/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o200.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 00:20:00,383 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 00:20:00,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 00:20:00,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 00:20:00,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 00:20:00,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 00:20:00,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 00:20:00,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 00:20:00,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 00:20:00,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 00:20:00,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 00:20:00,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 00:20:00,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 00:20:00,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 00:20:00,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 00:20:00,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 00:20:00,528 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 00:20:00,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 00:20:00,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 00:20:00,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 00:20:00,531 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 00:20:00,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 00:20:00,531 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 00:20:00,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 00:20:00,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 00:20:00,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 00:20:00,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 00:20:00,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 00:20:00,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 00:20:00,534 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 00:20:00,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 00:20:00,534 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 00:20:00,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 00:20:00,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 00:20:00,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 00:20:00,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 00:20:00,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 00:20:00,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 00:20:00,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 00:20:00,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 00:20:00,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 00:20:00,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 00:20:00,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 00:20:00,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 00:20:00,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 00:20:00,537 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; [2020-08-19 00:20:00,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 00:20:00,854 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 00:20:00,858 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 00:20:00,860 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 00:20:00,860 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 00:20:00,861 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o200.c [2020-08-19 00:20:00,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef0534806/429bb4896a4c431485ac679945e892e1/FLAGd6f24f6ca [2020-08-19 00:20:01,409 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 00:20:01,410 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o200.c [2020-08-19 00:20:01,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef0534806/429bb4896a4c431485ac679945e892e1/FLAGd6f24f6ca [2020-08-19 00:20:01,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef0534806/429bb4896a4c431485ac679945e892e1 [2020-08-19 00:20:01,772 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 00:20:01,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 00:20:01,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 00:20:01,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 00:20:01,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 00:20:01,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:20:01" (1/1) ... [2020-08-19 00:20:01,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab41b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:01, skipping insertion in model container [2020-08-19 00:20:01,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:20:01" (1/1) ... [2020-08-19 00:20:01,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 00:20:01,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 00:20:01,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:20:01,990 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 00:20:02,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:20:02,016 INFO L208 MainTranslator]: Completed translation [2020-08-19 00:20:02,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:02 WrapperNode [2020-08-19 00:20:02,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 00:20:02,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 00:20:02,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 00:20:02,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 00:20:02,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:02" (1/1) ... [2020-08-19 00:20:02,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:02" (1/1) ... [2020-08-19 00:20:02,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:02" (1/1) ... [2020-08-19 00:20:02,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:02" (1/1) ... [2020-08-19 00:20:02,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:02" (1/1) ... [2020-08-19 00:20:02,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:02" (1/1) ... [2020-08-19 00:20:02,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:02" (1/1) ... [2020-08-19 00:20:02,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 00:20:02,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 00:20:02,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 00:20:02,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 00:20:02,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-19 00:20:02,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 00:20:02,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 00:20:02,203 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-19 00:20:02,203 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 00:20:02,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 00:20:02,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 00:20:02,203 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-19 00:20:02,203 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 00:20:02,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 00:20:02,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 00:20:02,374 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 00:20:02,374 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 00:20:02,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:20:02 BoogieIcfgContainer [2020-08-19 00:20:02,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 00:20:02,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 00:20:02,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 00:20:02,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 00:20:02,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 12:20:01" (1/3) ... [2020-08-19 00:20:02,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361c2ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:20:02, skipping insertion in model container [2020-08-19 00:20:02,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:02" (2/3) ... [2020-08-19 00:20:02,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361c2ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:20:02, skipping insertion in model container [2020-08-19 00:20:02,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:20:02" (3/3) ... [2020-08-19 00:20:02,387 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o200.c [2020-08-19 00:20:02,397 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 00:20:02,405 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 00:20:02,419 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 00:20:02,443 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 00:20:02,444 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 00:20:02,444 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 00:20:02,444 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 00:20:02,444 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 00:20:02,444 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 00:20:02,444 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 00:20:02,445 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 00:20:02,461 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-19 00:20:02,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 00:20:02,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:02,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:02,468 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:02,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:02,474 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-19 00:20:02,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:02,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441613239] [2020-08-19 00:20:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:02,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:02,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:02,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441613239] [2020-08-19 00:20:02,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:02,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 00:20:02,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087905674] [2020-08-19 00:20:02,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 00:20:02,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:02,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 00:20:02,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 00:20:02,811 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-19 00:20:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:02,879 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-19 00:20:02,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 00:20:02,881 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 00:20:02,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:02,891 INFO L225 Difference]: With dead ends: 32 [2020-08-19 00:20:02,892 INFO L226 Difference]: Without dead ends: 18 [2020-08-19 00:20:02,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 00:20:02,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-19 00:20:02,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-19 00:20:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 00:20:02,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-19 00:20:02,947 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-19 00:20:02,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:02,947 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-19 00:20:02,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 00:20:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-19 00:20:02,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 00:20:02,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:02,950 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:02,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 00:20:02,951 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:02,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:02,952 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-19 00:20:02,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:02,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29710110] [2020-08-19 00:20:02,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:03,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:03,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:03,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 00:20:03,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29710110] [2020-08-19 00:20:03,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:03,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 00:20:03,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706054988] [2020-08-19 00:20:03,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 00:20:03,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:03,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 00:20:03,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 00:20:03,234 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-19 00:20:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:03,285 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-19 00:20:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 00:20:03,287 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-19 00:20:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:03,289 INFO L225 Difference]: With dead ends: 25 [2020-08-19 00:20:03,289 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 00:20:03,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 00:20:03,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 00:20:03,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 00:20:03,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 00:20:03,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-19 00:20:03,304 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-19 00:20:03,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:03,304 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-19 00:20:03,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 00:20:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-19 00:20:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 00:20:03,306 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:03,306 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:03,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 00:20:03,307 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:03,308 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-19 00:20:03,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:03,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155763761] [2020-08-19 00:20:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:03,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:03,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:03,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:03,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 00:20:03,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155763761] [2020-08-19 00:20:03,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:03,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 00:20:03,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403213644] [2020-08-19 00:20:03,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:20:03,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:03,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:20:03,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:20:03,562 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-19 00:20:03,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:03,602 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-19 00:20:03,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 00:20:03,603 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-19 00:20:03,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:03,605 INFO L225 Difference]: With dead ends: 28 [2020-08-19 00:20:03,605 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 00:20:03,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:20:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 00:20:03,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-19 00:20:03,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 00:20:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-19 00:20:03,613 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-19 00:20:03,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:03,613 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-19 00:20:03,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:20:03,614 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-19 00:20:03,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 00:20:03,615 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:03,615 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:03,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 00:20:03,616 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:03,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:03,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-19 00:20:03,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:03,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526440501] [2020-08-19 00:20:03,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:03,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:03,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:03,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:03,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:03,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-19 00:20:03,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526440501] [2020-08-19 00:20:03,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:03,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 00:20:03,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088741182] [2020-08-19 00:20:03,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 00:20:03,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:03,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 00:20:03,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-19 00:20:03,980 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-19 00:20:04,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:04,048 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-19 00:20:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 00:20:04,049 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-19 00:20:04,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:04,050 INFO L225 Difference]: With dead ends: 31 [2020-08-19 00:20:04,050 INFO L226 Difference]: Without dead ends: 27 [2020-08-19 00:20:04,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-19 00:20:04,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-19 00:20:04,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-19 00:20:04,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 00:20:04,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-19 00:20:04,059 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-19 00:20:04,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:04,060 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-19 00:20:04,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 00:20:04,060 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-19 00:20:04,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 00:20:04,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:04,061 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:04,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 00:20:04,062 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:04,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:04,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-19 00:20:04,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:04,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281914028] [2020-08-19 00:20:04,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-19 00:20:04,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281914028] [2020-08-19 00:20:04,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:04,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 00:20:04,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49161819] [2020-08-19 00:20:04,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 00:20:04,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:04,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 00:20:04,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-19 00:20:04,333 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-19 00:20:04,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:04,413 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-19 00:20:04,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 00:20:04,414 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-19 00:20:04,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:04,415 INFO L225 Difference]: With dead ends: 34 [2020-08-19 00:20:04,416 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 00:20:04,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-19 00:20:04,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 00:20:04,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 00:20:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 00:20:04,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-19 00:20:04,423 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-19 00:20:04,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:04,423 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-19 00:20:04,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 00:20:04,424 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-19 00:20:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 00:20:04,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:04,425 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:04,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 00:20:04,426 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:04,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:04,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-19 00:20:04,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:04,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115517423] [2020-08-19 00:20:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-19 00:20:04,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115517423] [2020-08-19 00:20:04,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:04,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 00:20:04,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114041569] [2020-08-19 00:20:04,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 00:20:04,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:04,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 00:20:04,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-19 00:20:04,788 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-19 00:20:04,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:04,887 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-19 00:20:04,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 00:20:04,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-19 00:20:04,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:04,889 INFO L225 Difference]: With dead ends: 37 [2020-08-19 00:20:04,889 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 00:20:04,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-19 00:20:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 00:20:04,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-19 00:20:04,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 00:20:04,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-19 00:20:04,896 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-19 00:20:04,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:04,897 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-19 00:20:04,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 00:20:04,897 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-19 00:20:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 00:20:04,899 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:04,899 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:04,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 00:20:04,899 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:04,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:04,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-19 00:20:04,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:04,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429754484] [2020-08-19 00:20:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:04,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-19 00:20:05,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429754484] [2020-08-19 00:20:05,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:05,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 00:20:05,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891937632] [2020-08-19 00:20:05,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 00:20:05,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:05,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 00:20:05,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-19 00:20:05,278 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-19 00:20:05,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:05,404 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-19 00:20:05,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 00:20:05,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-19 00:20:05,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:05,406 INFO L225 Difference]: With dead ends: 40 [2020-08-19 00:20:05,407 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 00:20:05,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-19 00:20:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 00:20:05,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-19 00:20:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 00:20:05,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-19 00:20:05,414 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-19 00:20:05,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:05,414 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-19 00:20:05,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 00:20:05,415 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-19 00:20:05,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 00:20:05,416 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:05,416 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:05,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 00:20:05,416 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:05,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-19 00:20:05,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:05,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078865865] [2020-08-19 00:20:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-19 00:20:05,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078865865] [2020-08-19 00:20:05,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:05,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 00:20:05,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691491134] [2020-08-19 00:20:05,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 00:20:05,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:05,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 00:20:05,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-19 00:20:05,848 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-19 00:20:06,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:06,006 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-19 00:20:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 00:20:06,006 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-19 00:20:06,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:06,008 INFO L225 Difference]: With dead ends: 43 [2020-08-19 00:20:06,008 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 00:20:06,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-19 00:20:06,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 00:20:06,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-19 00:20:06,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 00:20:06,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-19 00:20:06,016 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-19 00:20:06,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:06,016 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-19 00:20:06,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 00:20:06,016 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-19 00:20:06,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 00:20:06,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:06,018 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:06,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 00:20:06,018 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:06,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:06,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-19 00:20:06,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:06,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849954655] [2020-08-19 00:20:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:06,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:06,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:06,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:06,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:06,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:06,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:06,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:06,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:06,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:06,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-19 00:20:06,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849954655] [2020-08-19 00:20:06,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:06,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 00:20:06,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292532967] [2020-08-19 00:20:06,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 00:20:06,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:06,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 00:20:06,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-19 00:20:06,559 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-19 00:20:06,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:06,728 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-19 00:20:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 00:20:06,729 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-19 00:20:06,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:06,732 INFO L225 Difference]: With dead ends: 46 [2020-08-19 00:20:06,732 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 00:20:06,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-19 00:20:06,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 00:20:06,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-19 00:20:06,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 00:20:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-19 00:20:06,742 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-19 00:20:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:06,743 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-19 00:20:06,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 00:20:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-19 00:20:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 00:20:06,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:06,745 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:06,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 00:20:06,745 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:06,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-19 00:20:06,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:06,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790495433] [2020-08-19 00:20:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:06,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:06,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:06,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:06,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:07,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:07,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:07,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:07,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:07,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:07,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:07,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-19 00:20:07,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790495433] [2020-08-19 00:20:07,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:07,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 00:20:07,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788681577] [2020-08-19 00:20:07,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 00:20:07,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:07,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 00:20:07,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-19 00:20:07,467 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-19 00:20:07,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:07,723 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-19 00:20:07,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 00:20:07,723 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-19 00:20:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:07,724 INFO L225 Difference]: With dead ends: 49 [2020-08-19 00:20:07,725 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 00:20:07,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-19 00:20:07,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 00:20:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-19 00:20:07,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 00:20:07,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-19 00:20:07,737 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-19 00:20:07,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:07,737 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-19 00:20:07,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 00:20:07,738 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-19 00:20:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 00:20:07,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:07,742 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:07,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 00:20:07,743 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:07,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-19 00:20:07,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:07,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391393267] [2020-08-19 00:20:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:07,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:07,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:07,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:07,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:08,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:08,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:08,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:08,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:08,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:08,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:08,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:08,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-19 00:20:08,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391393267] [2020-08-19 00:20:08,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:08,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 00:20:08,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398009204] [2020-08-19 00:20:08,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 00:20:08,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:08,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 00:20:08,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-19 00:20:08,506 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2020-08-19 00:20:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:08,769 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-19 00:20:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 00:20:08,770 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-19 00:20:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:08,771 INFO L225 Difference]: With dead ends: 52 [2020-08-19 00:20:08,771 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 00:20:08,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-19 00:20:08,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 00:20:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-19 00:20:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 00:20:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-19 00:20:08,779 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-19 00:20:08,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:08,779 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-19 00:20:08,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 00:20:08,779 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-19 00:20:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-19 00:20:08,780 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:08,780 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:08,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 00:20:08,781 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:08,781 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-19 00:20:08,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:08,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826460394] [2020-08-19 00:20:08,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:08,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:08,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:08,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:08,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:09,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:09,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:09,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:09,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:09,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:09,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:09,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:09,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:09,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-19 00:20:09,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826460394] [2020-08-19 00:20:09,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:09,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 00:20:09,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819931415] [2020-08-19 00:20:09,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 00:20:09,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:09,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 00:20:09,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-19 00:20:09,586 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 27 states. [2020-08-19 00:20:09,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:09,865 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-19 00:20:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 00:20:09,866 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-08-19 00:20:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:09,867 INFO L225 Difference]: With dead ends: 55 [2020-08-19 00:20:09,867 INFO L226 Difference]: Without dead ends: 51 [2020-08-19 00:20:09,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-19 00:20:09,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-19 00:20:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-19 00:20:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-19 00:20:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-19 00:20:09,880 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-19 00:20:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:09,884 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-19 00:20:09,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 00:20:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-19 00:20:09,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-19 00:20:09,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:09,888 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:09,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 00:20:09,888 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:09,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-19 00:20:09,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:09,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2538420] [2020-08-19 00:20:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:09,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:09,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:10,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:10,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:10,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:10,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:10,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:10,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:10,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:10,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:10,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:10,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:10,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:10,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-19 00:20:10,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2538420] [2020-08-19 00:20:10,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:10,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-19 00:20:10,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891298348] [2020-08-19 00:20:10,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-19 00:20:10,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:10,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-19 00:20:10,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-19 00:20:10,837 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2020-08-19 00:20:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:11,174 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-19 00:20:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-19 00:20:11,175 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2020-08-19 00:20:11,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:11,176 INFO L225 Difference]: With dead ends: 58 [2020-08-19 00:20:11,176 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 00:20:11,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-19 00:20:11,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 00:20:11,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-19 00:20:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 00:20:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-19 00:20:11,194 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-19 00:20:11,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:11,195 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-19 00:20:11,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-19 00:20:11,195 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-19 00:20:11,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 00:20:11,196 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:11,196 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:11,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 00:20:11,196 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:11,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-19 00:20:11,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:11,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089439126] [2020-08-19 00:20:11,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:11,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:11,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:11,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:11,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:11,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:11,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:11,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:11,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:11,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:11,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:11,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:11,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:11,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:12,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:12,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-19 00:20:12,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089439126] [2020-08-19 00:20:12,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:12,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-19 00:20:12,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191803869] [2020-08-19 00:20:12,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-19 00:20:12,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:12,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-19 00:20:12,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-19 00:20:12,190 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 31 states. [2020-08-19 00:20:12,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:12,622 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-19 00:20:12,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-19 00:20:12,623 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2020-08-19 00:20:12,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:12,624 INFO L225 Difference]: With dead ends: 61 [2020-08-19 00:20:12,624 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 00:20:12,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-19 00:20:12,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 00:20:12,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-19 00:20:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 00:20:12,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-19 00:20:12,632 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-19 00:20:12,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:12,633 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-19 00:20:12,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-19 00:20:12,633 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-19 00:20:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-19 00:20:12,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:12,634 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:12,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 00:20:12,635 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:12,635 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-19 00:20:12,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:12,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66620837] [2020-08-19 00:20:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:12,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:12,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:12,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:12,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:12,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:12,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:13,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:13,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:13,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:13,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:13,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:13,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:13,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:13,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:13,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:13,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-19 00:20:13,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66620837] [2020-08-19 00:20:13,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:13,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-19 00:20:13,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898615951] [2020-08-19 00:20:13,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-19 00:20:13,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:13,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-19 00:20:13,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-19 00:20:13,827 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 33 states. [2020-08-19 00:20:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:14,287 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-19 00:20:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-19 00:20:14,290 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2020-08-19 00:20:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:14,290 INFO L225 Difference]: With dead ends: 64 [2020-08-19 00:20:14,291 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 00:20:14,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-19 00:20:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 00:20:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-19 00:20:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-19 00:20:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-19 00:20:14,297 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-19 00:20:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:14,298 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-19 00:20:14,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-19 00:20:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-19 00:20:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-19 00:20:14,299 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:14,299 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:14,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 00:20:14,299 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:14,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-19 00:20:14,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:14,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925551005] [2020-08-19 00:20:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:14,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:14,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:14,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:14,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:14,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:14,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:14,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:14,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:14,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:14,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:14,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:14,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:15,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:15,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:15,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:15,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:15,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-19 00:20:15,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925551005] [2020-08-19 00:20:15,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:15,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-19 00:20:15,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250900055] [2020-08-19 00:20:15,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-19 00:20:15,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:15,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-19 00:20:15,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 00:20:15,604 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-08-19 00:20:16,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:16,224 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-19 00:20:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-19 00:20:16,225 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-08-19 00:20:16,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:16,226 INFO L225 Difference]: With dead ends: 67 [2020-08-19 00:20:16,230 INFO L226 Difference]: Without dead ends: 63 [2020-08-19 00:20:16,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 00:20:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-19 00:20:16,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-19 00:20:16,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-19 00:20:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-19 00:20:16,245 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-19 00:20:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:16,245 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-19 00:20:16,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-19 00:20:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-19 00:20:16,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 00:20:16,251 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:16,251 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:16,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 00:20:16,252 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:16,252 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-19 00:20:16,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:16,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734849169] [2020-08-19 00:20:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:16,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:16,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:16,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:16,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:16,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:16,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:16,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:16,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:17,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:17,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:17,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:17,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:17,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:17,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:17,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:17,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:17,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:17,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-19 00:20:17,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734849169] [2020-08-19 00:20:17,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:17,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-19 00:20:17,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330741128] [2020-08-19 00:20:17,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-19 00:20:17,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:17,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-19 00:20:17,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-19 00:20:17,823 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 37 states. [2020-08-19 00:20:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:18,414 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-19 00:20:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-19 00:20:18,414 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2020-08-19 00:20:18,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:18,416 INFO L225 Difference]: With dead ends: 70 [2020-08-19 00:20:18,416 INFO L226 Difference]: Without dead ends: 66 [2020-08-19 00:20:18,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-19 00:20:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-19 00:20:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-19 00:20:18,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-19 00:20:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-19 00:20:18,430 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-19 00:20:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:18,430 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-19 00:20:18,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-19 00:20:18,430 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-19 00:20:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-19 00:20:18,433 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:18,434 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:18,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 00:20:18,434 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:18,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:18,434 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-19 00:20:18,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:18,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160402512] [2020-08-19 00:20:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:18,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:18,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:18,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:18,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:18,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:18,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:18,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:18,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:19,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:19,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:19,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:19,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:19,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:19,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:19,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:19,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:19,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:19,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:20,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-19 00:20:20,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160402512] [2020-08-19 00:20:20,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:20,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-19 00:20:20,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986326773] [2020-08-19 00:20:20,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-19 00:20:20,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:20,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-19 00:20:20,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-19 00:20:20,132 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 39 states. [2020-08-19 00:20:20,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:20,817 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-19 00:20:20,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-19 00:20:20,817 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-08-19 00:20:20,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:20,818 INFO L225 Difference]: With dead ends: 73 [2020-08-19 00:20:20,818 INFO L226 Difference]: Without dead ends: 69 [2020-08-19 00:20:20,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-19 00:20:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-19 00:20:20,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-19 00:20:20,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-19 00:20:20,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-19 00:20:20,826 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-19 00:20:20,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:20,826 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-19 00:20:20,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-19 00:20:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-19 00:20:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-19 00:20:20,828 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:20,828 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:20,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 00:20:20,829 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:20,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:20,829 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-19 00:20:20,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:20,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522119292] [2020-08-19 00:20:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:20,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:20,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:20,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:21,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:21,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:21,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:21,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:21,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:21,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:21,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:21,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:21,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:21,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:21,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:21,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:21,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:22,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:22,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:22,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:22,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-19 00:20:22,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522119292] [2020-08-19 00:20:22,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:22,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-19 00:20:22,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783096692] [2020-08-19 00:20:22,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-19 00:20:22,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:22,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-19 00:20:22,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-19 00:20:22,535 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 41 states. [2020-08-19 00:20:23,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:23,250 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-19 00:20:23,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-19 00:20:23,251 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 121 [2020-08-19 00:20:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:23,252 INFO L225 Difference]: With dead ends: 76 [2020-08-19 00:20:23,253 INFO L226 Difference]: Without dead ends: 72 [2020-08-19 00:20:23,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-19 00:20:23,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-19 00:20:23,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-19 00:20:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-19 00:20:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-19 00:20:23,260 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-19 00:20:23,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:23,260 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-19 00:20:23,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-19 00:20:23,260 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-19 00:20:23,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-19 00:20:23,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:23,262 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:23,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 00:20:23,262 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:23,262 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-19 00:20:23,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:23,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478727889] [2020-08-19 00:20:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:23,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:23,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:23,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:23,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:23,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:23,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:23,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:23,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:23,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:23,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:23,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:23,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:24,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:24,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:24,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:24,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:24,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:24,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:24,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:24,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:24,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-19 00:20:24,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478727889] [2020-08-19 00:20:24,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:24,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-19 00:20:24,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907315691] [2020-08-19 00:20:24,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-19 00:20:24,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:24,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-19 00:20:24,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-19 00:20:24,983 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 43 states. [2020-08-19 00:20:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:25,773 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-19 00:20:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-19 00:20:25,774 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-08-19 00:20:25,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:25,775 INFO L225 Difference]: With dead ends: 79 [2020-08-19 00:20:25,775 INFO L226 Difference]: Without dead ends: 75 [2020-08-19 00:20:25,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-19 00:20:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-19 00:20:25,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-19 00:20:25,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-19 00:20:25,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-19 00:20:25,781 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-19 00:20:25,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:25,782 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-19 00:20:25,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-19 00:20:25,782 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-19 00:20:25,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-19 00:20:25,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:25,783 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:25,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 00:20:25,784 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:25,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:25,784 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-19 00:20:25,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:25,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524430679] [2020-08-19 00:20:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:25,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:25,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:25,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:25,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:26,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:26,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:26,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:26,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:26,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:26,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:26,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:26,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:26,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:26,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:26,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:26,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:27,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:27,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:27,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:27,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:27,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:27,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-19 00:20:27,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524430679] [2020-08-19 00:20:27,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:27,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-19 00:20:27,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126956090] [2020-08-19 00:20:27,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-19 00:20:27,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:27,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-19 00:20:27,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-19 00:20:27,728 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2020-08-19 00:20:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:28,604 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-19 00:20:28,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-19 00:20:28,604 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2020-08-19 00:20:28,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:28,606 INFO L225 Difference]: With dead ends: 82 [2020-08-19 00:20:28,606 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 00:20:28,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-19 00:20:28,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 00:20:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-19 00:20:28,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-19 00:20:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-19 00:20:28,612 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-19 00:20:28,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:28,613 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-19 00:20:28,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-19 00:20:28,613 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-19 00:20:28,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-19 00:20:28,614 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:28,614 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:28,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 00:20:28,615 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:28,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:28,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-08-19 00:20:28,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:28,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930553144] [2020-08-19 00:20:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:28,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:28,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:28,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:28,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:28,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:28,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:29,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:29,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:29,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:29,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:29,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:29,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:29,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:29,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:29,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:29,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:29,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:30,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:30,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:30,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:30,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:30,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:30,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-19 00:20:30,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930553144] [2020-08-19 00:20:30,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:30,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-08-19 00:20:30,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781099226] [2020-08-19 00:20:30,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-19 00:20:30,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:30,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-19 00:20:30,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-08-19 00:20:30,812 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 47 states. [2020-08-19 00:20:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:31,809 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-08-19 00:20:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-19 00:20:31,810 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2020-08-19 00:20:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:31,811 INFO L225 Difference]: With dead ends: 85 [2020-08-19 00:20:31,811 INFO L226 Difference]: Without dead ends: 81 [2020-08-19 00:20:31,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-08-19 00:20:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-19 00:20:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-19 00:20:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-19 00:20:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-19 00:20:31,817 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-08-19 00:20:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:31,818 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-19 00:20:31,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-19 00:20:31,818 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-19 00:20:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-19 00:20:31,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:31,819 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:31,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 00:20:31,820 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:31,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:31,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-08-19 00:20:31,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:31,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473808822] [2020-08-19 00:20:31,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:31,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:31,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:31,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:32,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:32,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:32,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:32,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:32,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:32,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:32,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:32,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:32,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:32,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:32,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:33,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:33,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:33,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:33,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:33,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:33,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:33,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:33,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:33,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:34,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-19 00:20:34,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473808822] [2020-08-19 00:20:34,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:34,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-19 00:20:34,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490763984] [2020-08-19 00:20:34,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-19 00:20:34,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:34,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-19 00:20:34,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-19 00:20:34,261 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 49 states. [2020-08-19 00:20:35,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:35,358 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-08-19 00:20:35,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-19 00:20:35,359 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2020-08-19 00:20:35,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:35,361 INFO L225 Difference]: With dead ends: 88 [2020-08-19 00:20:35,361 INFO L226 Difference]: Without dead ends: 84 [2020-08-19 00:20:35,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-19 00:20:35,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-19 00:20:35,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-19 00:20:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-19 00:20:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-19 00:20:35,368 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-08-19 00:20:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:35,369 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-19 00:20:35,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-19 00:20:35,369 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-19 00:20:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-19 00:20:35,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:35,371 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:35,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 00:20:35,371 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:35,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:35,372 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-08-19 00:20:35,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:35,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943945687] [2020-08-19 00:20:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:35,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:35,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:35,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:35,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:35,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:35,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:35,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:35,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:36,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:36,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:36,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:36,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:36,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:36,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:36,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:36,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:36,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:36,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:37,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:37,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:37,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:37,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:37,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:37,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:37,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:38,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-08-19 00:20:38,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943945687] [2020-08-19 00:20:38,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:38,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-08-19 00:20:38,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240681328] [2020-08-19 00:20:38,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-19 00:20:38,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:38,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-19 00:20:38,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-08-19 00:20:38,205 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 51 states. [2020-08-19 00:20:39,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:39,368 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-19 00:20:39,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-19 00:20:39,370 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2020-08-19 00:20:39,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:39,371 INFO L225 Difference]: With dead ends: 91 [2020-08-19 00:20:39,371 INFO L226 Difference]: Without dead ends: 87 [2020-08-19 00:20:39,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-08-19 00:20:39,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-19 00:20:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-19 00:20:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-19 00:20:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-19 00:20:39,377 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-08-19 00:20:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:39,378 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-19 00:20:39,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-19 00:20:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-19 00:20:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-19 00:20:39,380 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:39,380 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:39,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 00:20:39,381 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:39,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:39,381 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-08-19 00:20:39,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:39,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255719249] [2020-08-19 00:20:39,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:39,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:39,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:39,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:39,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:39,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:39,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:39,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:39,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:40,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:40,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:40,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:40,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:40,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:40,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:40,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:40,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:40,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:40,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:41,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:41,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:41,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:41,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:41,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:41,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:41,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:41,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-08-19 00:20:42,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255719249] [2020-08-19 00:20:42,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:42,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-19 00:20:42,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601958485] [2020-08-19 00:20:42,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-19 00:20:42,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:42,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-19 00:20:42,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-08-19 00:20:42,202 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 53 states. [2020-08-19 00:20:43,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:43,493 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-19 00:20:43,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-19 00:20:43,494 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 157 [2020-08-19 00:20:43,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:43,496 INFO L225 Difference]: With dead ends: 94 [2020-08-19 00:20:43,496 INFO L226 Difference]: Without dead ends: 90 [2020-08-19 00:20:43,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-08-19 00:20:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-19 00:20:43,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-19 00:20:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-19 00:20:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-19 00:20:43,503 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-08-19 00:20:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:43,503 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-19 00:20:43,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-19 00:20:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-19 00:20:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-19 00:20:43,504 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:43,505 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:43,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 00:20:43,505 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:43,505 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-08-19 00:20:43,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:43,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579022527] [2020-08-19 00:20:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:44,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:45,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:45,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:45,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:45,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:45,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:45,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:45,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:45,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:46,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-08-19 00:20:46,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579022527] [2020-08-19 00:20:46,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:46,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-19 00:20:46,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681957544] [2020-08-19 00:20:46,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-19 00:20:46,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:46,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-19 00:20:46,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-19 00:20:46,376 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2020-08-19 00:20:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:47,755 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-08-19 00:20:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-19 00:20:47,756 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2020-08-19 00:20:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:47,758 INFO L225 Difference]: With dead ends: 97 [2020-08-19 00:20:47,758 INFO L226 Difference]: Without dead ends: 93 [2020-08-19 00:20:47,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-19 00:20:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-19 00:20:47,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-08-19 00:20:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-19 00:20:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-08-19 00:20:47,765 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2020-08-19 00:20:47,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:47,766 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-08-19 00:20:47,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-19 00:20:47,766 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-08-19 00:20:47,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-19 00:20:47,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:47,767 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:47,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 00:20:47,768 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:47,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:47,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2020-08-19 00:20:47,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:47,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208388842] [2020-08-19 00:20:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:47,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:47,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:47,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:47,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:48,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:48,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:48,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:48,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:48,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:48,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:48,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:48,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:48,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:48,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-08-19 00:20:50,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208388842] [2020-08-19 00:20:50,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:50,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-08-19 00:20:50,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379514652] [2020-08-19 00:20:50,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-19 00:20:50,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:50,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-19 00:20:50,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-08-19 00:20:50,999 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 57 states. [2020-08-19 00:20:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:52,485 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-08-19 00:20:52,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-19 00:20:52,485 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 169 [2020-08-19 00:20:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:52,487 INFO L225 Difference]: With dead ends: 100 [2020-08-19 00:20:52,488 INFO L226 Difference]: Without dead ends: 96 [2020-08-19 00:20:52,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-08-19 00:20:52,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-19 00:20:52,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-08-19 00:20:52,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-19 00:20:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-08-19 00:20:52,493 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 169 [2020-08-19 00:20:52,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:52,494 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-08-19 00:20:52,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-19 00:20:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-08-19 00:20:52,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-08-19 00:20:52,495 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:52,495 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:52,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 00:20:52,496 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:52,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:52,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1625096943, now seen corresponding path program 27 times [2020-08-19 00:20:52,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:52,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624268149] [2020-08-19 00:20:52,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:52,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:52,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:52,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:52,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:52,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:52,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:54,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:54,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:54,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:54,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:54,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:54,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:54,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:54,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:55,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:55,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:55,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:55,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat