/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=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_25x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:46:00,332 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 02:46:00,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:46:00,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:46:00,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:46:00,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:46:00,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:46:00,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:46:00,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:46:00,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:46:00,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:46:00,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:46:00,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:46:00,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:46:00,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 02:46:00,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:46:00,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:46:00,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:46:00,393 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 02:46:00,416 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:46:00,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:46:00,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:46:00,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:46:00,417 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:46:00,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:46:00,418 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:46:00,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:46:00,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:46:00,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:46:00,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:46:00,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:46:00,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:46:00,419 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:46:00,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:46:00,419 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:46:00,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:46:00,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:46:00,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:46:00,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:46:00,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:46:00,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:46:00,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:46:00,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:46:00,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:46:00,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:46:00,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:46:00,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:46:00,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:46:00,422 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=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:46:00,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:46:00,728 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:46:00,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:46:00,733 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:46:00,733 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:46:00,734 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_25x0-1.c [2020-08-19 02:46:00,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/023111e57/eca019eae8f9432a86bd4396d5dcdacf/FLAGf48ebe225 [2020-08-19 02:46:01,201 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:46:01,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_25x0-1.c [2020-08-19 02:46:01,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/023111e57/eca019eae8f9432a86bd4396d5dcdacf/FLAGf48ebe225 [2020-08-19 02:46:01,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/023111e57/eca019eae8f9432a86bd4396d5dcdacf [2020-08-19 02:46:01,643 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:46:01,645 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:46:01,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:46:01,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:46:01,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:46:01,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:46:01" (1/1) ... [2020-08-19 02:46:01,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73ff463a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:01, skipping insertion in model container [2020-08-19 02:46:01,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:46:01" (1/1) ... [2020-08-19 02:46:01,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:46:01,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:46:01,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:46:01,847 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:46:01,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:46:01,879 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:46:01,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:01 WrapperNode [2020-08-19 02:46:01,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:46:01,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:46:01,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:46:01,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:46:01,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:01" (1/1) ... [2020-08-19 02:46:01,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:01" (1/1) ... [2020-08-19 02:46:01,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:01" (1/1) ... [2020-08-19 02:46:01,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:01" (1/1) ... [2020-08-19 02:46:01,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:01" (1/1) ... [2020-08-19 02:46:01,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:01" (1/1) ... [2020-08-19 02:46:01,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:01" (1/1) ... [2020-08-19 02:46:01,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:46:01,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:46:01,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:46:01,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:46:01,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:01" (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 02:46:02,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:46:02,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:46:02,049 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-19 02:46:02,049 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:46:02,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:46:02,049 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-19 02:46:02,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:46:02,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:46:02,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:46:02,203 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:46:02,203 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 02:46:02,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:46:02 BoogieIcfgContainer [2020-08-19 02:46:02,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:46:02,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:46:02,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:46:02,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:46:02,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:46:01" (1/3) ... [2020-08-19 02:46:02,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff66c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:46:02, skipping insertion in model container [2020-08-19 02:46:02,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:01" (2/3) ... [2020-08-19 02:46:02,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff66c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:46:02, skipping insertion in model container [2020-08-19 02:46:02,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:46:02" (3/3) ... [2020-08-19 02:46:02,215 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_25x0-1.c [2020-08-19 02:46:02,224 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:46:02,229 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:46:02,241 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:46:02,263 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:46:02,263 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:46:02,263 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:46:02,263 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:46:02,263 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:46:02,264 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:46:02,264 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:46:02,264 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:46:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-19 02:46:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 02:46:02,283 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:02,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:02,284 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:02,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:02,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-19 02:46:02,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:02,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305192714] [2020-08-19 02:46:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:02,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:02,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:02,552 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 02:46:02,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305192714] [2020-08-19 02:46:02,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:02,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:46:02,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953325331] [2020-08-19 02:46:02,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:46:02,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:02,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:46:02,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:46:02,590 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-19 02:46:02,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:02,684 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-19 02:46:02,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:46:02,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 02:46:02,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:02,696 INFO L225 Difference]: With dead ends: 30 [2020-08-19 02:46:02,696 INFO L226 Difference]: Without dead ends: 18 [2020-08-19 02:46:02,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:46:02,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-19 02:46:02,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-19 02:46:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 02:46:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-19 02:46:02,739 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-19 02:46:02,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:02,740 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-19 02:46:02,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:46:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-19 02:46:02,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 02:46:02,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:02,742 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 02:46:02,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:46:02,743 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:02,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:02,743 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-19 02:46:02,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:02,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493542604] [2020-08-19 02:46:02,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:02,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:02,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:02,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:02,887 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 02:46:02,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493542604] [2020-08-19 02:46:02,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:02,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 02:46:02,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338772950] [2020-08-19 02:46:02,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:46:02,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:02,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:46:02,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:46:02,892 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-19 02:46:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:02,956 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-19 02:46:02,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:46:02,957 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-19 02:46:02,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:02,958 INFO L225 Difference]: With dead ends: 25 [2020-08-19 02:46:02,958 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 02:46:02,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:46:02,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 02:46:02,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 02:46:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 02:46:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-19 02:46:02,967 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-19 02:46:02,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:02,967 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-19 02:46:02,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:46:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-19 02:46:02,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 02:46:02,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:02,969 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 02:46:02,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:46:02,970 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:02,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-19 02:46:02,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:02,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895461934] [2020-08-19 02:46:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,162 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 02:46:03,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895461934] [2020-08-19 02:46:03,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:03,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:46:03,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064372207] [2020-08-19 02:46:03,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:46:03,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:03,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:46:03,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:46:03,165 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-19 02:46:03,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:03,230 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-19 02:46:03,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:46:03,231 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-19 02:46:03,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:03,232 INFO L225 Difference]: With dead ends: 28 [2020-08-19 02:46:03,233 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 02:46:03,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:46:03,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 02:46:03,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-19 02:46:03,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 02:46:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-19 02:46:03,241 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-19 02:46:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:03,242 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-19 02:46:03,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:46:03,242 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-19 02:46:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 02:46:03,243 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:03,243 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 02:46:03,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:46:03,244 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-19 02:46:03,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:03,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386193471] [2020-08-19 02:46:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,432 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 02:46:03,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386193471] [2020-08-19 02:46:03,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:03,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 02:46:03,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447937208] [2020-08-19 02:46:03,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:46:03,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:03,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:46:03,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:46:03,436 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-19 02:46:03,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:03,533 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-19 02:46:03,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 02:46:03,534 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-19 02:46:03,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:03,535 INFO L225 Difference]: With dead ends: 31 [2020-08-19 02:46:03,535 INFO L226 Difference]: Without dead ends: 27 [2020-08-19 02:46:03,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:46:03,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-19 02:46:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-19 02:46:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 02:46:03,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-19 02:46:03,542 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-19 02:46:03,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:03,543 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-19 02:46:03,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:46:03,543 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-19 02:46:03,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 02:46:03,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:03,545 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 02:46:03,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:46:03,545 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:03,546 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-19 02:46:03,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:03,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132977897] [2020-08-19 02:46:03,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,702 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 02:46:03,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132977897] [2020-08-19 02:46:03,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:03,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 02:46:03,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657053382] [2020-08-19 02:46:03,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:46:03,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:03,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:46:03,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:46:03,705 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-19 02:46:03,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:03,796 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-19 02:46:03,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:46:03,798 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-19 02:46:03,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:03,799 INFO L225 Difference]: With dead ends: 34 [2020-08-19 02:46:03,799 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 02:46:03,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:46:03,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 02:46:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 02:46:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 02:46:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-19 02:46:03,812 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-19 02:46:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:03,812 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-19 02:46:03,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:46:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-19 02:46:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 02:46:03,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:03,818 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 02:46:03,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:46:03,818 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:03,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:03,819 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-19 02:46:03,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:03,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709157030] [2020-08-19 02:46:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:03,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,015 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 02:46:04,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709157030] [2020-08-19 02:46:04,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:04,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:46:04,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377024465] [2020-08-19 02:46:04,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:46:04,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:04,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:46:04,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:46:04,018 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-19 02:46:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:04,105 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-19 02:46:04,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:46:04,105 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-19 02:46:04,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:04,107 INFO L225 Difference]: With dead ends: 37 [2020-08-19 02:46:04,107 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 02:46:04,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-19 02:46:04,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 02:46:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-19 02:46:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 02:46:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-19 02:46:04,115 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-19 02:46:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:04,115 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-19 02:46:04,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:46:04,116 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-19 02:46:04,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 02:46:04,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:04,118 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 02:46:04,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:46:04,118 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:04,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:04,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-19 02:46:04,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:04,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346897100] [2020-08-19 02:46:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,351 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 02:46:04,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346897100] [2020-08-19 02:46:04,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:04,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 02:46:04,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927669386] [2020-08-19 02:46:04,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 02:46:04,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:04,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 02:46:04,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:46:04,354 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-19 02:46:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:04,476 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-19 02:46:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 02:46:04,476 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-19 02:46:04,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:04,478 INFO L225 Difference]: With dead ends: 40 [2020-08-19 02:46:04,478 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 02:46:04,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-19 02:46:04,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 02:46:04,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-19 02:46:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 02:46:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-19 02:46:04,485 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-19 02:46:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:04,486 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-19 02:46:04,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 02:46:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-19 02:46:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 02:46:04,487 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:04,487 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 02:46:04,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:46:04,488 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:04,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:04,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-19 02:46:04,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:04,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209520283] [2020-08-19 02:46:04,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,702 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 02:46:04,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209520283] [2020-08-19 02:46:04,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:04,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 02:46:04,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195755338] [2020-08-19 02:46:04,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 02:46:04,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:04,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 02:46:04,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:46:04,705 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-19 02:46:04,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:04,812 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-19 02:46:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 02:46:04,812 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-19 02:46:04,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:04,814 INFO L225 Difference]: With dead ends: 43 [2020-08-19 02:46:04,814 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 02:46:04,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-19 02:46:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 02:46:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-19 02:46:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 02:46:04,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-19 02:46:04,821 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-19 02:46:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:04,821 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-19 02:46:04,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 02:46:04,822 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-19 02:46:04,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 02:46:04,823 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:04,823 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 02:46:04,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:46:04,823 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:04,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:04,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-19 02:46:04,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:04,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317262524] [2020-08-19 02:46:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:04,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,120 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 02:46:05,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317262524] [2020-08-19 02:46:05,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:05,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 02:46:05,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376698332] [2020-08-19 02:46:05,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 02:46:05,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:05,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 02:46:05,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:46:05,128 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-19 02:46:05,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:05,250 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-19 02:46:05,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 02:46:05,251 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-19 02:46:05,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:05,252 INFO L225 Difference]: With dead ends: 46 [2020-08-19 02:46:05,253 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 02:46:05,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-19 02:46:05,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 02:46:05,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-19 02:46:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 02:46:05,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-19 02:46:05,260 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-19 02:46:05,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:05,260 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-19 02:46:05,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 02:46:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-19 02:46:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 02:46:05,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:05,262 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 02:46:05,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 02:46:05,262 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:05,263 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-19 02:46:05,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:05,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547531535] [2020-08-19 02:46:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,578 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 02:46:05,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547531535] [2020-08-19 02:46:05,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:05,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 02:46:05,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51797074] [2020-08-19 02:46:05,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 02:46:05,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:05,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 02:46:05,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:46:05,584 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-19 02:46:05,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:05,732 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-19 02:46:05,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 02:46:05,733 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-19 02:46:05,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:05,734 INFO L225 Difference]: With dead ends: 49 [2020-08-19 02:46:05,734 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 02:46:05,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-19 02:46:05,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 02:46:05,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-19 02:46:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 02:46:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-19 02:46:05,742 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-19 02:46:05,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:05,743 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-19 02:46:05,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 02:46:05,743 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-19 02:46:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 02:46:05,744 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:05,744 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 02:46:05,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 02:46:05,744 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:05,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-19 02:46:05,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:05,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448106315] [2020-08-19 02:46:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:05,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,101 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 02:46:06,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448106315] [2020-08-19 02:46:06,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:06,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 02:46:06,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494808788] [2020-08-19 02:46:06,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 02:46:06,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:06,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 02:46:06,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:46:06,106 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-19 02:46:06,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:06,297 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-19 02:46:06,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 02:46:06,298 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-19 02:46:06,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:06,299 INFO L225 Difference]: With dead ends: 52 [2020-08-19 02:46:06,299 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 02:46:06,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-19 02:46:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 02:46:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-19 02:46:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 02:46:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-19 02:46:06,312 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-19 02:46:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:06,312 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-19 02:46:06,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 02:46:06,312 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-19 02:46:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-19 02:46:06,315 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:06,315 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 02:46:06,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 02:46:06,316 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:06,316 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-19 02:46:06,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:06,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551738646] [2020-08-19 02:46:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:06,773 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 02:46:06,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551738646] [2020-08-19 02:46:06,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:06,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 02:46:06,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641981116] [2020-08-19 02:46:06,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 02:46:06,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:06,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 02:46:06,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-19 02:46:06,777 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-19 02:46:06,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:06,956 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-19 02:46:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 02:46:06,957 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-19 02:46:06,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:06,958 INFO L225 Difference]: With dead ends: 55 [2020-08-19 02:46:06,958 INFO L226 Difference]: Without dead ends: 51 [2020-08-19 02:46:06,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-19 02:46:06,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-19 02:46:06,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-19 02:46:06,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-19 02:46:06,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-19 02:46:06,966 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-19 02:46:06,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:06,967 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-19 02:46:06,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 02:46:06,967 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-19 02:46:06,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-19 02:46:06,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:06,968 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 02:46:06,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 02:46:06,969 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:06,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:06,969 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-19 02:46:06,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:06,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140736937] [2020-08-19 02:46:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,543 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 02:46:07,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140736937] [2020-08-19 02:46:07,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:07,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 02:46:07,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540091136] [2020-08-19 02:46:07,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 02:46:07,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:07,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 02:46:07,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-19 02:46:07,546 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-19 02:46:07,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:07,718 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-19 02:46:07,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 02:46:07,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-19 02:46:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:07,719 INFO L225 Difference]: With dead ends: 58 [2020-08-19 02:46:07,719 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 02:46:07,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-19 02:46:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 02:46:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-19 02:46:07,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 02:46:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-19 02:46:07,726 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-19 02:46:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:07,726 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-19 02:46:07,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 02:46:07,727 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-19 02:46:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 02:46:07,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:07,728 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 02:46:07,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 02:46:07,728 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:07,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-19 02:46:07,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:07,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647783691] [2020-08-19 02:46:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:07,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,251 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 02:46:08,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647783691] [2020-08-19 02:46:08,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:08,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 02:46:08,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79103437] [2020-08-19 02:46:08,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 02:46:08,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:08,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 02:46:08,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-19 02:46:08,254 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-19 02:46:08,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:08,434 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-19 02:46:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 02:46:08,435 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-19 02:46:08,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:08,436 INFO L225 Difference]: With dead ends: 61 [2020-08-19 02:46:08,436 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 02:46:08,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-19 02:46:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 02:46:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-19 02:46:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 02:46:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-19 02:46:08,443 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-19 02:46:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:08,444 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-19 02:46:08,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 02:46:08,444 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-19 02:46:08,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-19 02:46:08,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:08,445 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 02:46:08,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 02:46:08,446 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:08,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:08,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-19 02:46:08,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:08,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235507977] [2020-08-19 02:46:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:08,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,029 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 02:46:09,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235507977] [2020-08-19 02:46:09,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:09,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 02:46:09,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480305613] [2020-08-19 02:46:09,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 02:46:09,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:09,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 02:46:09,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-19 02:46:09,032 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-19 02:46:09,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:09,254 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-19 02:46:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 02:46:09,255 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-19 02:46:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:09,256 INFO L225 Difference]: With dead ends: 64 [2020-08-19 02:46:09,256 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 02:46:09,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 02:46:09,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 02:46:09,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-19 02:46:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-19 02:46:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-19 02:46:09,267 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-19 02:46:09,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:09,270 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-19 02:46:09,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 02:46:09,270 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-19 02:46:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-19 02:46:09,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:09,272 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 02:46:09,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 02:46:09,273 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:09,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:09,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-19 02:46:09,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:09,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85160904] [2020-08-19 02:46:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:09,876 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 02:46:09,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85160904] [2020-08-19 02:46:09,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:09,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 02:46:09,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728569042] [2020-08-19 02:46:09,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 02:46:09,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:09,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 02:46:09,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-19 02:46:09,879 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-19 02:46:10,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:10,109 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-19 02:46:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 02:46:10,109 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-19 02:46:10,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:10,110 INFO L225 Difference]: With dead ends: 67 [2020-08-19 02:46:10,110 INFO L226 Difference]: Without dead ends: 63 [2020-08-19 02:46:10,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-08-19 02:46:10,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-19 02:46:10,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-19 02:46:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-19 02:46:10,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-19 02:46:10,116 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-19 02:46:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:10,120 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-19 02:46:10,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 02:46:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-19 02:46:10,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 02:46:10,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:10,121 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 02:46:10,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 02:46:10,122 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:10,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:10,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-08-19 02:46:10,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:10,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132905350] [2020-08-19 02:46:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:10,727 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 02:46:10,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132905350] [2020-08-19 02:46:10,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:10,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 02:46:10,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289446515] [2020-08-19 02:46:10,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 02:46:10,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:10,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 02:46:10,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-19 02:46:10,729 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-19 02:46:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:10,978 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-19 02:46:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 02:46:10,978 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-19 02:46:10,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:10,980 INFO L225 Difference]: With dead ends: 70 [2020-08-19 02:46:10,980 INFO L226 Difference]: Without dead ends: 66 [2020-08-19 02:46:10,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-19 02:46:10,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-19 02:46:10,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-19 02:46:10,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-19 02:46:10,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-19 02:46:10,985 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-19 02:46:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:10,986 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-19 02:46:10,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 02:46:10,986 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-19 02:46:10,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-19 02:46:10,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:10,987 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 02:46:10,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 02:46:10,988 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:10,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:10,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-08-19 02:46:10,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:10,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101128785] [2020-08-19 02:46:10,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:11,699 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 02:46:11,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101128785] [2020-08-19 02:46:11,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:11,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 02:46:11,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780660940] [2020-08-19 02:46:11,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 02:46:11,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:11,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 02:46:11,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-19 02:46:11,711 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-19 02:46:12,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:12,011 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-19 02:46:12,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 02:46:12,011 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-19 02:46:12,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:12,012 INFO L225 Difference]: With dead ends: 73 [2020-08-19 02:46:12,013 INFO L226 Difference]: Without dead ends: 69 [2020-08-19 02:46:12,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-08-19 02:46:12,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-19 02:46:12,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-19 02:46:12,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-19 02:46:12,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-19 02:46:12,021 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-19 02:46:12,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:12,021 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-19 02:46:12,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 02:46:12,022 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-19 02:46:12,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-19 02:46:12,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:12,024 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 02:46:12,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 02:46:12,024 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:12,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:12,025 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-08-19 02:46:12,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:12,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775468365] [2020-08-19 02:46:12,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:12,798 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 02:46:12,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775468365] [2020-08-19 02:46:12,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:12,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 02:46:12,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515076028] [2020-08-19 02:46:12,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 02:46:12,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:12,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 02:46:12,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-19 02:46:12,801 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-19 02:46:13,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:13,092 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-19 02:46:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 02:46:13,092 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-19 02:46:13,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:13,093 INFO L225 Difference]: With dead ends: 76 [2020-08-19 02:46:13,094 INFO L226 Difference]: Without dead ends: 72 [2020-08-19 02:46:13,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-19 02:46:13,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-19 02:46:13,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-19 02:46:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-19 02:46:13,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-19 02:46:13,099 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-19 02:46:13,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:13,099 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-19 02:46:13,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 02:46:13,100 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-19 02:46:13,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-19 02:46:13,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:13,101 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 02:46:13,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 02:46:13,101 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:13,102 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-08-19 02:46:13,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:13,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840857740] [2020-08-19 02:46:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:13,999 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 02:46:14,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840857740] [2020-08-19 02:46:14,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:14,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 02:46:14,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283786977] [2020-08-19 02:46:14,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 02:46:14,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:14,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 02:46:14,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-19 02:46:14,003 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-19 02:46:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:14,427 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-19 02:46:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 02:46:14,428 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-19 02:46:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:14,429 INFO L225 Difference]: With dead ends: 79 [2020-08-19 02:46:14,429 INFO L226 Difference]: Without dead ends: 75 [2020-08-19 02:46:14,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-19 02:46:14,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-19 02:46:14,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-19 02:46:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-19 02:46:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-19 02:46:14,434 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-19 02:46:14,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:14,434 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-19 02:46:14,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 02:46:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-19 02:46:14,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-19 02:46:14,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:14,436 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 02:46:14,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 02:46:14,436 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:14,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:14,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-08-19 02:46:14,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:14,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541906288] [2020-08-19 02:46:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:14,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,287 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 02:46:15,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541906288] [2020-08-19 02:46:15,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:15,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 02:46:15,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375690494] [2020-08-19 02:46:15,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 02:46:15,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:15,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 02:46:15,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-19 02:46:15,289 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2020-08-19 02:46:15,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:15,582 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-19 02:46:15,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 02:46:15,583 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2020-08-19 02:46:15,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:15,584 INFO L225 Difference]: With dead ends: 82 [2020-08-19 02:46:15,584 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 02:46:15,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-08-19 02:46:15,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 02:46:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-19 02:46:15,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-19 02:46:15,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-19 02:46:15,589 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-19 02:46:15,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:15,589 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-19 02:46:15,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 02:46:15,589 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-19 02:46:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-19 02:46:15,591 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:15,591 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 02:46:15,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 02:46:15,591 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:15,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:15,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1648275844, now seen corresponding path program 21 times [2020-08-19 02:46:15,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:15,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437897290] [2020-08-19 02:46:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:15,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,475 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 02:46:16,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437897290] [2020-08-19 02:46:16,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:16,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 02:46:16,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383050747] [2020-08-19 02:46:16,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 02:46:16,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:16,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 02:46:16,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-19 02:46:16,478 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2020-08-19 02:46:16,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:16,863 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-08-19 02:46:16,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 02:46:16,864 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-08-19 02:46:16,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:16,865 INFO L225 Difference]: With dead ends: 85 [2020-08-19 02:46:16,865 INFO L226 Difference]: Without dead ends: 81 [2020-08-19 02:46:16,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2020-08-19 02:46:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-19 02:46:16,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-19 02:46:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-19 02:46:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-19 02:46:16,870 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-08-19 02:46:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:16,871 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-19 02:46:16,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 02:46:16,871 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-19 02:46:16,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-19 02:46:16,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:16,872 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 02:46:16,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 02:46:16,873 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:16,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:16,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1314278308, now seen corresponding path program 22 times [2020-08-19 02:46:16,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:16,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722688170] [2020-08-19 02:46:16,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:16,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:17,952 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 02:46:17,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722688170] [2020-08-19 02:46:17,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:17,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 02:46:17,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913221968] [2020-08-19 02:46:17,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 02:46:17,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:17,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 02:46:17,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-19 02:46:17,954 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2020-08-19 02:46:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:18,321 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-08-19 02:46:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 02:46:18,326 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2020-08-19 02:46:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:18,327 INFO L225 Difference]: With dead ends: 88 [2020-08-19 02:46:18,327 INFO L226 Difference]: Without dead ends: 84 [2020-08-19 02:46:18,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2020-08-19 02:46:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-19 02:46:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-19 02:46:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-19 02:46:18,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-19 02:46:18,333 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-08-19 02:46:18,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:18,333 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-19 02:46:18,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 02:46:18,333 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-19 02:46:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-19 02:46:18,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:18,335 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 02:46:18,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 02:46:18,335 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:18,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:18,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2015638980, now seen corresponding path program 23 times [2020-08-19 02:46:18,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:18,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673522713] [2020-08-19 02:46:18,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:18,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:19,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:19,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:19,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:19,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:19,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:19,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:19,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:19,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:19,409 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 02:46:19,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673522713] [2020-08-19 02:46:19,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:19,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-19 02:46:19,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082157227] [2020-08-19 02:46:19,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-19 02:46:19,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:19,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-19 02:46:19,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-19 02:46:19,412 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2020-08-19 02:46:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:19,793 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-19 02:46:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 02:46:19,795 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2020-08-19 02:46:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:19,796 INFO L225 Difference]: With dead ends: 91 [2020-08-19 02:46:19,796 INFO L226 Difference]: Without dead ends: 87 [2020-08-19 02:46:19,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2020-08-19 02:46:19,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-19 02:46:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-19 02:46:19,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-19 02:46:19,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-19 02:46:19,802 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-08-19 02:46:19,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:19,802 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-19 02:46:19,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-19 02:46:19,802 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-19 02:46:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-19 02:46:19,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:19,804 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 02:46:19,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 02:46:19,804 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:19,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:19,804 INFO L82 PathProgramCache]: Analyzing trace with hash 483163804, now seen corresponding path program 24 times [2020-08-19 02:46:19,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:19,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187265366] [2020-08-19 02:46:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:19,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:19,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:19,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:19,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:19,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:20,849 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 02:46:20,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187265366] [2020-08-19 02:46:20,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:46:20,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-19 02:46:20,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484829399] [2020-08-19 02:46:20,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-19 02:46:20,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:20,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-19 02:46:20,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-19 02:46:20,852 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2020-08-19 02:46:21,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:21,280 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-19 02:46:21,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-19 02:46:21,280 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2020-08-19 02:46:21,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:21,282 INFO L225 Difference]: With dead ends: 94 [2020-08-19 02:46:21,282 INFO L226 Difference]: Without dead ends: 90 [2020-08-19 02:46:21,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2020-08-19 02:46:21,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-19 02:46:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-19 02:46:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-19 02:46:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-19 02:46:21,289 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-08-19 02:46:21,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:21,289 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-19 02:46:21,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-19 02:46:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-19 02:46:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-19 02:46:21,291 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:21,291 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 02:46:21,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 02:46:21,291 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:21,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1060706820, now seen corresponding path program 25 times [2020-08-19 02:46:21,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:21,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426853022] [2020-08-19 02:46:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:21,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:21,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:46:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:21,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:21,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:21,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:21,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:21,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:21,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:21,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:21,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 02:46:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1900 trivial. 0 not checked. [2020-08-19 02:46:22,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426853022] [2020-08-19 02:46:22,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:22,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 02:46:22,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244333087] [2020-08-19 02:46:22,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:46:22,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:22,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:46:22,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:46:22,717 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 8 states. [2020-08-19 02:46:22,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:22,809 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2020-08-19 02:46:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 02:46:22,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 163 [2020-08-19 02:46:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:22,810 INFO L225 Difference]: With dead ends: 90 [2020-08-19 02:46:22,810 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 02:46:22,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:46:22,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 02:46:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 02:46:22,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 02:46:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 02:46:22,812 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 163 [2020-08-19 02:46:22,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:22,812 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 02:46:22,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:46:22,812 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 02:46:22,812 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 02:46:22,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 02:46:22,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 02:46:22,881 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 02:46:22,881 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:46:22,881 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:46:22,881 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 02:46:22,881 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 02:46:22,881 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 02:46:22,882 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-08-19 02:46:22,882 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2020-08-19 02:46:22,882 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-08-19 02:46:22,882 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-08-19 02:46:22,882 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-08-19 02:46:22,882 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-08-19 02:46:22,882 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-08-19 02:46:22,883 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-08-19 02:46:22,883 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-08-19 02:46:22,883 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-08-19 02:46:22,883 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-19 02:46:22,883 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 25) (<= 25 main_~a~0)) [2020-08-19 02:46:22,883 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-19 02:46:22,883 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-08-19 02:46:22,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:46:22 BoogieIcfgContainer [2020-08-19 02:46:22,889 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:46:22,892 INFO L168 Benchmark]: Toolchain (without parser) took 21246.70 ms. Allocated memory was 140.0 MB in the beginning and 648.0 MB in the end (delta: 508.0 MB). Free memory was 102.9 MB in the beginning and 137.9 MB in the end (delta: -35.0 MB). Peak memory consumption was 473.0 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:22,892 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 02:46:22,893 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.15 ms. Allocated memory is still 140.0 MB. Free memory was 102.7 MB in the beginning and 93.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:22,893 INFO L168 Benchmark]: Boogie Preprocessor took 27.04 ms. Allocated memory is still 140.0 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:22,894 INFO L168 Benchmark]: RCFGBuilder took 299.23 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 170.1 MB in the end (delta: -78.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:22,894 INFO L168 Benchmark]: TraceAbstraction took 20680.89 ms. Allocated memory was 202.4 MB in the beginning and 648.0 MB in the end (delta: 445.6 MB). Free memory was 170.1 MB in the beginning and 137.9 MB in the end (delta: 32.2 MB). Peak memory consumption was 477.8 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:22,897 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 230.15 ms. Allocated memory is still 140.0 MB. Free memory was 102.7 MB in the beginning and 93.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.04 ms. Allocated memory is still 140.0 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 299.23 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 170.1 MB in the end (delta: -78.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20680.89 ms. Allocated memory was 202.4 MB in the beginning and 648.0 MB in the end (delta: 445.6 MB). Free memory was 170.1 MB in the beginning and 137.9 MB in the end (delta: 32.2 MB). Peak memory consumption was 477.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.5s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 312 SDtfs, 780 SDslu, 1609 SDs, 0 SdLazy, 1159 SolverSat, 66 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1539 GetRequests, 829 SyntacticMatches, 0 SemanticMatches, 710 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4906 ImplicationChecksByTransitivity, 8.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 26 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 13.8s InterpolantComputationTime, 2288 NumberOfCodeBlocks, 2288 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 2262 ConstructedInterpolants, 0 QuantifiedInterpolants, 774120 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 9400/16900 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...