,196 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) [2021-08-12 21:47:38,197 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) [2021-08-12 21:47:38,197 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) [2021-08-12 21:47:38,197 INFO L348 CegarLoopForPetriNet]: 829 programPoint places, 1 predicate places. [2021-08-12 21:47:38,197 INFO L482 AbstractCegarLoop]: Abstraction has has 830 places, 497 transitions, 28881 flow [2021-08-12 21:47:38,197 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) [2021-08-12 21:47:38,197 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:38,197 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] [2021-08-12 21:47:38,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328 [2021-08-12 21:47:38,197 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:38,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:38,197 INFO L82 PathProgramCache]: Analyzing trace with hash -932268123, now seen corresponding path program 1 times [2021-08-12 21:47:38,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:38,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842781476] [2021-08-12 21:47:38,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:38,293 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:38,295 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:38,359 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:38,360 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:38,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329 [2021-08-12 21:47:38,360 WARN L235 ceAbstractionStarter]: 165 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:38,360 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 166 thread instances. [2021-08-12 21:47:38,492 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:38,492 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:38,492 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:38,492 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:38,493 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:38,493 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:38,493 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:38,493 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:38,493 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:38,493 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:38,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 836 places, 503 transitions, 29226 flow [2021-08-12 21:47:39,312 INFO L129 PetriNetUnfolder]: 0/1001 cut-off events. [2021-08-12 21:47:39,312 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:39,312 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. [2021-08-12 21:47:39,312 INFO L82 GeneralOperation]: Start removeDead. Operand has 836 places, 503 transitions, 29226 flow [2021-08-12 21:47:39,321 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 834 places, 501 transitions, 29222 flow [2021-08-12 21:47:39,322 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:47:39,322 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:39,322 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:39,322 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:39,322 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:39,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:39,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1358275, now seen corresponding path program 1 times [2021-08-12 21:47:39,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:39,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577793802] [2021-08-12 21:47:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:39,745 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:39,745 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:39,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:39,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577793802] [2021-08-12 21:47:39,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577793802] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:39,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:39,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:39,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388035582] [2021-08-12 21:47:39,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:39,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:39,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:39,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:39,748 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 503 [2021-08-12 21:47:39,749 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) [2021-08-12 21:47:39,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:39,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 503 [2021-08-12 21:47:39,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:40,680 INFO L129 PetriNetUnfolder]: 0/500 cut-off events. [2021-08-12 21:47:40,680 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:40,680 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. [2021-08-12 21:47:40,682 INFO L132 encePairwiseOnDemand]: 501/503 looper letters, 0 selfloop transitions, 1 changer transitions 0/500 dead transitions. [2021-08-12 21:47:40,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 500 transitions, 29222 flow [2021-08-12 21:47:40,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1502 transitions. [2021-08-12 21:47:40,683 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9953611663353215 [2021-08-12 21:47:40,683 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1502 transitions. [2021-08-12 21:47:40,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1502 transitions. [2021-08-12 21:47:40,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:40,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1502 transitions. [2021-08-12 21:47:40,684 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) [2021-08-12 21:47:40,685 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) [2021-08-12 21:47:40,685 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) [2021-08-12 21:47:40,685 INFO L348 CegarLoopForPetriNet]: 834 programPoint places, 1 predicate places. [2021-08-12 21:47:40,685 INFO L482 AbstractCegarLoop]: Abstraction has has 835 places, 500 transitions, 29222 flow [2021-08-12 21:47:40,685 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) [2021-08-12 21:47:40,685 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:40,685 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] [2021-08-12 21:47:40,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330 [2021-08-12 21:47:40,685 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:40,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:40,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1538603745, now seen corresponding path program 1 times [2021-08-12 21:47:40,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:40,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622533185] [2021-08-12 21:47:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:40,762 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:40,765 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:40,823 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:40,823 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:40,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331 [2021-08-12 21:47:40,823 WARN L235 ceAbstractionStarter]: 166 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:40,823 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 167 thread instances. [2021-08-12 21:47:40,949 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:40,949 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:40,950 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:40,950 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:40,950 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:40,950 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:40,950 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:40,950 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:40,950 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:40,950 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:40,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 841 places, 506 transitions, 29569 flow [2021-08-12 21:47:41,782 INFO L129 PetriNetUnfolder]: 0/1007 cut-off events. [2021-08-12 21:47:41,783 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:41,783 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. [2021-08-12 21:47:41,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 841 places, 506 transitions, 29569 flow [2021-08-12 21:47:41,792 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 839 places, 504 transitions, 29565 flow [2021-08-12 21:47:41,792 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:47:41,792 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:41,792 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:41,792 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:41,793 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1374467, now seen corresponding path program 1 times [2021-08-12 21:47:41,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:41,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887747861] [2021-08-12 21:47:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:41,873 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:41,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:41,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:41,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887747861] [2021-08-12 21:47:41,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887747861] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:41,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:41,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:41,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479772858] [2021-08-12 21:47:41,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:41,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:41,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:41,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:41,876 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 503 out of 506 [2021-08-12 21:47:41,877 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) [2021-08-12 21:47:41,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:41,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 503 of 506 [2021-08-12 21:47:41,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:42,526 INFO L129 PetriNetUnfolder]: 0/503 cut-off events. [2021-08-12 21:47:42,526 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:42,526 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. [2021-08-12 21:47:42,528 INFO L132 encePairwiseOnDemand]: 504/506 looper letters, 0 selfloop transitions, 1 changer transitions 0/503 dead transitions. [2021-08-12 21:47:42,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 840 places, 503 transitions, 29565 flow [2021-08-12 21:47:42,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:42,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:42,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1511 transitions. [2021-08-12 21:47:42,528 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9953886693017128 [2021-08-12 21:47:42,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1511 transitions. [2021-08-12 21:47:42,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1511 transitions. [2021-08-12 21:47:42,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:42,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1511 transitions. [2021-08-12 21:47:42,529 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) [2021-08-12 21:47:42,530 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) [2021-08-12 21:47:42,530 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) [2021-08-12 21:47:42,530 INFO L348 CegarLoopForPetriNet]: 839 programPoint places, 1 predicate places. [2021-08-12 21:47:42,530 INFO L482 AbstractCegarLoop]: Abstraction has has 840 places, 503 transitions, 29565 flow [2021-08-12 21:47:42,530 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) [2021-08-12 21:47:42,530 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:42,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:47:42,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332 [2021-08-12 21:47:42,531 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:42,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:42,531 INFO L82 PathProgramCache]: Analyzing trace with hash 807064181, now seen corresponding path program 1 times [2021-08-12 21:47:42,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:42,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175380189] [2021-08-12 21:47:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:42,923 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:42,927 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:42,971 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:42,971 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:42,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333 [2021-08-12 21:47:42,971 WARN L235 ceAbstractionStarter]: 167 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:42,971 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 168 thread instances. [2021-08-12 21:47:43,098 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:43,098 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:43,098 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:43,098 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:43,098 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:43,098 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:43,098 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:43,099 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:43,099 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:43,099 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:43,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 846 places, 509 transitions, 29914 flow [2021-08-12 21:47:44,049 INFO L129 PetriNetUnfolder]: 0/1013 cut-off events. [2021-08-12 21:47:44,049 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:44,049 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. [2021-08-12 21:47:44,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 846 places, 509 transitions, 29914 flow [2021-08-12 21:47:44,058 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 844 places, 507 transitions, 29910 flow [2021-08-12 21:47:44,059 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:44,059 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:44,059 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:44,059 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:44,059 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:44,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:44,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1390755, now seen corresponding path program 1 times [2021-08-12 21:47:44,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:44,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149243405] [2021-08-12 21:47:44,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:44,140 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:44,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:44,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:44,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149243405] [2021-08-12 21:47:44,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149243405] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:44,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:44,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:44,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104784927] [2021-08-12 21:47:44,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:44,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:44,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:44,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:44,143 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 506 out of 509 [2021-08-12 21:47:44,144 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) [2021-08-12 21:47:44,144 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:44,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 506 of 509 [2021-08-12 21:47:44,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:44,911 INFO L129 PetriNetUnfolder]: 0/506 cut-off events. [2021-08-12 21:47:44,912 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:44,912 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. [2021-08-12 21:47:44,913 INFO L132 encePairwiseOnDemand]: 507/509 looper letters, 0 selfloop transitions, 1 changer transitions 0/506 dead transitions. [2021-08-12 21:47:44,913 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 845 places, 506 transitions, 29910 flow [2021-08-12 21:47:44,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1520 transitions. [2021-08-12 21:47:44,914 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9954158480681073 [2021-08-12 21:47:44,914 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1520 transitions. [2021-08-12 21:47:44,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1520 transitions. [2021-08-12 21:47:44,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:44,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1520 transitions. [2021-08-12 21:47:44,915 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) [2021-08-12 21:47:44,916 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) [2021-08-12 21:47:44,916 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) [2021-08-12 21:47:44,916 INFO L348 CegarLoopForPetriNet]: 844 programPoint places, 1 predicate places. [2021-08-12 21:47:44,916 INFO L482 AbstractCegarLoop]: Abstraction has has 845 places, 506 transitions, 29910 flow [2021-08-12 21:47:44,917 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) [2021-08-12 21:47:44,917 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:44,917 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] [2021-08-12 21:47:44,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334 [2021-08-12 21:47:44,917 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:44,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1050637476, now seen corresponding path program 1 times [2021-08-12 21:47:44,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:44,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541963771] [2021-08-12 21:47:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:44,996 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:44,999 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:45,061 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:45,062 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:45,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335 [2021-08-12 21:47:45,062 WARN L235 ceAbstractionStarter]: 168 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:45,062 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 169 thread instances. [2021-08-12 21:47:45,187 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:45,188 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:45,188 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:45,188 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:45,188 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:45,188 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:45,188 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:45,188 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:45,188 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:45,188 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:45,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 851 places, 512 transitions, 30261 flow [2021-08-12 21:47:46,434 INFO L129 PetriNetUnfolder]: 0/1019 cut-off events. [2021-08-12 21:47:46,434 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:46,434 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. [2021-08-12 21:47:46,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 851 places, 512 transitions, 30261 flow [2021-08-12 21:47:46,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 849 places, 510 transitions, 30257 flow [2021-08-12 21:47:46,445 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:46,445 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:46,445 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:46,445 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:46,445 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:46,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1407139, now seen corresponding path program 1 times [2021-08-12 21:47:46,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:46,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138152596] [2021-08-12 21:47:46,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:46,523 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:46,523 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:46,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:46,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138152596] [2021-08-12 21:47:46,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138152596] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:46,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:46,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:46,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772753955] [2021-08-12 21:47:46,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:46,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:46,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:46,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:46,526 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 509 out of 512 [2021-08-12 21:47:46,527 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) [2021-08-12 21:47:46,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:46,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 509 of 512 [2021-08-12 21:47:46,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:47,425 INFO L129 PetriNetUnfolder]: 0/509 cut-off events. [2021-08-12 21:47:47,425 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:47,425 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. [2021-08-12 21:47:47,427 INFO L132 encePairwiseOnDemand]: 510/512 looper letters, 0 selfloop transitions, 1 changer transitions 0/509 dead transitions. [2021-08-12 21:47:47,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 509 transitions, 30257 flow [2021-08-12 21:47:47,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1529 transitions. [2021-08-12 21:47:47,427 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9954427083333334 [2021-08-12 21:47:47,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1529 transitions. [2021-08-12 21:47:47,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1529 transitions. [2021-08-12 21:47:47,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:47,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1529 transitions. [2021-08-12 21:47:47,428 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) [2021-08-12 21:47:47,429 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) [2021-08-12 21:47:47,429 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) [2021-08-12 21:47:47,429 INFO L348 CegarLoopForPetriNet]: 849 programPoint places, 1 predicate places. [2021-08-12 21:47:47,429 INFO L482 AbstractCegarLoop]: Abstraction has has 850 places, 509 transitions, 30257 flow [2021-08-12 21:47:47,429 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) [2021-08-12 21:47:47,429 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:47,429 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] [2021-08-12 21:47:47,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336 [2021-08-12 21:47:47,429 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:47,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:47,430 INFO L82 PathProgramCache]: Analyzing trace with hash 727553681, now seen corresponding path program 1 times [2021-08-12 21:47:47,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:47,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262507969] [2021-08-12 21:47:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:47,514 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:47,517 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:47,577 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:47,578 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:47,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337 [2021-08-12 21:47:47,578 WARN L235 ceAbstractionStarter]: 169 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:47,578 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 170 thread instances. [2021-08-12 21:47:47,704 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:47,705 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:47,705 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:47,705 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:47,705 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:47,705 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:47,705 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:47,706 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:47,706 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:47,706 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:47,711 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 856 places, 515 transitions, 30610 flow [2021-08-12 21:47:48,671 INFO L129 PetriNetUnfolder]: 0/1025 cut-off events. [2021-08-12 21:47:48,671 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:48,671 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. [2021-08-12 21:47:48,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 856 places, 515 transitions, 30610 flow [2021-08-12 21:47:48,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 854 places, 513 transitions, 30606 flow [2021-08-12 21:47:48,685 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:48,685 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:48,685 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:48,685 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:48,685 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:48,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:48,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1423619, now seen corresponding path program 1 times [2021-08-12 21:47:48,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:48,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764170616] [2021-08-12 21:47:48,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:49,085 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:49,086 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:49,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:49,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764170616] [2021-08-12 21:47:49,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764170616] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:49,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:49,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:49,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280987840] [2021-08-12 21:47:49,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:49,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:49,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:49,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:49,089 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 512 out of 515 [2021-08-12 21:47:49,089 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) [2021-08-12 21:47:49,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:49,089 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 512 of 515 [2021-08-12 21:47:49,089 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:50,158 INFO L129 PetriNetUnfolder]: 0/512 cut-off events. [2021-08-12 21:47:50,164 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:50,164 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. [2021-08-12 21:47:50,167 INFO L132 encePairwiseOnDemand]: 513/515 looper letters, 0 selfloop transitions, 1 changer transitions 0/512 dead transitions. [2021-08-12 21:47:50,167 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 855 places, 512 transitions, 30606 flow [2021-08-12 21:47:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:50,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1538 transitions. [2021-08-12 21:47:50,169 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9954692556634305 [2021-08-12 21:47:50,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1538 transitions. [2021-08-12 21:47:50,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1538 transitions. [2021-08-12 21:47:50,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:50,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1538 transitions. [2021-08-12 21:47:50,170 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) [2021-08-12 21:47:50,171 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) [2021-08-12 21:47:50,171 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) [2021-08-12 21:47:50,171 INFO L348 CegarLoopForPetriNet]: 854 programPoint places, 1 predicate places. [2021-08-12 21:47:50,171 INFO L482 AbstractCegarLoop]: Abstraction has has 855 places, 512 transitions, 30606 flow [2021-08-12 21:47:50,172 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) [2021-08-12 21:47:50,172 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:50,172 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] [2021-08-12 21:47:50,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338 [2021-08-12 21:47:50,172 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:50,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2027214809, now seen corresponding path program 1 times [2021-08-12 21:47:50,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:50,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443255076] [2021-08-12 21:47:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:50,261 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:50,264 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:50,354 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:50,355 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:50,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339 [2021-08-12 21:47:50,355 WARN L235 ceAbstractionStarter]: 170 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:50,355 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 171 thread instances. [2021-08-12 21:47:50,532 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:50,533 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:50,533 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:50,533 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:50,533 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:50,533 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:50,533 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:50,533 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:50,534 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:50,534 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:50,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 861 places, 518 transitions, 30961 flow [2021-08-12 21:47:51,667 INFO L129 PetriNetUnfolder]: 0/1031 cut-off events. [2021-08-12 21:47:51,667 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:51,667 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. [2021-08-12 21:47:51,667 INFO L82 GeneralOperation]: Start removeDead. Operand has 861 places, 518 transitions, 30961 flow [2021-08-12 21:47:51,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 859 places, 516 transitions, 30957 flow [2021-08-12 21:47:51,679 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:51,679 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:51,679 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:51,679 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:51,679 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:51,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:51,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1440195, now seen corresponding path program 1 times [2021-08-12 21:47:51,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:51,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492286773] [2021-08-12 21:47:51,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:52,160 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:52,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:52,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:52,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492286773] [2021-08-12 21:47:52,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492286773] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:52,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:52,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:52,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668525509] [2021-08-12 21:47:52,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:52,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:52,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:52,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:52,168 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 515 out of 518 [2021-08-12 21:47:52,168 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) [2021-08-12 21:47:52,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:52,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 515 of 518 [2021-08-12 21:47:52,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:53,083 INFO L129 PetriNetUnfolder]: 0/515 cut-off events. [2021-08-12 21:47:53,083 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:53,083 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. [2021-08-12 21:47:53,085 INFO L132 encePairwiseOnDemand]: 516/518 looper letters, 0 selfloop transitions, 1 changer transitions 0/515 dead transitions. [2021-08-12 21:47:53,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 860 places, 515 transitions, 30957 flow [2021-08-12 21:47:53,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:53,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1547 transitions. [2021-08-12 21:47:53,086 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9954954954954955 [2021-08-12 21:47:53,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1547 transitions. [2021-08-12 21:47:53,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1547 transitions. [2021-08-12 21:47:53,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:53,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1547 transitions. [2021-08-12 21:47:53,088 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) [2021-08-12 21:47:53,089 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) [2021-08-12 21:47:53,089 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) [2021-08-12 21:47:53,089 INFO L348 CegarLoopForPetriNet]: 859 programPoint places, 1 predicate places. [2021-08-12 21:47:53,089 INFO L482 AbstractCegarLoop]: Abstraction has has 860 places, 515 transitions, 30957 flow [2021-08-12 21:47:53,089 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) [2021-08-12 21:47:53,089 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:53,089 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] [2021-08-12 21:47:53,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340 [2021-08-12 21:47:53,089 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:53,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:53,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1012787065, now seen corresponding path program 1 times [2021-08-12 21:47:53,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:53,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210611809] [2021-08-12 21:47:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:53,178 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:53,181 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:53,305 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:53,306 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:53,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341 [2021-08-12 21:47:53,306 WARN L235 ceAbstractionStarter]: 171 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:53,306 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 172 thread instances. [2021-08-12 21:47:53,437 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:53,437 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:53,437 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:53,437 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:53,437 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:53,437 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:53,437 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:53,437 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:53,438 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:53,438 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:53,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 866 places, 521 transitions, 31314 flow [2021-08-12 21:47:54,456 INFO L129 PetriNetUnfolder]: 0/1037 cut-off events. [2021-08-12 21:47:54,456 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:54,456 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. [2021-08-12 21:47:54,457 INFO L82 GeneralOperation]: Start removeDead. Operand has 866 places, 521 transitions, 31314 flow [2021-08-12 21:47:54,466 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 864 places, 519 transitions, 31310 flow [2021-08-12 21:47:54,467 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:47:54,467 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:54,467 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:54,467 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:54,467 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:54,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:54,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1456867, now seen corresponding path program 1 times [2021-08-12 21:47:54,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:54,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341890482] [2021-08-12 21:47:54,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:54,550 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:54,550 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:54,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:54,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341890482] [2021-08-12 21:47:54,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341890482] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:54,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:54,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:54,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722236493] [2021-08-12 21:47:54,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:54,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:54,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:54,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:54,553 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 518 out of 521 [2021-08-12 21:47:54,554 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) [2021-08-12 21:47:54,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:54,554 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 518 of 521 [2021-08-12 21:47:54,554 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:55,444 INFO L129 PetriNetUnfolder]: 0/518 cut-off events. [2021-08-12 21:47:55,444 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:55,445 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. [2021-08-12 21:47:55,446 INFO L132 encePairwiseOnDemand]: 519/521 looper letters, 0 selfloop transitions, 1 changer transitions 0/518 dead transitions. [2021-08-12 21:47:55,446 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 865 places, 518 transitions, 31310 flow [2021-08-12 21:47:55,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1556 transitions. [2021-08-12 21:47:55,447 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9955214331413947 [2021-08-12 21:47:55,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1556 transitions. [2021-08-12 21:47:55,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1556 transitions. [2021-08-12 21:47:55,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:55,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1556 transitions. [2021-08-12 21:47:55,448 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) [2021-08-12 21:47:55,449 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) [2021-08-12 21:47:55,449 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) [2021-08-12 21:47:55,449 INFO L348 CegarLoopForPetriNet]: 864 programPoint places, 1 predicate places. [2021-08-12 21:47:55,449 INFO L482 AbstractCegarLoop]: Abstraction has has 865 places, 518 transitions, 31310 flow [2021-08-12 21:47:55,449 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) [2021-08-12 21:47:55,449 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:55,449 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:47:55,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342 [2021-08-12 21:47:55,449 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:55,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:55,449 INFO L82 PathProgramCache]: Analyzing trace with hash 901009898, now seen corresponding path program 1 times [2021-08-12 21:47:55,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:55,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686305744] [2021-08-12 21:47:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:55,837 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:55,840 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:55,904 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:55,904 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:55,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343 [2021-08-12 21:47:55,904 WARN L235 ceAbstractionStarter]: 172 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:55,904 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 173 thread instances. [2021-08-12 21:47:56,041 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:56,042 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:56,042 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:56,042 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:56,042 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:56,042 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:56,042 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:56,042 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:56,042 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:56,042 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:56,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 871 places, 524 transitions, 31669 flow [2021-08-12 21:47:56,886 INFO L129 PetriNetUnfolder]: 0/1043 cut-off events. [2021-08-12 21:47:56,886 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:56,886 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. [2021-08-12 21:47:56,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 871 places, 524 transitions, 31669 flow [2021-08-12 21:47:56,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 869 places, 522 transitions, 31665 flow [2021-08-12 21:47:56,897 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:56,897 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:56,897 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:56,898 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:56,898 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:56,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:56,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1473635, now seen corresponding path program 1 times [2021-08-12 21:47:56,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:56,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396609359] [2021-08-12 21:47:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:56,980 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:56,980 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:56,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:56,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396609359] [2021-08-12 21:47:56,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396609359] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:56,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:56,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:56,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500801908] [2021-08-12 21:47:56,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:56,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:56,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:56,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:56,984 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 521 out of 524 [2021-08-12 21:47:56,984 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) [2021-08-12 21:47:56,984 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:56,984 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 521 of 524 [2021-08-12 21:47:56,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:47:57,765 INFO L129 PetriNetUnfolder]: 0/521 cut-off events. [2021-08-12 21:47:57,765 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:57,766 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. [2021-08-12 21:47:57,767 INFO L132 encePairwiseOnDemand]: 522/524 looper letters, 0 selfloop transitions, 1 changer transitions 0/521 dead transitions. [2021-08-12 21:47:57,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 870 places, 521 transitions, 31665 flow [2021-08-12 21:47:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:47:57,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:47:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1565 transitions. [2021-08-12 21:47:57,768 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9955470737913485 [2021-08-12 21:47:57,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1565 transitions. [2021-08-12 21:47:57,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1565 transitions. [2021-08-12 21:47:57,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:47:57,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1565 transitions. [2021-08-12 21:47:57,769 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) [2021-08-12 21:47:57,769 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) [2021-08-12 21:47:57,770 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) [2021-08-12 21:47:57,770 INFO L348 CegarLoopForPetriNet]: 869 programPoint places, 1 predicate places. [2021-08-12 21:47:57,770 INFO L482 AbstractCegarLoop]: Abstraction has has 870 places, 521 transitions, 31665 flow [2021-08-12 21:47:57,770 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) [2021-08-12 21:47:57,770 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:57,770 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:47:57,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344 [2021-08-12 21:47:57,770 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:57,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:57,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1726015661, now seen corresponding path program 1 times [2021-08-12 21:47:57,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:57,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796843298] [2021-08-12 21:47:57,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:58,124 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:47:58,127 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:47:58,189 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:47:58,190 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:47:58,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable345 [2021-08-12 21:47:58,190 WARN L235 ceAbstractionStarter]: 173 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:47:58,190 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 174 thread instances. [2021-08-12 21:47:58,320 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:47:58,321 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:47:58,321 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:47:58,321 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:47:58,321 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:47:58,321 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:47:58,321 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:47:58,322 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:47:58,322 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:47:58,322 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:47:58,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 876 places, 527 transitions, 32026 flow [2021-08-12 21:47:59,308 INFO L129 PetriNetUnfolder]: 0/1049 cut-off events. [2021-08-12 21:47:59,308 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:59,308 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. [2021-08-12 21:47:59,308 INFO L82 GeneralOperation]: Start removeDead. Operand has 876 places, 527 transitions, 32026 flow [2021-08-12 21:47:59,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 874 places, 525 transitions, 32022 flow [2021-08-12 21:47:59,318 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:47:59,318 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:47:59,318 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:47:59,318 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:47:59,319 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:47:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:47:59,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1490499, now seen corresponding path program 1 times [2021-08-12 21:47:59,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:47:59,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085459721] [2021-08-12 21:47:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:47:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:47:59,400 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:47:59,400 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:47:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:47:59,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:47:59,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085459721] [2021-08-12 21:47:59,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085459721] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:47:59,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:47:59,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:47:59,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611926494] [2021-08-12 21:47:59,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:47:59,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:47:59,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:47:59,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:47:59,403 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 524 out of 527 [2021-08-12 21:47:59,404 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) [2021-08-12 21:47:59,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:47:59,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 524 of 527 [2021-08-12 21:47:59,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:48:00,188 INFO L129 PetriNetUnfolder]: 0/524 cut-off events. [2021-08-12 21:48:00,189 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:00,189 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. [2021-08-12 21:48:00,191 INFO L132 encePairwiseOnDemand]: 525/527 looper letters, 0 selfloop transitions, 1 changer transitions 0/524 dead transitions. [2021-08-12 21:48:00,191 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 875 places, 524 transitions, 32022 flow [2021-08-12 21:48:00,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:48:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:48:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1574 transitions. [2021-08-12 21:48:00,192 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9955724225173941 [2021-08-12 21:48:00,192 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1574 transitions. [2021-08-12 21:48:00,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1574 transitions. [2021-08-12 21:48:00,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:48:00,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1574 transitions. [2021-08-12 21:48:00,193 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) [2021-08-12 21:48:00,194 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) [2021-08-12 21:48:00,194 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) [2021-08-12 21:48:00,194 INFO L348 CegarLoopForPetriNet]: 874 programPoint places, 1 predicate places. [2021-08-12 21:48:00,194 INFO L482 AbstractCegarLoop]: Abstraction has has 875 places, 524 transitions, 32022 flow [2021-08-12 21:48:00,194 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) [2021-08-12 21:48:00,194 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:00,194 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] [2021-08-12 21:48:00,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346 [2021-08-12 21:48:00,194 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:00,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:00,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2005881235, now seen corresponding path program 1 times [2021-08-12 21:48:00,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:00,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880743386] [2021-08-12 21:48:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:00,457 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:00,461 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:00,522 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:48:00,522 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:48:00,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347 [2021-08-12 21:48:00,523 WARN L235 ceAbstractionStarter]: 174 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:48:00,523 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 175 thread instances. [2021-08-12 21:48:00,653 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:48:00,653 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:48:00,654 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:48:00,654 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:48:00,654 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:48:00,654 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:48:00,654 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:48:00,654 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:48:00,654 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:48:00,654 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:48:00,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 881 places, 530 transitions, 32385 flow [2021-08-12 21:48:01,611 INFO L129 PetriNetUnfolder]: 0/1055 cut-off events. [2021-08-12 21:48:01,611 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:01,611 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16981 conditions, 1055 events. 0/1055 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4099 event pairs, 0 based on Foata normal form. 0/879 useless extension candidates. Maximal degree in co-relation 0. Up to 176 conditions per place. [2021-08-12 21:48:01,611 INFO L82 GeneralOperation]: Start removeDead. Operand has 881 places, 530 transitions, 32385 flow [2021-08-12 21:48:01,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 879 places, 528 transitions, 32381 flow [2021-08-12 21:48:01,621 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:48:01,621 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:01,621 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:01,621 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:48:01,622 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:01,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:01,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1507459, now seen corresponding path program 1 times [2021-08-12 21:48:01,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:01,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389245435] [2021-08-12 21:48:01,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:48:01,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:48:01,713 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:48:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:48:01,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:48:01,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389245435] [2021-08-12 21:48:01,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389245435] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:48:01,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:48:01,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:48:01,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043806858] [2021-08-12 21:48:01,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:48:01,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:48:01,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:48:01,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:48:01,716 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 527 out of 530 [2021-08-12 21:48:01,717 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 879 places, 528 transitions, 32381 flow. Second operand has 3 states, 3 states have (on average 527.6666666666666) internal successors, (1583), 3 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:01,717 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:48:01,717 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 527 of 530 [2021-08-12 21:48:01,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:48:02,509 INFO L129 PetriNetUnfolder]: 0/527 cut-off events. [2021-08-12 21:48:02,510 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:02,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16455 conditions, 527 events. 0/527 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1034 event pairs, 0 based on Foata normal form. 176/703 useless extension candidates. Maximal degree in co-relation 0. Up to 176 conditions per place. [2021-08-12 21:48:02,511 INFO L132 encePairwiseOnDemand]: 528/530 looper letters, 0 selfloop transitions, 1 changer transitions 0/527 dead transitions. [2021-08-12 21:48:02,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 527 transitions, 32381 flow [2021-08-12 21:48:02,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:48:02,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:48:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1583 transitions. [2021-08-12 21:48:02,512 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9955974842767296 [2021-08-12 21:48:02,512 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1583 transitions. [2021-08-12 21:48:02,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1583 transitions. [2021-08-12 21:48:02,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:48:02,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1583 transitions. [2021-08-12 21:48:02,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 527.6666666666666) internal successors, (1583), 3 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:02,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:02,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:02,514 INFO L348 CegarLoopForPetriNet]: 879 programPoint places, 1 predicate places. [2021-08-12 21:48:02,514 INFO L482 AbstractCegarLoop]: Abstraction has has 880 places, 527 transitions, 32381 flow [2021-08-12 21:48:02,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 527.6666666666666) internal successors, (1583), 3 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:02,514 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:02,514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:48:02,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348 [2021-08-12 21:48:02,514 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:02,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:02,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1613103699, now seen corresponding path program 1 times [2021-08-12 21:48:02,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:02,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36100967] [2021-08-12 21:48:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:02,889 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:02,892 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:02,955 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:48:02,955 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:48:02,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349 [2021-08-12 21:48:02,955 WARN L235 ceAbstractionStarter]: 175 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:48:02,955 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 176 thread instances. [2021-08-12 21:48:03,085 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:48:03,086 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:48:03,086 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:48:03,086 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:48:03,086 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:48:03,086 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:48:03,086 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:48:03,086 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:48:03,086 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:48:03,086 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:48:03,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 886 places, 533 transitions, 32746 flow [2021-08-12 21:48:04,077 INFO L129 PetriNetUnfolder]: 0/1061 cut-off events. [2021-08-12 21:48:04,077 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:04,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17166 conditions, 1061 events. 0/1061 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4139 event pairs, 0 based on Foata normal form. 0/884 useless extension candidates. Maximal degree in co-relation 0. Up to 177 conditions per place. [2021-08-12 21:48:04,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 886 places, 533 transitions, 32746 flow [2021-08-12 21:48:04,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 884 places, 531 transitions, 32742 flow [2021-08-12 21:48:04,087 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:48:04,088 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:04,088 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:04,088 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:48:04,088 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:04,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:04,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1524515, now seen corresponding path program 1 times [2021-08-12 21:48:04,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:04,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639616954] [2021-08-12 21:48:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:48:04,176 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:48:04,176 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:48:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:48:04,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:48:04,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639616954] [2021-08-12 21:48:04,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639616954] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:48:04,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:48:04,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:48:04,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858476442] [2021-08-12 21:48:04,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:48:04,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:48:04,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:48:04,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:48:04,179 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 530 out of 533 [2021-08-12 21:48:04,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 884 places, 531 transitions, 32742 flow. Second operand has 3 states, 3 states have (on average 530.6666666666666) internal successors, (1592), 3 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) [2021-08-12 21:48:04,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:48:04,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 530 of 533 [2021-08-12 21:48:04,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:48:04,963 INFO L129 PetriNetUnfolder]: 0/530 cut-off events. [2021-08-12 21:48:04,964 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:04,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16637 conditions, 530 events. 0/530 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 911 event pairs, 0 based on Foata normal form. 177/707 useless extension candidates. Maximal degree in co-relation 0. Up to 177 conditions per place. [2021-08-12 21:48:04,965 INFO L132 encePairwiseOnDemand]: 531/533 looper letters, 0 selfloop transitions, 1 changer transitions 0/530 dead transitions. [2021-08-12 21:48:04,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 885 places, 530 transitions, 32742 flow [2021-08-12 21:48:04,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:48:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:48:04,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1592 transitions. [2021-08-12 21:48:04,966 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9956222639149468 [2021-08-12 21:48:04,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1592 transitions. [2021-08-12 21:48:04,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1592 transitions. [2021-08-12 21:48:04,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:48:04,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1592 transitions. [2021-08-12 21:48:04,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 530.6666666666666) internal successors, (1592), 3 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) [2021-08-12 21:48:04,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:04,968 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:04,968 INFO L348 CegarLoopForPetriNet]: 884 programPoint places, 1 predicate places. [2021-08-12 21:48:04,968 INFO L482 AbstractCegarLoop]: Abstraction has has 885 places, 530 transitions, 32742 flow [2021-08-12 21:48:04,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 530.6666666666666) internal successors, (1592), 3 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) [2021-08-12 21:48:04,968 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:04,968 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, 1, 1] [2021-08-12 21:48:04,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350 [2021-08-12 21:48:04,968 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:04,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:04,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1629504976, now seen corresponding path program 1 times [2021-08-12 21:48:04,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:04,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772340115] [2021-08-12 21:48:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:05,210 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:05,213 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:05,281 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:48:05,294 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:48:05,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351 [2021-08-12 21:48:05,294 WARN L235 ceAbstractionStarter]: 176 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:48:05,294 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 177 thread instances. [2021-08-12 21:48:05,459 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:48:05,460 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:48:05,460 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:48:05,460 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:48:05,460 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:48:05,460 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:48:05,460 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:48:05,460 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:48:05,460 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:48:05,460 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:48:05,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 891 places, 536 transitions, 33109 flow [2021-08-12 21:48:06,489 INFO L129 PetriNetUnfolder]: 0/1067 cut-off events. [2021-08-12 21:48:06,489 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:06,489 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17352 conditions, 1067 events. 0/1067 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4139 event pairs, 0 based on Foata normal form. 0/889 useless extension candidates. Maximal degree in co-relation 0. Up to 178 conditions per place. [2021-08-12 21:48:06,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 891 places, 536 transitions, 33109 flow [2021-08-12 21:48:06,499 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 889 places, 534 transitions, 33105 flow [2021-08-12 21:48:06,500 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:48:06,500 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:06,500 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:06,500 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:48:06,500 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:06,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:06,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1541667, now seen corresponding path program 1 times [2021-08-12 21:48:06,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:06,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862788632] [2021-08-12 21:48:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:48:06,586 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:48:06,586 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:48:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:48:06,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:48:06,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862788632] [2021-08-12 21:48:06,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862788632] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:48:06,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:48:06,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:48:06,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875415361] [2021-08-12 21:48:06,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:48:06,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:48:06,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:48:06,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:48:06,589 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 533 out of 536 [2021-08-12 21:48:06,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 889 places, 534 transitions, 33105 flow. Second operand has 3 states, 3 states have (on average 533.6666666666666) internal successors, (1601), 3 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:06,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:48:06,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 533 of 536 [2021-08-12 21:48:06,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:48:07,836 INFO L129 PetriNetUnfolder]: 0/533 cut-off events. [2021-08-12 21:48:07,836 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:07,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16820 conditions, 533 events. 0/533 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1070 event pairs, 0 based on Foata normal form. 178/711 useless extension candidates. Maximal degree in co-relation 0. Up to 178 conditions per place. [2021-08-12 21:48:07,838 INFO L132 encePairwiseOnDemand]: 534/536 looper letters, 0 selfloop transitions, 1 changer transitions 0/533 dead transitions. [2021-08-12 21:48:07,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 890 places, 533 transitions, 33105 flow [2021-08-12 21:48:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:48:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:48:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1601 transitions. [2021-08-12 21:48:07,838 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9956467661691543 [2021-08-12 21:48:07,838 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1601 transitions. [2021-08-12 21:48:07,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1601 transitions. [2021-08-12 21:48:07,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:48:07,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1601 transitions. [2021-08-12 21:48:07,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 533.6666666666666) internal successors, (1601), 3 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:07,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:07,840 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:07,840 INFO L348 CegarLoopForPetriNet]: 889 programPoint places, 1 predicate places. [2021-08-12 21:48:07,840 INFO L482 AbstractCegarLoop]: Abstraction has has 890 places, 533 transitions, 33105 flow [2021-08-12 21:48:07,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 533.6666666666666) internal successors, (1601), 3 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:07,840 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:07,842 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, 1, 1, 1] [2021-08-12 21:48:07,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352 [2021-08-12 21:48:07,842 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:07,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:07,843 INFO L82 PathProgramCache]: Analyzing trace with hash 922405369, now seen corresponding path program 1 times [2021-08-12 21:48:07,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:07,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861391404] [2021-08-12 21:48:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:07,939 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:07,941 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:08,010 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:48:08,010 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:48:08,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353 [2021-08-12 21:48:08,010 WARN L235 ceAbstractionStarter]: 177 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:48:08,010 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 178 thread instances. [2021-08-12 21:48:08,143 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:48:08,143 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:48:08,144 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:48:08,144 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:48:08,144 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:48:08,144 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:48:08,144 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:48:08,144 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:48:08,144 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:48:08,144 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:48:08,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 896 places, 539 transitions, 33474 flow [2021-08-12 21:48:09,200 INFO L129 PetriNetUnfolder]: 0/1073 cut-off events. [2021-08-12 21:48:09,200 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:09,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17539 conditions, 1073 events. 0/1073 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4153 event pairs, 0 based on Foata normal form. 0/894 useless extension candidates. Maximal degree in co-relation 0. Up to 179 conditions per place. [2021-08-12 21:48:09,200 INFO L82 GeneralOperation]: Start removeDead. Operand has 896 places, 539 transitions, 33474 flow [2021-08-12 21:48:09,210 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 894 places, 537 transitions, 33470 flow [2021-08-12 21:48:09,211 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:48:09,211 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:09,211 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:09,211 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:48:09,211 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:09,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1558915, now seen corresponding path program 1 times [2021-08-12 21:48:09,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:09,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287117224] [2021-08-12 21:48:09,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:48:09,689 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:48:09,689 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:48:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:48:09,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:48:09,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287117224] [2021-08-12 21:48:09,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287117224] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:48:09,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:48:09,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:48:09,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456073483] [2021-08-12 21:48:09,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:48:09,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:48:09,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:48:09,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:48:09,692 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 536 out of 539 [2021-08-12 21:48:09,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 894 places, 537 transitions, 33470 flow. Second operand has 3 states, 3 states have (on average 536.6666666666666) internal successors, (1610), 3 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:09,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:48:09,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 536 of 539 [2021-08-12 21:48:09,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:48:10,696 INFO L129 PetriNetUnfolder]: 0/536 cut-off events. [2021-08-12 21:48:10,696 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:10,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17004 conditions, 536 events. 0/536 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 921 event pairs, 0 based on Foata normal form. 179/715 useless extension candidates. Maximal degree in co-relation 0. Up to 179 conditions per place. [2021-08-12 21:48:10,698 INFO L132 encePairwiseOnDemand]: 537/539 looper letters, 0 selfloop transitions, 1 changer transitions 0/536 dead transitions. [2021-08-12 21:48:10,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 895 places, 536 transitions, 33470 flow [2021-08-12 21:48:10,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:48:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:48:10,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1610 transitions. [2021-08-12 21:48:10,698 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9956709956709957 [2021-08-12 21:48:10,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1610 transitions. [2021-08-12 21:48:10,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1610 transitions. [2021-08-12 21:48:10,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:48:10,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1610 transitions. [2021-08-12 21:48:10,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 536.6666666666666) internal successors, (1610), 3 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:10,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:10,700 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:10,700 INFO L348 CegarLoopForPetriNet]: 894 programPoint places, 1 predicate places. [2021-08-12 21:48:10,700 INFO L482 AbstractCegarLoop]: Abstraction has has 895 places, 536 transitions, 33470 flow [2021-08-12 21:48:10,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 536.6666666666666) internal successors, (1610), 3 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:10,701 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:10,701 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, 1, 1, 1, 1] [2021-08-12 21:48:10,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354 [2021-08-12 21:48:10,701 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:10,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:10,701 INFO L82 PathProgramCache]: Analyzing trace with hash -482692685, now seen corresponding path program 1 times [2021-08-12 21:48:10,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:10,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932702430] [2021-08-12 21:48:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:10,786 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:10,793 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:10,898 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:48:10,898 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:48:10,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355 [2021-08-12 21:48:10,898 WARN L235 ceAbstractionStarter]: 178 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:48:10,898 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 179 thread instances. [2021-08-12 21:48:11,106 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:48:11,106 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:48:11,107 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:48:11,107 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:48:11,107 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:48:11,107 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:48:11,107 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:48:11,107 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:48:11,107 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:48:11,107 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:48:11,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 901 places, 542 transitions, 33841 flow [2021-08-12 21:48:12,273 INFO L129 PetriNetUnfolder]: 0/1079 cut-off events. [2021-08-12 21:48:12,273 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:12,274 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17727 conditions, 1079 events. 0/1079 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4199 event pairs, 0 based on Foata normal form. 0/899 useless extension candidates. Maximal degree in co-relation 0. Up to 180 conditions per place. [2021-08-12 21:48:12,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 901 places, 542 transitions, 33841 flow [2021-08-12 21:48:12,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 899 places, 540 transitions, 33837 flow [2021-08-12 21:48:12,284 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:48:12,284 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:12,285 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:12,285 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:48:12,285 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:12,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:12,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1576259, now seen corresponding path program 1 times [2021-08-12 21:48:12,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:12,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179764223] [2021-08-12 21:48:12,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:48:12,745 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:48:12,745 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:48:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:48:12,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:48:12,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179764223] [2021-08-12 21:48:12,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179764223] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:48:12,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:48:12,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:48:12,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896435824] [2021-08-12 21:48:12,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:48:12,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:48:12,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:48:12,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:48:12,748 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 539 out of 542 [2021-08-12 21:48:12,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 899 places, 540 transitions, 33837 flow. Second operand has 3 states, 3 states have (on average 539.6666666666666) internal successors, (1619), 3 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:12,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:48:12,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 539 of 542 [2021-08-12 21:48:12,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:48:13,727 INFO L129 PetriNetUnfolder]: 0/539 cut-off events. [2021-08-12 21:48:13,727 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:13,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17189 conditions, 539 events. 0/539 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1094 event pairs, 0 based on Foata normal form. 180/719 useless extension candidates. Maximal degree in co-relation 0. Up to 180 conditions per place. [2021-08-12 21:48:13,729 INFO L132 encePairwiseOnDemand]: 540/542 looper letters, 0 selfloop transitions, 1 changer transitions 0/539 dead transitions. [2021-08-12 21:48:13,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 900 places, 539 transitions, 33837 flow [2021-08-12 21:48:13,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:48:13,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:48:13,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1619 transitions. [2021-08-12 21:48:13,730 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9956949569495694 [2021-08-12 21:48:13,730 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1619 transitions. [2021-08-12 21:48:13,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1619 transitions. [2021-08-12 21:48:13,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:48:13,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1619 transitions. [2021-08-12 21:48:13,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 539.6666666666666) internal successors, (1619), 3 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:13,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:13,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:13,731 INFO L348 CegarLoopForPetriNet]: 899 programPoint places, 1 predicate places. [2021-08-12 21:48:13,731 INFO L482 AbstractCegarLoop]: Abstraction has has 900 places, 539 transitions, 33837 flow [2021-08-12 21:48:13,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 539.6666666666666) internal successors, (1619), 3 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:13,732 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:13,732 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, 1, 1, 1, 1, 1] [2021-08-12 21:48:13,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable356 [2021-08-12 21:48:13,732 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:13,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1170001647, now seen corresponding path program 1 times [2021-08-12 21:48:13,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:13,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852376735] [2021-08-12 21:48:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:13,824 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:13,827 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:13,911 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:48:13,911 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:48:13,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357 [2021-08-12 21:48:13,911 WARN L235 ceAbstractionStarter]: 179 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:48:13,911 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 180 thread instances. [2021-08-12 21:48:14,073 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:48:14,074 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:48:14,074 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:48:14,074 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:48:14,075 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:48:14,075 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:48:14,075 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:48:14,075 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:48:14,075 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:48:14,075 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:48:14,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 906 places, 545 transitions, 34210 flow [2021-08-12 21:48:15,394 INFO L129 PetriNetUnfolder]: 0/1085 cut-off events. [2021-08-12 21:48:15,395 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:15,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17916 conditions, 1085 events. 0/1085 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4245 event pairs, 0 based on Foata normal form. 0/904 useless extension candidates. Maximal degree in co-relation 0. Up to 181 conditions per place. [2021-08-12 21:48:15,395 INFO L82 GeneralOperation]: Start removeDead. Operand has 906 places, 545 transitions, 34210 flow [2021-08-12 21:48:15,405 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 904 places, 543 transitions, 34206 flow [2021-08-12 21:48:15,406 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-08-12 21:48:15,406 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:15,406 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:15,406 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:48:15,406 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:15,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1593699, now seen corresponding path program 1 times [2021-08-12 21:48:15,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:15,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694369847] [2021-08-12 21:48:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:48:15,505 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:48:15,505 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:48:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:48:15,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:48:15,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694369847] [2021-08-12 21:48:15,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694369847] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:48:15,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:48:15,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:48:15,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268224756] [2021-08-12 21:48:15,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:48:15,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:48:15,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:48:15,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:48:15,508 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 542 out of 545 [2021-08-12 21:48:15,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 543 transitions, 34206 flow. Second operand has 3 states, 3 states have (on average 542.6666666666666) internal successors, (1628), 3 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) [2021-08-12 21:48:15,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:48:15,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 542 of 545 [2021-08-12 21:48:15,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:48:16,327 INFO L129 PetriNetUnfolder]: 0/542 cut-off events. [2021-08-12 21:48:16,328 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:16,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17375 conditions, 542 events. 0/542 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1042 event pairs, 0 based on Foata normal form. 181/723 useless extension candidates. Maximal degree in co-relation 0. Up to 181 conditions per place. [2021-08-12 21:48:16,330 INFO L132 encePairwiseOnDemand]: 543/545 looper letters, 0 selfloop transitions, 1 changer transitions 0/542 dead transitions. [2021-08-12 21:48:16,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 905 places, 542 transitions, 34206 flow [2021-08-12 21:48:16,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:48:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:48:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1628 transitions. [2021-08-12 21:48:16,330 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.9957186544342508 [2021-08-12 21:48:16,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1628 transitions. [2021-08-12 21:48:16,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1628 transitions. [2021-08-12 21:48:16,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:48:16,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1628 transitions. [2021-08-12 21:48:16,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 542.6666666666666) internal successors, (1628), 3 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) [2021-08-12 21:48:16,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:16,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:16,332 INFO L348 CegarLoopForPetriNet]: 904 programPoint places, 1 predicate places. [2021-08-12 21:48:16,332 INFO L482 AbstractCegarLoop]: Abstraction has has 905 places, 542 transitions, 34206 flow [2021-08-12 21:48:16,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 542.6666666666666) internal successors, (1628), 3 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) [2021-08-12 21:48:16,332 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:16,333 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:48:16,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358 [2021-08-12 21:48:16,333 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:16,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:16,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1176202890, now seen corresponding path program 1 times [2021-08-12 21:48:16,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:16,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905605240] [2021-08-12 21:48:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:16,421 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:16,426 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:16,495 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:48:16,495 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:48:16,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359 [2021-08-12 21:48:16,495 WARN L235 ceAbstractionStarter]: 180 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:48:16,495 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 181 thread instances. [2021-08-12 21:48:17,028 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:48:17,029 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:48:17,029 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:48:17,029 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:48:17,029 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:48:17,029 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:48:17,029 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:48:17,029 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:48:17,029 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:48:17,029 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:48:17,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 911 places, 548 transitions, 34581 flow [2021-08-12 21:48:17,924 INFO L129 PetriNetUnfolder]: 0/1091 cut-off events. [2021-08-12 21:48:17,924 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:17,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18106 conditions, 1091 events. 0/1091 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4221 event pairs, 0 based on Foata normal form. 0/909 useless extension candidates. Maximal degree in co-relation 0. Up to 182 conditions per place. [2021-08-12 21:48:17,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 911 places, 548 transitions, 34581 flow [2021-08-12 21:48:17,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 909 places, 546 transitions, 34577 flow [2021-08-12 21:48:17,935 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:48:17,935 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:17,935 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:17,935 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:48:17,935 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:17,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1611235, now seen corresponding path program 1 times [2021-08-12 21:48:17,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:17,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450925999] [2021-08-12 21:48:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:48:18,021 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:48:18,021 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:48:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:48:18,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:48:18,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450925999] [2021-08-12 21:48:18,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450925999] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:48:18,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:48:18,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:48:18,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363938603] [2021-08-12 21:48:18,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:48:18,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:48:18,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:48:18,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:48:18,024 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 545 out of 548 [2021-08-12 21:48:18,025 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 909 places, 546 transitions, 34577 flow. Second operand has 3 states, 3 states have (on average 545.6666666666666) internal successors, (1637), 3 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:18,025 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:48:18,025 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 545 of 548 [2021-08-12 21:48:18,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-12 21:48:18,922 INFO L129 PetriNetUnfolder]: 0/545 cut-off events. [2021-08-12 21:48:18,922 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:18,922 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17562 conditions, 545 events. 0/545 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1089 event pairs, 0 based on Foata normal form. 182/727 useless extension candidates. Maximal degree in co-relation 0. Up to 182 conditions per place. [2021-08-12 21:48:18,923 INFO L132 encePairwiseOnDemand]: 546/548 looper letters, 0 selfloop transitions, 1 changer transitions 0/545 dead transitions. [2021-08-12 21:48:18,923 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 910 places, 545 transitions, 34577 flow [2021-08-12 21:48:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 21:48:18,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-12 21:48:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1637 transitions. [2021-08-12 21:48:18,924 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.995742092457421 [2021-08-12 21:48:18,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1637 transitions. [2021-08-12 21:48:18,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1637 transitions. [2021-08-12 21:48:18,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-12 21:48:18,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1637 transitions. [2021-08-12 21:48:18,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 545.6666666666666) internal successors, (1637), 3 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:18,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:18,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:18,926 INFO L348 CegarLoopForPetriNet]: 909 programPoint places, 1 predicate places. [2021-08-12 21:48:18,926 INFO L482 AbstractCegarLoop]: Abstraction has has 910 places, 545 transitions, 34577 flow [2021-08-12 21:48:18,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 545.6666666666666) internal successors, (1637), 3 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:18,926 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:18,926 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 21:48:18,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360 [2021-08-12 21:48:18,926 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:18,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:18,927 INFO L82 PathProgramCache]: Analyzing trace with hash -745449867, now seen corresponding path program 1 times [2021-08-12 21:48:18,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:18,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618499474] [2021-08-12 21:48:18,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:19,450 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 21:48:19,453 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 21:48:19,517 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 21:48:19,517 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 21:48:19,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361 [2021-08-12 21:48:19,517 WARN L235 ceAbstractionStarter]: 181 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-12 21:48:19,517 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 182 thread instances. [2021-08-12 21:48:19,662 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 21:48:19,663 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 21:48:19,663 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 21:48:19,663 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-12 21:48:19,663 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 21:48:19,663 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 21:48:19,663 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 21:48:19,663 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 21:48:19,663 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 21:48:19,663 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 21:48:19,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 916 places, 551 transitions, 34954 flow [2021-08-12 21:48:20,953 INFO L129 PetriNetUnfolder]: 0/1097 cut-off events. [2021-08-12 21:48:20,953 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:20,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18297 conditions, 1097 events. 0/1097 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4342 event pairs, 0 based on Foata normal form. 0/914 useless extension candidates. Maximal degree in co-relation 0. Up to 183 conditions per place. [2021-08-12 21:48:20,954 INFO L82 GeneralOperation]: Start removeDead. Operand has 916 places, 551 transitions, 34954 flow [2021-08-12 21:48:20,964 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 914 places, 549 transitions, 34950 flow [2021-08-12 21:48:20,966 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-08-12 21:48:20,966 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-12 21:48:20,967 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-12 21:48:20,967 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-08-12 21:48:20,967 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 21:48:20,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 21:48:20,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1628867, now seen corresponding path program 1 times [2021-08-12 21:48:20,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 21:48:20,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008829424] [2021-08-12 21:48:20,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 21:48:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 21:48:21,077 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 21:48:21,077 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-12 21:48:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 21:48:21,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 21:48:21,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008829424] [2021-08-12 21:48:21,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008829424] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 21:48:21,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 21:48:21,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-12 21:48:21,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283686530] [2021-08-12 21:48:21,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 21:48:21,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 21:48:21,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 21:48:21,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 21:48:21,081 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 548 out of 551 [2021-08-12 21:48:21,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 914 places, 549 transitions, 34950 flow. Second operand has 3 states, 3 states have (on average 548.6666666666666) internal successors, (1646), 3 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 21:48:21,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-12 21:48:21,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 548 of 551 [2021-08-12 21:48:21,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand