/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:32:25,649 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 00:32:25,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:32:25,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:32:25,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:32:25,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:32:25,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:32:25,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:32:25,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:32:25,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:32:25,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:32:25,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:32:25,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:32:25,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:32:25,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:32:25,699 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 00:32:25,714 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:32:25,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:32:25,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:32:25,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:32:25,717 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:32:25,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:32:25,717 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:32:25,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:32:25,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:32:25,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:32:25,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:32:25,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:32:25,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:32:25,719 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:32:25,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:32:25,719 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:32:25,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:32:25,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:32:25,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:32:25,720 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:32:25,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:32:25,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:32:25,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:32:25,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:32:25,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:32:25,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:32:25,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:25,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:32:25,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:32:25,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 00:32:25,991 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:32:26,004 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:32:26,007 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:32:26,009 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:32:26,009 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:32:26,010 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi01.c [2020-07-21 00:32:26,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4659ee7cf/89c52cce34a74d7894d28d416906c684/FLAGc1876c50c [2020-07-21 00:32:26,463 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:32:26,464 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi01.c [2020-07-21 00:32:26,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4659ee7cf/89c52cce34a74d7894d28d416906c684/FLAGc1876c50c [2020-07-21 00:32:26,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4659ee7cf/89c52cce34a74d7894d28d416906c684 [2020-07-21 00:32:26,871 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:32:26,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:32:26,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:32:26,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:32:26,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:32:26,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:32:26" (1/1) ... [2020-07-21 00:32:26,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d00c3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:26, skipping insertion in model container [2020-07-21 00:32:26,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:32:26" (1/1) ... [2020-07-21 00:32:26,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:32:26,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:32:27,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:32:27,086 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:32:27,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:32:27,119 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:32:27,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:27 WrapperNode [2020-07-21 00:32:27,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:32:27,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:32:27,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:32:27,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:32:27,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:27" (1/1) ... [2020-07-21 00:32:27,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:27" (1/1) ... [2020-07-21 00:32:27,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:27" (1/1) ... [2020-07-21 00:32:27,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:27" (1/1) ... [2020-07-21 00:32:27,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:27" (1/1) ... [2020-07-21 00:32:27,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:27" (1/1) ... [2020-07-21 00:32:27,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:27" (1/1) ... [2020-07-21 00:32:27,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:32:27,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:32:27,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:32:27,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:32:27,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:27" (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 [2020-07-21 00:32:27,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:32:27,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:32:27,295 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-21 00:32:27,295 INFO L138 BoogieDeclarations]: Found implementation of procedure applyHanoi [2020-07-21 00:32:27,295 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:32:27,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:32:27,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:32:27,297 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-21 00:32:27,297 INFO L130 BoogieDeclarations]: Found specification of procedure applyHanoi [2020-07-21 00:32:27,298 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:32:27,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:32:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:32:27,534 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:32:27,535 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:32:27,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:32:27 BoogieIcfgContainer [2020-07-21 00:32:27,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:32:27,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:32:27,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:32:27,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:32:27,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:32:26" (1/3) ... [2020-07-21 00:32:27,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589d04be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:32:27, skipping insertion in model container [2020-07-21 00:32:27,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:27" (2/3) ... [2020-07-21 00:32:27,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589d04be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:32:27, skipping insertion in model container [2020-07-21 00:32:27,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:32:27" (3/3) ... [2020-07-21 00:32:27,579 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi01.c [2020-07-21 00:32:27,600 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:32:27,608 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:32:27,633 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:32:27,656 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:32:27,656 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:32:27,656 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:32:27,656 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:32:27,657 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:32:27,657 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:32:27,657 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:32:27,657 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:32:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 00:32:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 00:32:27,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:27,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:27,682 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:27,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:27,686 INFO L82 PathProgramCache]: Analyzing trace with hash -629617454, now seen corresponding path program 1 times [2020-07-21 00:32:27,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:27,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149935857] [2020-07-21 00:32:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:27,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:32:27,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:27,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:32:27,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:32:27,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:32:27,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149935857] [2020-07-21 00:32:27,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:32:27,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:32:27,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872398855] [2020-07-21 00:32:27,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:32:27,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:27,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:32:27,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:32:27,881 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-07-21 00:32:27,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:27,987 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-07-21 00:32:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:32:27,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 00:32:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:28,002 INFO L225 Difference]: With dead ends: 48 [2020-07-21 00:32:28,002 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 00:32:28,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:32:28,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 00:32:28,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 00:32:28,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 00:32:28,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-07-21 00:32:28,063 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 20 [2020-07-21 00:32:28,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:28,063 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-07-21 00:32:28,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:32:28,064 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-07-21 00:32:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 00:32:28,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:28,067 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:28,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:28,284 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:28,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:28,285 INFO L82 PathProgramCache]: Analyzing trace with hash 223523063, now seen corresponding path program 1 times [2020-07-21 00:32:28,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:28,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023232656] [2020-07-21 00:32:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:28,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:32:28,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:28,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 00:32:28,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-21 00:32:28,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:32:28,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023232656] [2020-07-21 00:32:28,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:28,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2020-07-21 00:32:28,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642907971] [2020-07-21 00:32:28,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:32:28,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:28,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:32:28,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:32:28,686 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 15 states. [2020-07-21 00:32:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:29,268 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2020-07-21 00:32:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 00:32:29,269 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-07-21 00:32:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:29,273 INFO L225 Difference]: With dead ends: 78 [2020-07-21 00:32:29,273 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 00:32:29,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:32:29,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 00:32:29,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2020-07-21 00:32:29,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 00:32:29,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2020-07-21 00:32:29,300 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 30 [2020-07-21 00:32:29,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:29,301 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2020-07-21 00:32:29,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:32:29,301 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2020-07-21 00:32:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 00:32:29,304 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:29,305 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:29,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:29,520 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:29,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:29,521 INFO L82 PathProgramCache]: Analyzing trace with hash 640231516, now seen corresponding path program 2 times [2020-07-21 00:32:29,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:29,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586430615] [2020-07-21 00:32:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:29,575 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:32:29,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:29,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 00:32:29,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 00:32:29,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:29,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:29,895 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 00:32:29,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 00:32:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 00:32:29,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586430615] [2020-07-21 00:32:29,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:29,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-21 00:32:29,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233228048] [2020-07-21 00:32:29,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:32:29,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:29,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:32:29,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:32:29,930 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand 11 states. [2020-07-21 00:32:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:30,076 INFO L93 Difference]: Finished difference Result 110 states and 174 transitions. [2020-07-21 00:32:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:32:30,076 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-21 00:32:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:30,079 INFO L225 Difference]: With dead ends: 110 [2020-07-21 00:32:30,079 INFO L226 Difference]: Without dead ends: 71 [2020-07-21 00:32:30,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:32:30,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-21 00:32:30,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-07-21 00:32:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 00:32:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-07-21 00:32:30,096 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 40 [2020-07-21 00:32:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:30,097 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-07-21 00:32:30,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:32:30,097 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-07-21 00:32:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 00:32:30,099 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:30,099 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:30,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:30,314 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:30,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:30,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1772916587, now seen corresponding path program 1 times [2020-07-21 00:32:30,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:30,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927549617] [2020-07-21 00:32:30,315 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:30,355 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:32:30,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:30,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 00:32:30,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 00:32:30,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:30,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 00:32:30,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:32:30,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927549617] [2020-07-21 00:32:30,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:30,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2020-07-21 00:32:30,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490011929] [2020-07-21 00:32:30,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:32:30,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:30,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:32:30,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:32:30,647 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 12 states. [2020-07-21 00:32:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:30,780 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-07-21 00:32:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:32:30,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-07-21 00:32:30,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:30,782 INFO L225 Difference]: With dead ends: 80 [2020-07-21 00:32:30,782 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 00:32:30,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:32:30,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 00:32:30,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-21 00:32:30,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 00:32:30,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2020-07-21 00:32:30,795 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 36 [2020-07-21 00:32:30,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:30,796 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2020-07-21 00:32:30,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:32:30,796 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2020-07-21 00:32:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 00:32:30,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:30,798 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:31,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:31,014 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:31,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:31,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1240446734, now seen corresponding path program 3 times [2020-07-21 00:32:31,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:31,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442030837] [2020-07-21 00:32:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:31,057 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:32:31,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:31,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:32:31,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 00:32:31,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:31,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:31,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 00:32:31,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442030837] [2020-07-21 00:32:31,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:31,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 00:32:31,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774486638] [2020-07-21 00:32:31,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:32:31,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:31,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:32:31,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:32:31,410 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand 11 states. [2020-07-21 00:32:31,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:31,583 INFO L93 Difference]: Finished difference Result 91 states and 141 transitions. [2020-07-21 00:32:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:32:31,583 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-21 00:32:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:31,585 INFO L225 Difference]: With dead ends: 91 [2020-07-21 00:32:31,585 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 00:32:31,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:32:31,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 00:32:31,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-07-21 00:32:31,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 00:32:31,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-21 00:32:31,601 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 40 [2020-07-21 00:32:31,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:31,602 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-21 00:32:31,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:32:31,602 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-21 00:32:31,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 00:32:31,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:31,611 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:31,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:31,813 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:31,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:31,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1471069545, now seen corresponding path program 4 times [2020-07-21 00:32:31,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:31,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573634828] [2020-07-21 00:32:31,814 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:31,871 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:32:31,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:31,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:32:31,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-07-21 00:32:31,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:32,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:32,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:32,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:32,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-21 00:32:32,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573634828] [2020-07-21 00:32:32,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:32,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:32:32,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857043036] [2020-07-21 00:32:32,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:32:32,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:32,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:32:32,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:32:32,326 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 13 states. [2020-07-21 00:32:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:32,462 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-07-21 00:32:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:32:32,463 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-07-21 00:32:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:32,464 INFO L225 Difference]: With dead ends: 58 [2020-07-21 00:32:32,465 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 00:32:32,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:32:32,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 00:32:32,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-07-21 00:32:32,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 00:32:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-07-21 00:32:32,479 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 50 [2020-07-21 00:32:32,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:32,480 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-07-21 00:32:32,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:32:32,480 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-07-21 00:32:32,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 00:32:32,482 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:32,482 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:32,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:32,697 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:32,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:32,697 INFO L82 PathProgramCache]: Analyzing trace with hash -979408629, now seen corresponding path program 2 times [2020-07-21 00:32:32,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:32,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425834196] [2020-07-21 00:32:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:32,754 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:32:32,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:32,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 00:32:32,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-21 00:32:32,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-21 00:32:33,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425834196] [2020-07-21 00:32:33,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:33,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 27 [2020-07-21 00:32:33,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928355706] [2020-07-21 00:32:33,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 00:32:33,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:33,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 00:32:33,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-07-21 00:32:33,448 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 27 states. [2020-07-21 00:32:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:35,085 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2020-07-21 00:32:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 00:32:35,089 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-07-21 00:32:35,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:35,091 INFO L225 Difference]: With dead ends: 105 [2020-07-21 00:32:35,091 INFO L226 Difference]: Without dead ends: 101 [2020-07-21 00:32:35,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=434, Invalid=2322, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 00:32:35,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-21 00:32:35,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2020-07-21 00:32:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-21 00:32:35,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 115 transitions. [2020-07-21 00:32:35,109 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 115 transitions. Word has length 56 [2020-07-21 00:32:35,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:35,110 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 115 transitions. [2020-07-21 00:32:35,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 00:32:35,110 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 115 transitions. [2020-07-21 00:32:35,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-21 00:32:35,112 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:35,112 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:35,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:35,327 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:35,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:35,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1033208535, now seen corresponding path program 3 times [2020-07-21 00:32:35,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:35,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665137076] [2020-07-21 00:32:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:35,377 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:32:35,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:35,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 00:32:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-07-21 00:32:35,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:35,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:35,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-07-21 00:32:35,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665137076] [2020-07-21 00:32:35,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:35,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:32:35,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796301794] [2020-07-21 00:32:35,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:32:35,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:35,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:32:35,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:32:35,793 INFO L87 Difference]: Start difference. First operand 84 states and 115 transitions. Second operand 15 states. [2020-07-21 00:32:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:36,075 INFO L93 Difference]: Finished difference Result 151 states and 226 transitions. [2020-07-21 00:32:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:32:36,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-07-21 00:32:36,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:36,077 INFO L225 Difference]: With dead ends: 151 [2020-07-21 00:32:36,077 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 00:32:36,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:32:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 00:32:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2020-07-21 00:32:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 00:32:36,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2020-07-21 00:32:36,109 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 62 [2020-07-21 00:32:36,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:36,111 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2020-07-21 00:32:36,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:32:36,112 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2020-07-21 00:32:36,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-21 00:32:36,113 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:36,113 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:36,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:36,315 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:36,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:36,316 INFO L82 PathProgramCache]: Analyzing trace with hash 622260971, now seen corresponding path program 4 times [2020-07-21 00:32:36,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:36,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651011760] [2020-07-21 00:32:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:36,379 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:32:36,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:36,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:32:36,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 74 proven. 70 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-21 00:32:36,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:36,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:36,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:37,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 74 proven. 75 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-07-21 00:32:37,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651011760] [2020-07-21 00:32:37,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:37,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:32:37,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450342394] [2020-07-21 00:32:37,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:32:37,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:37,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:32:37,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:32:37,058 INFO L87 Difference]: Start difference. First operand 72 states and 96 transitions. Second operand 15 states. [2020-07-21 00:32:37,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:37,316 INFO L93 Difference]: Finished difference Result 125 states and 182 transitions. [2020-07-21 00:32:37,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:32:37,317 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2020-07-21 00:32:37,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:37,319 INFO L225 Difference]: With dead ends: 125 [2020-07-21 00:32:37,319 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 00:32:37,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 127 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:32:37,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 00:32:37,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2020-07-21 00:32:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 00:32:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2020-07-21 00:32:37,332 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 76 [2020-07-21 00:32:37,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:37,332 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2020-07-21 00:32:37,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:32:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2020-07-21 00:32:37,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 00:32:37,334 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:37,334 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:37,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:37,538 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:37,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:37,539 INFO L82 PathProgramCache]: Analyzing trace with hash -633873909, now seen corresponding path program 5 times [2020-07-21 00:32:37,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:37,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104524971] [2020-07-21 00:32:37,541 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:37,627 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:32:37,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:37,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:32:37,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 48 proven. 125 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2020-07-21 00:32:37,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:37,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:37,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:38,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:38,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:38,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:38,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:38,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 48 proven. 135 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2020-07-21 00:32:38,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104524971] [2020-07-21 00:32:38,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:38,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:32:38,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384517182] [2020-07-21 00:32:38,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:32:38,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:38,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:32:38,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:32:38,397 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand 17 states. [2020-07-21 00:32:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:38,605 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2020-07-21 00:32:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:32:38,608 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-07-21 00:32:38,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:38,609 INFO L225 Difference]: With dead ends: 76 [2020-07-21 00:32:38,609 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 00:32:38,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 163 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:32:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 00:32:38,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-07-21 00:32:38,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 00:32:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2020-07-21 00:32:38,620 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 96 [2020-07-21 00:32:38,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:38,621 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2020-07-21 00:32:38,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:32:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2020-07-21 00:32:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-21 00:32:38,623 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:38,623 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:38,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:38,837 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:38,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:38,838 INFO L82 PathProgramCache]: Analyzing trace with hash 542454743, now seen corresponding path program 6 times [2020-07-21 00:32:38,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:38,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273505772] [2020-07-21 00:32:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:38,932 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:32:38,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:38,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 91 conjunts are in the unsatisfiable core [2020-07-21 00:32:38,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-07-21 00:32:39,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-07-21 00:32:40,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273505772] [2020-07-21 00:32:40,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:40,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 32] total 45 [2020-07-21 00:32:40,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14792104] [2020-07-21 00:32:40,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-21 00:32:40,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:40,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-21 00:32:40,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 00:32:40,778 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand 45 states. [2020-07-21 00:32:48,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:48,215 INFO L93 Difference]: Finished difference Result 226 states and 327 transitions. [2020-07-21 00:32:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-07-21 00:32:48,216 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 102 [2020-07-21 00:32:48,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:48,219 INFO L225 Difference]: With dead ends: 226 [2020-07-21 00:32:48,219 INFO L226 Difference]: Without dead ends: 222 [2020-07-21 00:32:48,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 151 SyntacticMatches, 11 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3314 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1797, Invalid=10413, Unknown=0, NotChecked=0, Total=12210 [2020-07-21 00:32:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-21 00:32:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 183. [2020-07-21 00:32:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-21 00:32:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 260 transitions. [2020-07-21 00:32:48,277 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 260 transitions. Word has length 102 [2020-07-21 00:32:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:48,280 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 260 transitions. [2020-07-21 00:32:48,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-21 00:32:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 260 transitions. [2020-07-21 00:32:48,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 00:32:48,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:48,285 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:48,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:48,486 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:48,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:48,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1145252683, now seen corresponding path program 7 times [2020-07-21 00:32:48,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:48,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048389108] [2020-07-21 00:32:48,488 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:48,583 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:32:48,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:48,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:32:48,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 138 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-07-21 00:32:48,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:49,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:49,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:49,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:49,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:49,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:49,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:49,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:49,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 156 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-07-21 00:32:49,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048389108] [2020-07-21 00:32:49,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:49,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:32:49,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067828882] [2020-07-21 00:32:49,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:32:49,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:49,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:32:49,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:32:49,788 INFO L87 Difference]: Start difference. First operand 183 states and 260 transitions. Second operand 21 states. [2020-07-21 00:32:50,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:50,113 INFO L93 Difference]: Finished difference Result 216 states and 328 transitions. [2020-07-21 00:32:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:32:50,114 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 108 [2020-07-21 00:32:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:50,118 INFO L225 Difference]: With dead ends: 216 [2020-07-21 00:32:50,118 INFO L226 Difference]: Without dead ends: 195 [2020-07-21 00:32:50,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 179 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:32:50,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-07-21 00:32:50,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 172. [2020-07-21 00:32:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-21 00:32:50,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 247 transitions. [2020-07-21 00:32:50,148 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 247 transitions. Word has length 108 [2020-07-21 00:32:50,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:50,149 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 247 transitions. [2020-07-21 00:32:50,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:32:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 247 transitions. [2020-07-21 00:32:50,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-21 00:32:50,152 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:50,152 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 12, 11, 11, 11, 11, 11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:50,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:50,361 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:50,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:50,362 INFO L82 PathProgramCache]: Analyzing trace with hash 589762519, now seen corresponding path program 8 times [2020-07-21 00:32:50,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:50,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331300579] [2020-07-21 00:32:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:50,460 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:32:50,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:50,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:32:50,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 169 proven. 332 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-07-21 00:32:50,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:51,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 169 proven. 345 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2020-07-21 00:32:51,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331300579] [2020-07-21 00:32:51,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:51,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:32:51,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215488387] [2020-07-21 00:32:51,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:32:51,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:51,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:32:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:32:51,838 INFO L87 Difference]: Start difference. First operand 172 states and 247 transitions. Second operand 19 states. [2020-07-21 00:32:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:52,292 INFO L93 Difference]: Finished difference Result 282 states and 462 transitions. [2020-07-21 00:32:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 00:32:52,292 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 142 [2020-07-21 00:32:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:52,298 INFO L225 Difference]: With dead ends: 282 [2020-07-21 00:32:52,298 INFO L226 Difference]: Without dead ends: 184 [2020-07-21 00:32:52,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 251 SyntacticMatches, 15 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2020-07-21 00:32:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-07-21 00:32:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 161. [2020-07-21 00:32:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-21 00:32:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 224 transitions. [2020-07-21 00:32:52,327 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 224 transitions. Word has length 142 [2020-07-21 00:32:52,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:52,328 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 224 transitions. [2020-07-21 00:32:52,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:32:52,328 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 224 transitions. [2020-07-21 00:32:52,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-21 00:32:52,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:52,331 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 12, 11, 11, 11, 11, 11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:52,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:52,547 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:52,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:52,547 INFO L82 PathProgramCache]: Analyzing trace with hash -370212393, now seen corresponding path program 9 times [2020-07-21 00:32:52,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:52,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657544227] [2020-07-21 00:32:52,548 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:52,674 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:32:52,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:52,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:32:52,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 233 proven. 268 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-07-21 00:32:52,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:53,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:53,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:53,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:53,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:53,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:53,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:53,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:53,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:53,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 233 proven. 281 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2020-07-21 00:32:54,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657544227] [2020-07-21 00:32:54,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:54,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:32:54,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116521880] [2020-07-21 00:32:54,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:32:54,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:54,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:32:54,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:32:54,029 INFO L87 Difference]: Start difference. First operand 161 states and 224 transitions. Second operand 19 states. [2020-07-21 00:32:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:54,461 INFO L93 Difference]: Finished difference Result 252 states and 375 transitions. [2020-07-21 00:32:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 00:32:54,461 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 142 [2020-07-21 00:32:54,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:54,464 INFO L225 Difference]: With dead ends: 252 [2020-07-21 00:32:54,465 INFO L226 Difference]: Without dead ends: 182 [2020-07-21 00:32:54,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 251 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:32:54,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-21 00:32:54,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2020-07-21 00:32:54,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-07-21 00:32:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 215 transitions. [2020-07-21 00:32:54,487 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 215 transitions. Word has length 142 [2020-07-21 00:32:54,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:54,488 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 215 transitions. [2020-07-21 00:32:54,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:32:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 215 transitions. [2020-07-21 00:32:54,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-07-21 00:32:54,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:54,491 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:54,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:54,714 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:54,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:54,714 INFO L82 PathProgramCache]: Analyzing trace with hash -2107974185, now seen corresponding path program 10 times [2020-07-21 00:32:54,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:54,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224204131] [2020-07-21 00:32:54,715 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:54,882 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:32:54,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:54,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:32:54,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 115 proven. 396 refuted. 0 times theorem prover too weak. 1573 trivial. 0 not checked. [2020-07-21 00:32:55,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:55,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:55,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:55,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:55,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:56,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:56,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:56,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:56,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:56,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 115 proven. 416 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2020-07-21 00:32:56,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224204131] [2020-07-21 00:32:56,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:56,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:32:56,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391834424] [2020-07-21 00:32:56,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:32:56,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:56,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:32:56,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:32:56,487 INFO L87 Difference]: Start difference. First operand 158 states and 215 transitions. Second operand 21 states. [2020-07-21 00:32:56,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:56,754 INFO L93 Difference]: Finished difference Result 175 states and 232 transitions. [2020-07-21 00:32:56,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:32:56,754 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 182 [2020-07-21 00:32:56,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:56,757 INFO L225 Difference]: With dead ends: 175 [2020-07-21 00:32:56,757 INFO L226 Difference]: Without dead ends: 171 [2020-07-21 00:32:56,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 327 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:32:56,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-21 00:32:56,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 161. [2020-07-21 00:32:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-21 00:32:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 218 transitions. [2020-07-21 00:32:56,780 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 218 transitions. Word has length 182 [2020-07-21 00:32:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:56,781 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 218 transitions. [2020-07-21 00:32:56,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:32:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 218 transitions. [2020-07-21 00:32:56,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-07-21 00:32:56,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:56,784 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:56,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:56,991 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:56,992 INFO L82 PathProgramCache]: Analyzing trace with hash 836851019, now seen corresponding path program 11 times [2020-07-21 00:32:56,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:56,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613099382] [2020-07-21 00:32:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:57,174 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:32:57,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:57,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 175 conjunts are in the unsatisfiable core [2020-07-21 00:32:57,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2020-07-21 00:32:57,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:33:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-07-21 00:33:02,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613099382] [2020-07-21 00:33:02,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:33:02,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 58] total 75 [2020-07-21 00:33:02,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060101406] [2020-07-21 00:33:02,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-21 00:33:02,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:33:02,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-21 00:33:02,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=5282, Unknown=0, NotChecked=0, Total=5550 [2020-07-21 00:33:02,504 INFO L87 Difference]: Start difference. First operand 161 states and 218 transitions. Second operand 75 states. [2020-07-21 00:33:03,059 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 49 [2020-07-21 00:33:03,294 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 46 [2020-07-21 00:33:03,618 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 47 [2020-07-21 00:33:03,826 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 43 [2020-07-21 00:33:04,054 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 44 [2020-07-21 00:33:04,272 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 40 [2020-07-21 00:33:04,512 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 41 [2020-07-21 00:33:04,702 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 37 [2020-07-21 00:33:04,916 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 38 [2020-07-21 00:33:05,091 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 34 [2020-07-21 00:33:05,379 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 36 [2020-07-21 00:33:05,560 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2020-07-21 00:33:05,847 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 33 [2020-07-21 00:33:06,262 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 30 [2020-07-21 00:33:08,994 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 45 [2020-07-21 00:33:09,373 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 42 [2020-07-21 00:33:09,748 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 39 [2020-07-21 00:33:10,088 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 36 [2020-07-21 00:33:10,406 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 33 [2020-07-21 00:33:10,713 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 30 [2020-07-21 00:33:11,004 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 27 [2020-07-21 00:33:13,115 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 43 [2020-07-21 00:33:13,484 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 46 [2020-07-21 00:33:13,821 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 41 [2020-07-21 00:33:14,144 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 43 [2020-07-21 00:33:14,444 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 38 [2020-07-21 00:33:14,760 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 40 [2020-07-21 00:33:15,067 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 35 [2020-07-21 00:33:15,401 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 38 [2020-07-21 00:33:15,678 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 32 [2020-07-21 00:33:15,965 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 35 [2020-07-21 00:33:16,240 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 29 [2020-07-21 00:33:16,529 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 32 [2020-07-21 00:33:16,783 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 26 [2020-07-21 00:33:17,048 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 29 [2020-07-21 00:33:17,279 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 23 [2020-07-21 00:33:17,522 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 26 [2020-07-21 00:33:20,598 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 47 [2020-07-21 00:33:21,000 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 50 [2020-07-21 00:33:21,416 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 44 [2020-07-21 00:33:21,805 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 46 [2020-07-21 00:33:22,147 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 41 [2020-07-21 00:33:22,495 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 43 [2020-07-21 00:33:22,829 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 38 [2020-07-21 00:33:23,181 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 40 [2020-07-21 00:33:23,497 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 35 [2020-07-21 00:33:23,827 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 37 [2020-07-21 00:33:24,113 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 32 [2020-07-21 00:33:24,432 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 34 [2020-07-21 00:33:24,697 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 30 [2020-07-21 00:33:24,971 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 31 [2020-07-21 00:33:25,191 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 00:33:25,422 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2020-07-21 00:33:25,827 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 00:33:26,768 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2020-07-21 00:33:27,351 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2020-07-21 00:33:27,566 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2020-07-21 00:33:27,857 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2020-07-21 00:33:28,702 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2020-07-21 00:33:30,200 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2020-07-21 00:33:31,229 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2020-07-21 00:33:31,535 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2020-07-21 00:33:31,959 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 50 [2020-07-21 00:33:32,306 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 44 [2020-07-21 00:33:32,715 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 47 [2020-07-21 00:33:33,415 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 32 [2020-07-21 00:33:33,831 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 50 [2020-07-21 00:33:34,082 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 7 [2020-07-21 00:33:34,850 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 47 [2020-07-21 00:33:35,249 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 44 [2020-07-21 00:33:35,655 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2020-07-21 00:33:35,987 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2020-07-21 00:33:36,321 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2020-07-21 00:33:36,655 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 23 [2020-07-21 00:33:37,697 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2020-07-21 00:33:40,494 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-07-21 00:33:40,735 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-07-21 00:33:41,216 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 41 [2020-07-21 00:33:41,769 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 38 [2020-07-21 00:33:42,140 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 44 [2020-07-21 00:33:42,681 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 29 [2020-07-21 00:33:43,214 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 35 [2020-07-21 00:33:44,338 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 32 [2020-07-21 00:33:44,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:33:44,410 INFO L93 Difference]: Finished difference Result 528 states and 796 transitions. [2020-07-21 00:33:44,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-07-21 00:33:44,411 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 188 [2020-07-21 00:33:44,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:33:44,418 INFO L225 Difference]: With dead ends: 528 [2020-07-21 00:33:44,418 INFO L226 Difference]: Without dead ends: 524 [2020-07-21 00:33:44,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 280 SyntacticMatches, 24 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16631 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=8020, Invalid=46970, Unknown=0, NotChecked=0, Total=54990 [2020-07-21 00:33:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-07-21 00:33:44,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 441. [2020-07-21 00:33:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-07-21 00:33:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 635 transitions. [2020-07-21 00:33:44,487 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 635 transitions. Word has length 188 [2020-07-21 00:33:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:33:44,487 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 635 transitions. [2020-07-21 00:33:44,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-21 00:33:44,488 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 635 transitions. [2020-07-21 00:33:44,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-07-21 00:33:44,493 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:33:44,494 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:33:44,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:44,708 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:33:44,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:33:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1322769943, now seen corresponding path program 12 times [2020-07-21 00:33:44,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:33:44,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081057196] [2020-07-21 00:33:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:44,916 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:33:44,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:33:44,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:33:44,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:33:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 415 refuted. 0 times theorem prover too weak. 1592 trivial. 0 not checked. [2020-07-21 00:33:45,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:33:45,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:45,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:45,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:45,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:45,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:46,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:47,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:47,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:47,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:47,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:47,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:47,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 447 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2020-07-21 00:33:47,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081057196] [2020-07-21 00:33:47,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:33:47,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 00:33:47,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291019274] [2020-07-21 00:33:47,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 00:33:47,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:33:47,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 00:33:47,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:33:47,643 INFO L87 Difference]: Start difference. First operand 441 states and 635 transitions. Second operand 25 states. [2020-07-21 00:33:48,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:33:48,293 INFO L93 Difference]: Finished difference Result 502 states and 783 transitions. [2020-07-21 00:33:48,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:33:48,294 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 194 [2020-07-21 00:33:48,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:33:48,302 INFO L225 Difference]: With dead ends: 502 [2020-07-21 00:33:48,302 INFO L226 Difference]: Without dead ends: 478 [2020-07-21 00:33:48,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 343 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 00:33:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-07-21 00:33:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 427. [2020-07-21 00:33:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-07-21 00:33:48,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 618 transitions. [2020-07-21 00:33:48,387 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 618 transitions. Word has length 194 [2020-07-21 00:33:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:33:48,388 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 618 transitions. [2020-07-21 00:33:48,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 00:33:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 618 transitions. [2020-07-21 00:33:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-21 00:33:48,403 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:33:48,404 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:33:48,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:48,620 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:33:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:33:48,621 INFO L82 PathProgramCache]: Analyzing trace with hash -547968693, now seen corresponding path program 13 times [2020-07-21 00:33:48,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:33:48,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755474596] [2020-07-21 00:33:48,622 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:48,996 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:33:48,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:33:49,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:33:49,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:33:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1087 refuted. 0 times theorem prover too weak. 7431 trivial. 0 not checked. [2020-07-21 00:33:49,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:33:49,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:49,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:49,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:49,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:49,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:51,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:51,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:52,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:52,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:52,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:52,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:52,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:52,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:52,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1121 refuted. 0 times theorem prover too weak. 7397 trivial. 0 not checked. [2020-07-21 00:33:53,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755474596] [2020-07-21 00:33:53,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:33:53,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 00:33:53,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229114024] [2020-07-21 00:33:53,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 00:33:53,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:33:53,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 00:33:53,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:33:53,104 INFO L87 Difference]: Start difference. First operand 427 states and 618 transitions. Second operand 25 states. [2020-07-21 00:33:53,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:33:53,667 INFO L93 Difference]: Finished difference Result 478 states and 724 transitions. [2020-07-21 00:33:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:33:53,668 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 348 [2020-07-21 00:33:53,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:33:53,676 INFO L225 Difference]: With dead ends: 478 [2020-07-21 00:33:53,676 INFO L226 Difference]: Without dead ends: 443 [2020-07-21 00:33:53,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 651 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 00:33:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-07-21 00:33:53,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 394. [2020-07-21 00:33:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-07-21 00:33:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 572 transitions. [2020-07-21 00:33:53,739 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 572 transitions. Word has length 348 [2020-07-21 00:33:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:33:53,744 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 572 transitions. [2020-07-21 00:33:53,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 00:33:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 572 transitions. [2020-07-21 00:33:53,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-07-21 00:33:53,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:33:53,757 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:33:53,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:53,972 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:33:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:33:53,973 INFO L82 PathProgramCache]: Analyzing trace with hash -604098025, now seen corresponding path program 14 times [2020-07-21 00:33:53,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:33:53,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120762823] [2020-07-21 00:33:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:54,358 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:33:54,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:33:54,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 339 conjunts are in the unsatisfiable core [2020-07-21 00:33:54,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:33:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 2940 refuted. 0 times theorem prover too weak. 5854 trivial. 0 not checked. [2020-07-21 00:33:55,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 8644 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-07-21 00:34:14,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120762823] [2020-07-21 00:34:14,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:14,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 108] total 129 [2020-07-21 00:34:14,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766673772] [2020-07-21 00:34:14,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2020-07-21 00:34:14,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:14,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2020-07-21 00:34:14,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=16060, Unknown=0, NotChecked=0, Total=16512 [2020-07-21 00:34:14,457 INFO L87 Difference]: Start difference. First operand 394 states and 572 transitions. Second operand 129 states. [2020-07-21 00:34:15,129 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 6 [2020-07-21 00:34:16,220 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 97 [2020-07-21 00:34:16,986 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 94 [2020-07-21 00:34:17,812 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 95 [2020-07-21 00:34:18,606 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 91 [2020-07-21 00:34:19,531 WARN L193 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 92 [2020-07-21 00:34:20,178 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 88 [2020-07-21 00:34:20,885 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 89 [2020-07-21 00:34:21,529 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 85 [2020-07-21 00:34:22,228 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 86 [2020-07-21 00:34:22,893 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 82 [2020-07-21 00:34:23,570 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 83 [2020-07-21 00:34:24,165 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 79 [2020-07-21 00:34:24,943 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 80 [2020-07-21 00:34:25,522 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 76 [2020-07-21 00:34:26,275 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 77 [2020-07-21 00:34:26,871 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 73 [2020-07-21 00:34:27,590 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 74 [2020-07-21 00:34:28,137 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 70 [2020-07-21 00:34:28,829 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 71 [2020-07-21 00:34:29,346 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 67 [2020-07-21 00:34:30,008 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 68 [2020-07-21 00:34:30,485 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 64 [2020-07-21 00:34:31,137 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 65 [2020-07-21 00:34:31,603 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 61 [2020-07-21 00:34:32,220 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 62 [2020-07-21 00:34:32,668 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 58 [2020-07-21 00:34:33,257 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 59 [2020-07-21 00:34:33,681 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 55 [2020-07-21 00:34:34,253 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 56 [2020-07-21 00:34:34,664 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 52 [2020-07-21 00:34:35,227 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 53 [2020-07-21 00:34:35,614 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 49 [2020-07-21 00:34:36,145 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 50 [2020-07-21 00:34:36,534 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 46 [2020-07-21 00:34:37,062 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 47 [2020-07-21 00:34:37,417 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 43 [2020-07-21 00:34:37,906 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 44 [2020-07-21 00:34:38,252 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-07-21 00:34:38,718 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 41 [2020-07-21 00:34:39,041 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 37 [2020-07-21 00:34:39,498 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 38 [2020-07-21 00:34:39,833 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 34 [2020-07-21 00:34:40,247 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 35 [2020-07-21 00:34:40,549 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 31 [2020-07-21 00:34:40,968 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 32 [2020-07-21 00:34:41,241 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 28 [2020-07-21 00:34:41,618 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 29 [2020-07-21 00:34:42,241 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 26 [2020-07-21 00:34:46,504 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 89 [2020-07-21 00:34:47,554 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 86 [2020-07-21 00:34:48,602 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 83 [2020-07-21 00:34:49,562 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 80 [2020-07-21 00:34:50,518 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 77 [2020-07-21 00:34:51,419 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 74 [2020-07-21 00:34:52,312 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 71 [2020-07-21 00:34:53,211 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 68 [2020-07-21 00:34:54,063 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 65 [2020-07-21 00:34:54,921 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 62 [2020-07-21 00:34:55,707 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 59 [2020-07-21 00:34:56,464 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 56 [2020-07-21 00:34:57,237 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 53 [2020-07-21 00:34:57,953 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 51 [2020-07-21 00:34:58,614 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 48 [2020-07-21 00:34:59,279 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 45 [2020-07-21 00:34:59,893 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 42 [2020-07-21 00:35:00,497 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 39 [2020-07-21 00:35:01,066 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 36 [2020-07-21 00:35:01,666 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 33 [2020-07-21 00:35:02,238 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 30 [2020-07-21 00:35:02,766 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 27 [2020-07-21 00:35:03,277 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 24 [2020-07-21 00:35:06,966 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 89 [2020-07-21 00:35:08,053 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 91 [2020-07-21 00:35:09,073 WARN L193 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 86 [2020-07-21 00:35:10,114 WARN L193 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 88 [2020-07-21 00:35:11,121 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 83 [2020-07-21 00:35:12,155 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 86 [2020-07-21 00:35:13,110 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 80 [2020-07-21 00:35:14,133 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 83 [2020-07-21 00:35:15,089 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 77 [2020-07-21 00:35:16,059 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 80 [2020-07-21 00:35:17,002 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 74 [2020-07-21 00:35:17,955 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 77 [2020-07-21 00:35:18,837 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 71 [2020-07-21 00:35:19,764 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 74 [2020-07-21 00:35:20,633 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 68 [2020-07-21 00:35:21,550 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 71 [2020-07-21 00:35:22,381 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 65 [2020-07-21 00:35:23,226 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 68 [2020-07-21 00:35:24,035 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 62 [2020-07-21 00:35:24,936 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 65 [2020-07-21 00:35:25,712 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 59 [2020-07-21 00:35:26,531 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 62 [2020-07-21 00:35:27,283 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 56 [2020-07-21 00:35:28,077 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 59 [2020-07-21 00:35:28,814 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 53 [2020-07-21 00:35:29,565 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 56 [2020-07-21 00:35:30,268 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 51 [2020-07-21 00:35:30,972 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 53 [2020-07-21 00:35:31,678 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 48 [2020-07-21 00:35:32,369 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 50 [2020-07-21 00:35:33,016 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 45 [2020-07-21 00:35:33,671 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 47 [2020-07-21 00:35:34,271 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 42 [2020-07-21 00:35:34,893 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 44 [2020-07-21 00:35:35,498 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 39 [2020-07-21 00:35:36,105 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 41 [2020-07-21 00:35:36,670 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 36 [2020-07-21 00:35:37,262 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 38 [2020-07-21 00:35:37,812 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 33 [2020-07-21 00:35:38,366 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-07-21 00:35:38,889 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 30 [2020-07-21 00:35:39,404 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 32 [2020-07-21 00:35:39,884 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 27 [2020-07-21 00:35:40,380 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 29 [2020-07-21 00:35:40,831 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 24 [2020-07-21 00:35:41,312 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 26 [2020-07-21 00:35:41,756 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2020-07-21 00:35:42,238 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 23 [2020-07-21 00:35:42,667 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 18 [2020-07-21 00:35:43,104 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 20 [2020-07-21 00:35:45,358 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-07-21 00:35:46,702 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2020-07-21 00:35:47,957 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 248 DAG size of output: 92 [2020-07-21 00:35:49,234 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 258 DAG size of output: 94 [2020-07-21 00:35:50,464 WARN L193 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 89 [2020-07-21 00:35:51,669 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 250 DAG size of output: 91 [2020-07-21 00:35:52,839 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 86 [2020-07-21 00:35:54,028 WARN L193 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 88 [2020-07-21 00:35:55,215 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 83 [2020-07-21 00:35:56,387 WARN L193 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 85 [2020-07-21 00:35:57,655 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 80 [2020-07-21 00:35:58,881 WARN L193 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 82 [2020-07-21 00:35:59,999 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 78 [2020-07-21 00:36:01,126 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 79 [2020-07-21 00:36:02,233 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 75 [2020-07-21 00:36:03,374 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 76 [2020-07-21 00:36:04,456 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 72 [2020-07-21 00:36:05,539 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 74 [2020-07-21 00:36:06,600 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 69 [2020-07-21 00:36:07,652 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 71 [2020-07-21 00:36:08,665 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 66 [2020-07-21 00:36:09,696 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 68 [2020-07-21 00:36:10,638 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 63 [2020-07-21 00:36:11,588 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 65 [2020-07-21 00:36:12,540 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 60 [2020-07-21 00:36:13,428 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 62 [2020-07-21 00:36:14,323 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 57 [2020-07-21 00:36:15,217 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 59 [2020-07-21 00:36:16,051 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 54 [2020-07-21 00:36:16,916 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 56 [2020-07-21 00:36:17,748 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 51 [2020-07-21 00:36:18,583 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 53 [2020-07-21 00:36:19,374 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 48 [2020-07-21 00:36:20,285 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 50 [2020-07-21 00:36:21,066 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 45 [2020-07-21 00:36:21,897 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 47 [2020-07-21 00:36:22,647 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 42 [2020-07-21 00:36:23,401 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 44 [2020-07-21 00:36:24,162 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 39 [2020-07-21 00:36:24,918 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 41 [2020-07-21 00:36:25,626 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 36 [2020-07-21 00:36:26,348 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 38 [2020-07-21 00:36:27,026 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 33 [2020-07-21 00:36:27,731 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 35 [2020-07-21 00:36:28,377 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 30 [2020-07-21 00:36:29,040 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 32 [2020-07-21 00:36:29,568 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 00:36:30,114 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-07-21 00:36:30,613 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-07-21 00:36:31,149 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 00:36:33,841 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2020-07-21 00:36:34,268 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-07-21 00:36:34,757 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 00:36:35,281 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-07-21 00:36:35,710 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2020-07-21 00:36:36,174 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-07-21 00:36:36,683 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 00:36:37,219 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-07-21 00:36:37,787 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 33 [2020-07-21 00:36:39,810 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2020-07-21 00:36:40,723 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2020-07-21 00:36:42,361 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2020-07-21 00:36:43,997 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2020-07-21 00:36:45,572 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 29 [2020-07-21 00:36:46,538 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2020-07-21 00:36:47,406 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2020-07-21 00:36:48,767 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2020-07-21 00:36:49,966 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 62 [2020-07-21 00:36:51,130 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 44 [2020-07-21 00:36:52,172 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 47 [2020-07-21 00:36:53,362 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 53 [2020-07-21 00:36:54,428 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 50 [2020-07-21 00:36:55,191 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2020-07-21 00:36:56,338 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 56 [2020-07-21 00:36:57,625 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 65 [2020-07-21 00:36:58,963 WARN L193 SmtUtils]: Spent 962.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 86 [2020-07-21 00:37:00,341 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 68 [2020-07-21 00:37:01,629 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 71 [2020-07-21 00:37:02,915 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 77 [2020-07-21 00:37:04,268 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 74 [2020-07-21 00:37:05,333 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 59 [2020-07-21 00:37:06,663 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 80 [2020-07-21 00:37:08,109 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 202 DAG size of output: 89 [2020-07-21 00:37:09,877 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 210 DAG size of output: 92 [2020-07-21 00:37:11,421 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 219 DAG size of output: 95 [2020-07-21 00:37:13,044 WARN L193 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 83 [2020-07-21 00:37:14,985 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 228 DAG size of output: 98 [2020-07-21 00:37:15,979 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 33 [2020-07-21 00:37:16,668 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2020-07-21 00:37:18,710 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 258 DAG size of output: 94 [2020-07-21 00:37:20,583 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 267 DAG size of output: 97 [2020-07-21 00:37:22,478 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 250 DAG size of output: 91 [2020-07-21 00:37:24,256 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 259 DAG size of output: 94 [2020-07-21 00:37:25,994 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 243 DAG size of output: 88 [2020-07-21 00:37:27,760 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 251 DAG size of output: 91 [2020-07-21 00:37:29,451 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 237 DAG size of output: 85 [2020-07-21 00:37:31,132 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 244 DAG size of output: 88 [2020-07-21 00:37:32,949 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 230 DAG size of output: 82 [2020-07-21 00:37:34,673 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 238 DAG size of output: 85 [2020-07-21 00:37:36,378 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 222 DAG size of output: 79 [2020-07-21 00:37:38,034 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 231 DAG size of output: 82 [2020-07-21 00:37:39,688 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 217 DAG size of output: 76 [2020-07-21 00:37:41,312 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 223 DAG size of output: 79 [2020-07-21 00:37:42,889 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 211 DAG size of output: 73 [2020-07-21 00:37:44,490 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 218 DAG size of output: 76 [2020-07-21 00:37:46,086 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 202 DAG size of output: 70 [2020-07-21 00:37:47,866 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 257 DAG size of output: 95 [2020-07-21 00:37:49,443 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 212 DAG size of output: 73 [2020-07-21 00:37:51,245 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 265 DAG size of output: 98 [2020-07-21 00:37:52,681 WARN L193 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 67 [2020-07-21 00:37:54,127 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 203 DAG size of output: 70 [2020-07-21 00:37:55,831 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 249 DAG size of output: 92 [2020-07-21 00:37:57,234 WARN L193 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 64 [2020-07-21 00:37:58,690 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 195 DAG size of output: 67 [2020-07-21 00:38:00,394 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 242 DAG size of output: 89 [2020-07-21 00:38:01,621 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 61 [2020-07-21 00:38:02,984 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 64 [2020-07-21 00:38:04,705 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 236 DAG size of output: 86 [2020-07-21 00:38:06,155 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 58 [2020-07-21 00:38:07,538 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 61 [2020-07-21 00:38:09,383 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 229 DAG size of output: 83 [2020-07-21 00:38:10,776 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 55 [2020-07-21 00:38:12,121 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 58 [2020-07-21 00:38:13,903 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 221 DAG size of output: 80 [2020-07-21 00:38:15,217 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 53 [2020-07-21 00:38:16,513 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 55 [2020-07-21 00:38:18,331 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 216 DAG size of output: 77 [2020-07-21 00:38:19,569 WARN L193 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 51 [2020-07-21 00:38:20,687 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 53 [2020-07-21 00:38:21,925 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 48 [2020-07-21 00:38:23,003 WARN L193 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 51 [2020-07-21 00:38:24,300 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 45 [2020-07-21 00:38:25,342 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 48 [2020-07-21 00:38:26,476 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2020-07-21 00:38:27,461 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 45 [2020-07-21 00:38:28,439 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2020-07-21 00:38:29,376 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2020-07-21 00:38:30,875 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-21 00:38:31,426 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2020-07-21 00:38:32,153 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-07-21 00:38:32,762 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2020-07-21 00:38:33,411 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2020-07-21 00:38:37,155 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2020-07-21 00:38:38,089 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2020-07-21 00:38:39,448 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 41 [2020-07-21 00:38:41,182 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 216 DAG size of output: 89 [2020-07-21 00:38:42,517 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2020-07-21 00:38:44,305 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 225 DAG size of output: 92 [2020-07-21 00:38:45,612 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 44 [2020-07-21 00:38:46,502 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 14 [2020-07-21 00:38:47,791 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 17 [2020-07-21 00:38:49,197 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 50 [2020-07-21 00:38:50,370 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 11 [2020-07-21 00:38:51,773 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 47 [2020-07-21 00:38:53,018 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 20 [2020-07-21 00:38:55,229 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 53 [2020-07-21 00:38:56,933 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2020-07-21 00:38:58,730 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 23 [2020-07-21 00:39:00,489 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 199 DAG size of output: 83 [2020-07-21 00:39:02,252 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 62 [2020-07-21 00:39:03,925 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 65 [2020-07-21 00:39:05,133 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 29 [2020-07-21 00:39:06,861 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 164 DAG size of output: 68 [2020-07-21 00:39:08,830 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 177 DAG size of output: 74 [2020-07-21 00:39:10,626 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 171 DAG size of output: 71 [2020-07-21 00:39:12,232 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 59 [2020-07-21 00:39:14,235 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 185 DAG size of output: 77 [2020-07-21 00:39:15,540 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 38 [2020-07-21 00:39:17,420 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 207 DAG size of output: 86 [2020-07-21 00:39:25,249 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 50 [2020-07-21 00:39:26,523 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2020-07-21 00:39:27,635 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2020-07-21 00:39:28,943 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-07-21 00:39:29,472 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2020-07-21 00:39:30,933 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-07-21 00:39:32,869 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-07-21 00:39:37,312 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 53 [2020-07-21 00:40:01,839 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 230 DAG size of output: 98 [2020-07-21 00:40:02,956 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 7 [2020-07-21 00:40:03,726 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 6 [2020-07-21 00:40:04,453 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 00:40:07,142 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 221 DAG size of output: 95 [2020-07-21 00:40:09,525 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 212 DAG size of output: 92 [2020-07-21 00:40:11,824 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 204 DAG size of output: 89 [2020-07-21 00:40:14,365 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 197 DAG size of output: 86 [2020-07-21 00:40:16,680 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 190 DAG size of output: 83 [2020-07-21 00:40:19,032 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 182 DAG size of output: 80 [2020-07-21 00:40:21,306 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 176 DAG size of output: 77 [2020-07-21 00:40:23,524 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 169 DAG size of output: 74 [2020-07-21 00:40:27,766 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 56 [2020-07-21 00:40:31,395 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 160 DAG size of output: 71 [2020-07-21 00:40:33,574 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 152 DAG size of output: 68 [2020-07-21 00:40:35,649 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 146 DAG size of output: 65 [2020-07-21 00:40:37,728 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 139 DAG size of output: 62 [2020-07-21 00:40:39,611 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 131 DAG size of output: 59 [2020-07-21 00:40:42,220 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2020-07-21 00:40:44,117 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 56 [2020-07-21 00:40:46,406 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 192 DAG size of output: 80 [2020-07-21 00:40:48,326 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-07-21 00:40:57,203 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 00:40:58,062 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 00:40:58,995 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 00:40:59,852 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 00:41:00,778 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 00:41:01,628 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 00:41:02,490 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 00:41:03,310 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 8 [2020-07-21 00:41:04,828 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2020-07-21 00:41:05,905 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2020-07-21 00:41:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:41:06,194 INFO L93 Difference]: Finished difference Result 1231 states and 2149 transitions. [2020-07-21 00:41:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2020-07-21 00:41:06,199 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 354 [2020-07-21 00:41:06,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:41:06,220 INFO L225 Difference]: With dead ends: 1231 [2020-07-21 00:41:06,220 INFO L226 Difference]: Without dead ends: 1227 [2020-07-21 00:41:06,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1097 GetRequests, 490 SyntacticMatches, 92 SemanticMatches, 515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88034 ImplicationChecksByTransitivity, 320.7s TimeCoverageRelationStatistics Valid=38389, Invalid=228383, Unknown=0, NotChecked=0, Total=266772 [2020-07-21 00:41:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2020-07-21 00:41:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1036. [2020-07-21 00:41:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1036 states. [2020-07-21 00:41:06,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1613 transitions. [2020-07-21 00:41:06,390 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1613 transitions. Word has length 354 [2020-07-21 00:41:06,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:41:06,390 INFO L479 AbstractCegarLoop]: Abstraction has 1036 states and 1613 transitions. [2020-07-21 00:41:06,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 129 states. [2020-07-21 00:41:06,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1613 transitions. [2020-07-21 00:41:06,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-07-21 00:41:06,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:41:06,400 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:41:06,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:41:06,615 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:41:06,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:41:06,615 INFO L82 PathProgramCache]: Analyzing trace with hash 800684683, now seen corresponding path program 15 times [2020-07-21 00:41:06,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:41:06,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494320229] [2020-07-21 00:41:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:41:06,962 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:41:06,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:41:06,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 00:41:06,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:41:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1112 refuted. 0 times theorem prover too weak. 7456 trivial. 0 not checked. [2020-07-21 00:41:07,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:41:10,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:10,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:11,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:11,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:11,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:11,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:11,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:12,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:18,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:18,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:19,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:19,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:20,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:20,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:21,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:21,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:21,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1162 refuted. 0 times theorem prover too weak. 7406 trivial. 0 not checked. [2020-07-21 00:41:21,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494320229] [2020-07-21 00:41:21,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:41:21,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-21 00:41:21,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954503559] [2020-07-21 00:41:21,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 00:41:21,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:41:21,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 00:41:21,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:41:21,574 INFO L87 Difference]: Start difference. First operand 1036 states and 1613 transitions. Second operand 29 states. [2020-07-21 00:41:23,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:41:23,310 INFO L93 Difference]: Finished difference Result 1221 states and 2313 transitions. [2020-07-21 00:41:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 00:41:23,315 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 360 [2020-07-21 00:41:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:41:23,328 INFO L225 Difference]: With dead ends: 1221 [2020-07-21 00:41:23,328 INFO L226 Difference]: Without dead ends: 1194 [2020-07-21 00:41:23,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 667 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=319, Invalid=1321, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 00:41:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2020-07-21 00:41:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1024. [2020-07-21 00:41:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-07-21 00:41:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1655 transitions. [2020-07-21 00:41:23,490 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1655 transitions. Word has length 360 [2020-07-21 00:41:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:41:23,491 INFO L479 AbstractCegarLoop]: Abstraction has 1024 states and 1655 transitions. [2020-07-21 00:41:23,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 00:41:23,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1655 transitions. [2020-07-21 00:41:23,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2020-07-21 00:41:23,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:41:23,505 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 64, 63, 63, 63, 63, 63, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:41:23,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:41:23,719 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:41:23,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:41:23,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2099436055, now seen corresponding path program 16 times [2020-07-21 00:41:23,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:41:23,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787370083] [2020-07-21 00:41:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:41:24,328 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:41:24,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:41:24,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 3210 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 00:41:24,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:41:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 35962 backedges. 537 proven. 2750 refuted. 0 times theorem prover too weak. 32675 trivial. 0 not checked. [2020-07-21 00:41:25,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:41:26,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:27,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:27,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:27,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:27,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:31,487 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 00:41:39,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:43,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:43,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:45,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:45,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:45,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:45,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:46,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:46,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:46,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 35962 backedges. 537 proven. 2802 refuted. 0 times theorem prover too weak. 32623 trivial. 0 not checked. [2020-07-21 00:41:46,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787370083] [2020-07-21 00:41:46,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:41:46,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-21 00:41:46,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620891023] [2020-07-21 00:41:46,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 00:41:46,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:41:46,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 00:41:46,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:41:46,897 INFO L87 Difference]: Start difference. First operand 1024 states and 1655 transitions. Second operand 29 states. [2020-07-21 00:41:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:41:48,686 INFO L93 Difference]: Finished difference Result 1151 states and 2127 transitions. [2020-07-21 00:41:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 00:41:48,691 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 674 [2020-07-21 00:41:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:41:48,705 INFO L225 Difference]: With dead ends: 1151 [2020-07-21 00:41:48,706 INFO L226 Difference]: Without dead ends: 1107 [2020-07-21 00:41:48,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1359 GetRequests, 1295 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=325, Invalid=1315, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 00:41:48,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2020-07-21 00:41:48,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 982. [2020-07-21 00:41:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2020-07-21 00:41:48,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1611 transitions. [2020-07-21 00:41:48,851 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1611 transitions. Word has length 674 [2020-07-21 00:41:48,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:41:48,852 INFO L479 AbstractCegarLoop]: Abstraction has 982 states and 1611 transitions. [2020-07-21 00:41:48,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 00:41:48,852 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1611 transitions. [2020-07-21 00:41:48,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2020-07-21 00:41:48,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:41:48,868 INFO L422 BasicCegarLoop]: trace histogram [159, 159, 80, 79, 79, 79, 79, 79, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:41:49,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:41:49,083 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:41:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:41:49,084 INFO L82 PathProgramCache]: Analyzing trace with hash 886558859, now seen corresponding path program 17 times [2020-07-21 00:41:49,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:41:49,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952426796] [2020-07-21 00:41:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:41:49,761 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:41:49,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:41:49,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 3142 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 00:41:49,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:41:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 56486 backedges. 3559 proven. 4270 refuted. 0 times theorem prover too weak. 48657 trivial. 0 not checked. [2020-07-21 00:41:50,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:42:01,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:03,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:06,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:06,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:07,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:07,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:08,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:08,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:08,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:08,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:10,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:17,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:19,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:19,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:20,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:20,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:20,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:20,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:21,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 56486 backedges. 3559 proven. 4332 refuted. 0 times theorem prover too weak. 48595 trivial. 0 not checked. [2020-07-21 00:42:21,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952426796] [2020-07-21 00:42:21,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:42:21,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 31 [2020-07-21 00:42:21,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275175089] [2020-07-21 00:42:21,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-21 00:42:21,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:42:21,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-21 00:42:21,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2020-07-21 00:42:21,507 INFO L87 Difference]: Start difference. First operand 982 states and 1611 transitions. Second operand 31 states. [2020-07-21 00:42:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:42:24,902 INFO L93 Difference]: Finished difference Result 2096 states and 3998 transitions. [2020-07-21 00:42:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-21 00:42:24,909 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 840 [2020-07-21 00:42:24,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:42:24,921 INFO L225 Difference]: With dead ends: 2096 [2020-07-21 00:42:24,921 INFO L226 Difference]: Without dead ends: 1412 [2020-07-21 00:42:24,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1700 GetRequests, 1623 SyntacticMatches, 27 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2020-07-21 00:42:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2020-07-21 00:42:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1073. [2020-07-21 00:42:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1073 states. [2020-07-21 00:42:25,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1453 transitions. [2020-07-21 00:42:25,066 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1453 transitions. Word has length 840 [2020-07-21 00:42:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:42:25,067 INFO L479 AbstractCegarLoop]: Abstraction has 1073 states and 1453 transitions. [2020-07-21 00:42:25,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-21 00:42:25,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1453 transitions. [2020-07-21 00:42:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2020-07-21 00:42:25,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:42:25,080 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 64, 63, 63, 63, 63, 63, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:42:25,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:42:25,294 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:42:25,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:42:25,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2092966539, now seen corresponding path program 18 times [2020-07-21 00:42:25,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:42:25,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435441391] [2020-07-21 00:42:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:42:25,956 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:42:25,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:42:25,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 3224 conjuncts, 663 conjunts are in the unsatisfiable core [2020-07-21 00:42:25,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:42:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 35990 backedges. 0 proven. 12010 refuted. 0 times theorem prover too weak. 23980 trivial. 0 not checked. [2020-07-21 00:42:30,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 35990 backedges. 0 proven. 35698 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-07-21 00:45:01,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435441391] [2020-07-21 00:45:01,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:01,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 206] total 231 [2020-07-21 00:45:01,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976403708] [2020-07-21 00:45:01,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 231 states [2020-07-21 00:45:01,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:01,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 231 interpolants. [2020-07-21 00:45:01,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=52346, Unknown=0, NotChecked=0, Total=53130 [2020-07-21 00:45:01,444 INFO L87 Difference]: Start difference. First operand 1073 states and 1453 transitions. Second operand 231 states. [2020-07-21 00:45:04,893 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 377 DAG size of output: 6 [2020-07-21 00:45:11,761 WARN L193 SmtUtils]: Spent 5.45 s on a formula simplification. DAG size of input: 436 DAG size of output: 193 [2020-07-21 00:45:16,976 WARN L193 SmtUtils]: Spent 4.65 s on a formula simplification. DAG size of input: 414 DAG size of output: 190 [2020-07-21 00:45:22,801 WARN L193 SmtUtils]: Spent 5.34 s on a formula simplification. DAG size of input: 430 DAG size of output: 191 [2020-07-21 00:45:28,034 WARN L193 SmtUtils]: Spent 4.71 s on a formula simplification. DAG size of input: 408 DAG size of output: 187 [2020-07-21 00:45:33,780 WARN L193 SmtUtils]: Spent 5.24 s on a formula simplification. DAG size of input: 424 DAG size of output: 188 [2020-07-21 00:45:38,242 WARN L193 SmtUtils]: Spent 3.92 s on a formula simplification. DAG size of input: 402 DAG size of output: 184 [2020-07-21 00:45:43,939 WARN L193 SmtUtils]: Spent 5.18 s on a formula simplification. DAG size of input: 418 DAG size of output: 185 [2020-07-21 00:45:48,351 WARN L193 SmtUtils]: Spent 3.84 s on a formula simplification. DAG size of input: 396 DAG size of output: 181 [2020-07-21 00:45:53,776 WARN L193 SmtUtils]: Spent 4.88 s on a formula simplification. DAG size of input: 411 DAG size of output: 182 [2020-07-21 00:45:58,267 WARN L193 SmtUtils]: Spent 3.93 s on a formula simplification. DAG size of input: 391 DAG size of output: 178